1 /* Definitions of target machine for Mitsubishi D30V. 2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 3 Free Software Foundation, Inc. 4 Contributed by Cygnus Solutions. 5 6 This file is part of GNU CC. 7 8 GNU CC is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2, or (at your option) 11 any later version. 12 13 GNU CC is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GNU CC; see the file COPYING. If not, write to 20 the Free Software Foundation, 59 Temple Place - Suite 330, 21 Boston, MA 02111-1307, USA. */ 22 23 #ifndef GCC_D30V_H 24 25 /* D30V specific macros */ 26 27 /* Align an address */ 28 #define D30V_ALIGN(addr,align) (((addr) + (align) - 1) & ~((align) - 1)) 29 30 31 /* Driver configuration */ 32 33 /* Defined in svr4.h. */ 34 /* #define SWITCH_TAKES_ARG(CHAR) */ 35 36 /* Defined in svr4.h. */ 37 /* #define WORD_SWITCH_TAKES_ARG(NAME) */ 38 39 /* Defined in svr4.h. */ 40 #undef ASM_SPEC 41 #define ASM_SPEC "\ 42 %{!mno-asm-optimize: %{O*: %{!O0: -O} %{O0: %{masm-optimize: -O}}}} \ 43 %{v} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}" 44 45 /* Defined in svr4.h. */ 46 /* #define ASM_FINAL_SPEC "" */ 47 48 /* Defined in svr4.h. */ 49 #undef LINK_SPEC 50 #define LINK_SPEC "\ 51 %{h*} %{v:-V} \ 52 %{b} %{Wl,*:%*} \ 53 %{static:-dn -Bstatic} \ 54 %{shared:-G -dy -z text} \ 55 %{symbolic:-Bsymbolic -G -dy -z text} \ 56 %{G:-G} \ 57 %{YP,*} \ 58 %{Qy:} %{!Qn:-Qy} \ 59 %{mextmem: -m d30v_e} %{mextmemory: -m d30v_e} %{monchip: -m d30v_o}" 60 61 /* Defined in svr4.h. */ 62 #undef LIB_SPEC 63 #define LIB_SPEC "--start-group -lsim -lc --end-group" 64 65 /* Defined in svr4.h. */ 66 #undef STARTFILE_SPEC 67 #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s" 68 69 /* Defined in svr4.h. */ 70 #undef ENDFILE_SPEC 71 #define ENDFILE_SPEC "crtend%O%s" 72 73 /* Defined in svr4.h for host compilers. */ 74 /* #define MD_EXEC_PREFIX "" */ 75 76 /* Defined in svr4.h for host compilers. */ 77 /* #define MD_STARTFILE_PREFIX "" */ 78 79 80 /* Run-time target specifications */ 81 82 #define TARGET_CPU_CPP_BUILTINS() \ 83 do \ 84 { \ 85 builtin_define ("__D30V__"); \ 86 builtin_assert ("machine=d30v"); \ 87 } \ 88 while (0) 89 90 /* This declaration should be present. */ 91 extern int target_flags; 92 93 #define MASK_NO_COND_MOVE 0x00000001 /* disable conditional moves */ 94 95 #define MASK_DEBUG_ARG 0x10000000 /* debug argument handling */ 96 #define MASK_DEBUG_STACK 0x20000000 /* debug stack allocations */ 97 #define MASK_DEBUG_ADDR 0x40000000 /* debug GO_IF_LEGITIMATE_ADDRESS */ 98 99 #define TARGET_NO_COND_MOVE (target_flags & MASK_NO_COND_MOVE) 100 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG) 101 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK) 102 #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR) 103 104 #define TARGET_COND_MOVE (! TARGET_NO_COND_MOVE) 105 106 /* Default switches used. */ 107 #ifndef TARGET_DEFAULT 108 #define TARGET_DEFAULT 0 109 #endif 110 111 #define TARGET_SWITCHES \ 112 { \ 113 { "cond-move", -MASK_NO_COND_MOVE, \ 114 N_("Enable use of conditional move instructions") }, \ 115 \ 116 { "no-cond-move", MASK_NO_COND_MOVE, \ 117 N_("Disable use of conditional move instructions") }, \ 118 \ 119 { "debug-arg", MASK_DEBUG_ARG, \ 120 N_("Debug argument support in compiler") }, \ 121 \ 122 { "debug-stack", MASK_DEBUG_STACK, \ 123 N_("Debug stack support in compiler") }, \ 124 \ 125 { "debug-addr", MASK_DEBUG_ADDR, \ 126 N_("Debug memory address support in compiler") }, \ 127 \ 128 { "asm-optimize", 0, \ 129 N_("Make adjacent short instructions parallel if possible") }, \ 130 \ 131 { "no-asm-optimize", 0, \ 132 N_("Do not make adjacent short instructions parallel") }, \ 133 \ 134 { "extmem", 0, \ 135 N_("Link programs/data to be in external memory by default") }, \ 136 \ 137 { "extmemory", 0, \ 138 N_("Link programs/data to be in external memory by default") }, \ 139 \ 140 { "onchip", 0, \ 141 N_("Link programs/data to be in onchip memory by default") }, \ 142 \ 143 { "", TARGET_DEFAULT, "" }, \ 144 } 145 146 #define TARGET_OPTIONS \ 147 { \ 148 {"branch-cost=", &d30v_branch_cost_string, \ 149 N_("Change the branch costs within the compiler") }, \ 150 \ 151 {"cond-exec=", &d30v_cond_exec_string, \ 152 N_("Change the threshold for conversion to conditional execution") }, \ 153 } 154 155 #define TARGET_VERSION fprintf (stderr, " d30v") 156 157 #define OVERRIDE_OPTIONS override_options () 158 159 #define CAN_DEBUG_WITHOUT_FP 160 161 162 /* Storage Layout */ 163 164 #define BITS_BIG_ENDIAN 1 165 166 #define BYTES_BIG_ENDIAN 1 167 168 #define WORDS_BIG_ENDIAN 1 169 170 #define UNITS_PER_WORD 4 171 172 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 173 do { \ 174 if (GET_MODE_CLASS (MODE) == MODE_INT \ 175 && GET_MODE_SIZE (MODE) < 4) \ 176 (MODE) = SImode; \ 177 } while (0) 178 179 #define PARM_BOUNDARY 32 180 181 #define STACK_BOUNDARY 64 182 183 #define FUNCTION_BOUNDARY 64 184 185 #define BIGGEST_ALIGNMENT 64 186 187 /* Defined in svr4.h. */ 188 /* #define MAX_OFILE_ALIGNMENT */ 189 190 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 191 (TREE_CODE (TYPE) == ARRAY_TYPE \ 192 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ 193 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 194 195 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ 196 (TREE_CODE (EXP) == STRING_CST \ 197 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 198 199 #define STRICT_ALIGNMENT 1 200 201 /* Defined in svr4.h. */ 202 203 #define PCC_BITFIELD_TYPE_MATTERS 1 204 205 /* Layout of Source Language Data Types */ 206 207 #define INT_TYPE_SIZE 32 208 209 #define SHORT_TYPE_SIZE 16 210 211 #define LONG_TYPE_SIZE 32 212 213 #define LONG_LONG_TYPE_SIZE 64 214 215 #define FLOAT_TYPE_SIZE 32 216 217 #define DOUBLE_TYPE_SIZE 64 218 219 #define LONG_DOUBLE_TYPE_SIZE 64 220 221 #define DEFAULT_SIGNED_CHAR 1 222 223 /* Defined in svr4.h. */ 224 /* #define SIZE_TYPE */ 225 226 /* Defined in svr4.h. */ 227 /* #define PTRDIFF_TYPE */ 228 229 /* Defined in svr4.h. */ 230 /* #define WCHAR_TYPE */ 231 232 /* Defined in svr4.h. */ 233 /* #define WCHAR_TYPE_SIZE */ 234 235 236 /* D30V register layout. */ 237 238 /* Return true if a value is inside a range */ 239 #define IN_RANGE_P(VALUE, LOW, HIGH) \ 240 (((unsigned)((VALUE) - (LOW))) <= ((unsigned)((HIGH) - (LOW)))) 241 242 /* General purpose registers. */ 243 #define GPR_FIRST 0 /* First gpr */ 244 #define GPR_LAST (GPR_FIRST + 63) /* Last gpr */ 245 #define GPR_R0 GPR_FIRST /* R0, constant 0 */ 246 #define GPR_ARG_FIRST (GPR_FIRST + 2) /* R2, first argument reg */ 247 #define GPR_ARG_LAST (GPR_FIRST + 17) /* R17, last argument reg */ 248 #define GPR_RET_VALUE GPR_ARG_FIRST /* R2, function return reg */ 249 #define GPR_ATMP_FIRST (GPR_FIRST + 20) /* R20, tmp to save accs */ 250 #define GPR_ATMP_LAST (GPR_FIRST + 21) /* R21, tmp to save accs */ 251 #define GPR_STACK_TMP (GPR_FIRST + 22) /* R22, tmp for saving stack */ 252 #define GPR_RES_FIRST (GPR_FIRST + 32) /* R32, first reserved reg */ 253 #define GPR_RES_LAST (GPR_FIRST + 35) /* R35, last reserved reg */ 254 #define GPR_FP (GPR_FIRST + 61) /* Frame pointer */ 255 #define GPR_LINK (GPR_FIRST + 62) /* Return address register */ 256 #define GPR_SP (GPR_FIRST + 63) /* Stack pointer */ 257 258 /* Argument register that is eliminated in favor of the frame and/or stack 259 pointer. Also add register to point to where the return address is 260 stored. */ 261 #define SPECIAL_REG_FIRST (GPR_LAST + 1) 262 #define SPECIAL_REG_LAST (SPECIAL_REG_FIRST) 263 #define ARG_POINTER_REGNUM (SPECIAL_REG_FIRST + 0) 264 #define SPECIAL_REG_P(R) ((R) == SPECIAL_REG_FIRST) 265 266 #define GPR_OR_SPECIAL_REG_P(R) IN_RANGE_P (R, GPR_FIRST, SPECIAL_REG_LAST) 267 #define GPR_P(R) IN_RANGE_P (R, GPR_FIRST, GPR_LAST) 268 #define GPR_OR_PSEUDO_P(R) (GPR_OR_SPECIAL_REG_P (R) \ 269 || (R) >= FIRST_PSEUDO_REGISTER) 270 271 /* Flag bits. */ 272 #define FLAG_FIRST (SPECIAL_REG_LAST + 1) /* First flag */ 273 #define FLAG_LAST (FLAG_FIRST + 7) /* Last flag */ 274 #define FLAG_F0 (FLAG_FIRST) /* F0, used in prediction */ 275 #define FLAG_F1 (FLAG_FIRST + 1) /* F1, used in prediction */ 276 #define FLAG_F2 (FLAG_FIRST + 2) /* F2, general flag */ 277 #define FLAG_F3 (FLAG_FIRST + 3) /* F3, general flag */ 278 #define FLAG_SAT (FLAG_FIRST + 4) /* F4, saturation flag */ 279 #define FLAG_OVERFLOW (FLAG_FIRST + 5) /* F5, overflow flag */ 280 #define FLAG_ACC_OVER (FLAG_FIRST + 6) /* F6, accumulated overflow */ 281 #define FLAG_CARRY (FLAG_FIRST + 7) /* F7, carry/borrow flag */ 282 #define FLAG_BORROW FLAG_CARRY 283 284 #define FLAG_P(R) IN_RANGE_P (R, FLAG_FIRST, FLAG_LAST) 285 #define FLAG_OR_PSEUDO_P(R) (FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER) 286 287 #define BR_FLAG_P(R) IN_RANGE_P (R, FLAG_F0, FLAG_F1) 288 #define BR_FLAG_OR_PSEUDO_P(R) (BR_FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER) 289 290 /* Accumulators */ 291 #define ACCUM_FIRST (FLAG_LAST + 1) /* First accumulator */ 292 #define ACCUM_A0 ACCUM_FIRST /* Register A0 */ 293 #define ACCUM_A1 (ACCUM_FIRST + 1) /* Register A1 */ 294 #define ACCUM_LAST (ACCUM_FIRST + 1) /* Last accumulator */ 295 296 #define ACCUM_P(R) IN_RANGE_P (R, ACCUM_FIRST, ACCUM_LAST) 297 #define ACCUM_OR_PSEUDO_P(R) (ACCUM_P (R) || (R) >= FIRST_PSEUDO_REGISTER) 298 299 /* Special registers. Note, we only define the registers that can actually 300 be used. */ 301 #define CR_FIRST (ACCUM_LAST + 1) /* First CR */ 302 #define CR_LAST (CR_FIRST + 14) /* Last CR */ 303 #define CR_PSW (CR_FIRST + 0) /* CR0, Program status word */ 304 #define CR_BPSW (CR_FIRST + 1) /* CR1, Backup PSW */ 305 #define CR_PC (CR_FIRST + 2) /* CR2, Program counter */ 306 #define CR_BPC (CR_FIRST + 3) /* CR3, Backup PC */ 307 #define CR_DPSW (CR_FIRST + 4) /* CR4, Debug PSW */ 308 #define CR_DPC (CR_FIRST + 5) /* CR5, Debug PC */ 309 #define CR_RPT_C (CR_FIRST + 6) /* CR7, loop count register */ 310 #define CR_RPT_S (CR_FIRST + 7) /* CR8, loop start address */ 311 #define CR_RPT_E (CR_FIRST + 8) /* CR9, loop end address */ 312 #define CR_MOD_S (CR_FIRST + 9) /* CR10, modulo address start*/ 313 #define CR_MOD_E (CR_FIRST + 10) /* CR11, modulo address */ 314 #define CR_IBA (CR_FIRST + 11) /* CR14, Interrupt break addr */ 315 #define CR_EIT_VB (CR_FIRST + 12) /* CR15, EIT vector address */ 316 #define CR_INT_S (CR_FIRST + 13) /* CR16, Interrupt status */ 317 #define CR_INT_M (CR_FIRST + 14) /* CR17, Interrupt mask */ 318 319 #define CR_P(R) IN_RANGE_P (R, CR_FIRST, CR_LAST) 320 #define CR_OR_PSEUDO_P(R) (CR_P (R) || (R) >= FIRST_PSEUDO_REGISTER) 321 322 323 /* Register Basics */ 324 325 /* Number of hardware registers known to the compiler. They receive numbers 0 326 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number 327 really is assigned the number `FIRST_PSEUDO_REGISTER'. */ 328 #define FIRST_PSEUDO_REGISTER (CR_LAST + 1) 329 330 /* An initializer that says which registers are used for fixed purposes all 331 throughout the compiled code and are therefore not available for general 332 allocation. These would include the stack pointer, the frame pointer 333 (except on machines where that can be used as a general register when no 334 frame pointer is needed), the program counter on machines where that is 335 considered one of the addressable registers, and any other numbered register 336 with a standard use. 337 338 This information is expressed as a sequence of numbers, separated by commas 339 and surrounded by braces. The Nth number is 1 if register N is fixed, 0 340 otherwise. 341 342 The table initialized from this macro, and the table initialized by the 343 following one, may be overridden at run time either automatically, by the 344 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the 345 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */ 346 #define FIXED_REGISTERS \ 347 { \ 348 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R15 */ \ 349 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \ 350 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \ 351 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \ 352 1, /* ARG ptr */ \ 353 0, 0, 0, 0, 1, 1, 1, 1, /* F0 - F7 */ \ 354 0, 0, /* A0 - A1 */ \ 355 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \ 356 } 357 358 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in 359 general) by function calls as well as for fixed registers. This macro 360 therefore identifies the registers that are not available for general 361 allocation of values that must live across function calls. 362 363 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically 364 saves it on function entry and restores it on function exit, if the register 365 is used within the function. */ 366 #define CALL_USED_REGISTERS \ 367 { \ 368 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R15 */ \ 369 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \ 370 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \ 371 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \ 372 1, /* ARG ptr */ \ 373 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - F7 */ \ 374 1, 0, /* A0 - A1 */ \ 375 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \ 376 } 377 378 /* Zero or more C statements that may conditionally modify two variables 379 `fixed_regs' and `call_used_regs' (both of type `char []') after they have 380 been initialized from the two preceding macros. 381 382 This is necessary in case the fixed or call-clobbered registers depend on 383 target flags. 384 385 You need not define this macro if it has no work to do. 386 387 If the usage of an entire class of registers depends on the target flags, 388 you may indicate this to GCC by using this macro to modify `fixed_regs' and 389 `call_used_regs' to 1 for each of the registers in the classes which should 390 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return 391 `NO_REGS' if it is called with a letter for a class that shouldn't be used. 392 393 (However, if this class is not included in `GENERAL_REGS' and all of the 394 insn patterns whose constraints permit this class are controlled by target 395 switches, then GCC will automatically avoid using these registers when the 396 target switches are opposed to them.) */ 397 /* #define CONDITIONAL_REGISTER_USAGE */ 398 399 /* If this macro is defined and has a nonzero value, it means that `setjmp' and 400 related functions fail to save the registers, or that `longjmp' fails to 401 restore them. To compensate, the compiler avoids putting variables in 402 registers in functions that use `setjmp'. */ 403 /* #define NON_SAVING_SETJMP */ 404 405 /* Define this macro if the target machine has register windows. This C 406 expression returns the register number as seen by the called function 407 corresponding to the register number OUT as seen by the calling function. 408 Return OUT if register number OUT is not an outbound register. */ 409 /* #define INCOMING_REGNO(OUT) */ 410 411 /* Define this macro if the target machine has register windows. This C 412 expression returns the register number as seen by the calling function 413 corresponding to the register number IN as seen by the called function. 414 Return IN if register number IN is not an inbound register. */ 415 /* #define OUTGOING_REGNO(IN) */ 416 417 418 /* Order of allocation of registers */ 419 420 /* If defined, an initializer for a vector of integers, containing the numbers 421 of hard registers in the order in which GNU CC should prefer to use them 422 (from most preferred to least). 423 424 If this macro is not defined, registers are used lowest numbered first (all 425 else being equal). 426 427 One use of this macro is on machines where the highest numbered registers 428 must always be saved and the save-multiple-registers instruction supports 429 only sequences of consecutive registers. On such machines, define 430 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered 431 allocatable register first. */ 432 433 #define REG_ALLOC_ORDER \ 434 { \ 435 /* volatile registers */ \ 436 GPR_FIRST + 2, GPR_FIRST + 3, GPR_FIRST + 4, GPR_FIRST + 5, \ 437 GPR_FIRST + 6, GPR_FIRST + 7, GPR_FIRST + 8, GPR_FIRST + 9, \ 438 GPR_FIRST + 10, GPR_FIRST + 11, GPR_FIRST + 12, GPR_FIRST + 13, \ 439 GPR_FIRST + 14, GPR_FIRST + 15, GPR_FIRST + 16, GPR_FIRST + 17, \ 440 GPR_FIRST + 18, GPR_FIRST + 19, GPR_FIRST + 20, GPR_FIRST + 21, \ 441 GPR_FIRST + 22, GPR_FIRST + 23, GPR_FIRST + 24, GPR_FIRST + 25, \ 442 GPR_FIRST + 1, \ 443 \ 444 /* saved registers */ \ 445 GPR_FIRST + 34, GPR_FIRST + 35, GPR_FIRST + 36, GPR_FIRST + 37, \ 446 GPR_FIRST + 38, GPR_FIRST + 39, GPR_FIRST + 40, GPR_FIRST + 41, \ 447 GPR_FIRST + 42, GPR_FIRST + 43, GPR_FIRST + 44, GPR_FIRST + 45, \ 448 GPR_FIRST + 46, GPR_FIRST + 47, GPR_FIRST + 48, GPR_FIRST + 49, \ 449 GPR_FIRST + 50, GPR_FIRST + 51, GPR_FIRST + 52, GPR_FIRST + 53, \ 450 GPR_FIRST + 54, GPR_FIRST + 55, GPR_FIRST + 56, GPR_FIRST + 57, \ 451 GPR_FIRST + 58, GPR_FIRST + 59, GPR_FIRST + 60, GPR_FIRST + 61, \ 452 GPR_FIRST + 62, \ 453 \ 454 /* flags */ \ 455 FLAG_F2, FLAG_F3, FLAG_F0, FLAG_F1, \ 456 FLAG_SAT, FLAG_OVERFLOW, FLAG_ACC_OVER, FLAG_CARRY, \ 457 \ 458 /* accumultors */ \ 459 ACCUM_FIRST + 0, ACCUM_FIRST + 1, \ 460 \ 461 /* fixed registers */ \ 462 GPR_FIRST + 0, GPR_FIRST + 26, GPR_FIRST + 27, GPR_FIRST + 28, \ 463 GPR_FIRST + 29, GPR_FIRST + 30, GPR_FIRST + 31, GPR_FIRST + 32, \ 464 GPR_FIRST + 33, GPR_FIRST + 63, \ 465 CR_PSW, CR_BPSW, CR_PC, CR_BPC, \ 466 CR_DPSW, CR_DPC, CR_RPT_C, CR_RPT_S, \ 467 CR_RPT_E, CR_MOD_S, CR_MOD_E, CR_IBA, \ 468 CR_EIT_VB, CR_INT_S, CR_INT_M, \ 469 ARG_POINTER_REGNUM, \ 470 } 471 472 /* A C statement (sans semicolon) to choose the order in which to allocate hard 473 registers for pseudo-registers local to a basic block. 474 475 Store the desired register order in the array `reg_alloc_order'. Element 0 476 should be the register to allocate first; element 1, the next register; and 477 so on. 478 479 The macro body should not assume anything about the contents of 480 `reg_alloc_order' before execution of the macro. 481 482 On most machines, it is not necessary to define this macro. */ 483 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */ 484 485 486 /* How Values Fit in Registers */ 487 488 /* A C expression for the number of consecutive hard registers, starting at 489 register number REGNO, required to hold a value of mode MODE. 490 491 On a machine where all registers are exactly one word, a suitable definition 492 of this macro is 493 494 #define HARD_REGNO_NREGS(REGNO, MODE) \ 495 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \ 496 / UNITS_PER_WORD)) */ 497 498 #define HARD_REGNO_NREGS(REGNO, MODE) \ 499 (ACCUM_P (REGNO) ? ((GET_MODE_SIZE (MODE) + 2*UNITS_PER_WORD - 1) \ 500 / (2*UNITS_PER_WORD)) \ 501 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \ 502 / UNITS_PER_WORD)) 503 504 /* A C expression that is nonzero if it is permissible to store a value of mode 505 MODE in hard register number REGNO (or in several registers starting with 506 that one). For a machine where all registers are equivalent, a suitable 507 definition is 508 509 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1 510 511 It is not necessary for this macro to check for the numbers of fixed 512 registers, because the allocation mechanism considers them to be always 513 occupied. 514 515 On some machines, double-precision values must be kept in even/odd register 516 pairs. The way to implement that is to define this macro to reject odd 517 register numbers for such modes. 518 519 The minimum requirement for a mode to be OK in a register is that the 520 `movMODE' instruction pattern support moves between the register and any 521 other hard register for which the mode is OK; and that moving a value into 522 the register and back out not alter it. 523 524 Since the same instruction used to move `SImode' will work for all narrower 525 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK' 526 to distinguish between these modes, provided you define patterns `movhi', 527 etc., to take advantage of this. This is useful because of the interaction 528 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for 529 all integer modes to be tieable. 530 531 Many machines have special registers for floating point arithmetic. Often 532 people assume that floating point machine modes are allowed only in floating 533 point registers. This is not true. Any registers that can hold integers 534 can safely *hold* a floating point machine mode, whether or not floating 535 arithmetic can be done on it in those registers. Integer move instructions 536 can be used to move the values. 537 538 On some machines, though, the converse is true: fixed-point machine modes 539 may not go in floating registers. This is true if the floating registers 540 normalize any value stored in them, because storing a non-floating value 541 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject 542 fixed-point machine modes in floating registers. But if the floating 543 registers do not automatically normalize, if you can store any bit pattern 544 in one and retrieve it unchanged without a trap, then any machine mode may 545 go in a floating register, so you can define this macro to say so. 546 547 The primary significance of special floating registers is rather that they 548 are the registers acceptable in floating point arithmetic instructions. 549 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by 550 writing the proper constraints for those instructions. 551 552 On some machines, the floating registers are especially slow to access, so 553 that it is better to store a value in a stack frame than in such a register 554 if floating point arithmetic is not being done. As long as the floating 555 registers are not in class `GENERAL_REGS', they will not be used unless some 556 pattern's constraint asks for one. */ 557 558 extern unsigned char hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER]; 559 #define HARD_REGNO_MODE_OK(REGNO, MODE) hard_regno_mode_ok[ (int)MODE ][ REGNO ] 560 561 /* A C expression that is nonzero if it is desirable to choose register 562 allocation so as to avoid move instructions between a value of mode MODE1 563 and a value of mode MODE2. 564 565 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are 566 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be 567 zero. */ 568 569 extern unsigned char modes_tieable_p[]; 570 #define MODES_TIEABLE_P(MODE1, MODE2) \ 571 modes_tieable_p[ (((int)(MODE1)) * (NUM_MACHINE_MODES)) + (int)(MODE2) ] 572 573 /* Define this macro if the compiler should avoid copies to/from CCmode 574 registers. You should only define this macro if support fo copying to/from 575 CCmode is incomplete. */ 576 577 /* On the D30V, copying to/from CCmode is complete, but since there are only 578 two CC registers usable for conditional tests, this helps gcse not compound 579 the reload problem. */ 580 #define AVOID_CCMODE_COPIES 581 582 583 /* Handling Leaf Functions */ 584 585 /* A C initializer for a vector, indexed by hard register number, which 586 contains 1 for a register that is allowable in a candidate for leaf function 587 treatment. 588 589 If leaf function treatment involves renumbering the registers, then the 590 registers marked here should be the ones before renumbering--those that GNU 591 CC would ordinarily allocate. The registers which will actually be used in 592 the assembler code, after renumbering, should not be marked with 1 in this 593 vector. 594 595 Define this macro only if the target machine offers a way to optimize the 596 treatment of leaf functions. */ 597 /* #define LEAF_REGISTERS */ 598 599 /* A C expression whose value is the register number to which REGNO should be 600 renumbered, when a function is treated as a leaf function. 601 602 If REGNO is a register number which should not appear in a leaf function 603 before renumbering, then the expression should yield -1, which will cause 604 the compiler to abort. 605 606 Define this macro only if the target machine offers a way to optimize the 607 treatment of leaf functions, and registers need to be renumbered to do this. */ 608 /* #define LEAF_REG_REMAP(REGNO) */ 609 610 611 /* Register Classes */ 612 613 /* An enumeral type that must be defined with all the register class names as 614 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last 615 register class, followed by one more enumeral value, `LIM_REG_CLASSES', 616 which is not a register class but rather tells how many classes there are. 617 618 Each register class has a number, which is the value of casting the class 619 name to type `int'. The number serves as an index in many of the tables 620 described below. */ 621 enum reg_class 622 { 623 NO_REGS, 624 REPEAT_REGS, 625 CR_REGS, 626 ACCUM_REGS, 627 OTHER_FLAG_REGS, 628 F0_REGS, 629 F1_REGS, 630 BR_FLAG_REGS, 631 FLAG_REGS, 632 EVEN_REGS, 633 GPR_REGS, 634 ALL_REGS, 635 LIM_REG_CLASSES 636 }; 637 638 #define GENERAL_REGS GPR_REGS 639 640 /* The number of distinct register classes, defined as follows: 641 642 #define N_REG_CLASSES (int) LIM_REG_CLASSES */ 643 #define N_REG_CLASSES ((int) LIM_REG_CLASSES) 644 645 /* An initializer containing the names of the register classes as C string 646 constants. These names are used in writing some of the debugging dumps. */ 647 #define REG_CLASS_NAMES \ 648 { \ 649 "NO_REGS", \ 650 "REPEAT_REGS", \ 651 "CR_REGS", \ 652 "ACCUM_REGS", \ 653 "OTHER_FLAG_REGS", \ 654 "F0_REGS", \ 655 "F1_REGS", \ 656 "BR_FLAG_REGS", \ 657 "FLAG_REGS", \ 658 "EVEN_REGS", \ 659 "GPR_REGS", \ 660 "ALL_REGS", \ 661 } 662 663 /* Create mask bits for 3rd word of REG_CLASS_CONTENTS */ 664 #define MASK_WORD3(REG) ((long)1 << ((REG) - 64)) 665 666 #define NO_MASK 0 667 #define REPEAT_MASK MASK_WORD3 (CR_RPT_C) 668 #define CR_MASK (MASK_WORD3 (CR_PSW) | MASK_WORD3 (CR_BPSW) \ 669 | MASK_WORD3 (CR_PC) | MASK_WORD3 (CR_BPC) \ 670 | MASK_WORD3 (CR_DPSW) | MASK_WORD3 (CR_DPC) \ 671 | MASK_WORD3 (CR_RPT_C) | MASK_WORD3 (CR_RPT_S) \ 672 | MASK_WORD3 (CR_RPT_E) | MASK_WORD3 (CR_MOD_S) \ 673 | MASK_WORD3 (CR_MOD_E) | MASK_WORD3 (CR_IBA) \ 674 | MASK_WORD3 (CR_EIT_VB) | MASK_WORD3 (CR_INT_S) \ 675 | MASK_WORD3 (CR_INT_M)) 676 677 #define ACCUM_MASK (MASK_WORD3 (ACCUM_A0) | MASK_WORD3 (ACCUM_A1)) 678 #define OTHER_FLAG_MASK (MASK_WORD3 (FLAG_F2) | MASK_WORD3 (FLAG_F3) \ 679 | MASK_WORD3 (FLAG_SAT) | MASK_WORD3 (FLAG_OVERFLOW) \ 680 | MASK_WORD3 (FLAG_ACC_OVER) | MASK_WORD3 (FLAG_CARRY)) 681 682 #define F0_MASK MASK_WORD3 (FLAG_F0) 683 #define F1_MASK MASK_WORD3 (FLAG_F1) 684 #define BR_FLAG_MASK (F0_MASK | F1_MASK) 685 #define FLAG_MASK (BR_FLAG_MASK | OTHER_FLAG_MASK) 686 #define SPECIAL_MASK MASK_WORD3 (ARG_POINTER_REGNUM) 687 688 #define ALL_MASK (CR_MASK | ACCUM_MASK | FLAG_MASK | SPECIAL_MASK) 689 690 /* An initializer containing the contents of the register classes, as integers 691 which are bit masks. The Nth integer specifies the contents of class N. 692 The way the integer MASK is interpreted is that register R is in the class 693 if `MASK & (1 << R)' is 1. 694 695 When the machine has more than 32 registers, an integer does not suffice. 696 Then the integers are replaced by sub-initializers, braced groupings 697 containing several integers. Each sub-initializer must be suitable as an 698 initializer for the type `HARD_REG_SET' which is defined in 699 `hard-reg-set.h'. */ 700 #define REG_CLASS_CONTENTS \ 701 { \ 702 { 0x00000000, 0x00000000, NO_MASK }, /* NO_REGS */ \ 703 { 0x00000000, 0x00000000, REPEAT_MASK }, /* REPEAT_REGS */ \ 704 { 0x00000000, 0x00000000, CR_MASK }, /* CR_REGS */ \ 705 { 0x00000000, 0x00000000, ACCUM_MASK }, /* ACCUM_REGS */ \ 706 { 0x00000000, 0x00000000, OTHER_FLAG_MASK }, /* OTHER_FLAG_REGS */ \ 707 { 0x00000000, 0x00000000, F0_MASK }, /* F0_REGS */ \ 708 { 0x00000000, 0x00000000, F1_MASK }, /* F1_REGS */ \ 709 { 0x00000000, 0x00000000, BR_FLAG_MASK }, /* BR_FLAG_REGS */ \ 710 { 0x00000000, 0x00000000, FLAG_MASK }, /* FLAG_REGS */ \ 711 { 0xfffffffc, 0x3fffffff, NO_MASK }, /* EVEN_REGS */ \ 712 { 0xffffffff, 0xffffffff, SPECIAL_MASK }, /* GPR_REGS */ \ 713 { 0xffffffff, 0xffffffff, ALL_MASK }, /* ALL_REGS */ \ 714 } 715 716 /* A C expression whose value is a register class containing hard register 717 REGNO. In general there is more than one such class; choose a class which 718 is "minimal", meaning that no smaller class also contains the register. */ 719 720 extern enum reg_class regno_reg_class[FIRST_PSEUDO_REGISTER]; 721 #define REGNO_REG_CLASS(REGNO) regno_reg_class[ (REGNO) ] 722 723 /* A macro whose definition is the name of the class to which a valid base 724 register must belong. A base register is one used in an address which is 725 the register value plus a displacement. */ 726 #define BASE_REG_CLASS GPR_REGS 727 728 /* A macro whose definition is the name of the class to which a valid index 729 register must belong. An index register is one used in an address where its 730 value is either multiplied by a scale factor or added to another register 731 (as well as added to a displacement). */ 732 #define INDEX_REG_CLASS GPR_REGS 733 734 /* A C expression which defines the machine-dependent operand constraint 735 letters for register classes. If CHAR is such a letter, the value should be 736 the register class corresponding to it. Otherwise, the value should be 737 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS', 738 will not be passed to this macro; you do not need to handle it. 739 740 The following letters are unavailable, due to being used as 741 constraints: 742 '0'..'9' 743 '<', '>' 744 'E', 'F', 'G', 'H' 745 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P' 746 'Q', 'R', 'S', 'T', 'U' 747 'V', 'X' 748 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */ 749 750 extern enum reg_class reg_class_from_letter[256]; 751 #define REG_CLASS_FROM_LETTER(CHAR) reg_class_from_letter[(unsigned char)(CHAR)] 752 753 /* A C expression which is nonzero if register number NUM is suitable for use 754 as a base register in operand addresses. It may be either a suitable hard 755 register or a pseudo register that has been allocated such a hard register. */ 756 757 #define REGNO_OK_FOR_BASE_P(NUM) \ 758 ((NUM) < FIRST_PSEUDO_REGISTER \ 759 ? GPR_P (NUM) \ 760 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM]))) 761 762 763 /* A C expression which is nonzero if register number NUM is suitable for use 764 as an index register in operand addresses. It may be either a suitable hard 765 register or a pseudo register that has been allocated such a hard register. 766 767 The difference between an index register and a base register is that the 768 index register may be scaled. If an address involves the sum of two 769 registers, neither one of them scaled, then either one may be labeled the 770 "base" and the other the "index"; but whichever labeling is used must fit 771 the machine's constraints of which registers may serve in each capacity. 772 The compiler will try both labelings, looking for one that is valid, and 773 will reload one or both registers only if neither labeling works. */ 774 775 #define REGNO_OK_FOR_INDEX_P(NUM) \ 776 ((NUM) < FIRST_PSEUDO_REGISTER \ 777 ? GPR_P (NUM) \ 778 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM]))) 779 780 /* A C expression that places additional restrictions on the register class to 781 use when it is necessary to copy value X into a register in class CLASS. 782 The value is a register class; perhaps CLASS, or perhaps another, smaller 783 class. On many machines, the following definition is safe: 784 785 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS 786 787 Sometimes returning a more restrictive class makes better code. For 788 example, on the 68000, when X is an integer constant that is in range for a 789 `moveq' instruction, the value of this macro is always `DATA_REGS' as long 790 as CLASS includes the data registers. Requiring a data register guarantees 791 that a `moveq' will be used. 792 793 If X is a `const_double', by returning `NO_REGS' you can force X into a 794 memory constant. This is useful on certain machines where immediate 795 floating values cannot be loaded into certain kinds of registers. */ 796 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS 797 798 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input 799 reloads. If you don't define this macro, the default is to use CLASS, 800 unchanged. */ 801 /* #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) */ 802 803 /* A C expression that places additional restrictions on the register class to 804 use when it is necessary to be able to hold a value of mode MODE in a reload 805 register for which class CLASS would ordinarily be used. 806 807 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are 808 certain modes that simply can't go in certain reload classes. 809 810 The value is a register class; perhaps CLASS, or perhaps another, smaller 811 class. 812 813 Don't define this macro unless the target machine has limitations which 814 require the macro to do something nontrivial. */ 815 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */ 816 817 /* Many machines have some registers that cannot be copied directly to or from 818 memory or even from other types of registers. An example is the `MQ' 819 register, which on most machines, can only be copied to or from general 820 registers, but not memory. Some machines allow copying all registers to and 821 from memory, but require a scratch register for stores to some memory 822 locations (e.g., those with symbolic address on the RT, and those with 823 certain symbolic address on the SPARC when compiling PIC). In some cases, 824 both an intermediate and a scratch register are required. 825 826 You should define these macros to indicate to the reload phase that it may 827 need to allocate at least one register for a reload in addition to the 828 register to contain the data. Specifically, if copying X to a register 829 CLASS in MODE requires an intermediate register, you should define 830 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of 831 whose registers can be used as intermediate registers or scratch registers. 832 833 If copying a register CLASS in MODE to X requires an intermediate or scratch 834 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the 835 largest register class required. If the requirements for input and output 836 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used 837 instead of defining both macros identically. 838 839 The values returned by these macros are often `GENERAL_REGS'. Return 840 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied 841 to or from a register of CLASS in MODE without requiring a scratch register. 842 Do not define this macro if it would always return `NO_REGS'. 843 844 If a scratch register is required (either with or without an intermediate 845 register), you should define patterns for `reload_inM' or `reload_outM', as 846 required (*note Standard Names::.. These patterns, which will normally be 847 implemented with a `define_expand', should be similar to the `movM' 848 patterns, except that operand 2 is the scratch register. 849 850 Define constraints for the reload register and scratch register that contain 851 a single register class. If the original reload register (whose class is 852 CLASS) can meet the constraint given in the pattern, the value returned by 853 these macros is used for the class of the scratch register. Otherwise, two 854 additional reload registers are required. Their classes are obtained from 855 the constraints in the insn pattern. 856 857 X might be a pseudo-register or a `subreg' of a pseudo-register, which could 858 either be in a hard register or in memory. Use `true_regnum' to find out; 859 it will return -1 if the pseudo is in memory and the hard register number if 860 it is in a register. 861 862 These macros should not be used in the case where a particular class of 863 registers can only be copied to memory and not to another class of 864 registers. In that case, secondary reload registers are not needed and 865 would not be helpful. Instead, a stack location must be used to perform the 866 copy and the `movM' pattern should use memory as an intermediate storage. 867 This case often occurs between floating-point and general registers. */ 868 869 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \ 870 ((CLASS) == GPR_REGS ? NO_REGS \ 871 : (CLASS) == EVEN_REGS ? NO_REGS \ 872 : (CLASS) == ACCUM_REGS ? EVEN_REGS \ 873 : GPR_REGS) 874 875 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */ 876 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */ 877 878 /* Certain machines have the property that some registers cannot be copied to 879 some other registers without using memory. Define this macro on those 880 machines to be a C expression that is nonzero if objects of mode M in 881 registers of CLASS1 can only be copied to registers of class CLASS2 by 882 storing a register of CLASS1 into memory and loading that memory location 883 into a register of CLASS2. 884 885 Do not define this macro if its value would always be zero. */ 886 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */ 887 888 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a 889 stack slot for a memory location needed for register copies. If this macro 890 is defined, the compiler instead uses the memory location defined by this 891 macro. 892 893 Do not define this macro if you do not define 894 `SECONDARY_MEMORY_NEEDED'. */ 895 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */ 896 897 /* When the compiler needs a secondary memory location to copy between two 898 registers of mode MODE, it normally allocates sufficient memory to hold a 899 quantity of `BITS_PER_WORD' bits and performs the store and load operations 900 in a mode that many bits wide and whose class is the same as that of MODE. 901 902 This is right thing to do on most machines because it ensures that all bits 903 of the register are copied and prevents accesses to the registers in a 904 narrower mode, which some machines prohibit for floating-point registers. 905 906 However, this default behavior is not correct on some machines, such as the 907 DEC Alpha, that store short integers in floating-point registers differently 908 than in integer registers. On those machines, the default widening will not 909 work correctly and you must define this macro to suppress that widening in 910 some cases. See the file `alpha.h' for details. 911 912 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or 913 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for 914 your machine. */ 915 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */ 916 917 /* Normally the compiler avoids choosing registers that have been explicitly 918 mentioned in the rtl as spill registers (these registers are normally those 919 used to pass parameters and return values). However, some machines have so 920 few registers of certain classes that there would not be enough registers to 921 use as spill registers if this were done. 922 923 Define `SMALL_REGISTER_CLASSES' to be an expression with a nonzero value on 924 these machines. When this macro has a nonzero value, the compiler allows 925 registers explicitly used in the rtl to be used as spill registers but 926 avoids extending the lifetime of these registers. 927 928 It is always safe to define this macro with a nonzero value, but if you 929 unnecessarily define it, you will reduce the amount of optimizations that 930 can be performed in some cases. If you do not define this macro with a 931 nonzero value when it is required, the compiler will run out of spill 932 registers and print a fatal error message. For most machines, you should 933 not define this macro at all. */ 934 /* #define SMALL_REGISTER_CLASSES */ 935 936 /* A C expression whose value is nonzero if pseudos that have been assigned to 937 registers of class CLASS would likely be spilled because registers of CLASS 938 are needed for spill registers. 939 940 The default value of this macro returns 1 if CLASS has exactly one register 941 and zero otherwise. On most machines, this default should be used. Only 942 define this macro to some other expression if pseudo allocated by 943 `local-alloc.c' end up in memory because their hard registers were needed 944 for spill registers. If this macro returns nonzero for those classes, those 945 pseudos will only be allocated by `global.c', which knows how to reallocate 946 the pseudo to another register. If there would not be another register 947 available for reallocation, you should not change the definition of this 948 macro since the only effect of such a definition would be to slow down 949 register allocation. */ 950 #define CLASS_LIKELY_SPILLED_P(CLASS) \ 951 ((CLASS) != GPR_REGS && (CLASS) != EVEN_REGS) 952 953 /* A C expression for the maximum number of consecutive registers of 954 class CLASS needed to hold a value of mode MODE. 955 956 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value 957 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of 958 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS. 959 960 This macro helps control the handling of multiple-word values in 961 the reload pass. */ 962 963 #define CLASS_MAX_NREGS(CLASS, MODE) \ 964 (((CLASS) == ACCUM_REGS) \ 965 ? ((GET_MODE_SIZE (MODE) + 8 - 1) / 8) \ 966 : ((GET_MODE_SIZE (MODE) + 4 - 1) / 4)) 967 968 /* A C expression that defines the machine-dependent operand constraint letters 969 (`I', `J', `K', .. 'P') that specify particular ranges of integer values. 970 If C is one of those letters, the expression should check that VALUE, an 971 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C 972 is not one of those letters, the value should be 0 regardless of VALUE. */ 973 #define CONST_OK_FOR_LETTER_P(VALUE, C) \ 974 ((C) == 'I' ? IN_RANGE_P (VALUE, -32, 31) \ 975 : (C) == 'J' ? IN_RANGE_P (VALUE, 0, 31) \ 976 : (C) == 'K' ? IN_RANGE_P (exact_log2 (VALUE), 0, 31) \ 977 : (C) == 'L' ? IN_RANGE_P (exact_log2 (~ (VALUE)), 0, 31) \ 978 : (C) == 'M' ? ((VALUE) == 32) \ 979 : (C) == 'N' ? ((VALUE) == 1) \ 980 : (C) == 'O' ? ((VALUE) == 0) \ 981 : (C) == 'P' ? IN_RANGE_P (VALUE, 32, 63) \ 982 : FALSE) 983 984 /* A C expression that defines the machine-dependent operand constraint letters 985 (`G', `H') that specify particular ranges of `const_double' values. 986 987 If C is one of those letters, the expression should check that VALUE, an RTX 988 of code `const_double', is in the appropriate range and return 1 if so, 0 989 otherwise. If C is not one of those letters, the value should be 0 990 regardless of VALUE. 991 992 `const_double' is used for all floating-point constants and for `DImode' 993 fixed-point constants. A given letter can accept either or both kinds of 994 values. It can use `GET_MODE' to distinguish between these kinds. */ 995 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ 996 ((C) == 'G' ? (CONST_DOUBLE_LOW (VALUE) == 0 \ 997 && CONST_DOUBLE_HIGH (VALUE) == 0) \ 998 : (C) == 'H' ? FALSE \ 999 : FALSE) 1000 1001 /* A C expression that defines the optional machine-dependent constraint 1002 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific 1003 types of operands, usually memory references, for the target machine. 1004 Normally this macro will not be defined. If it is required for a particular 1005 target machine, it should return 1 if VALUE corresponds to the operand type 1006 represented by the constraint letter C. If C is not defined as an extra 1007 constraint, the value returned should be 0 regardless of VALUE. 1008 1009 For example, on the ROMP, load instructions cannot have their output in r0 1010 if the memory reference contains a symbolic address. Constraint letter `Q' 1011 is defined as representing a memory address that does *not* contain a 1012 symbolic address. An alternative is specified with a `Q' constraint on the 1013 input and `r' on the output. The next alternative specifies `m' on the 1014 input and a register class that does not include r0 on the output. */ 1015 1016 #define EXTRA_CONSTRAINT(VALUE, C) \ 1017 (((C) == 'Q') ? short_memory_operand ((VALUE), GET_MODE (VALUE)) \ 1018 : ((C) == 'R') ? single_reg_memory_operand ((VALUE), GET_MODE (VALUE)) \ 1019 : ((C) == 'S') ? const_addr_memory_operand ((VALUE), GET_MODE (VALUE)) \ 1020 : ((C) == 'T') ? long_memory_operand ((VALUE), GET_MODE (VALUE)) \ 1021 : ((C) == 'U') ? FALSE \ 1022 : FALSE) 1023 1024 1025 /* Basic Stack Layout */ 1026 1027 /* Stack layout */ 1028 1029 /* Structure used to define the d30v stack */ 1030 typedef struct d30v_stack { 1031 int varargs_p; /* whether this is a varargs function */ 1032 int varargs_size; /* size to hold varargs args passed in regs */ 1033 int vars_size; /* variable save area size */ 1034 int parm_size; /* outgoing parameter size */ 1035 int gpr_size; /* size of saved GPR registers */ 1036 int accum_size; /* size of saved ACCUM registers */ 1037 int total_size; /* total bytes allocated for stack */ 1038 /* which registers are to be saved */ 1039 int save_offset; /* offset from new sp to start saving vars at */ 1040 int link_offset; /* offset r62 is saved at */ 1041 int memrefs_varargs; /* # of 2 word memory references for varargs */ 1042 int memrefs_2words; /* # of 2 word memory references */ 1043 int memrefs_1word; /* # of 1 word memory references */ 1044 /* 1 for ldw/stw ops; 2 for ld2w/st2w ops */ 1045 unsigned char save_p[FIRST_PSEUDO_REGISTER]; 1046 } d30v_stack_t; 1047 1048 /* Define this macro if pushing a word onto the stack moves the stack pointer 1049 to a smaller address. 1050 1051 When we say, "define this macro if ...," it means that the compiler checks 1052 this macro only with `#ifdef' so the precise definition used does not 1053 matter. */ 1054 #define STACK_GROWS_DOWNWARD 1 1055 1056 /* Define this macro if the addresses of local variable slots are at negative 1057 offsets from the frame pointer. */ 1058 /* #define FRAME_GROWS_DOWNWARD */ 1059 1060 /* Define this macro if successive arguments to a function occupy decreasing 1061 addresses on the stack. */ 1062 /* #define ARGS_GROW_DOWNWARD */ 1063 1064 /* Offset from the frame pointer to the first local variable slot to be 1065 allocated. 1066 1067 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the 1068 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by 1069 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */ 1070 1071 #define STARTING_FRAME_OFFSET \ 1072 (D30V_ALIGN (current_function_outgoing_args_size, \ 1073 (STACK_BOUNDARY / BITS_PER_UNIT))) 1074 1075 /* Offset from the stack pointer register to the first location at which 1076 outgoing arguments are placed. If not specified, the default value of zero 1077 is used. This is the proper value for most machines. 1078 1079 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first 1080 location at which outgoing arguments are placed. */ 1081 /* #define STACK_POINTER_OFFSET */ 1082 1083 /* Offset from the argument pointer register to the first argument's address. 1084 On some machines it may depend on the data type of the function. 1085 1086 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first 1087 argument's address. */ 1088 #define FIRST_PARM_OFFSET(FUNDECL) 0 1089 1090 /* Offset from the stack pointer register to an item dynamically allocated on 1091 the stack, e.g., by `alloca'. 1092 1093 The default value for this macro is `STACK_POINTER_OFFSET' plus the length 1094 of the outgoing arguments. The default is correct for most machines. See 1095 `function.c' for details. */ 1096 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */ 1097 1098 /* A C expression whose value is RTL representing the address in a stack frame 1099 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is 1100 an RTL expression for the address of the stack frame itself. 1101 1102 If you don't define this macro, the default is to return the value of 1103 FRAMEADDR--that is, the stack frame address is also the address of the stack 1104 word that points to the previous frame. */ 1105 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */ 1106 1107 /* If defined, a C expression that produces the machine-specific code to setup 1108 the stack so that arbitrary frames can be accessed. For example, on the 1109 SPARC, we must flush all of the register windows to the stack before we can 1110 access arbitrary stack frames. This macro will seldom need to be defined. */ 1111 /* #define SETUP_FRAME_ADDRESSES() */ 1112 1113 /* A C expression whose value is RTL representing the value of the return 1114 address for the frame COUNT steps up from the current frame, after the 1115 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame 1116 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is 1117 defined. 1118 1119 The value of the expression must always be the correct address when COUNT is 1120 zero, but may be `NULL_RTX' if there is not way to determine the return 1121 address of other frames. */ 1122 1123 /* ??? This definition fails for leaf functions. There is currently no 1124 general solution for this problem. */ 1125 1126 /* ??? There appears to be no way to get the return address of any previous 1127 frame except by disassembling instructions in the prologue/epilogue. 1128 So currently we support only the current frame. */ 1129 1130 #define RETURN_ADDR_RTX(COUNT, FRAME) \ 1131 ((COUNT) == 0 ? d30v_return_addr() : const0_rtx) 1132 1133 /* Define this if the return address of a particular stack frame is 1134 accessed from the frame pointer of the previous stack frame. */ 1135 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */ 1136 1137 /* A C expression whose value is RTL representing the location of the incoming 1138 return address at the beginning of any function, before the prologue. This 1139 RTL is either a `REG', indicating that the return value is saved in `REG', 1140 or a `MEM' representing a location in the stack. 1141 1142 You only need to define this macro if you want to support call frame 1143 debugging information like that provided by DWARF 2. */ 1144 1145 /* Before the prologue, RA lives in r62. */ 1146 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, GPR_LINK) 1147 1148 /* A C expression whose value is an integer giving the offset, in bytes, from 1149 the value of the stack pointer register to the top of the stack frame at the 1150 beginning of any function, before the prologue. The top of the frame is 1151 defined to be the value of the stack pointer in the previous frame, just 1152 before the call instruction. 1153 1154 You only need to define this macro if you want to support call frame 1155 debugging information like that provided by DWARF 2. */ 1156 #define INCOMING_FRAME_SP_OFFSET 0 1157 1158 /* Initialize data used by insn expanders. This is called from insn_emit, 1159 once for every function before code is generated. */ 1160 1161 #define INIT_EXPANDERS d30v_init_expanders () 1162 1163 1164 /* Stack Checking. */ 1165 1166 /* A nonzero value if stack checking is done by the configuration files in a 1167 machine-dependent manner. You should define this macro if stack checking is 1168 require by the ABI of your machine or if you would like to have to stack 1169 checking in some more efficient way than GNU CC's portable approach. The 1170 default value of this macro is zero. */ 1171 /* #define STACK_CHECK_BUILTIN */ 1172 1173 /* An integer representing the interval at which GNU CC must generate stack 1174 probe instructions. You will normally define this macro to be no larger 1175 than the size of the "guard pages" at the end of a stack area. The default 1176 value of 4096 is suitable for most systems. */ 1177 /* #define STACK_CHECK_PROBE_INTERVAL */ 1178 1179 /* An integer which is nonzero if GNU CC should perform the stack probe as a 1180 load instruction and zero if GNU CC should use a store instruction. The 1181 default is zero, which is the most efficient choice on most systems. */ 1182 /* #define STACK_CHECK_PROBE_LOAD */ 1183 1184 /* The number of bytes of stack needed to recover from a stack overflow, for 1185 languages where such a recovery is supported. The default value of 75 words 1186 should be adequate for most machines. */ 1187 /* #define STACK_CHECK_PROTECT */ 1188 1189 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe 1190 instructions in non-leaf functions to ensure at least this many bytes of 1191 stack are available. If a stack frame is larger than this size, stack 1192 checking will not be reliable and GNU CC will issue a warning. The default 1193 is chosen so that GNU CC only generates one instruction on most systems. 1194 You should normally not change the default value of this macro. */ 1195 /* #define STACK_CHECK_MAX_FRAME_SIZE */ 1196 1197 /* GNU CC uses this value to generate the above warning message. It represents 1198 the amount of fixed frame used by a function, not including space for any 1199 callee-saved registers, temporaries and user variables. You need only 1200 specify an upper bound for this amount and will normally use the default of 1201 four words. */ 1202 /* #define STACK_CHECK_FIXED_FRAME_SIZE */ 1203 1204 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed 1205 area of the stack frame when the user specifies `-fstack-check'. GNU CC 1206 computed the default from the values of the above macros and you will 1207 normally not need to override that default. */ 1208 /* #define STACK_CHECK_MAX_VAR_SIZE */ 1209 1210 1211 /* Register That Address the Stack Frame. */ 1212 1213 /* The register number of the stack pointer register, which must also be a 1214 fixed register according to `FIXED_REGISTERS'. On most machines, the 1215 hardware determines which register this is. */ 1216 #define STACK_POINTER_REGNUM GPR_SP 1217 1218 /* The register number of the frame pointer register, which is used to access 1219 automatic variables in the stack frame. On some machines, the hardware 1220 determines which register this is. On other machines, you can choose any 1221 register you wish for this purpose. */ 1222 #define FRAME_POINTER_REGNUM GPR_FP 1223 1224 /* On some machines the offset between the frame pointer and starting offset of 1225 the automatic variables is not known until after register allocation has 1226 been done (for example, because the saved registers are between these two 1227 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of 1228 a special, fixed register to be used internally until the offset is known, 1229 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number 1230 used for the frame pointer. 1231 1232 You should define this macro only in the very rare circumstances when it is 1233 not possible to calculate the offset between the frame pointer and the 1234 automatic variables until after register allocation has been completed. 1235 When this macro is defined, you must also indicate in your definition of 1236 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either 1237 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'. 1238 1239 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */ 1240 /* #define HARD_FRAME_POINTER_REGNUM */ 1241 1242 /* The register number of the arg pointer register, which is used to access the 1243 function's argument list. On some machines, this is the same as the frame 1244 pointer register. On some machines, the hardware determines which register 1245 this is. On other machines, you can choose any register you wish for this 1246 purpose. If this is not the same register as the frame pointer register, 1247 then you must mark it as a fixed register according to `FIXED_REGISTERS', or 1248 arrange to be able to eliminate it (*note Elimination::.). */ 1249 /* #define ARG_POINTER_REGNUM */ 1250 1251 /* The register number of the return address pointer register, which is used to 1252 access the current function's return address from the stack. On some 1253 machines, the return address is not at a fixed offset from the frame pointer 1254 or stack pointer or argument pointer. This register can be defined to point 1255 to the return address on the stack, and then be converted by 1256 `ELIMINABLE_REGS' into either the frame pointer or stack pointer. 1257 1258 Do not define this macro unless there is no other way to get the return 1259 address from the stack. */ 1260 /* #define RETURN_ADDRESS_POINTER_REGNUM */ 1261 1262 /* Register numbers used for passing a function's static chain pointer. If 1263 register windows are used, the register number as seen by the called 1264 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as 1265 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers 1266 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined. 1267 1268 The static chain register need not be a fixed register. 1269 1270 If the static chain is passed in memory, these macros should not be defined; 1271 instead, the next two macros should be defined. */ 1272 1273 #define STATIC_CHAIN_REGNUM (GPR_FIRST + 18) 1274 /* #define STATIC_CHAIN_INCOMING_REGNUM */ 1275 1276 /* If the static chain is passed in memory, these macros provide rtx giving 1277 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and 1278 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called 1279 functions, respectively. Often the former will be at an offset from the 1280 stack pointer and the latter at an offset from the frame pointer. 1281 1282 The variables `stack_pointer_rtx', `frame_pointer_rtx', and 1283 `arg_pointer_rtx' will have been initialized prior to the use of these 1284 macros and should be used to refer to those items. 1285 1286 If the static chain is passed in a register, the two previous 1287 macros should be defined instead. */ 1288 /* #define STATIC_CHAIN */ 1289 /* #define STATIC_CHAIN_INCOMING */ 1290 1291 1292 /* Eliminating the Frame Pointer and the Arg Pointer */ 1293 1294 /* A C expression which is nonzero if a function must have and use a frame 1295 pointer. This expression is evaluated in the reload pass. If its value is 1296 nonzero the function will have a frame pointer. 1297 1298 The expression can in principle examine the current function and decide 1299 according to the facts, but on most machines the constant 0 or the constant 1300 1 suffices. Use 0 when the machine allows code to be generated with no 1301 frame pointer, and doing so saves some time or space. Use 1 when there is 1302 no possible advantage to avoiding a frame pointer. 1303 1304 In certain cases, the compiler does not know how to produce valid code 1305 without a frame pointer. The compiler recognizes those cases and 1306 automatically gives the function a frame pointer regardless of what 1307 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them. 1308 1309 In a function that does not require a frame pointer, the frame pointer 1310 register can be allocated for ordinary usage, unless you mark it as a fixed 1311 register. See `FIXED_REGISTERS' for more information. */ 1312 #define FRAME_POINTER_REQUIRED 0 1313 1314 /* A C statement to store in the variable DEPTH-VAR the difference between the 1315 frame pointer and the stack pointer values immediately after the function 1316 prologue. The value would be computed from information such as the result 1317 of `get_frame_size ()' and the tables of registers `regs_ever_live' and 1318 `call_used_regs'. 1319 1320 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not 1321 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED' 1322 is defined to always be true; in that case, you may set DEPTH-VAR to 1323 anything. */ 1324 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */ 1325 1326 /* If defined, this macro specifies a table of register pairs used to eliminate 1327 unneeded registers that point into the stack frame. If it is not defined, 1328 the only elimination attempted by the compiler is to replace references to 1329 the frame pointer with references to the stack pointer. 1330 1331 The definition of this macro is a list of structure initializations, each of 1332 which specifies an original and replacement register. 1333 1334 On some machines, the position of the argument pointer is not known until 1335 the compilation is completed. In such a case, a separate hard register must 1336 be used for the argument pointer. This register can be eliminated by 1337 replacing it with either the frame pointer or the argument pointer, 1338 depending on whether or not the frame pointer has been eliminated. 1339 1340 In this case, you might specify: 1341 #define ELIMINABLE_REGS \ 1342 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 1343 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ 1344 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} 1345 1346 Note that the elimination of the argument pointer with the stack pointer is 1347 specified first since that is the preferred elimination. */ 1348 #define ELIMINABLE_REGS \ 1349 { \ 1350 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ 1351 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \ 1352 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } \ 1353 } 1354 1355 /* A C expression that returns nonzero if the compiler is allowed to try to 1356 replace register number FROM-REG with register number TO-REG. This macro 1357 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be 1358 the constant 1, since most of the cases preventing register elimination are 1359 things that the compiler already knows about. */ 1360 1361 #define CAN_ELIMINATE(FROM, TO) \ 1362 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \ 1363 ? ! frame_pointer_needed \ 1364 : 1) 1365 1366 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the 1367 initial difference between the specified pair of registers. This macro must 1368 be defined if `ELIMINABLE_REGS' is defined. */ 1369 1370 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 1371 { \ 1372 d30v_stack_t *info = d30v_stack_info (); \ 1373 \ 1374 if ((FROM) == FRAME_POINTER_REGNUM) \ 1375 (OFFSET) = 0; \ 1376 else if ((FROM) == ARG_POINTER_REGNUM) \ 1377 (OFFSET) = info->total_size - current_function_pretend_args_size; \ 1378 else \ 1379 abort (); \ 1380 } 1381 1382 1383 /* Passing Function Arguments on the Stack */ 1384 1385 /* Define this macro if an argument declared in a prototype as an integral type 1386 smaller than `int' should actually be passed as an `int'. In addition to 1387 avoiding errors in certain cases of mismatch, it also makes for better code 1388 on certain machines. */ 1389 /* #define PROMOTE_PROTOTYPES */ 1390 1391 /* A C expression that is the number of bytes actually pushed onto the stack 1392 when an instruction attempts to push NPUSHED bytes. 1393 1394 If the target machine does not have a push instruction, do not define this 1395 macro. That directs GNU CC to use an alternate strategy: to allocate the 1396 entire argument block and then store the arguments into it. 1397 1398 On some machines, the definition 1399 1400 #define PUSH_ROUNDING(BYTES) (BYTES) 1401 1402 will suffice. But on other machines, instructions that appear to push one 1403 byte actually push two bytes in an attempt to maintain alignment. Then the 1404 definition should be 1405 1406 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */ 1407 /* #define PUSH_ROUNDING(NPUSHED) */ 1408 1409 /* If defined, the maximum amount of space required for outgoing arguments will 1410 be computed and placed into the variable 1411 `current_function_outgoing_args_size'. No space will be pushed onto the 1412 stack for each call; instead, the function prologue should increase the 1413 stack frame size by this amount. 1414 1415 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not 1416 proper. */ 1417 #define ACCUMULATE_OUTGOING_ARGS 1 1418 1419 /* Define this macro if functions should assume that stack space has been 1420 allocated for arguments even when their values are passed in registers. 1421 1422 The value of this macro is the size, in bytes, of the area reserved for 1423 arguments passed in registers for the function represented by FNDECL. 1424 1425 This space can be allocated by the caller, or be a part of the 1426 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says 1427 which. */ 1428 /* #define REG_PARM_STACK_SPACE(FNDECL) */ 1429 1430 /* Define these macros in addition to the one above if functions might allocate 1431 stack space for arguments even when their values are passed in registers. 1432 These should be used when the stack space allocated for arguments in 1433 registers is not a simple constant independent of the function declaration. 1434 1435 The value of the first macro is the size, in bytes, of the area that we 1436 should initially assume would be reserved for arguments passed in registers. 1437 1438 The value of the second macro is the actual size, in bytes, of the area that 1439 will be reserved for arguments passed in registers. This takes two 1440 arguments: an integer representing the number of bytes of fixed sized 1441 arguments on the stack, and a tree representing the number of bytes of 1442 variable sized arguments on the stack. 1443 1444 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called 1445 for libcall functions, the current function, or for a function being called 1446 when it is known that such stack space must be allocated. In each case this 1447 value can be easily computed. 1448 1449 When deciding whether a called function needs such stack space, and how much 1450 space to reserve, GNU CC uses these two macros instead of 1451 `REG_PARM_STACK_SPACE'. */ 1452 /* #define MAYBE_REG_PARM_STACK_SPACE */ 1453 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */ 1454 1455 /* Define this if it is the responsibility of the caller to allocate the area 1456 reserved for arguments passed in registers. 1457 1458 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the 1459 space for these arguments counts in the value of 1460 `current_function_outgoing_args_size'. */ 1461 /* #define OUTGOING_REG_PARM_STACK_SPACE */ 1462 1463 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack 1464 parameters don't skip the area specified by it. 1465 1466 Normally, when a parameter is not passed in registers, it is placed on the 1467 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro 1468 suppresses this behavior and causes the parameter to be passed on the stack 1469 in its natural location. */ 1470 /* #define STACK_PARMS_IN_REG_PARM_AREA */ 1471 1472 /* A C expression that should indicate the number of bytes of its own arguments 1473 that a function pops on returning, or 0 if the function pops no arguments 1474 and the caller must therefore pop them all after the function returns. 1475 1476 FUNDECL is a C variable whose value is a tree node that describes the 1477 function in question. Normally it is a node of type `FUNCTION_DECL' that 1478 describes the declaration of the function. From this it is possible to 1479 obtain the DECL_ATTRIBUTES of the function. 1480 1481 FUNTYPE is a C variable whose value is a tree node that describes the 1482 function in question. Normally it is a node of type `FUNCTION_TYPE' that 1483 describes the data type of the function. From this it is possible to obtain 1484 the data types of the value and arguments (if known). 1485 1486 When a call to a library function is being considered, FUNTYPE will contain 1487 an identifier node for the library function. Thus, if you need to 1488 distinguish among various library functions, you can do so by their names. 1489 Note that "library function" in this context means a function used to 1490 perform arithmetic, whose name is known specially in the compiler and was 1491 not mentioned in the C code being compiled. 1492 1493 STACK-SIZE is the number of bytes of arguments passed on the stack. If a 1494 variable number of bytes is passed, it is zero, and argument popping will 1495 always be the responsibility of the calling function. 1496 1497 On the VAX, all functions always pop their arguments, so the definition of 1498 this macro is STACK-SIZE. On the 68000, using the standard calling 1499 convention, no functions pop their arguments, so the value of the macro is 1500 always 0 in this case. But an alternative calling convention is available 1501 in which functions that take a fixed number of arguments pop them but other 1502 functions (such as `printf') pop nothing (the caller pops all). When this 1503 convention is in use, FUNTYPE is examined to determine whether a function 1504 takes a fixed number of arguments. */ 1505 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0 1506 1507 1508 /* Function Arguments in Registers */ 1509 1510 /* A C expression that controls whether a function argument is passed in a 1511 register, and which register. 1512 1513 The arguments are CUM, which summarizes all the previous arguments; MODE, 1514 the machine mode of the argument; TYPE, the data type of the argument as a 1515 tree node or 0 if that is not known (which happens for C support library 1516 functions); and NAMED, which is 1 for an ordinary argument and 0 for 1517 nameless arguments that correspond to `...' in the called function's 1518 prototype. 1519 1520 The value of the expression should either be a `reg' RTX for the hard 1521 register in which to pass the argument, or zero to pass the argument on the 1522 stack. 1523 1524 For machines like the VAX and 68000, where normally all arguments are 1525 pushed, zero suffices as a definition. 1526 1527 The usual way to make the ANSI library `stdarg.h' work on a machine where 1528 some arguments are usually passed in registers, is to cause nameless 1529 arguments to be passed on the stack instead. This is done by making 1530 `FUNCTION_ARG' return 0 whenever NAMED is 0. 1531 1532 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of 1533 this macro to determine if this argument is of a type that must be passed in 1534 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG' 1535 returns nonzero for such an argument, the compiler will abort. If 1536 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the 1537 stack and then loaded into a register. */ 1538 1539 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ 1540 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, FALSE) 1541 1542 /* Define this macro if the target machine has "register windows", so that the 1543 register in which a function sees an arguments is not necessarily the same 1544 as the one in which the caller passed the argument. 1545 1546 For such machines, `FUNCTION_ARG' computes the register in which the caller 1547 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar 1548 fashion to tell the function being called where the arguments will arrive. 1549 1550 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both 1551 purposes. */ 1552 1553 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \ 1554 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, TRUE) 1555 1556 /* A C expression for the number of words, at the beginning of an argument, 1557 must be put in registers. The value must be zero for arguments that are 1558 passed entirely in registers or that are entirely pushed on the stack. 1559 1560 On some machines, certain arguments must be passed partially in registers 1561 and partially in memory. On these machines, typically the first N words of 1562 arguments are passed in registers, and the rest on the stack. If a 1563 multi-word argument (a `double' or a structure) crosses that boundary, its 1564 first few words must be passed in registers and the rest must be pushed. 1565 This macro tells the compiler when this occurs, and how many of the words 1566 should go in registers. 1567 1568 `FUNCTION_ARG' for these arguments should return the first register to be 1569 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for 1570 the called function. */ 1571 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ 1572 d30v_function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED) 1573 1574 /* A C expression that indicates when an argument must be passed by reference. 1575 If nonzero for an argument, a copy of that argument is made in memory and a 1576 pointer to the argument is passed instead of the argument itself. The 1577 pointer is passed in whatever way is appropriate for passing a pointer to 1578 that type. 1579 1580 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable 1581 definition of this macro might be 1582 #define FUNCTION_ARG_PASS_BY_REFERENCE\ 1583 (CUM, MODE, TYPE, NAMED) \ 1584 MUST_PASS_IN_STACK (MODE, TYPE) */ 1585 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0 1586 1587 /* If defined, a C expression that indicates when it is the called function's 1588 responsibility to make a copy of arguments passed by invisible reference. 1589 Normally, the caller makes a copy and passes the address of the copy to the 1590 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is 1591 nonzero, the caller does not make a copy. Instead, it passes a pointer to 1592 the "live" value. The called function must not modify this value. If it 1593 can be determined that the value won't be modified, it need not make a copy; 1594 otherwise a copy must be made. */ 1595 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */ 1596 1597 /* A C type for declaring a variable that is used as the first argument of 1598 `FUNCTION_ARG' and other related values. For some target machines, the type 1599 `int' suffices and can hold the number of bytes of argument so far. 1600 1601 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments 1602 that have been passed on the stack. The compiler has other variables to 1603 keep track of that. For target machines on which all arguments are passed 1604 on the stack, there is no need to store anything in `CUMULATIVE_ARGS'; 1605 however, the data structure must exist and should not be empty, so use 1606 `int'. */ 1607 #define CUMULATIVE_ARGS int 1608 1609 /* A C statement (sans semicolon) for initializing the variable CUM for the 1610 state at the beginning of the argument list. The variable has type 1611 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type 1612 of the function which will receive the args, or 0 if the args are to a 1613 compiler support library function. The value of INDIRECT is nonzero when 1614 processing an indirect call, for example a call through a function pointer. 1615 The value of INDIRECT is zero for a call to an explicitly named function, a 1616 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find 1617 arguments for the function being compiled. 1618 1619 When processing a call to a compiler support library function, LIBNAME 1620 identifies which one. It is a `symbol_ref' rtx which contains the name of 1621 the function, as a string. LIBNAME is 0 when an ordinary C function call is 1622 being processed. Thus, each time this macro is called, either LIBNAME or 1623 FNTYPE is nonzero, but never both of them at once. */ 1624 1625 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \ 1626 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, INDIRECT, FALSE) 1627 1628 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the 1629 arguments for the function being compiled. If this macro is undefined, 1630 `INIT_CUMULATIVE_ARGS' is used instead. 1631 1632 The value passed for LIBNAME is always 0, since library routines with 1633 special calling conventions are never compiled with GNU CC. The argument 1634 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */ 1635 1636 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \ 1637 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, TRUE) 1638 1639 /* A C statement (sans semicolon) to update the summarizer variable CUM to 1640 advance past an argument in the argument list. The values MODE, TYPE and 1641 NAMED describe that argument. Once this is done, the variable CUM is 1642 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc. 1643 1644 This macro need not do anything if the argument in question was passed on 1645 the stack. The compiler knows how to track the amount of stack space used 1646 for arguments without any special help. */ 1647 1648 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ 1649 d30v_function_arg_advance (&CUM, (int) MODE, TYPE, NAMED) 1650 1651 /* If defined, a C expression which determines whether, and in which direction, 1652 to pad out an argument with extra space. The value should be of type `enum 1653 direction': either `upward' to pad above the argument, `downward' to pad 1654 below, or `none' to inhibit padding. 1655 1656 The *amount* of padding is always just enough to reach the next multiple of 1657 `FUNCTION_ARG_BOUNDARY'; this macro does not control it. 1658 1659 This macro has a default definition which is right for most systems. For 1660 little-endian machines, the default is to pad upward. For big-endian 1661 machines, the default is to pad downward for an argument of constant size 1662 shorter than an `int', and upward otherwise. */ 1663 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */ 1664 1665 /* If defined, a C expression that gives the alignment boundary, in bits, of an 1666 argument with the specified mode and type. If it is not defined, 1667 `PARM_BOUNDARY' is used for all arguments. */ 1668 1669 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ 1670 d30v_function_arg_boundary ((int) MODE, TYPE) 1671 1672 /* A C expression that is nonzero if REGNO is the number of a hard register in 1673 which function arguments are sometimes passed. This does *not* include 1674 implicit arguments such as the static chain and the structure-value address. 1675 On many machines, no registers can be used for this purpose since all 1676 function arguments are pushed on the stack. */ 1677 1678 #define FUNCTION_ARG_REGNO_P(REGNO) \ 1679 IN_RANGE_P (REGNO, GPR_ARG_FIRST, GPR_ARG_LAST) 1680 1681 1682 /* How Scalar Function Values are Returned */ 1683 1684 /* A C expression to create an RTX representing the place where a function 1685 returns a value of data type VALTYPE. VALTYPE is a tree node representing a 1686 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to 1687 represent that type. On many machines, only the mode is relevant. 1688 (Actually, on most machines, scalar values are returned in the same place 1689 regardless of mode). 1690 1691 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion 1692 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type. 1693 1694 If the precise function being called is known, FUNC is a tree node 1695 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it 1696 possible to use a different value-returning convention for specific 1697 functions when all their calls are known. 1698 1699 `FUNCTION_VALUE' is not used for return vales with aggregate data types, 1700 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and 1701 related macros, below. */ 1702 1703 #define FUNCTION_VALUE(VALTYPE, FUNC) \ 1704 gen_rtx (REG, TYPE_MODE (VALTYPE), GPR_RET_VALUE) 1705 1706 /* Define this macro if the target machine has "register windows" so that the 1707 register in which a function returns its value is not the same as the one in 1708 which the caller sees the value. 1709 1710 For such machines, `FUNCTION_VALUE' computes the register in which the 1711 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a 1712 similar fashion to tell the function where to put the value. 1713 1714 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both 1715 purposes. 1716 1717 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data 1718 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM' 1719 and related macros, below. */ 1720 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */ 1721 1722 /* A C expression to create an RTX representing the place where a library 1723 function returns a value of mode MODE. If the precise function being called 1724 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a 1725 null pointer. This makes it possible to use a different value-returning 1726 convention for specific functions when all their calls are known. 1727 1728 Note that "library function" in this context means a compiler support 1729 routine, used to perform arithmetic, whose name is known specially by the 1730 compiler and was not mentioned in the C code being compiled. 1731 1732 The definition of `LIBRARY_VALUE' need not be concerned aggregate data 1733 types, because none of the library functions returns such types. */ 1734 1735 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, GPR_RET_VALUE) 1736 1737 /* A C expression that is nonzero if REGNO is the number of a hard register in 1738 which the values of called function may come back. 1739 1740 A register whose use for returning values is limited to serving as the 1741 second of a pair (for a value of type `double', say) need not be recognized 1742 by this macro. So for most machines, this definition suffices: 1743 1744 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) 1745 1746 If the machine has register windows, so that the caller and the called 1747 function use different registers for the return value, this macro should 1748 recognize only the caller's register numbers. */ 1749 1750 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == GPR_RET_VALUE) 1751 1752 /* Define this macro if `untyped_call' and `untyped_return' need more space 1753 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an 1754 arbitrary return value. */ 1755 /* #define APPLY_RESULT_SIZE */ 1756 1757 1758 /* How Large Values are Returned */ 1759 1760 /* A C expression which can inhibit the returning of certain function values in 1761 registers, based on the type of value. A nonzero value says to return the 1762 function value in memory, just as large structures are always returned. 1763 Here TYPE will be a C expression of type `tree', representing the data type 1764 of the value. 1765 1766 Note that values of mode `BLKmode' must be explicitly handled by this macro. 1767 Also, the option `-fpcc-struct-return' takes effect regardless of this 1768 macro. On most systems, it is possible to leave the macro undefined; this 1769 causes a default definition to be used, whose value is the constant 1 for 1770 `BLKmode' values, and 0 otherwise. 1771 1772 Do not use this macro to indicate that structures and unions should always 1773 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN' 1774 to indicate this. */ 1775 /* #define RETURN_IN_MEMORY(TYPE) */ 1776 1777 /* Define this macro to be 1 if all structure and union return values must be 1778 in memory. Since this results in slower code, this should be defined only 1779 if needed for compatibility with other compilers or with an ABI. If you 1780 define this macro to be 0, then the conventions used for structure and union 1781 return values are decided by the `RETURN_IN_MEMORY' macro. 1782 1783 If not defined, this defaults to the value 1. */ 1784 /* #define DEFAULT_PCC_STRUCT_RETURN */ 1785 1786 /* If the structure value address is passed in a register, then 1787 `STRUCT_VALUE_REGNUM' should be the number of that register. */ 1788 1789 #define STRUCT_VALUE_REGNUM GPR_ARG_FIRST 1790 1791 /* If the structure value address is not passed in a register, define 1792 `STRUCT_VALUE' as an expression returning an RTX for the place where the 1793 address is passed. If it returns 0, the address is passed as an "invisible" 1794 first argument. */ 1795 1796 #define STRUCT_VALUE 0 1797 1798 /* On some architectures the place where the structure value address is found 1799 by the called function is not the same place that the caller put it. This 1800 can be due to register windows, or it could be because the function prologue 1801 moves it to a different place. 1802 1803 If the incoming location of the structure value address is in a register, 1804 define this macro as the register number. */ 1805 /* #define STRUCT_VALUE_INCOMING_REGNUM */ 1806 1807 /* If the incoming location is not a register, then you should define 1808 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called 1809 function should find the value. If it should find the value on the stack, 1810 define this to create a `mem' which refers to the frame pointer. A 1811 definition of 0 means that the address is passed as an "invisible" first 1812 argument. */ 1813 /* #define STRUCT_VALUE_INCOMING */ 1814 1815 /* Define this macro if the usual system convention on the target machine for 1816 returning structures and unions is for the called function to return the 1817 address of a static variable containing the value. 1818 1819 Do not define this if the usual system convention is for the caller to pass 1820 an address to the subroutine. 1821 1822 This macro has effect in `-fpcc-struct-return' mode, but it does nothing 1823 when you use `-freg-struct-return' mode. */ 1824 /* #define PCC_STATIC_STRUCT_RETURN */ 1825 1826 1827 /* Caller-Saves Register Allocation */ 1828 1829 /* Define this macro if function calls on the target machine do not preserve 1830 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all 1831 registers. This macro enables `-fcaller-saves' by default. Eventually that 1832 option will be enabled by default on all machines and both the option and 1833 this macro will be eliminated. */ 1834 /* #define DEFAULT_CALLER_SAVES */ 1835 1836 /* A C expression to determine whether it is worthwhile to consider placing a 1837 pseudo-register in a call-clobbered hard register and saving and restoring 1838 it around each function call. The expression should be 1 when this is worth 1839 doing, and 0 otherwise. 1840 1841 If you don't define this macro, a default is used which is good on most 1842 machines: `4 * CALLS < REFS'. */ 1843 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */ 1844 1845 1846 /* #define EXIT_IGNORE_STACK */ 1847 1848 /* Define this macro as a C expression that is nonzero for registers 1849 are used by the epilogue or the `return' pattern. The stack and 1850 frame pointer registers are already be assumed to be used as 1851 needed. */ 1852 #define EPILOGUE_USES(REGNO) ((REGNO) == GPR_LINK) 1853 1854 /* Define this macro if the function epilogue contains delay slots to which 1855 instructions from the rest of the function can be "moved". The definition 1856 should be a C expression whose value is an integer representing the number 1857 of delay slots there. */ 1858 /* #define DELAY_SLOTS_FOR_EPILOGUE */ 1859 1860 /* A C expression that returns 1 if INSN can be placed in delay slot number N 1861 of the epilogue. 1862 1863 The argument N is an integer which identifies the delay slot now being 1864 considered (since different slots may have different rules of eligibility). 1865 It is never negative and is always less than the number of epilogue delay 1866 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular 1867 insn for a given delay slot, in principle, it may be reconsidered for a 1868 subsequent delay slot. Also, other insns may (at least in principle) be 1869 considered for the so far unfilled delay slot. 1870 1871 The insns accepted to fill the epilogue delay slots are put in an 1872 RTL list made with `insn_list' objects, stored in the variable 1873 `current_function_epilogue_delay_list'. The insn for the first 1874 delay slot comes first in the list. Your definition of the function 1875 output_function_epilogue() should fill the delay slots by outputting the 1876 insns in this list, usually by calling `final_scan_insn'. 1877 1878 You need not define this macro if you did not define 1879 `DELAY_SLOTS_FOR_EPILOGUE'. */ 1880 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */ 1881 1882 /* A C structure for machine-specific, per-function data. 1883 This is added to the cfun structure. */ 1884 typedef struct machine_function GTY(()) 1885 { 1886 /* Additionsl stack adjustment in __builtin_eh_throw. */ 1887 rtx eh_epilogue_sp_ofs; 1888 } machine_function; 1889 1890 1891 /* Generating Code for Profiling. */ 1892 1893 /* A C statement or compound statement to output to FILE some assembler code to 1894 call the profiling subroutine `mcount'. Before calling, the assembler code 1895 must load the address of a counter variable into a register where `mcount' 1896 expects to find the address. The name of this variable is `LP' followed by 1897 the number LABELNO, so you would generate the name using `LP%d' in a 1898 `fprintf'. 1899 1900 The details of how the address should be passed to `mcount' are determined 1901 by your operating system environment, not by GNU CC. To figure them out, 1902 compile a small program for profiling using the system's installed C 1903 compiler and look at the assembler code that results. */ 1904 1905 #define FUNCTION_PROFILER(FILE, LABELNO) d30v_function_profiler (FILE, LABELNO) 1906 1907 /* Define this macro if the code for function profiling should come before the 1908 function prologue. Normally, the profiling code comes after. */ 1909 /* #define PROFILE_BEFORE_PROLOGUE */ 1910 1911 1912 /* Implementing the Varargs Macros. */ 1913 1914 /* If defined, is a C expression that produces the machine-specific code for a 1915 call to `__builtin_saveregs'. This code will be moved to the very beginning 1916 of the function, before any parameter access are made. The return value of 1917 this function should be an RTX that contains the value to use as the return 1918 of `__builtin_saveregs'. 1919 1920 If this macro is not defined, the compiler will output an ordinary call to 1921 the library function `__builtin_saveregs'. */ 1922 1923 #define EXPAND_BUILTIN_SAVEREGS() d30v_expand_builtin_saveregs () 1924 1925 /* This macro offers an alternative to using `__builtin_saveregs' and defining 1926 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register 1927 arguments into the stack so that all the arguments appear to have been 1928 passed consecutively on the stack. Once this is done, you can use the 1929 standard implementation of varargs that works for machines that pass all 1930 their arguments on the stack. 1931 1932 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing 1933 the values that obtain after processing of the named arguments. The 1934 arguments MODE and TYPE describe the last named argument--its machine mode 1935 and its data type as a tree node. 1936 1937 The macro implementation should do two things: first, push onto the stack 1938 all the argument registers *not* used for the named arguments, and second, 1939 store the size of the data thus pushed into the `int'-valued variable whose 1940 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you 1941 store here will serve as additional offset for setting up the stack frame. 1942 1943 Because you must generate code to push the anonymous arguments at compile 1944 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only 1945 useful on machines that have just a single category of argument register and 1946 use it uniformly for all data types. 1947 1948 If the argument SECOND_TIME is nonzero, it means that the arguments of the 1949 function are being analyzed for the second time. This happens for an inline 1950 function, which is not actually compiled until the end of the source file. 1951 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in 1952 this case. */ 1953 1954 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \ 1955 d30v_setup_incoming_varargs (&ARGS_SO_FAR, (int) MODE, TYPE, \ 1956 &PRETEND_ARGS_SIZE, SECOND_TIME) 1957 1958 /* Define this macro if the location where a function argument is passed 1959 depends on whether or not it is a named argument. 1960 1961 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for 1962 varargs and stdarg functions. With this macro defined, the NAMED argument 1963 is always true for named arguments, and false for unnamed arguments. If 1964 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all 1965 arguments are treated as named. Otherwise, all named arguments except the 1966 last are treated as named. */ 1967 /* #define STRICT_ARGUMENT_NAMING */ 1968 1969 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not 1970 defined, it is assumed that va_list is a void * pointer. */ 1971 1972 #define BUILD_VA_LIST_TYPE(VALIST) \ 1973 (VALIST) = d30v_build_va_list () 1974 1975 1976 /* Implement the stdarg/varargs va_start macro. STDARG_P is nonzero if this 1977 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list 1978 variable to initialize. NEXTARG is the machine independent notion of the 1979 'next' argument after the variable arguments. If not defined, a standard 1980 implementation will be defined that works for arguments passed on the stack. */ 1981 1982 #define EXPAND_BUILTIN_VA_START(VALIST, NEXTARG) \ 1983 d30v_expand_builtin_va_start(VALIST, NEXTARG) 1984 1985 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type 1986 va_list as a tree, TYPE is the type passed to va_arg. */ 1987 1988 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \ 1989 (d30v_expand_builtin_va_arg (VALIST, TYPE)) 1990 1991 /* Implement the stdarg/varargs va_end macro. 1992 VALIST is the variable of type va_list as a tree. */ 1993 1994 /* #define EXPAND_BUILTIN_VA_END(VALIST) */ 1995 1996 1997 1998 /* Trampolines for Nested Functions. */ 1999 2000 /* A C statement to output, on the stream FILE, assembler code for a block of 2001 data that contains the constant parts of a trampoline. This code should not 2002 include a label--the label is taken care of automatically. */ 2003 /* #define TRAMPOLINE_TEMPLATE(FILE) d30v_trampoline_template (FILE) */ 2004 2005 /* The name of a subroutine to switch to the section in which the trampoline 2006 template is to be placed (*note Sections::.). The default is a value of 2007 `readonly_data_section', which places the trampoline in the section 2008 containing read-only data. */ 2009 /* #define TRAMPOLINE_SECTION */ 2010 2011 /* A C expression for the size in bytes of the trampoline, as an integer. */ 2012 #define TRAMPOLINE_SIZE (d30v_trampoline_size ()) 2013 2014 /* Alignment required for trampolines, in bits. 2015 2016 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for 2017 aligning trampolines. */ 2018 #define TRAMPOLINE_ALIGNMENT 64 2019 2020 /* A C statement to initialize the variable parts of a trampoline. ADDR is an 2021 RTX for the address of the trampoline; FNADDR is an RTX for the address of 2022 the nested function; STATIC_CHAIN is an RTX for the static chain value that 2023 should be passed to the function when it is called. */ 2024 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \ 2025 d30v_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN) 2026 2027 /* A C expression to allocate run-time space for a trampoline. The expression 2028 value should be an RTX representing a memory reference to the space for the 2029 trampoline. 2030 2031 If this macro is not defined, by default the trampoline is allocated as a 2032 stack slot. This default is right for most machines. The exceptions are 2033 machines where it is impossible to execute instructions in the stack area. 2034 On such machines, you may have to implement a separate stack, using this 2035 macro in conjunction with output_function_prologue () and 2036 output_function_epilogue (). 2037 2038 FP points to a data structure, a `struct function', which describes the 2039 compilation status of the immediate containing function of the function 2040 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not 2041 defined), the stack slot for the trampoline is in the stack frame of this 2042 containing function. Other allocation strategies probably must do something 2043 analogous with this information. */ 2044 /* #define ALLOCATE_TRAMPOLINE(FP) */ 2045 2046 /* Implementing trampolines is difficult on many machines because they have 2047 separate instruction and data caches. Writing into a stack location fails 2048 to clear the memory in the instruction cache, so when the program jumps to 2049 that location, it executes the old contents. 2050 2051 Here are two possible solutions. One is to clear the relevant parts of the 2052 instruction cache whenever a trampoline is set up. The other is to make all 2053 trampolines identical, by having them jump to a standard subroutine. The 2054 former technique makes trampoline execution faster; the latter makes 2055 initialization faster. 2056 2057 To clear the instruction cache when a trampoline is initialized, define the 2058 following macros which describe the shape of the cache. */ 2059 2060 /* The total size in bytes of the cache. */ 2061 /* #define INSN_CACHE_SIZE */ 2062 2063 /* The length in bytes of each cache line. The cache is divided into cache 2064 lines which are disjoint slots, each holding a contiguous chunk of data 2065 fetched from memory. Each time data is brought into the cache, an entire 2066 line is read at once. The data loaded into a cache line is always aligned 2067 on a boundary equal to the line size. */ 2068 /* #define INSN_CACHE_LINE_WIDTH */ 2069 2070 /* The number of alternative cache lines that can hold any particular memory 2071 location. */ 2072 /* #define INSN_CACHE_DEPTH */ 2073 2074 /* Alternatively, if the machine has system calls or instructions to clear the 2075 instruction cache directly, you can define the following macro. */ 2076 2077 /* If defined, expands to a C expression clearing the *instruction cache* in 2078 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE 2079 is defined, some generic code is generated to clear the cache. The 2080 definition of this macro would typically be a series of `asm' statements. 2081 Both BEG and END are both pointer expressions. */ 2082 /* #define CLEAR_INSN_CACHE (BEG, END) */ 2083 2084 /* To use a standard subroutine, define the following macro. In addition, you 2085 must make sure that the instructions in a trampoline fill an entire cache 2086 line with identical instructions, or else ensure that the beginning of the 2087 trampoline code is always aligned at the same point in its cache line. Look 2088 in `m68k.h' as a guide. */ 2089 2090 /* Define this macro if trampolines need a special subroutine to do their work. 2091 The macro should expand to a series of `asm' statements which will be 2092 compiled with GNU CC. They go in a library function named 2093 `__transfer_from_trampoline'. 2094 2095 If you need to avoid executing the ordinary prologue code of a compiled C 2096 function when you jump to the subroutine, you can do so by placing a special 2097 label of your own in the assembler code. Use one `asm' statement to 2098 generate an assembler label, and another to make the label global. Then 2099 trampolines can use that label to jump directly to your special assembler 2100 code. */ 2101 /* #define TRANSFER_FROM_TRAMPOLINE */ 2102 2103 2104 /* Implicit Calls to Library Routines */ 2105 2106 /* A C string constant giving the name of the function to call for 2107 multiplication of one signed full-word by another. If you do not define 2108 this macro, the default name is used, which is `__mulsi3', a function 2109 defined in `libgcc.a'. */ 2110 /* #define MULSI3_LIBCALL */ 2111 2112 /* A C string constant giving the name of the function to call for division of 2113 one signed full-word by another. If you do not define this macro, the 2114 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */ 2115 /* #define DIVSI3_LIBCALL */ 2116 2117 /* A C string constant giving the name of the function to call for division of 2118 one unsigned full-word by another. If you do not define this macro, the 2119 default name is used, which is `__udivsi3', a function defined in 2120 `libgcc.a'. */ 2121 /* #define UDIVSI3_LIBCALL */ 2122 2123 /* A C string constant giving the name of the function to call for the 2124 remainder in division of one signed full-word by another. If you do not 2125 define this macro, the default name is used, which is `__modsi3', a function 2126 defined in `libgcc.a'. */ 2127 /* #define MODSI3_LIBCALL */ 2128 2129 /* A C string constant giving the name of the function to call for the 2130 remainder in division of one unsigned full-word by another. If you do not 2131 define this macro, the default name is used, which is `__umodsi3', a 2132 function defined in `libgcc.a'. */ 2133 /* #define UMODSI3_LIBCALL */ 2134 2135 /* A C string constant giving the name of the function to call for 2136 multiplication of one signed double-word by another. If you do not define 2137 this macro, the default name is used, which is `__muldi3', a function 2138 defined in `libgcc.a'. */ 2139 /* #define MULDI3_LIBCALL */ 2140 2141 /* A C string constant giving the name of the function to call for division of 2142 one signed double-word by another. If you do not define this macro, the 2143 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */ 2144 /* #define DIVDI3_LIBCALL */ 2145 2146 /* A C string constant giving the name of the function to call for division of 2147 one unsigned full-word by another. If you do not define this macro, the 2148 default name is used, which is `__udivdi3', a function defined in 2149 `libgcc.a'. */ 2150 /* #define UDIVDI3_LIBCALL */ 2151 2152 /* A C string constant giving the name of the function to call for the 2153 remainder in division of one signed double-word by another. If you do not 2154 define this macro, the default name is used, which is `__moddi3', a function 2155 defined in `libgcc.a'. */ 2156 /* #define MODDI3_LIBCALL */ 2157 2158 /* A C string constant giving the name of the function to call for the 2159 remainder in division of one unsigned full-word by another. If you do not 2160 define this macro, the default name is used, which is `__umoddi3', a 2161 function defined in `libgcc.a'. */ 2162 /* #define UMODDI3_LIBCALL */ 2163 2164 /* Define this macro as a C statement that declares additional library routines 2165 renames existing ones. `init_optabs' calls this macro after initializing all 2166 the normal library routines. */ 2167 /* #define INIT_TARGET_OPTABS */ 2168 2169 /* The value of `EDOM' on the target machine, as a C integer constant 2170 expression. If you don't define this macro, GNU CC does not attempt to 2171 deposit the value of `EDOM' into `errno' directly. Look in 2172 `/usr/include/errno.h' to find the value of `EDOM' on your system. 2173 2174 If you do not define `TARGET_EDOM', then compiled code reports domain errors 2175 by calling the library function and letting it report the error. If 2176 mathematical functions on your system use `matherr' when there is an error, 2177 then you should leave `TARGET_EDOM' undefined so that `matherr' is used 2178 normally. */ 2179 /* #define TARGET_EDOM */ 2180 2181 /* Define this macro as a C expression to create an rtl expression that refers 2182 to the global "variable" `errno'. (On certain systems, `errno' may not 2183 actually be a variable.) If you don't define this macro, a reasonable 2184 default is used. */ 2185 /* #define GEN_ERRNO_RTX */ 2186 2187 /* Define this macro if GNU CC should generate calls to the System V (and ANSI 2188 C) library functions `memcpy' and `memset' rather than the BSD functions 2189 `bcopy' and `bzero'. 2190 2191 Defined in svr4.h. */ 2192 /* #define TARGET_MEM_FUNCTIONS */ 2193 2194 /* Define this macro to generate code for Objective-C message sending using the 2195 calling convention of the NeXT system. This calling convention involves 2196 passing the object, the selector and the method arguments all at once to the 2197 method-lookup library function. 2198 2199 The default calling convention passes just the object and the selector to 2200 the lookup function, which returns a pointer to the method. */ 2201 /* #define NEXT_OBJC_RUNTIME */ 2202 2203 2204 /* Addressing Modes */ 2205 2206 /* Define this macro if the machine supports post-increment addressing. */ 2207 #define HAVE_POST_INCREMENT 1 2208 2209 /* Similar for other kinds of addressing. */ 2210 /* #define HAVE_PRE_INCREMENT 0 */ 2211 #define HAVE_POST_DECREMENT 1 2212 /* #define HAVE_PRE_DECREMENT 0 */ 2213 2214 /* A C expression that is 1 if the RTX X is a constant which is a valid 2215 address. On most machines, this can be defined as `CONSTANT_P (X)', but a 2216 few machines are more restrictive in which constant addresses are supported. 2217 2218 `CONSTANT_P' accepts integer-values expressions whose values are not 2219 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions 2220 and `const' arithmetic expressions, in addition to `const_int' and 2221 `const_double' expressions. */ 2222 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X) 2223 2224 /* A number, the maximum number of registers that can appear in a valid memory 2225 address. Note that it is up to you to specify a value equal to the maximum 2226 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */ 2227 #define MAX_REGS_PER_ADDRESS 2 2228 2229 /* A C compound statement with a conditional `goto LABEL;' executed if X (an 2230 RTX) is a legitimate memory address on the target machine for a memory 2231 operand of mode MODE. */ 2232 2233 #ifdef REG_OK_STRICT 2234 #define REG_OK_STRICT_P 1 2235 #else 2236 #define REG_OK_STRICT_P 0 2237 #endif 2238 2239 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ 2240 do { \ 2241 if (d30v_legitimate_address_p ((int)MODE, X, REG_OK_STRICT_P)) \ 2242 goto ADDR; \ 2243 } while (0) 2244 2245 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for 2246 use as a base register. For hard registers, it should always accept those 2247 which the hardware permits and reject the others. Whether the macro accepts 2248 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as 2249 described above. This usually requires two variant definitions, of which 2250 `REG_OK_STRICT' controls the one actually used. */ 2251 2252 #ifdef REG_OK_STRICT 2253 #define REG_OK_FOR_BASE_P(X) (GPR_P (REGNO (X))) 2254 #else 2255 #define REG_OK_FOR_BASE_P(X) (GPR_OR_PSEUDO_P (REGNO (X))) 2256 #endif 2257 2258 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for 2259 use as an index register. 2260 2261 The difference between an index register and a base register is that the 2262 index register may be scaled. If an address involves the sum of two 2263 registers, neither one of them scaled, then either one may be labeled the 2264 "base" and the other the "index"; but whichever labeling is used must fit 2265 the machine's constraints of which registers may serve in each capacity. 2266 The compiler will try both labelings, looking for one that is valid, and 2267 will reload one or both registers only if neither labeling works. */ 2268 2269 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) 2270 2271 /* A C compound statement that attempts to replace X with a valid memory 2272 address for an operand of mode MODE. WIN will be a C statement label 2273 elsewhere in the code; the macro definition may use 2274 2275 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); 2276 2277 to avoid further processing if the address has become legitimate. 2278 2279 X will always be the result of a call to `break_out_memory_refs', and OLDX 2280 will be the operand that was given to that function to produce X. 2281 2282 The code generated by this macro should not alter the substructure of X. If 2283 it transforms X into a more legitimate form, it should assign X (which will 2284 always be a C variable) a new value. 2285 2286 It is not necessary for this macro to come up with a legitimate address. 2287 The compiler has standard ways of doing so in all cases. In fact, it is 2288 safe for this macro to do nothing. But often a machine-dependent strategy 2289 can generate better code. */ 2290 2291 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \ 2292 do { \ 2293 rtx y = d30v_legitimize_address (X, OLDX, (int)MODE, REG_OK_STRICT_P); \ 2294 if (y) \ 2295 { \ 2296 X = y; \ 2297 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); \ 2298 } \ 2299 } while (0) 2300 2301 /* A C statement or compound statement with a conditional `goto LABEL;' 2302 executed if memory address X (an RTX) can have different meanings depending 2303 on the machine mode of the memory reference it is used for or if the address 2304 is valid for some modes but not others. 2305 2306 Autoincrement and autodecrement addresses typically have mode-dependent 2307 effects because the amount of the increment or decrement is the size of the 2308 operand being addressed. Some machines have other mode-dependent addresses. 2309 Many RISC machines have no mode-dependent addresses. 2310 2311 You may assume that ADDR is a valid address for the machine. */ 2312 2313 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \ 2314 do { \ 2315 if (d30v_mode_dependent_address_p (ADDR)) \ 2316 goto LABEL; \ 2317 } while (0) \ 2318 2319 /* A C expression that is nonzero if X is a legitimate constant for an 2320 immediate operand on the target machine. You can assume that X satisfies 2321 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable 2322 definition for this macro on machines where anything `CONSTANT_P' is valid. */ 2323 #define LEGITIMATE_CONSTANT_P(X) 1 2324 2325 2326 /* Condition Code Status */ 2327 2328 /* C code for a data type which is used for declaring the `mdep' component of 2329 `cc_status'. It defaults to `int'. 2330 2331 This macro is not used on machines that do not use `cc0'. */ 2332 /* #define CC_STATUS_MDEP */ 2333 2334 /* A C expression to initialize the `mdep' field to "empty". The default 2335 definition does nothing, since most machines don't use the field anyway. If 2336 you want to use the field, you should probably define this macro to 2337 initialize it. 2338 2339 This macro is not used on machines that do not use `cc0'. */ 2340 /* #define CC_STATUS_MDEP_INIT */ 2341 2342 /* A C compound statement to set the components of `cc_status' appropriately 2343 for an insn INSN whose body is EXP. It is this macro's responsibility to 2344 recognize insns that set the condition code as a byproduct of other activity 2345 as well as those that explicitly set `(cc0)'. 2346 2347 This macro is not used on machines that do not use `cc0'. 2348 2349 If there are insns that do not set the condition code but do alter other 2350 machine registers, this macro must check to see whether they invalidate the 2351 expressions that the condition code is recorded as reflecting. For example, 2352 on the 68000, insns that store in address registers do not set the condition 2353 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status' 2354 unaltered for such insns. But suppose that the previous insn set the 2355 condition code based on location `a4@(102)' and the current insn stores a 2356 new value in `a4'. Although the condition code is not changed by this, it 2357 will no longer be true that it reflects the contents of `a4@(102)'. 2358 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say 2359 that nothing is known about the condition code value. 2360 2361 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the 2362 results of peephole optimization: insns whose patterns are `parallel' RTXs 2363 containing various `reg', `mem' or constants which are just the operands. 2364 The RTL structure of these insns is not sufficient to indicate what the 2365 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is 2366 just to run `CC_STATUS_INIT'. 2367 2368 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks 2369 at an attribute (*note Insn Attributes::.) named, for example, `cc'. This 2370 avoids having detailed information about patterns in two places, the `md' 2371 file and in `NOTICE_UPDATE_CC'. */ 2372 /* #define NOTICE_UPDATE_CC(EXP, INSN) */ 2373 2374 /* A list of names to be used for additional modes for condition code values in 2375 registers (*note Jump Patterns::.). These names are added to `enum 2376 machine_mode' and all have class `MODE_CC'. By convention, they should 2377 start with `CC' and end with `mode'. 2378 2379 You should only define this macro if your machine does not use `cc0' and 2380 only if additional modes are required. */ 2381 /* #define EXTRA_CC_MODES */ 2382 2383 /* Returns a mode from class `MODE_CC' to be used when comparison operation 2384 code OP is applied to rtx X and Y. For example, on the SPARC, 2385 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a 2386 description of the reason for this definition) 2387 2388 #define SELECT_CC_MODE(OP,X,Y) \ 2389 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ 2390 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \ 2391 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \ 2392 || GET_CODE (X) == NEG) \ 2393 ? CC_NOOVmode : CCmode)) 2394 2395 You need not define this macro if `EXTRA_CC_MODES' is not defined. */ 2396 /* #define SELECT_CC_MODE(OP, X, Y) */ 2397 2398 /* One some machines not all possible comparisons are defined, but you can 2399 convert an invalid comparison into a valid one. For example, the Alpha does 2400 not have a `GT' comparison, but you can use an `LT' comparison instead and 2401 swap the order of the operands. 2402 2403 On such machines, define this macro to be a C statement to do any required 2404 conversions. CODE is the initial comparison code and OP0 and OP1 are the 2405 left and right operands of the comparison, respectively. You should modify 2406 CODE, OP0, and OP1 as required. 2407 2408 GNU CC will not assume that the comparison resulting from this macro is 2409 valid but will see if the resulting insn matches a pattern in the `md' file. 2410 2411 You need not define this macro if it would never change the comparison code 2412 or operands. */ 2413 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */ 2414 2415 /* A C expression whose value is one if it is always safe to reverse a 2416 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for 2417 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)' 2418 must be zero. 2419 2420 You need not define this macro if it would always returns zero or if the 2421 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For 2422 example, here is the definition used on the SPARC, where floating-point 2423 inequality comparisons are always given `CCFPEmode': 2424 2425 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */ 2426 /* #define REVERSIBLE_CC_MODE(MODE) */ 2427 2428 2429 /* Describing Relative Costs of Operations */ 2430 2431 /* A part of a C `switch' statement that describes the relative costs of 2432 constant RTL expressions. It must contain `case' labels for expression 2433 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'. 2434 Each case must ultimately reach a `return' statement to return the relative 2435 cost of the use of that kind of constant value in an expression. The cost 2436 may depend on the precise value of the constant, which is available for 2437 examination in X, and the rtx code of the expression in which it is 2438 contained, found in OUTER_CODE. 2439 2440 CODE is the expression code--redundant, since it can be obtained with 2441 `GET_CODE (X)'. */ 2442 2443 /* On the d30v, consider operatnds that fit in a short instruction very 2444 cheap. However, at this time, it causes cse to generate incorrect 2445 code, so disable it for now. */ 2446 #if 0 2447 #define CONST_COSTS(X, CODE, OUTER_CODE) \ 2448 case CONST_INT: \ 2449 if (IN_RANGE_P (INTVAL (X), 0, 31)) \ 2450 return 0; \ 2451 else if ((OUTER_CODE) == LEU && (OUTER_CODE) == LTU \ 2452 && (OUTER_CODE) == GEU && (OUTER_CODE) == GTU) \ 2453 return IN_RANGE_P (INTVAL (X), 32, 63) ? 0 : COSTS_N_INSNS (2); \ 2454 else \ 2455 return IN_RANGE_P (INTVAL (X), -31, -1) ? 0 : COSTS_N_INSNS (2); \ 2456 case SYMBOL_REF: \ 2457 case LABEL_REF: \ 2458 case CONST: \ 2459 return COSTS_N_INSNS (2); \ 2460 case CONST_DOUBLE: \ 2461 return COSTS_N_INSNS ((GET_MODE (X) == SFmode) ? 2 : 4); 2462 #else 2463 #define CONST_COSTS(X, CODE, OUTER_CODE) 2464 #endif 2465 2466 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be 2467 used, for example, to indicate how costly a multiply instruction is. In 2468 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify 2469 a cost equal to N fast instructions. OUTER_CODE is the code of the 2470 expression in which X is contained. 2471 2472 This macro is optional; do not define it if the default cost assumptions are 2473 adequate for the target machine. */ 2474 #define RTX_COSTS(X, CODE, OUTER_CODE) \ 2475 case MULT: \ 2476 return COSTS_N_INSNS ((GET_CODE (XEXP (x, 1)) == CONST_INT \ 2477 && exact_log2 (INTVAL (XEXP (x, 1))) >= 0) \ 2478 ? 1 : 2); 2479 2480 /* An expression giving the cost of an addressing mode that contains ADDRESS. 2481 If not defined, the cost is computed from the ADDRESS expression and the 2482 `CONST_COSTS' values. 2483 2484 For most CISC machines, the default cost is a good approximation of the true 2485 cost of the addressing mode. However, on RISC machines, all instructions 2486 normally have the same length and execution time. Hence all addresses will 2487 have equal costs. 2488 2489 In cases where more than one form of an address is known, the form with the 2490 lowest cost will be used. If multiple forms have the same, lowest, cost, 2491 the one that is the most complex will be used. 2492 2493 For example, suppose an address that is equal to the sum of a register and a 2494 constant is used twice in the same basic block. When this macro is not 2495 defined, the address will be computed in a register and memory references 2496 will be indirect through that register. On machines where the cost of the 2497 addressing mode containing the sum is no higher than that of a simple 2498 indirect reference, this will produce an additional instruction and possibly 2499 require an additional register. Proper specification of this macro 2500 eliminates this overhead for such machines. 2501 2502 Similar use of this macro is made in strength reduction of loops. 2503 2504 ADDRESS need not be valid as an address. In such a case, the cost is not 2505 relevant and can be any value; invalid addresses need not be assigned a 2506 different cost. 2507 2508 On machines where an address involving more than one register is as cheap as 2509 an address computation involving only one register, defining `ADDRESS_COST' 2510 to reflect this can cause two registers to be live over a region of code 2511 where only one would have been if `ADDRESS_COST' were not defined in that 2512 manner. This effect should be considered in the definition of this macro. 2513 Equivalent costs should probably only be given to addresses with different 2514 numbers of registers on machines with lots of registers. 2515 2516 This macro will normally either not be defined or be defined as a constant. */ 2517 #define ADDRESS_COST(ADDRESS) 0 2518 2519 /* A C expression for the cost of moving data from a register in class FROM to 2520 one in class TO. The classes are expressed using the enumeration values 2521 such as `GENERAL_REGS'. A value of 4 is the default; other values are 2522 interpreted relative to that. 2523 2524 It is not required that the cost always equal 2 when FROM is the same as TO; 2525 on some machines it is expensive to move between registers if they are not 2526 general registers. 2527 2528 If reload sees an insn consisting of a single `set' between two hard 2529 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a 2530 value of 2, reload does not check to ensure that the constraints of the insn 2531 are met. Setting a cost of other than 2 will allow reload to verify that 2532 the constraints are met. You should do this if the `movM' pattern's 2533 constraints do not allow such copying. */ 2534 2535 #define REGISTER_MOVE_COST(MODE, FROM, TO) \ 2536 (((FROM) != GPR_REGS && (FROM) != EVEN_REGS \ 2537 && (TO) != GPR_REGS && (TO) != EVEN_REGS) ? 4 : 2) 2538 2539 /* A C expression for the cost of moving data of mode M between a register and 2540 memory. A value of 2 is the default; this cost is relative to those in 2541 `REGISTER_MOVE_COST'. 2542 2543 If moving between registers and memory is more expensive than between two 2544 registers, you should define this macro to express the relative cost. */ 2545 #define MEMORY_MOVE_COST(M,C,I) 4 2546 2547 /* A C expression for the cost of a branch instruction. A value of 1 is the 2548 default; other values are interpreted relative to that. */ 2549 2550 #define BRANCH_COST d30v_branch_cost 2551 2552 #define D30V_DEFAULT_BRANCH_COST 2 2553 2554 /* Values of the -mbranch-cost=n string. */ 2555 extern int d30v_branch_cost; 2556 extern const char *d30v_branch_cost_string; 2557 2558 /* Here are additional macros which do not specify precise relative costs, but 2559 only that certain actions are more expensive than GNU CC would ordinarily 2560 expect. */ 2561 2562 /* Define this macro as a C expression which is nonzero if accessing less than 2563 a word of memory (i.e. a `char' or a `short') is no faster than accessing a 2564 word of memory, i.e., if such access require more than one instruction or if 2565 there is no difference in cost between byte and (aligned) word loads. 2566 2567 When this macro is not defined, the compiler will access a field by finding 2568 the smallest containing object; when it is defined, a fullword load will be 2569 used if alignment permits. Unless bytes accesses are faster than word 2570 accesses, using word accesses is preferable since it may eliminate 2571 subsequent memory access if subsequent accesses occur to other fields in the 2572 same word of the structure, but to different bytes. */ 2573 #define SLOW_BYTE_ACCESS 1 2574 2575 /* Define this macro to be the value 1 if unaligned accesses have a cost many 2576 times greater than aligned accesses, for example if they are emulated in a 2577 trap handler. 2578 2579 When this macro is nonzero, the compiler will act as if `STRICT_ALIGNMENT' 2580 were nonzero when generating code for block moves. This can cause 2581 significantly more instructions to be produced. Therefore, do not set this 2582 macro nonzero if unaligned accesses only add a cycle or two to the time for 2583 a memory access. 2584 2585 If the value of this macro is always zero, it need not be defined. */ 2586 /* #define SLOW_UNALIGNED_ACCESS */ 2587 2588 /* Define this macro to inhibit strength reduction of memory addresses. (On 2589 some machines, such strength reduction seems to do harm rather than good.) */ 2590 /* #define DONT_REDUCE_ADDR */ 2591 2592 /* The number of scalar move insns which should be generated instead of a 2593 string move insn or a library call. Increasing the value will always make 2594 code faster, but eventually incurs high cost in increased code size. 2595 2596 If you don't define this, a reasonable default is used. */ 2597 /* #define MOVE_RATIO */ 2598 2599 /* Define this macro if it is as good or better to call a constant function 2600 address than to call an address kept in a register. */ 2601 #define NO_FUNCTION_CSE 2602 2603 /* Define this macro if it is as good or better for a function to call itself 2604 with an explicit address than to call an address kept in a register. */ 2605 /* #define NO_RECURSIVE_FUNCTION_CSE */ 2606 2607 2608 /* Dividing the output into sections. */ 2609 2610 /* A C expression whose value is a string containing the assembler operation 2611 that should precede instructions and read-only data. Normally `".text"' is 2612 right. */ 2613 #define TEXT_SECTION_ASM_OP "\t.text" 2614 2615 /* A C expression whose value is a string containing the assembler operation to 2616 identify the following data as writable initialized data. Normally 2617 `".data"' is right. */ 2618 #define DATA_SECTION_ASM_OP "\t.data" 2619 2620 /* if defined, a C expression whose value is a string containing the assembler 2621 operation to identify the following data as shared data. If not defined, 2622 `DATA_SECTION_ASM_OP' will be used. */ 2623 /* #define SHARED_SECTION_ASM_OP */ 2624 2625 /* If defined, a C expression whose value is a string containing the 2626 assembler operation to identify the following data as 2627 uninitialized global data. If not defined, and neither 2628 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 2629 uninitialized global data will be output in the data section if 2630 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 2631 used. */ 2632 #define BSS_SECTION_ASM_OP "\t.section .bss" 2633 2634 /* If defined, a C expression whose value is a string containing the 2635 assembler operation to identify the following data as 2636 uninitialized global shared data. If not defined, and 2637 `BSS_SECTION_ASM_OP' is, the latter will be used. */ 2638 /* #define SHARED_BSS_SECTION_ASM_OP */ 2639 2640 /* A list of names for sections other than the standard two, which are 2641 `in_text' and `in_data'. You need not define this macro on a system with no 2642 other sections (that GCC needs to use). 2643 2644 Defined in svr4.h. */ 2645 /* #define EXTRA_SECTIONS */ 2646 2647 /* One or more functions to be defined in `varasm.c'. These functions should 2648 do jobs analogous to those of `text_section' and `data_section', for your 2649 additional sections. Do not define this macro if you do not define 2650 `EXTRA_SECTIONS'. 2651 2652 Defined in svr4.h. */ 2653 /* #define EXTRA_SECTION_FUNCTIONS */ 2654 2655 /* Define this macro if jump tables (for `tablejump' insns) should be output in 2656 the text section, along with the assembler instructions. Otherwise, the 2657 readonly data section is used. 2658 2659 This macro is irrelevant if there is no separate readonly data section. */ 2660 /* #define JUMP_TABLES_IN_TEXT_SECTION */ 2661 2662 /* Position Independent Code. */ 2663 2664 /* The register number of the register used to address a table of static data 2665 addresses in memory. In some cases this register is defined by a 2666 processor's "application binary interface" (ABI). When this macro is 2667 defined, RTL is generated for this register once, as with the stack pointer 2668 and frame pointer registers. If this macro is not defined, it is up to the 2669 machine-dependent files to allocate such a register (if necessary). */ 2670 /* #define PIC_OFFSET_TABLE_REGNUM */ 2671 2672 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is 2673 clobbered by calls. Do not define this macro if `PIC_OFFSET_TABLE_REGNUM' 2674 is not defined. */ 2675 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */ 2676 2677 /* By generating position-independent code, when two different programs (A and 2678 B) share a common library (libC.a), the text of the library can be shared 2679 whether or not the library is linked at the same address for both programs. 2680 In some of these environments, position-independent code requires not only 2681 the use of different addressing modes, but also special code to enable the 2682 use of these addressing modes. 2683 2684 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once 2685 the function is being compiled into assembly code, but not before. (It is 2686 not done before, because in the case of compiling an inline function, it 2687 would lead to multiple PIC prologues being included in functions which used 2688 inline functions and were compiled to assembly language.) */ 2689 /* #define FINALIZE_PIC */ 2690 2691 /* A C expression that is nonzero if X is a legitimate immediate operand on the 2692 target machine when generating position independent code. You can assume 2693 that X satisfies `CONSTANT_P', so you need not check this. You can also 2694 assume FLAG_PIC is true, so you need not check it either. You need not 2695 define this macro if all constants (including `SYMBOL_REF') can be immediate 2696 operands when generating position independent code. */ 2697 /* #define LEGITIMATE_PIC_OPERAND_P(X) */ 2698 2699 2700 /* The Overall Framework of an Assembler File. */ 2701 2702 /* A C expression which outputs to the stdio stream STREAM some appropriate 2703 text to go at the start of an assembler file. 2704 2705 Normally this macro is defined to output a line containing `#NO_APP', which 2706 is a comment that has no effect on most assemblers but tells the GNU 2707 assembler that it can save time by not checking for certain assembler 2708 constructs. 2709 2710 On systems that use SDB, it is necessary to output certain commands; see 2711 `attasm.h'. 2712 2713 Defined in svr4.h. */ 2714 2715 /* #define ASM_FILE_START(STREAM) \ 2716 output_file_directive ((STREAM), main_input_filename) */ 2717 2718 /* A C expression which outputs to the stdio stream STREAM some appropriate 2719 text to go at the end of an assembler file. 2720 2721 If this macro is not defined, the default is to output nothing special at 2722 the end of the file. Most systems don't require any definition. 2723 2724 On systems that use SDB, it is necessary to output certain commands; see 2725 `attasm.h'. 2726 2727 Defined in svr4.h. */ 2728 /* #define ASM_FILE_END(STREAM) */ 2729 2730 /* A C string constant describing how to begin a comment in the target 2731 assembler language. The compiler assumes that the comment will end at the 2732 end of the line. */ 2733 #define ASM_COMMENT_START ";" 2734 2735 /* A C string constant for text to be output before each `asm' statement or 2736 group of consecutive ones. Normally this is `"#APP"', which is a comment 2737 that has no effect on most assemblers but tells the GNU assembler that it 2738 must check the lines that follow for all valid assembler constructs. */ 2739 #define ASM_APP_ON "#APP\n" 2740 2741 /* A C string constant for text to be output after each `asm' statement or 2742 group of consecutive ones. Normally this is `"#NO_APP"', which tells the 2743 GNU assembler to resume making the time-saving assumptions that are valid 2744 for ordinary compiler output. */ 2745 #define ASM_APP_OFF "#NO_APP\n" 2746 2747 /* A C statement to output COFF information or DWARF debugging information 2748 which indicates that filename NAME is the current source file to the stdio 2749 stream STREAM. 2750 2751 This macro need not be defined if the standard form of output for the file 2752 format in use is appropriate. */ 2753 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */ 2754 2755 /* A C statement to output DBX or SDB debugging information before code for 2756 line number LINE of the current source file to the stdio stream STREAM. 2757 2758 This macro need not be defined if the standard form of debugging information 2759 for the debugger in use is appropriate. 2760 2761 Defined in svr4.h. */ 2762 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */ 2763 2764 /* A C statement to output something to the assembler file to handle a `#ident' 2765 directive containing the text STRING. If this macro is not defined, nothing 2766 is output for a `#ident' directive. 2767 2768 Defined in svr4.h. */ 2769 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */ 2770 2771 /* A C statement to output any assembler statements which are required to 2772 precede any Objective-C object definitions or message sending. The 2773 statement is executed only when compiling an Objective-C program. */ 2774 /* #define OBJC_PROLOGUE */ 2775 2776 2777 /* Output of Data. */ 2778 2779 /* A C statement to output to the stdio stream STREAM an assembler instruction 2780 to assemble a string constant containing the LEN bytes at PTR. PTR will be 2781 a C expression of type `char *' and LEN a C expression of type `int'. 2782 2783 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix 2784 assembler, do not define the macro `ASM_OUTPUT_ASCII'. 2785 2786 Defined in svr4.h. */ 2787 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */ 2788 2789 /* You may define this macro as a C expression. You should define the 2790 expression to have a nonzero value if GNU CC should output the 2791 constant pool for a function before the code for the function, or 2792 a zero value if GNU CC should output the constant pool after the 2793 function. If you do not define this macro, the usual case, GNU CC 2794 will output the constant pool before the function. */ 2795 /* #define CONSTANT_POOL_BEFORE_FUNCTION */ 2796 2797 /* A C statement to output assembler commands to define the start of the 2798 constant pool for a function. FUNNAME is a string giving the name of the 2799 function. Should the return type of the function be required, it can be 2800 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that 2801 will be written immediately after this call. 2802 2803 If no constant-pool prefix is required, the usual case, this macro need not 2804 be defined. */ 2805 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */ 2806 2807 /* A C statement (with or without semicolon) to output a constant in the 2808 constant pool, if it needs special treatment. (This macro need not do 2809 anything for RTL expressions that can be output normally.) 2810 2811 The argument FILE is the standard I/O stream to output the assembler code 2812 on. X is the RTL expression for the constant to output, and MODE is the 2813 machine mode (in case X is a `const_int'). ALIGN is the required alignment 2814 for the value X; you should output an assembler directive to force this much 2815 alignment. 2816 2817 The argument LABELNO is a number to use in an internal label for the address 2818 of this pool entry. The definition of this macro is responsible for 2819 outputting the label definition at the proper place. Here is how to do 2820 this: 2821 2822 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO); 2823 2824 When you output a pool entry specially, you should end with a `goto' to the 2825 label JUMPTO. This will prevent the same pool entry from being output a 2826 second time in the usual manner. 2827 2828 You need not define this macro if it would do nothing. */ 2829 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */ 2830 2831 /* Define this macro as a C expression which is nonzero if the constant EXP, of 2832 type `tree', should be output after the code for a function. The compiler 2833 will normally output all constants before the function; you need not define 2834 this macro if this is OK. */ 2835 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */ 2836 2837 /* A C statement to output assembler commands to at the end of the constant 2838 pool for a function. FUNNAME is a string giving the name of the function. 2839 Should the return type of the function be required, you can obtain it via 2840 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote 2841 immediately before this call. 2842 2843 If no constant-pool epilogue is required, the usual case, you need not 2844 define this macro. */ 2845 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */ 2846 2847 /* Define this macro as a C expression which is nonzero if C is used as a 2848 logical line separator by the assembler. 2849 2850 If you do not define this macro, the default is that only the character `;' 2851 is treated as a logical line separator. */ 2852 /* #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) */ 2853 2854 /* These macros are provided by `real.h' for writing the definitions of 2855 `ASM_OUTPUT_DOUBLE' and the like: */ 2856 2857 2858 /* Output of Uninitialized Variables. */ 2859 2860 /* A C statement (sans semicolon) to output to the stdio stream STREAM the 2861 assembler definition of a common-label named NAME whose size is SIZE bytes. 2862 The variable ROUNDED is the size rounded up to whatever alignment the caller 2863 wants. 2864 2865 Use the expression `assemble_name (STREAM, NAME)' to output the name itself; 2866 before and after that, output the additional assembler syntax for defining 2867 the name, and a newline. 2868 2869 This macro controls how the assembler definitions of uninitialized global 2870 variables are output. */ 2871 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */ 2872 2873 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate, 2874 explicit argument. If you define this macro, it is used in place of 2875 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required 2876 alignment of the variable. The alignment is specified as the number of 2877 bits. 2878 2879 Defined in svr4.h. */ 2880 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */ 2881 2882 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument - 2883 the DECL of the variable to be output, if there is one. This macro can be 2884 called with DECL == NULL_TREE. If you define this macro, it is used in 2885 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you 2886 more flexibility in handling the destination of the variable. */ 2887 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */ 2888 2889 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used 2890 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */ 2891 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */ 2892 2893 /* A C statement (sans semicolon) to output to the stdio stream STREAM the 2894 assembler definition of uninitialized global DECL named NAME whose size is 2895 SIZE bytes. The variable ROUNDED is the size rounded up to whatever 2896 alignment the caller wants. 2897 2898 Try to use function `asm_output_bss' defined in `varasm.c' when defining 2899 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to 2900 output the name itself; before and after that, output the additional 2901 assembler syntax for defining the name, and a newline. 2902 2903 This macro controls how the assembler definitions of uninitialized global 2904 variables are output. This macro exists to properly support languages like 2905 `c++' which do not have `common' data. However, this macro currently is not 2906 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not 2907 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or 2908 `ASM_OUTPUT_DECL_COMMON' is used. */ 2909 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */ 2910 2911 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate, 2912 explicit argument. If you define this macro, it is used in place of 2913 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required 2914 alignment of the variable. The alignment is specified as the number of 2915 bits. 2916 2917 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when 2918 defining this macro. */ 2919 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */ 2920 2921 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when 2922 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */ 2923 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */ 2924 2925 /* A C statement (sans semicolon) to output to the stdio stream STREAM the 2926 assembler definition of a local-common-label named NAME whose size is SIZE 2927 bytes. The variable ROUNDED is the size rounded up to whatever alignment 2928 the caller wants. 2929 2930 Use the expression `assemble_name (STREAM, NAME)' to output the name itself; 2931 before and after that, output the additional assembler syntax for defining 2932 the name, and a newline. 2933 2934 This macro controls how the assembler definitions of uninitialized static 2935 variables are output. */ 2936 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */ 2937 2938 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate, 2939 explicit argument. If you define this macro, it is used in place of 2940 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required 2941 alignment of the variable. The alignment is specified as the number of 2942 bits. 2943 2944 Defined in svr4.h. */ 2945 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */ 2946 2947 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional 2948 parameter - the DECL of variable to be output, if there is one. 2949 This macro can be called with DECL == NULL_TREE. If you define 2950 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and 2951 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in 2952 handling the destination of the variable. */ 2953 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */ 2954 2955 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when 2956 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */ 2957 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */ 2958 2959 2960 /* Output and Generation of Labels. */ 2961 2962 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text 2963 necessary for declaring the name NAME of a function which is being defined. 2964 This macro is responsible for outputting the label definition (perhaps using 2965 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node 2966 representing the function. 2967 2968 If this macro is not defined, then the function name is defined in the usual 2969 manner as a label (by means of `ASM_OUTPUT_LABEL'). 2970 2971 Defined in svr4.h. */ 2972 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */ 2973 2974 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text 2975 necessary for declaring the size of a function which is being defined. The 2976 argument NAME is the name of the function. The argument DECL is the 2977 `FUNCTION_DECL' tree node representing the function. 2978 2979 If this macro is not defined, then the function size is not defined. 2980 2981 Defined in svr4.h. */ 2982 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */ 2983 2984 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text 2985 necessary for declaring the name NAME of an initialized variable which is 2986 being defined. This macro must output the label definition (perhaps using 2987 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node 2988 representing the variable. 2989 2990 If this macro is not defined, then the variable name is defined in the usual 2991 manner as a label (by means of `ASM_OUTPUT_LABEL'). 2992 2993 Defined in svr4.h. */ 2994 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */ 2995 2996 /* A C statement (sans semicolon) to finish up declaring a variable name once 2997 the compiler has processed its initializer fully and thus has had a chance 2998 to determine the size of an array when controlled by an initializer. This 2999 is used on systems where it's necessary to declare something about the size 3000 of the object. 3001 3002 If you don't define this macro, that is equivalent to defining it to do 3003 nothing. 3004 3005 Defined in svr4.h. */ 3006 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */ 3007 3008 /* Globalizing directive for a label. */ 3009 #define GLOBAL_ASM_OP "\t.globl " 3010 3011 /* A C statement (sans semicolon) to output to the stdio stream STREAM some 3012 commands that will make the label NAME weak; that is, available for 3013 reference from other files but only used if no other definition is 3014 available. Use the expression `assemble_name (STREAM, NAME)' to output the 3015 name itself; before and after that, output the additional assembler syntax 3016 for making that name weak, and a newline. 3017 3018 If you don't define this macro, GNU CC will not support weak symbols and you 3019 should not define the `SUPPORTS_WEAK' macro. 3020 3021 Defined in svr4.h. */ 3022 /* #define ASM_WEAKEN_LABEL */ 3023 3024 /* A C expression which evaluates to true if the target supports weak symbols. 3025 3026 If you don't define this macro, `defaults.h' provides a default definition. 3027 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise, 3028 it is `0'. Define this macro if you want to control weak symbol support 3029 with a compiler flag such as `-melf'. */ 3030 /* #define SUPPORTS_WEAK */ 3031 3032 /* A C statement (sans semicolon) to mark DECL to be emitted as a 3033 public symbol such that extra copies in multiple translation units 3034 will be discarded by the linker. Define this macro if your object 3035 file format provides support for this concept, such as the `COMDAT' 3036 section flags in the Microsoft Windows PE/COFF format, and this 3037 support requires changes to DECL, such as putting it in a separate 3038 section. 3039 3040 Defined in svr4.h. */ 3041 /* #define MAKE_DECL_ONE_ONLY */ 3042 3043 /* A C expression which evaluates to true if the target supports one-only 3044 semantics. 3045 3046 If you don't define this macro, `varasm.c' provides a default definition. 3047 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1'; 3048 otherwise, it is `0'. Define this macro if you want to control one-only 3049 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag 3050 is enough to mark a declaration to be emitted as one-only. */ 3051 /* #define SUPPORTS_ONE_ONLY */ 3052 3053 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text 3054 necessary for declaring the name of an external symbol named NAME which is 3055 referenced in this compilation but not defined. The value of DECL is the 3056 tree node for the declaration. 3057 3058 This macro need not be defined if it does not need to output anything. The 3059 GNU assembler and most Unix assemblers don't require anything. */ 3060 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */ 3061 3062 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to 3063 declare a library function name external. The name of the library function 3064 is given by SYMREF, which has type `rtx' and is a `symbol_ref'. 3065 3066 This macro need not be defined if it does not need to output anything. The 3067 GNU assembler and most Unix assemblers don't require anything. 3068 3069 Defined in svr4.h. */ 3070 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */ 3071 3072 /* A C statement (sans semicolon) to output to the stdio stream STREAM a 3073 reference in assembler syntax to a label named NAME. This should add `_' to 3074 the front of the name, if that is customary on your operating system, as it 3075 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */ 3076 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */ 3077 3078 /* A C statement to output to the stdio stream STREAM a label whose name is 3079 made from the string PREFIX and the number NUM. 3080 3081 It is absolutely essential that these labels be distinct from the labels 3082 used for user-level functions and variables. Otherwise, certain programs 3083 will have name conflicts with internal labels. 3084 3085 It is desirable to exclude internal labels from the symbol table of the 3086 object file. Most assemblers have a naming convention for labels that 3087 should be excluded; on many systems, the letter `L' at the beginning of a 3088 label has this effect. You should find out what convention your system 3089 uses, and follow it. 3090 3091 The usual definition of this macro is as follows: 3092 3093 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM) 3094 3095 Defined in svr4.h. */ 3096 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */ 3097 3098 /* A C statement to store into the string STRING a label whose name is made 3099 from the string PREFIX and the number NUM. 3100 3101 This string, when output subsequently by `assemble_name', should produce the 3102 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX 3103 and NUM. 3104 3105 If the string begins with `*', then `assemble_name' will output the rest of 3106 the string unchanged. It is often convenient for 3107 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't 3108 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and 3109 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your 3110 machine description, so you should know what it does on your machine.) 3111 3112 Defined in svr4.h. */ 3113 3114 /* 3115 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ 3116 do { \ 3117 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \ 3118 } while (0) 3119 */ 3120 3121 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a 3122 newly allocated string made from the string NAME and the number NUMBER, with 3123 some suitable punctuation added. Use `alloca' to get space for the string. 3124 3125 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce 3126 an assembler label for an internal static variable whose name is NAME. 3127 Therefore, the string must be such as to result in valid assembler code. 3128 The argument NUMBER is different each time this macro is executed; it 3129 prevents conflicts between similarly-named internal static variables in 3130 different scopes. 3131 3132 Ideally this string should not be a valid C identifier, to prevent any 3133 conflict with the user's own symbols. Most assemblers allow periods or 3134 percent signs in assembler symbols; putting at least one of these between 3135 the name and the number will suffice. */ 3136 3137 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \ 3138 do { \ 3139 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \ 3140 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \ 3141 } while (0) 3142 3143 /* A C statement to output to the stdio stream STREAM assembler code which 3144 defines (equates) the symbol NAME to have the value VALUE. 3145 3146 If SET_ASM_OP is defined, a default definition is provided which is correct 3147 for most systems. 3148 3149 Defined in svr4.h. */ 3150 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */ 3151 3152 /* A C statement to output to the stdio stream STREAM assembler code which 3153 defines (equates) the weak symbol NAME to have the value VALUE. 3154 3155 Define this macro if the target only supports weak aliases; define 3156 ASM_OUTPUT_DEF instead if possible. */ 3157 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */ 3158 3159 /* Define this macro to override the default assembler names used for Objective 3160 C methods. 3161 3162 The default name is a unique method number followed by the name of the class 3163 (e.g. `_1_Foo'). For methods in categories, the name of the category is 3164 also included in the assembler name (e.g. `_1_Foo_Bar'). 3165 3166 These names are safe on most systems, but make debugging difficult since the 3167 method's selector is not present in the name. Therefore, particular systems 3168 define other ways of computing names. 3169 3170 BUF is an expression of type `char *' which gives you a buffer in which to 3171 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME 3172 put together, plus 50 characters extra. 3173 3174 The argument IS_INST specifies whether the method is an instance method or a 3175 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of 3176 the category (or NULL if the method is not in a category); and SEL_NAME is 3177 the name of the selector. 3178 3179 On systems where the assembler can handle quoted names, you can use this 3180 macro to provide more human-readable names. */ 3181 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */ 3182 3183 3184 /* Macros Controlling Initialization Routines. */ 3185 3186 /* If defined, a C string constant for the assembler operation to identify the 3187 following data as initialization code. If not defined, GNU CC will assume 3188 such a section does not exist. When you are using special sections for 3189 initialization and termination functions, this macro also controls how 3190 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions. 3191 3192 Defined in svr4.h. */ 3193 /* #define INIT_SECTION_ASM_OP */ 3194 3195 /* If defined, `main' will not call `__main' as described above. This macro 3196 should be defined for systems that control the contents of the init section 3197 on a symbol-by-symbol basis, such as OSF/1, and should not be defined 3198 explicitly for systems that support `INIT_SECTION_ASM_OP'. */ 3199 /* #define HAS_INIT_SECTION */ 3200 3201 /* If defined, a C string constant for a switch that tells the linker that the 3202 following symbol is an initialization routine. */ 3203 /* #define LD_INIT_SWITCH */ 3204 3205 /* If defined, a C string constant for a switch that tells the linker that the 3206 following symbol is a finalization routine. */ 3207 /* #define LD_FINI_SWITCH */ 3208 3209 /* If defined, `main' will call `__main' despite the presence of 3210 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the 3211 init section is not actually run automatically, but is still useful for 3212 collecting the lists of constructors and destructors. */ 3213 #define INVOKE__main 3214 3215 /* If your system uses `collect2' as the means of processing constructors, then 3216 that program normally uses `nm' to scan an object file for constructor 3217 functions to be called. On certain kinds of systems, you can define these 3218 macros to make `collect2' work faster (and, in some cases, make it work at 3219 all): */ 3220 3221 /* Define this macro if the system uses COFF (Common Object File Format) object 3222 files, so that `collect2' can assume this format and scan object files 3223 directly for dynamic constructor/destructor functions. */ 3224 /* #define OBJECT_FORMAT_COFF */ 3225 3226 /* Define this macro if the system uses ROSE format object files, so that 3227 `collect2' can assume this format and scan object files directly for dynamic 3228 constructor/destructor functions. 3229 3230 These macros are effective only in a native compiler; `collect2' as 3231 part of a cross compiler always uses `nm' for the target machine. */ 3232 /* #define OBJECT_FORMAT_ROSE */ 3233 3234 /* Define this macro if the system uses ELF format object files. 3235 3236 Defined in svr4.h. */ 3237 /* #define OBJECT_FORMAT_ELF */ 3238 3239 /* Define this macro as a C string constant containing the file name to use to 3240 execute `nm'. The default is to search the path normally for `nm'. 3241 3242 If your system supports shared libraries and has a program to list the 3243 dynamic dependencies of a given library or executable, you can define these 3244 macros to enable support for running initialization and termination 3245 functions in shared libraries: */ 3246 /* #define REAL_NM_FILE_NAME */ 3247 3248 /* Define this macro to a C string constant containing the name of the program 3249 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */ 3250 /* #define LDD_SUFFIX */ 3251 3252 /* Define this macro to be C code that extracts filenames from the output of 3253 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *' 3254 that points to the beginning of a line of output from `LDD_SUFFIX'. If the 3255 line lists a dynamic dependency, the code must advance PTR to the beginning 3256 of the filename on that line. Otherwise, it must set PTR to `NULL'. */ 3257 /* #define PARSE_LDD_OUTPUT (PTR) */ 3258 3259 3260 /* Output of Assembler Instructions. */ 3261 3262 /* A C initializer containing the assembler's names for the machine registers, 3263 each one as a C string constant. This is what translates register numbers 3264 in the compiler into assembler language. */ 3265 #define REGISTER_NAMES \ 3266 { \ 3267 "r0", "r1", "r2", "r3", \ 3268 "r4", "r5", "r6", "r7", \ 3269 "r8", "r9", "r10", "r11", \ 3270 "r12", "r13", "r14", "r15", \ 3271 "r16", "r17", "r18", "r19", \ 3272 "r20", "r21", "r22", "r23", \ 3273 "r24", "r25", "r26", "r27", \ 3274 "r28", "r29", "r30", "r31", \ 3275 "r32", "r33", "r34", "r35", \ 3276 "r36", "r37", "r38", "r39", \ 3277 "r40", "r41", "r42", "r43", \ 3278 "r44", "r45", "r46", "r47", \ 3279 "r48", "r49", "r50", "r51", \ 3280 "r52", "r53", "r54", "r55", \ 3281 "r56", "r57", "r58", "r59", \ 3282 "r60", "r61", "link", "sp", \ 3283 "ap", \ 3284 "f0", "f1", "f2", "f3", \ 3285 "s", "v", "va", "c", \ 3286 "a0", "a1", \ 3287 "psw", "bpsw", "pc", "bpc", \ 3288 "dpsw", "dpc", "rpt_c", "rpt_s", \ 3289 "rpt_e", "mod_s", "mod_e", "iba", \ 3290 "eit_vb", "int_s", "int_m", \ 3291 } 3292 3293 /* If defined, a C initializer for an array of structures containing a name and 3294 a register number. This macro defines additional names for hard registers, 3295 thus allowing the `asm' option in declarations to refer to registers using 3296 alternate names. */ 3297 #define ADDITIONAL_REGISTER_NAMES \ 3298 { \ 3299 {"r62", GPR_LINK}, \ 3300 {"r63", GPR_SP}, \ 3301 {"f4", FLAG_SAT}, \ 3302 {"f5", FLAG_OVERFLOW}, \ 3303 {"f6", FLAG_ACC_OVER}, \ 3304 {"f7", FLAG_CARRY}, \ 3305 {"carry", FLAG_CARRY}, \ 3306 {"borrow", FLAG_BORROW}, \ 3307 {"b", FLAG_BORROW}, \ 3308 {"cr0", CR_PSW}, \ 3309 {"cr1", CR_BPSW}, \ 3310 {"cr2", CR_PC}, \ 3311 {"cr3", CR_BPC}, \ 3312 {"cr4", CR_DPSW}, \ 3313 {"cr5", CR_DPC}, \ 3314 {"cr7", CR_RPT_C}, \ 3315 {"cr8", CR_RPT_S}, \ 3316 {"cr9", CR_RPT_E}, \ 3317 {"cr10", CR_MOD_S}, \ 3318 {"cr11", CR_MOD_E}, \ 3319 {"cr14", CR_IBA}, \ 3320 {"cr15", CR_EIT_VB}, \ 3321 {"cr16", CR_INT_S}, \ 3322 {"cr17", CR_INT_M} \ 3323 } 3324 3325 /* Define this macro if you are using an unusual assembler that requires 3326 different names for the machine instructions. 3327 3328 The definition is a C statement or statements which output an assembler 3329 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a 3330 variable of type `char *' which points to the opcode name in its "internal" 3331 form--the form that is written in the machine description. The definition 3332 should output the opcode name to STREAM, performing any translation you 3333 desire, and increment the variable PTR to point at the end of the opcode so 3334 that it will not be output twice. 3335 3336 In fact, your macro definition may process less than the entire opcode name, 3337 or more than the opcode name; but if you want to process text that includes 3338 `%'-sequences to substitute operands, you must take care of the substitution 3339 yourself. Just be sure to increment PTR over whatever text should not be 3340 output normally. 3341 3342 If you need to look at the operand values, they can be found as the elements 3343 of `recog_data.operand'. 3344 3345 If the macro definition does nothing, the instruction is output in the usual 3346 way. */ 3347 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */ 3348 3349 /* If defined, a C statement to be executed just prior to the output of 3350 assembler code for INSN, to modify the extracted operands so they will be 3351 output differently. 3352 3353 Here the argument OPVEC is the vector containing the operands extracted from 3354 INSN, and NOPERANDS is the number of elements of the vector which contain 3355 meaningful data for this insn. The contents of this vector are what will be 3356 used to convert the insn template into assembler code, so you can change the 3357 assembler output by changing the contents of the vector. 3358 3359 This macro is useful when various assembler syntaxes share a single file of 3360 instruction patterns; by defining this macro differently, you can cause a 3361 large class of instructions to be output differently (such as with 3362 rearranged operands). Naturally, variations in assembler syntax affecting 3363 individual insn patterns ought to be handled by writing conditional output 3364 routines in those patterns. 3365 3366 If this macro is not defined, it is equivalent to a null statement. */ 3367 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */ 3368 3369 /* If defined, `FINAL_PRESCAN_INSN' will be called on each 3370 `CODE_LABEL'. In that case, OPVEC will be a null pointer and 3371 NOPERANDS will be zero. */ 3372 /* #define FINAL_PRESCAN_LABEL */ 3373 3374 /* A C compound statement to output to stdio stream STREAM the assembler syntax 3375 for an instruction operand X. X is an RTL expression. 3376 3377 CODE is a value that can be used to specify one of several ways of printing 3378 the operand. It is used when identical operands must be printed differently 3379 depending on the context. CODE comes from the `%' specification that was 3380 used to request printing of the operand. If the specification was just 3381 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is 3382 the ASCII code for LTR. 3383 3384 If X is a register, this macro should print the register's name. The names 3385 can be found in an array `reg_names' whose type is `char *[]'. `reg_names' 3386 is initialized from `REGISTER_NAMES'. 3387 3388 When the machine description has a specification `%PUNCT' (a `%' followed by 3389 a punctuation character), this macro is called with a null pointer for X and 3390 the punctuation character for CODE. 3391 3392 Standard operand flags that are handled elsewhere: 3393 `=' Output a number unique to each instruction in the compilation. 3394 `a' Substitute an operand as if it were a memory reference. 3395 `c' Omit the syntax that indicates an immediate operand. 3396 `l' Substitute a LABEL_REF into a jump instruction. 3397 `n' Like %cDIGIT, except negate the value before printing. 3398 3399 The d30v specific operand flags are: 3400 `.' Print r0. 3401 `f' Print a SF constant as an int. 3402 `s' Subtract 32 and negate. 3403 `A' Print accumulator number without an `a' in front of it. 3404 `B' Print bit offset for BSET, etc. instructions. 3405 `E' Print u if this is zero extend, nothing if this is sign extend. 3406 `F' Emit /{f,t,x}{f,t,x} for executing a false condition. 3407 `L' Print the lower half of a 64 bit item. 3408 `M' Print a memory reference for ld/st instructions. 3409 `R' Return appropriate cmp instruction for relational test. 3410 `S' Subtract 32. 3411 `T' Emit /{f,t,x}{f,t,x} for executing a true condition. 3412 `U' Print the upper half of a 64 bit item. */ 3413 3414 #define PRINT_OPERAND(STREAM, X, CODE) d30v_print_operand (STREAM, X, CODE) 3415 3416 /* A C expression which evaluates to true if CODE is a valid punctuation 3417 character for use in the `PRINT_OPERAND' macro. If 3418 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation 3419 characters (except for the standard one, `%') are used in this way. */ 3420 3421 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == ':') 3422 3423 /* A C compound statement to output to stdio stream STREAM the assembler syntax 3424 for an instruction operand that is a memory reference whose address is X. X 3425 is an RTL expression. */ 3426 3427 #define PRINT_OPERAND_ADDRESS(STREAM, X) d30v_print_operand_address (STREAM, X) 3428 3429 /* A C statement, to be executed after all slot-filler instructions have been 3430 output. If necessary, call `dbr_sequence_length' to determine the number of 3431 slots filled in a sequence (zero if not currently outputting a sequence), to 3432 decide how many no-ops to output, or whatever. 3433 3434 Don't define this macro if it has nothing to do, but it is helpful in 3435 reading assembly output if the extent of the delay sequence is made explicit 3436 (e.g. with white space). 3437 3438 Note that output routines for instructions with delay slots must be prepared 3439 to deal with not being output as part of a sequence (i.e. when the 3440 scheduling pass is not run, or when no slot fillers could be found.) The 3441 variable `final_sequence' is null when not processing a sequence, otherwise 3442 it contains the `sequence' rtx being output. */ 3443 /* #define DBR_OUTPUT_SEQEND(FILE) */ 3444 3445 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and 3446 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a 3447 single `md' file must support multiple assembler formats. In that case, the 3448 various `tm.h' files can define these macros differently. 3449 3450 USER_LABEL_PREFIX is defined in svr4.h. */ 3451 3452 #define REGISTER_PREFIX "%" 3453 #define LOCAL_LABEL_PREFIX "." 3454 #define USER_LABEL_PREFIX "" 3455 #define IMMEDIATE_PREFIX "" 3456 3457 /* If your target supports multiple dialects of assembler language (such as 3458 different opcodes), define this macro as a C expression that gives the 3459 numeric index of the assembler language dialect to use, with zero as the 3460 first variant. 3461 3462 If this macro is defined, you may use `{option0|option1|option2...}' 3463 constructs in the output templates of patterns (*note Output Template::.) or 3464 in the first argument of `asm_fprintf'. This construct outputs `option0', 3465 `option1' or `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero, 3466 one or two, etc. Any special characters within these strings retain their 3467 usual meaning. 3468 3469 If you do not define this macro, the characters `{', `|' and `}' do not have 3470 any special meaning when used in templates or operands to `asm_fprintf'. 3471 3472 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX', 3473 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations 3474 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT' 3475 and use the `{option0|option1}' syntax if the syntax variant are larger and 3476 involve such things as different opcodes or operand order. */ 3477 /* #define ASSEMBLER_DIALECT */ 3478 3479 /* A C expression to output to STREAM some assembler code which will push hard 3480 register number REGNO onto the stack. The code need not be optimal, since 3481 this macro is used only when profiling. */ 3482 /* #define ASM_OUTPUT_REG_PUSH (STREAM, REGNO) */ 3483 3484 /* A C expression to output to STREAM some assembler code which will pop hard 3485 register number REGNO off of the stack. The code need not be optimal, since 3486 this macro is used only when profiling. */ 3487 /* #define ASM_OUTPUT_REG_POP (STREAM, REGNO) */ 3488 3489 3490 /* Output of dispatch tables. */ 3491 3492 /* This macro should be provided on machines where the addresses in a dispatch 3493 table are relative to the table's own address. 3494 3495 The definition should be a C statement to output to the stdio stream STREAM 3496 an assembler pseudo-instruction to generate a difference between two labels. 3497 VALUE and REL are the numbers of two internal labels. The definitions of 3498 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be 3499 printed in the same way here. For example, 3500 3501 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */ 3502 3503 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ 3504 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL) 3505 3506 /* This macro should be provided on machines where the addresses in a dispatch 3507 table are absolute. 3508 3509 The definition should be a C statement to output to the stdio stream STREAM 3510 an assembler pseudo-instruction to generate a reference to a label. VALUE 3511 is the number of an internal label whose definition is output using 3512 `ASM_OUTPUT_INTERNAL_LABEL'. For example, 3513 3514 fprintf (STREAM, "\t.word L%d\n", VALUE) */ 3515 3516 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ 3517 fprintf (STREAM, "\t.word .L%d\n", VALUE) 3518 3519 /* Define this if the label before a jump-table needs to be output specially. 3520 The first three arguments are the same as for `ASM_OUTPUT_INTERNAL_LABEL'; 3521 the fourth argument is the jump-table which follows (a `jump_insn' 3522 containing an `addr_vec' or `addr_diff_vec'). 3523 3524 This feature is used on system V to output a `swbeg' statement for the 3525 table. 3526 3527 If this macro is not defined, these labels are output with 3528 `ASM_OUTPUT_INTERNAL_LABEL'. 3529 3530 Defined in svr4.h. */ 3531 /* #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) */ 3532 3533 /* Define this if something special must be output at the end of a jump-table. 3534 The definition should be a C statement to be executed after the assembler 3535 code for the table is written. It should write the appropriate code to 3536 stdio stream STREAM. The argument TABLE is the jump-table insn, and NUM is 3537 the label-number of the preceding label. 3538 3539 If this macro is not defined, nothing special is output at the end of the 3540 jump-table. */ 3541 /* #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) */ 3542 3543 3544 /* Assembler Commands for Exception Regions. */ 3545 3546 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it 3547 does not contain any extraneous set bits in it. */ 3548 /* #define MASK_RETURN_ADDR */ 3549 3550 /* Define this macro to 0 if your target supports DWARF 2 frame unwind 3551 information, but it does not yet work with exception handling. Otherwise, 3552 if your target supports this information (if it defines 3553 `INCOMING_RETURN_ADDR_RTX'), GCC will provide a default definition of 1. 3554 3555 If this macro is defined to 1, the DWARF 2 unwinder will be the default 3556 exception handling mechanism; otherwise, setjmp/longjmp will be used by 3557 default. 3558 3559 If this macro is defined to anything, the DWARF 2 unwinder will be used 3560 instead of inline unwinders and __unwind_function in the non-setjmp case. */ 3561 /* #define DWARF2_UNWIND_INFO */ 3562 3563 3564 /* Assembler Commands for Alignment. */ 3565 3566 /* The alignment (log base 2) to put in front of LABEL, which follows 3567 a BARRIER. 3568 3569 This macro need not be defined if you don't want any special alignment to be 3570 done at such a time. Most machine descriptions do not currently define the 3571 macro. */ 3572 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */ 3573 3574 /* The desired alignment for the location counter at the beginning 3575 of a loop. 3576 3577 This macro need not be defined if you don't want any special alignment to be 3578 done at such a time. Most machine descriptions do not currently define the 3579 macro. */ 3580 /* #define LOOP_ALIGN(LABEL) */ 3581 3582 /* A C statement to output to the stdio stream STREAM an assembler instruction 3583 to advance the location counter by NBYTES bytes. Those bytes should be zero 3584 when loaded. NBYTES will be a C expression of type `int'. 3585 3586 Defined in svr4.h. */ 3587 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \ 3588 fprintf (STREAM, "\t.zero\t%u\n", (NBYTES)) */ 3589 3590 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text 3591 section because it fails put zeros in the bytes that are skipped. This is 3592 true on many Unix systems, where the pseudo-op to skip bytes produces no-op 3593 instructions rather than zeros when used in the text section. */ 3594 /* #define ASM_NO_SKIP_IN_TEXT */ 3595 3596 /* A C statement to output to the stdio stream STREAM an assembler command to 3597 advance the location counter to a multiple of 2 to the POWER bytes. POWER 3598 will be a C expression of type `int'. */ 3599 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 3600 fprintf ((STREAM), "\t.p2align %d\n", (POWER)) 3601 3602 3603 /* Macros Affecting all Debug Formats. */ 3604 3605 /* A C expression that returns the DBX register number for the compiler 3606 register number REGNO. In simple cases, the value of this expression may be 3607 REGNO itself. But sometimes there are some registers that the compiler 3608 knows about and DBX does not, or vice versa. In such cases, some register 3609 may need to have one number in the compiler and another for DBX. 3610 3611 If two registers have consecutive numbers inside GNU CC, and they can be 3612 used as a pair to hold a multiword value, then they *must* have consecutive 3613 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers 3614 will be unable to access such a pair, because they expect register pairs to 3615 be consecutive in their own numbering scheme. 3616 3617 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not 3618 preserve register pairs, then what you must do instead is redefine the 3619 actual register numbering scheme. */ 3620 #define DBX_REGISTER_NUMBER(REGNO) \ 3621 (GPR_P (REGNO) ? ((REGNO) - GPR_FIRST) \ 3622 : ACCUM_P (REGNO) ? ((REGNO) - ACCUM_FIRST + 84) \ 3623 : FLAG_P (REGNO) ? 66 /* return psw for all flags */ \ 3624 : (REGNO) == ARG_POINTER_REGNUM ? (GPR_SP - GPR_FIRST) \ 3625 : (REGNO) == CR_PSW ? (66 + 0) \ 3626 : (REGNO) == CR_BPSW ? (66 + 1) \ 3627 : (REGNO) == CR_PC ? (66 + 2) \ 3628 : (REGNO) == CR_BPC ? (66 + 3) \ 3629 : (REGNO) == CR_DPSW ? (66 + 4) \ 3630 : (REGNO) == CR_DPC ? (66 + 5) \ 3631 : (REGNO) == CR_RPT_C ? (66 + 7) \ 3632 : (REGNO) == CR_RPT_S ? (66 + 8) \ 3633 : (REGNO) == CR_RPT_E ? (66 + 9) \ 3634 : (REGNO) == CR_MOD_S ? (66 + 10) \ 3635 : (REGNO) == CR_MOD_E ? (66 + 11) \ 3636 : (REGNO) == CR_IBA ? (66 + 14) \ 3637 : (REGNO) == CR_EIT_VB ? (66 + 15) \ 3638 : (REGNO) == CR_INT_S ? (66 + 16) \ 3639 : (REGNO) == CR_INT_M ? (66 + 17) \ 3640 : -1) 3641 3642 /* A C expression that returns the integer offset value for an automatic 3643 variable having address X (an RTL expression). The default computation 3644 assumes that X is based on the frame-pointer and gives the offset from the 3645 frame-pointer. This is required for targets that produce debugging output 3646 for DBX or COFF-style debugging output for SDB and allow the frame-pointer 3647 to be eliminated when the `-g' options is used. */ 3648 /* #define DEBUGGER_AUTO_OFFSET(X) */ 3649 3650 /* A C expression that returns the integer offset value for an argument having 3651 address X (an RTL expression). The nominal offset is OFFSET. */ 3652 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */ 3653 3654 /* A C expression that returns the type of debugging output GNU CC produces 3655 when the user specifies `-g' or `-ggdb'. Define this if you have arranged 3656 for GNU CC to support more than one format of debugging output. Currently, 3657 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG', 3658 `DWARF2_DEBUG', and `XCOFF_DEBUG'. 3659 3660 The value of this macro only affects the default debugging output; the user 3661 can always get a specific type of output by using `-gstabs', `-gcoff', 3662 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'. 3663 3664 Defined in svr4.h. */ 3665 3666 #undef PREFERRED_DEBUGGING_TYPE 3667 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 3668 3669 3670 /* Specific Options for DBX Output. */ 3671 3672 /* Define this macro if GNU CC should produce debugging output for DBX in 3673 response to the `-g' option. 3674 3675 Defined in svr4.h. */ 3676 /* #define DBX_DEBUGGING_INFO */ 3677 3678 /* Define this macro if GNU CC should produce XCOFF format debugging output in 3679 response to the `-g' option. This is a variant of DBX format. */ 3680 /* #define XCOFF_DEBUGGING_INFO */ 3681 3682 /* Define this macro to control whether GNU CC should by default generate GDB's 3683 extended version of DBX debugging information (assuming DBX-format debugging 3684 information is enabled at all). If you don't define the macro, the default 3685 is 1: always generate the extended information if there is any occasion to. */ 3686 /* #define DEFAULT_GDB_EXTENSIONS */ 3687 3688 /* Define this macro if all `.stabs' commands should be output while in the 3689 text section. */ 3690 /* #define DEBUG_SYMS_TEXT */ 3691 3692 /* A C string constant naming the assembler pseudo op to use instead of 3693 `.stabs' to define an ordinary debugging symbol. If you don't define this 3694 macro, `.stabs' is used. This macro applies only to DBX debugging 3695 information format. */ 3696 /* #define ASM_STABS_OP */ 3697 3698 /* A C string constant naming the assembler pseudo op to use instead of 3699 `.stabd' to define a debugging symbol whose value is the current location. 3700 If you don't define this macro, `.stabd' is used. This macro applies only 3701 to DBX debugging information format. */ 3702 /* #define ASM_STABD_OP */ 3703 3704 /* A C string constant naming the assembler pseudo op to use instead of 3705 `.stabn' to define a debugging symbol with no name. If you don't define 3706 this macro, `.stabn' is used. This macro applies only to DBX debugging 3707 information format. */ 3708 /* #define ASM_STABN_OP */ 3709 3710 /* Define this macro if DBX on your system does not support the construct 3711 `xsTAGNAME'. On some systems, this construct is used to describe a forward 3712 reference to a structure named TAGNAME. On other systems, this construct is 3713 not supported at all. */ 3714 /* #define DBX_NO_XREFS */ 3715 3716 /* A symbol name in DBX-format debugging information is normally continued 3717 (split into two separate `.stabs' directives) when it exceeds a certain 3718 length (by default, 80 characters). On some operating systems, DBX requires 3719 this splitting; on others, splitting must not be done. You can inhibit 3720 splitting by defining this macro with the value zero. You can override the 3721 default splitting-length by defining this macro as an expression for the 3722 length you desire. */ 3723 /* #define DBX_CONTIN_LENGTH */ 3724 3725 /* Normally continuation is indicated by adding a `\' character to the end of a 3726 `.stabs' string when a continuation follows. To use a different character 3727 instead, define this macro as a character constant for the character you 3728 want to use. Do not define this macro if backslash is correct for your 3729 system. */ 3730 /* #define DBX_CONTIN_CHAR */ 3731 3732 /* Define this macro if it is necessary to go to the data section before 3733 outputting the `.stabs' pseudo-op for a non-global static variable. */ 3734 /* #define DBX_STATIC_STAB_DATA_SECTION */ 3735 3736 /* The value to use in the "code" field of the `.stabs' directive for a 3737 typedef. The default is `N_LSYM'. */ 3738 /* #define DBX_TYPE_DECL_STABS_CODE */ 3739 3740 /* The value to use in the "code" field of the `.stabs' directive for a static 3741 variable located in the text section. DBX format does not provide any 3742 "right" way to do this. The default is `N_FUN'. */ 3743 /* #define DBX_STATIC_CONST_VAR_CODE */ 3744 3745 /* The value to use in the "code" field of the `.stabs' directive for a 3746 parameter passed in registers. DBX format does not provide any "right" way 3747 to do this. The default is `N_RSYM'. */ 3748 /* #define DBX_REGPARM_STABS_CODE */ 3749 3750 /* The letter to use in DBX symbol data to identify a symbol as a parameter 3751 passed in registers. DBX format does not customarily provide any way to do 3752 this. The default is `'P''. */ 3753 /* #define DBX_REGPARM_STABS_LETTER */ 3754 3755 /* The letter to use in DBX symbol data to identify a symbol as a stack 3756 parameter. The default is `'p''. */ 3757 /* #define DBX_MEMPARM_STABS_LETTER */ 3758 3759 /* Define this macro if the DBX information for a function and its arguments 3760 should precede the assembler code for the function. Normally, in DBX 3761 format, the debugging information entirely follows the assembler code. 3762 3763 Defined in svr4.h. */ 3764 /* #define DBX_FUNCTION_FIRST */ 3765 3766 /* Define this macro if the `N_LBRAC' symbol for a block should precede the 3767 debugging information for variables and functions defined in that block. 3768 Normally, in DBX format, the `N_LBRAC' symbol comes first. */ 3769 /* #define DBX_LBRAC_FIRST */ 3770 3771 /* Define this macro if the value of a symbol describing the scope of a block 3772 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing 3773 function. Normally, GNU C uses an absolute address. 3774 3775 Defined in svr4.h. */ 3776 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */ 3777 3778 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL' 3779 stabs for included header files, as on Sun systems. This macro 3780 also directs GNU C to output a type number as a pair of a file 3781 number and a type number within the file. Normally, GNU C does not 3782 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single 3783 number for a type number. */ 3784 /* #define DBX_USE_BINCL */ 3785 3786 3787 /* Open ended Hooks for DBX Output. */ 3788 3789 /* Define this macro to say how to output to STREAM the debugging information 3790 for the start of a scope level for variable names. The argument NAME is the 3791 name of an assembler symbol (for use with `assemble_name') whose value is 3792 the address where the scope begins. */ 3793 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */ 3794 3795 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */ 3796 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */ 3797 3798 /* Define this macro if the target machine requires special handling to output 3799 an enumeration type. The definition should be a C statement (sans 3800 semicolon) to output the appropriate information to STREAM for the type 3801 TYPE. */ 3802 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */ 3803 3804 /* Define this macro if the target machine requires special output at the end 3805 of the debugging information for a function. The definition should be a C 3806 statement (sans semicolon) to output the appropriate information to STREAM. 3807 FUNCTION is the `FUNCTION_DECL' node for the function. */ 3808 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */ 3809 3810 /* Define this macro if you need to control the order of output of the standard 3811 data types at the beginning of compilation. The argument SYMS is a `tree' 3812 which is a chain of all the predefined global symbols, including names of 3813 data types. 3814 3815 Normally, DBX output starts with definitions of the types for integers and 3816 characters, followed by all the other predefined types of the particular 3817 language in no particular order. 3818 3819 On some machines, it is necessary to output different particular types 3820 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those 3821 symbols in the necessary order. Any predefined types that you don't 3822 explicitly output will be output afterward in no particular order. 3823 3824 Be careful not to define this macro so that it works only for C. There are 3825 no global variables to access most of the built-in types, because another 3826 language may have another set of types. The way to output a particular type 3827 is to look through SYMS to see if you can find it. Here is an example: 3828 3829 { 3830 tree decl; 3831 for (decl = syms; decl; decl = TREE_CHAIN (decl)) 3832 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)), 3833 "long int")) 3834 dbxout_symbol (decl); 3835 ... 3836 } 3837 3838 This does nothing if the expected type does not exist. 3839 3840 See the function `init_decl_processing' in `c-decl.c' to find the names to 3841 use for all the built-in C types. */ 3842 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */ 3843 3844 /* Some stabs encapsulation formats (in particular ECOFF), cannot 3845 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx 3846 extension construct. On those machines, define this macro to turn 3847 this feature off without disturbing the rest of the gdb extensions. */ 3848 /* #define NO_DBX_FUNCTION_END */ 3849 3850 3851 /* File names in DBX format. */ 3852 3853 /* Define this if DBX wants to have the current directory recorded in each 3854 object file. 3855 3856 Note that the working directory is always recorded if GDB extensions are 3857 enabled. */ 3858 /* #define DBX_WORKING_DIRECTORY */ 3859 3860 /* A C statement to output DBX debugging information to the stdio stream STREAM 3861 which indicates that file NAME is the main source file--the file specified 3862 as the input file for compilation. This macro is called only once, at the 3863 beginning of compilation. 3864 3865 This macro need not be defined if the standard form of output for DBX 3866 debugging information is appropriate. 3867 3868 Defined in svr4.h. */ 3869 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */ 3870 3871 /* A C statement to output DBX debugging information to the stdio stream STREAM 3872 which indicates that the current directory during compilation is named NAME. 3873 3874 This macro need not be defined if the standard form of output for DBX 3875 debugging information is appropriate. */ 3876 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */ 3877 3878 /* A C statement to output DBX debugging information at the end of compilation 3879 of the main source file NAME. 3880 3881 If you don't define this macro, nothing special is output at the end of 3882 compilation, which is correct for most machines. */ 3883 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */ 3884 3885 /* A C statement to output DBX debugging information to the stdio stream STREAM 3886 which indicates that file NAME is the current source file. This output is 3887 generated each time input shifts to a different source file as a result of 3888 `#include', the end of an included file, or a `#line' command. 3889 3890 This macro need not be defined if the standard form of output for DBX 3891 debugging information is appropriate. */ 3892 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */ 3893 3894 3895 /* Macros for SDB and Dwarf Output. */ 3896 3897 /* Define this macro if GNU CC should produce COFF-style debugging output for 3898 SDB in response to the `-g' option. */ 3899 /* #define SDB_DEBUGGING_INFO */ 3900 3901 /* Define this macro if GNU CC should produce dwarf format debugging output in 3902 response to the `-g' option. 3903 3904 Defined in svr4.h. */ 3905 /* #define DWARF_DEBUGGING_INFO */ 3906 3907 /* Define this macro if GNU CC should produce dwarf version 2 format debugging 3908 output in response to the `-g' option. 3909 3910 To support optional call frame debugging information, you must also define 3911 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the 3912 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa' 3913 and `dwarf2out_reg_save' as appropriate from output_function_prologue() if 3914 you don't. 3915 3916 Defined in svr4.h. */ 3917 /* #define DWARF2_DEBUGGING_INFO */ 3918 3919 /* Define these macros to override the assembler syntax for the special SDB 3920 assembler directives. See `sdbout.c' for a list of these macros and their 3921 arguments. If the standard syntax is used, you need not define them 3922 yourself. */ 3923 /* #define PUT_SDB_... */ 3924 3925 /* Some assemblers do not support a semicolon as a delimiter, even between SDB 3926 assembler directives. In that case, define this macro to be the delimiter 3927 to use (usually `\n'). It is not necessary to define a new set of 3928 `PUT_SDB_OP' macros if this is the only change required. */ 3929 /* #define SDB_DELIM */ 3930 3931 /* Define this macro to override the usual method of constructing a dummy name 3932 for anonymous structure and union types. See `sdbout.c' for more 3933 information. */ 3934 /* #define SDB_GENERATE_FAKE */ 3935 3936 /* Define this macro to allow references to unknown structure, union, or 3937 enumeration tags to be emitted. Standard COFF does not allow handling of 3938 unknown references, MIPS ECOFF has support for it. */ 3939 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */ 3940 3941 /* Define this macro to allow references to structure, union, or enumeration 3942 tags that have not yet been seen to be handled. Some assemblers choke if 3943 forward tags are used, while some require it. */ 3944 /* #define SDB_ALLOW_FORWARD_REFERENCES */ 3945 3946 3947 3948 /* Miscellaneous Parameters. */ 3949 3950 /* Define this if you have defined special-purpose predicates in the file 3951 `MACHINE.c'. This macro is called within an initializer of an array of 3952 structures. The first field in the structure is the name of a predicate and 3953 the second field is an array of rtl codes. For each predicate, list all rtl 3954 codes that can be in expressions matched by the predicate. The list should 3955 have a trailing comma. Here is an example of two entries in the list for a 3956 typical RISC machine: 3957 3958 #define PREDICATE_CODES \ 3959 {"gen_reg_rtx_operand", {SUBREG, REG}}, \ 3960 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}}, 3961 3962 Defining this macro does not affect the generated code (however, incorrect 3963 definitions that omit an rtl code that may be matched by the predicate can 3964 cause the compiler to malfunction). Instead, it allows the table built by 3965 `genrecog' to be more compact and efficient, thus speeding up the compiler. 3966 The most important predicates to include in the list specified by this macro 3967 are thoses used in the most insn patterns. */ 3968 3969 #define PREDICATE_CODES \ 3970 { "short_memory_operand", { MEM }}, \ 3971 { "long_memory_operand", { MEM }}, \ 3972 { "d30v_memory_operand", { MEM }}, \ 3973 { "single_reg_memory_operand", { MEM }}, \ 3974 { "const_addr_memory_operand", { MEM }}, \ 3975 { "call_operand", { MEM }}, \ 3976 { "gpr_operand", { REG, SUBREG }}, \ 3977 { "accum_operand", { REG, SUBREG }}, \ 3978 { "gpr_or_accum_operand", { REG, SUBREG }}, \ 3979 { "cr_operand", { REG, SUBREG }}, \ 3980 { "repeat_operand", { REG, SUBREG }}, \ 3981 { "flag_operand", { REG, SUBREG }}, \ 3982 { "br_flag_operand", { REG, SUBREG }}, \ 3983 { "br_flag_or_constant_operand", { REG, SUBREG, CONST_INT }}, \ 3984 { "gpr_or_br_flag_operand", { REG, SUBREG }}, \ 3985 { "f0_operand", { REG, SUBREG }}, \ 3986 { "f1_operand", { REG, SUBREG }}, \ 3987 { "carry_operand", { REG, SUBREG }}, \ 3988 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, \ 3989 CONST_DOUBLE }}, \ 3990 { "gpr_or_signed6_operand", { REG, SUBREG, CONST_INT }}, \ 3991 { "gpr_or_unsigned5_operand", { REG, SUBREG, CONST_INT }}, \ 3992 { "gpr_or_unsigned6_operand", { REG, SUBREG, CONST_INT }}, \ 3993 { "gpr_or_constant_operand", { REG, SUBREG, CONST_INT, \ 3994 CONST, SYMBOL_REF, \ 3995 LABEL_REF }}, \ 3996 { "gpr_or_dbl_const_operand", { REG, SUBREG, CONST_INT, \ 3997 CONST, SYMBOL_REF, \ 3998 LABEL_REF, CONST_DOUBLE }}, \ 3999 { "gpr_or_memory_operand", { REG, SUBREG, MEM }}, \ 4000 { "move_input_operand", { REG, SUBREG, MEM, CONST_INT, \ 4001 CONST, SYMBOL_REF, \ 4002 LABEL_REF, CONST_DOUBLE }}, \ 4003 { "move_output_operand", { REG, SUBREG, MEM }}, \ 4004 { "signed6_operand", { CONST_INT }}, \ 4005 { "unsigned5_operand", { CONST_INT }}, \ 4006 { "unsigned6_operand", { CONST_INT }}, \ 4007 { "bitset_operand", { CONST_INT }}, \ 4008 { "condexec_test_operator", { EQ, NE }}, \ 4009 { "condexec_branch_operator", { EQ, NE }}, \ 4010 { "condexec_unary_operator", { ABS, NEG, NOT, ZERO_EXTEND }}, \ 4011 { "condexec_addsub_operator", { PLUS, MINUS }}, \ 4012 { "condexec_binary_operator", { MULT, AND, IOR, XOR, \ 4013 ASHIFT, ASHIFTRT, LSHIFTRT, \ 4014 ROTATE, ROTATERT }}, \ 4015 { "condexec_shiftl_operator", { ASHIFT, ROTATE }}, \ 4016 { "condexec_extend_operator", { SIGN_EXTEND, ZERO_EXTEND }}, \ 4017 { "branch_zero_operator", { EQ, NE }}, \ 4018 { "cond_move_dest_operand", { REG, SUBREG, MEM }}, \ 4019 { "cond_move_operand", { REG, SUBREG, CONST_INT, \ 4020 CONST, SYMBOL_REF, \ 4021 LABEL_REF, MEM }}, \ 4022 { "cond_exec_operand", { REG, SUBREG, CONST_INT, \ 4023 CONST, SYMBOL_REF, \ 4024 LABEL_REF, MEM }}, \ 4025 { "srelational_si_operator", { EQ, NE, LT, LE, GT, GE }}, \ 4026 { "urelational_si_operator", { LTU, LEU, GTU, GEU }}, \ 4027 { "relational_di_operator", { EQ, NE, LT, LE, GT, GE, \ 4028 LTU, LEU, GTU, GEU }}, 4029 4030 /* An alias for a machine mode name. This is the machine mode that elements of 4031 a jump-table should have. */ 4032 #define CASE_VECTOR_MODE SImode 4033 4034 /* Define as C expression which evaluates to nonzero if the tablejump 4035 instruction expects the table to contain offsets from the address of the 4036 table. 4037 Do not define this if the table should contain absolute addresses. */ 4038 /* #define CASE_VECTOR_PC_RELATIVE 1 */ 4039 4040 /* Define this if control falls through a `case' insn when the index value is 4041 out of range. This means the specified default-label is actually ignored by 4042 the `case' insn proper. */ 4043 /* #define CASE_DROPS_THROUGH */ 4044 4045 /* Define this to be the smallest number of different values for which it is 4046 best to use a jump-table instead of a tree of conditional branches. The 4047 default is four for machines with a `casesi' instruction and five otherwise. 4048 This is best for most machines. */ 4049 /* #define CASE_VALUES_THRESHOLD */ 4050 4051 /* Define this macro if operations between registers with integral mode smaller 4052 than a word are always performed on the entire register. Most RISC machines 4053 have this property and most CISC machines do not. */ 4054 #define WORD_REGISTER_OPERATIONS 1 4055 4056 /* Define this macro to be a C expression indicating when insns that read 4057 memory in MODE, an integral mode narrower than a word, set the bits outside 4058 of MODE to be either the sign-extension or the zero-extension of the data 4059 read. Return `SIGN_EXTEND' for values of MODE for which the insn 4060 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other 4061 modes. 4062 4063 This macro is not called with MODE non-integral or with a width greater than 4064 or equal to `BITS_PER_WORD', so you may return any value in this case. Do 4065 not define this macro if it would always return `NIL'. On machines where 4066 this macro is defined, you will normally define it as the constant 4067 `SIGN_EXTEND' or `ZERO_EXTEND'. */ 4068 4069 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND 4070 4071 /* Define if loading short immediate values into registers sign extends. */ 4072 #define SHORT_IMMEDIATES_SIGN_EXTEND 4073 4074 /* Define this macro if the same instructions that convert a floating point 4075 number to a signed fixed point number also convert validly to an unsigned 4076 one. */ 4077 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */ 4078 4079 /* The maximum number of bytes that a single instruction can move quickly from 4080 memory to memory. */ 4081 #define MOVE_MAX 8 4082 4083 /* The maximum number of bytes that a single instruction can move quickly from 4084 memory to memory. If this is undefined, the default is `MOVE_MAX'. 4085 Otherwise, it is the constant value that is the largest value that 4086 `MOVE_MAX' can have at run-time. */ 4087 /* #define MAX_MOVE_MAX */ 4088 4089 /* A C expression that is nonzero if on this machine the number of bits 4090 actually used for the count of a shift operation is equal to the number of 4091 bits needed to represent the size of the object being shifted. When this 4092 macro is nonzero, the compiler will assume that it is safe to omit a 4093 sign-extend, zero-extend, and certain bitwise `and' instructions that 4094 truncates the count of a shift operation. On machines that have 4095 instructions that act on bitfields at variable positions, which may include 4096 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables 4097 deletion of truncations of the values that serve as arguments to bitfield 4098 instructions. 4099 4100 If both types of instructions truncate the count (for shifts) and position 4101 (for bit-field operations), or if no variable-position bit-field instructions 4102 exist, you should define this macro. 4103 4104 However, on some machines, such as the 80386 and the 680x0, truncation only 4105 applies to shift operations and not the (real or pretended) bitfield 4106 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines. 4107 Instead, add patterns to the `md' file that include the implied truncation 4108 of the shift instructions. 4109 4110 You need not define this macro if it would always have the value of zero. */ 4111 /* #define SHIFT_COUNT_TRUNCATED */ 4112 4113 /* A C expression which is nonzero if on this machine it is safe to "convert" 4114 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller 4115 than INPREC) by merely operating on it as if it had only OUTPREC bits. 4116 4117 On many machines, this expression can be 1. 4118 4119 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for 4120 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the 4121 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve 4122 things. */ 4123 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 4124 4125 /* A C expression describing the value returned by a comparison operator with 4126 an integral mode and stored by a store-flag instruction (`sCOND') when the 4127 condition is true. This description must apply to *all* the `sCOND' 4128 patterns and all the comparison operators whose results have a `MODE_INT' 4129 mode. 4130 4131 A value of 1 or -1 means that the instruction implementing the comparison 4132 operator returns exactly 1 or -1 when the comparison is true and 0 when the 4133 comparison is false. Otherwise, the value indicates which bits of the 4134 result are guaranteed to be 1 when the comparison is true. This value is 4135 interpreted in the mode of the comparison operation, which is given by the 4136 mode of the first operand in the `sCOND' pattern. Either the low bit or the 4137 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used 4138 by the compiler. 4139 4140 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code 4141 that depends only on the specified bits. It can also replace comparison 4142 operators with equivalent operations if they cause the required bits to be 4143 set, even if the remaining bits are undefined. For example, on a machine 4144 whose comparison operators return an `SImode' value and where 4145 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit 4146 is relevant, the expression 4147 4148 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0)) 4149 4150 can be converted to 4151 4152 (ashift:SI X (const_int N)) 4153 4154 where N is the appropriate shift count to move the bit being tested into the 4155 sign bit. 4156 4157 There is no way to describe a machine that always sets the low-order bit for 4158 a true value, but does not guarantee the value of any other bits, but we do 4159 not know of any machine that has such an instruction. If you are trying to 4160 port GNU CC to such a machine, include an instruction to perform a 4161 logical-and of the result with 1 in the pattern for the comparison operators 4162 and let us know (*note How to Report Bugs: Bug Reporting.). 4163 4164 Often, a machine will have multiple instructions that obtain a value from a 4165 comparison (or the condition codes). Here are rules to guide the choice of 4166 value for `STORE_FLAG_VALUE', and hence the instructions to be used: 4167 4168 * Use the shortest sequence that yields a valid definition for 4169 `STORE_FLAG_VALUE'. It is more efficient for the compiler to 4170 "normalize" the value (convert it to, e.g., 1 or 0) than for 4171 the comparison operators to do so because there may be 4172 opportunities to combine the normalization with other 4173 operations. 4174 4175 * For equal-length sequences, use a value of 1 or -1, with -1 4176 being slightly preferred on machines with expensive jumps and 4177 1 preferred on other machines. 4178 4179 * As a second choice, choose a value of `0x80000001' if 4180 instructions exist that set both the sign and low-order bits 4181 but do not define the others. 4182 4183 * Otherwise, use a value of `0x80000000'. 4184 4185 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and 4186 its negation in the same number of instructions. On those machines, you 4187 should also define a pattern for those cases, e.g., one matching 4188 4189 (set A (neg:M (ne:M B C))) 4190 4191 Some machines can also perform `and' or `plus' operations on condition code 4192 values with less instructions than the corresponding `sCOND' insn followed 4193 by `and' or `plus'. On those machines, define the appropriate patterns. 4194 Use the names `incscc' and `decscc', respectively, for the patterns 4195 which perform `plus' or `minus' operations on condition code values. See 4196 `rs6000.md' for some examples. The GNU Superoptizer can be used to find 4197 such instruction sequences on other machines. 4198 4199 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag 4200 instructions. */ 4201 /* #define STORE_FLAG_VALUE */ 4202 4203 /* A C expression that gives a nonzero floating point value that is returned 4204 when comparison operators with floating-point results are true. Define this 4205 macro on machine that have comparison operations that return floating-point 4206 values. If there are no such operations, do not define this macro. */ 4207 /* #define FLOAT_STORE_FLAG_VALUE */ 4208 4209 /* An alias for the machine mode for pointers. On most machines, define this 4210 to be the integer mode corresponding to the width of a hardware pointer; 4211 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines 4212 you must define this to be one of the partial integer modes, such as 4213 `PSImode'. 4214 4215 The width of `Pmode' must be at least as large as the value of 4216 `POINTER_SIZE'. If it is not equal, you must define the macro 4217 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */ 4218 #define Pmode SImode 4219 4220 /* An alias for the machine mode used for memory references to functions being 4221 called, in `call' RTL expressions. On most machines this should be 4222 `QImode'. */ 4223 #define FUNCTION_MODE QImode 4224 4225 /* A C expression for the maximum number of instructions above which the 4226 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node. 4227 4228 The default definition of this macro is 64 plus 8 times the number of 4229 arguments that the function accepts. Some people think a larger threshold 4230 should be used on RISC machines. */ 4231 /* #define INTEGRATE_THRESHOLD(DECL) */ 4232 4233 /* Define this macro if the system header files support C++ as well as C. This 4234 macro inhibits the usual method of using system header files in C++, which 4235 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */ 4236 /* #define NO_IMPLICIT_EXTERN_C */ 4237 4238 /* Define this macro to handle System V style pragmas (particularly #pack). 4239 4240 Defined in svr4.h. */ 4241 #define HANDLE_SYSV_PRAGMA 1 4242 4243 /* Define this macro if you want to handle #pragma weak (HANDLE_SYSV_PRAGMA 4244 must also be defined). */ 4245 /* #define HANDLE_WEAK_PRAGMA */ 4246 4247 /* Define this macro if the assembler does not accept the character `$' in 4248 label names. By default constructors and destructors in G++ have `$' in the 4249 identifiers. If this macro is defined, `.' is used instead. 4250 4251 Defined in svr4.h. */ 4252 /* #define NO_DOLLAR_IN_LABEL */ 4253 4254 /* Define this macro if the assembler does not accept the character `.' in 4255 label names. By default constructors and destructors in G++ have names that 4256 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */ 4257 /* #define NO_DOT_IN_LABEL */ 4258 4259 /* Define this macro if the target system expects every program's `main' 4260 function to return a standard "success" value by default (if no other value 4261 is explicitly returned). 4262 4263 The definition should be a C statement (sans semicolon) to generate the 4264 appropriate rtl instructions. It is used only when compiling the end of 4265 `main'. */ 4266 /* #define DEFAULT_MAIN_RETURN */ 4267 4268 /* Define this if your `exit' function needs to do something besides calling an 4269 external function `_cleanup' before terminating with `_exit'. The 4270 `EXIT_BODY' macro is only needed if `NEED_ATEXIT' is defined and 4271 `ON_EXIT' is not defined. */ 4272 /* #define EXIT_BODY */ 4273 4274 /* Define this macro as a C expression that is nonzero if it is safe for the 4275 delay slot scheduler to place instructions in the delay slot of INSN, even 4276 if they appear to use a resource set or clobbered in INSN. INSN is always a 4277 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this 4278 behavior. On machines where some `insn' or `jump_insn' is really a function 4279 call and hence has this behavior, you should define this macro. 4280 4281 You need not define this macro if it would always return zero. */ 4282 /* #define INSN_SETS_ARE_DELAYED(INSN) */ 4283 4284 /* Define this macro as a C expression that is nonzero if it is safe for the 4285 delay slot scheduler to place instructions in the delay slot of INSN, even 4286 if they appear to set or clobber a resource referenced in INSN. INSN is 4287 always a `jump_insn' or an `insn'. On machines where some `insn' or 4288 `jump_insn' is really a function call and its operands are registers whose 4289 use is actually in the subroutine it calls, you should define this macro. 4290 Doing so allows the delay slot scheduler to move instructions which copy 4291 arguments into the argument registers into the delay slot of INSN. 4292 4293 You need not define this macro if it would always return zero. */ 4294 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */ 4295 4296 /* In rare cases, correct code generation requires extra machine dependent 4297 processing between the second jump optimization pass and delayed branch 4298 scheduling. On those machines, define this macro as a C statement to act on 4299 the code starting at INSN. */ 4300 #define MACHINE_DEPENDENT_REORG(INSN) d30v_machine_dependent_reorg (INSN) 4301 4302 /* Define this macro if in some cases global symbols from one translation unit 4303 may not be bound to undefined symbols in another translation unit without 4304 user intervention. For instance, under Microsoft Windows symbols must be 4305 explicitly imported from shared libraries (DLLs). */ 4306 /* #define MULTIPLE_SYMBOL_SPACES */ 4307 4308 /* A C expression for the maximum number of instructions to execute via 4309 conditional execution instructions instead of a branch. A value of 4310 BRANCH_COST+1 is the default if the machine does not use cc0, and 1 if it 4311 does use cc0. */ 4312 #define MAX_CONDITIONAL_EXECUTE d30v_cond_exec 4313 4314 #define D30V_DEFAULT_MAX_CONDITIONAL_EXECUTE 4 4315 4316 /* Values of the -mcond-exec=n string. */ 4317 extern int d30v_cond_exec; 4318 extern const char *d30v_cond_exec_string; 4319 4320 #endif /* GCC_D30V_H */ 4321