1 /* Definitions of target machine for GNU compiler, 2 for Motorola M*CORE Processor. 3 Copyright (C) 1993-2020 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef GCC_MCORE_H 22 #define GCC_MCORE_H 23 24 /* RBE: need to move these elsewhere. */ 25 #undef LIKE_PPC_ABI 26 #define MCORE_STRUCT_ARGS 27 /* RBE: end of "move elsewhere". */ 28 29 /* Run-time Target Specification. */ 30 #define TARGET_MCORE 31 32 /* Get tree.c to declare a target-specific specialization of 33 merge_decl_attributes. */ 34 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 35 36 #define TARGET_CPU_CPP_BUILTINS() \ 37 do \ 38 { \ 39 builtin_define ("__mcore__"); \ 40 builtin_define ("__MCORE__"); \ 41 if (TARGET_LITTLE_END) \ 42 builtin_define ("__MCORELE__"); \ 43 else \ 44 builtin_define ("__MCOREBE__"); \ 45 if (TARGET_M340) \ 46 builtin_define ("__M340__"); \ 47 else \ 48 builtin_define ("__M210__"); \ 49 } \ 50 while (0) 51 52 #undef CPP_SPEC 53 #define CPP_SPEC "%{m210:%{mlittle-endian:%ethe m210 does not have little endian support}}" 54 55 /* We don't have a -lg library, so don't put it in the list. */ 56 #undef LIB_SPEC 57 #define LIB_SPEC "%{!shared: %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" 58 59 #undef ASM_SPEC 60 #define ASM_SPEC "%{mbig-endian:-EB} %{m210:-cpu=210 -EB}" 61 62 #undef LINK_SPEC 63 #define LINK_SPEC "%{mbig-endian:-EB} %{m210:-EB} -X" 64 65 #define TARGET_DEFAULT \ 66 (MASK_HARDLIT \ 67 | MASK_DIV \ 68 | MASK_RELAX_IMM \ 69 | MASK_M340 \ 70 | MASK_LITTLE_END) 71 72 #ifndef MULTILIB_DEFAULTS 73 #define MULTILIB_DEFAULTS { "mlittle-endian", "m340" } 74 #endif 75 76 /* The ability to have 4 byte alignment is being suppressed for now. 77 If this ability is reenabled, you must disable the definition below 78 *and* edit t-mcore to enable multilibs for 4 byte alignment code. */ 79 #undef TARGET_8ALIGN 80 #define TARGET_8ALIGN 1 81 82 extern char * mcore_current_function_name; 83 84 /* The MCore ABI says that bitfields are unsigned by default. */ 85 #define CC1_SPEC "-funsigned-bitfields" 86 87 /* Target machine storage Layout. */ 88 89 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 90 if (GET_MODE_CLASS (MODE) == MODE_INT \ 91 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ 92 { \ 93 (MODE) = SImode; \ 94 (UNSIGNEDP) = 1; \ 95 } 96 97 /* Define this if most significant bit is lowest numbered 98 in instructions that operate on numbered bit-fields. */ 99 #define BITS_BIG_ENDIAN 0 100 101 /* Define this if most significant byte of a word is the lowest numbered. */ 102 #define BYTES_BIG_ENDIAN (! TARGET_LITTLE_END) 103 104 /* Define this if most significant word of a multiword number is the lowest 105 numbered. */ 106 #define WORDS_BIG_ENDIAN (! TARGET_LITTLE_END) 107 108 #define MAX_BITS_PER_WORD 32 109 110 /* Width of a word, in units (bytes). */ 111 #define UNITS_PER_WORD 4 112 113 /* A C expression for the size in bits of the type `long long' on the 114 target machine. If you don't define this, the default is two 115 words. */ 116 #define LONG_LONG_TYPE_SIZE 64 117 118 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ 119 #define PARM_BOUNDARY 32 120 121 /* Boundary (in *bits*) on which stack pointer should be aligned. */ 122 #define STACK_BOUNDARY (TARGET_8ALIGN ? 64 : 32) 123 124 /* Largest increment in UNITS we allow the stack to grow in a single operation. */ 125 #define STACK_UNITS_MAXSTEP 4096 126 127 /* Allocation boundary (in *bits*) for the code of a function. */ 128 #define FUNCTION_BOUNDARY ((TARGET_OVERALIGN_FUNC) ? 32 : 16) 129 130 /* Alignment of field after `int : 0' in a structure. */ 131 #define EMPTY_FIELD_BOUNDARY 32 132 133 /* No data type wants to be aligned rounder than this. */ 134 #define BIGGEST_ALIGNMENT (TARGET_8ALIGN ? 64 : 32) 135 136 /* The best alignment to use in cases where we have a choice. */ 137 #define FASTEST_ALIGNMENT 32 138 139 /* Every structures size must be a multiple of 8 bits. */ 140 #define STRUCTURE_SIZE_BOUNDARY 8 141 142 /* Look at the fundamental type that is used for a bit-field and use 143 that to impose alignment on the enclosing structure. 144 struct s {int a:8}; should have same alignment as "int", not "char". */ 145 #define PCC_BITFIELD_TYPE_MATTERS 1 146 147 /* Largest integer machine mode for structures. If undefined, the default 148 is GET_MODE_SIZE(DImode). */ 149 #define MAX_FIXED_MODE_SIZE 32 150 151 /* Make arrays of chars word-aligned for the same reasons. */ 152 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 153 (TREE_CODE (TYPE) == ARRAY_TYPE \ 154 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ 155 && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN)) 156 157 /* Set this nonzero if move instructions will actually fail to work 158 when given unaligned data. */ 159 #define STRICT_ALIGNMENT 1 160 161 /* Standard register usage. */ 162 163 /* Register allocation for our first guess 164 165 r0 stack pointer 166 r1 scratch, target reg for xtrb? 167 r2-r7 arguments. 168 r8-r14 call saved 169 r15 link register 170 ap arg pointer (doesn't really exist, always eliminated) 171 c c bit 172 fp frame pointer (doesn't really exist, always eliminated) 173 x19 two control registers. */ 174 175 /* Number of actual hardware registers. 176 The hardware registers are assigned numbers for the compiler 177 from 0 to just below FIRST_PSEUDO_REGISTER. 178 All registers that the compiler knows about must be given numbers, 179 even those that are not normally considered general registers. 180 181 MCore has 16 integer registers and 2 control registers + the arg 182 pointer. */ 183 184 #define FIRST_PSEUDO_REGISTER 20 185 186 #define R1_REG 1 /* Where literals are forced. */ 187 #define LK_REG 15 /* Overloaded on general register. */ 188 #define AP_REG 16 /* Fake arg pointer register. */ 189 /* RBE: mcore.md depends on CC_REG being set to 17. */ 190 #define CC_REG 17 /* Can't name it C_REG. */ 191 #define FP_REG 18 /* Fake frame pointer register. */ 192 193 /* Specify the registers used for certain standard purposes. 194 The values of these macros are register numbers. */ 195 196 197 #undef PC_REGNUM /* Define this if the program counter is overloaded on a register. */ 198 #define STACK_POINTER_REGNUM 0 /* Register to use for pushing function arguments. */ 199 #define FRAME_POINTER_REGNUM 8 /* When we need FP, use r8. */ 200 201 /* The assembler's names for the registers. RFP need not always be used as 202 the Real framepointer; it can also be used as a normal general register. 203 Note that the name `fp' is horribly misleading since `fp' is in fact only 204 the argument-and-return-context pointer. */ 205 #define REGISTER_NAMES \ 206 { \ 207 "sp", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ 208 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ 209 "apvirtual", "c", "fpvirtual", "x19" \ 210 } 211 212 /* 1 for registers that have pervasive standard uses 213 and are not available for the register allocator. */ 214 #define FIXED_REGISTERS \ 215 /* r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15 ap c fp x19 */ \ 216 { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} 217 218 /* 1 for registers not available across function calls. 219 These must include the FIXED_REGISTERS and also any 220 registers that can be used without being saved. 221 The latter must include the registers where values are returned 222 and the register where structure-value addresses are passed. 223 Aside from that, you can include as many other registers as you like. */ 224 225 /* RBE: r15 {link register} not available across calls, 226 But we don't mark it that way here.... */ 227 #define CALL_USED_REGISTERS \ 228 /* r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15 ap c fp x19 */ \ 229 { 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} 230 231 /* The order in which register should be allocated. */ 232 #define REG_ALLOC_ORDER \ 233 /* r7 r6 r5 r4 r3 r2 r15 r14 r13 r12 r11 r10 r9 r8 r1 r0 ap c fp x19*/ \ 234 { 7, 6, 5, 4, 3, 2, 15, 14, 13, 12, 11, 10, 9, 8, 1, 0, 16, 17, 18, 19} 235 236 /* Definitions for register eliminations. 237 238 We have two registers that can be eliminated on the MCore. First, the 239 frame pointer register can often be eliminated in favor of the stack 240 pointer register. Secondly, the argument pointer register can always be 241 eliminated; it is replaced with either the stack or frame pointer. */ 242 243 /* Base register for access to arguments of the function. */ 244 #define ARG_POINTER_REGNUM 16 245 246 /* Register in which the static-chain is passed to a function. */ 247 #define STATIC_CHAIN_REGNUM 1 248 249 /* This is an array of structures. Each structure initializes one pair 250 of eliminable registers. The "from" register number is given first, 251 followed by "to". Eliminations of the same "from" register are listed 252 in order of preference. */ 253 #define ELIMINABLE_REGS \ 254 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 255 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 256 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},} 257 258 /* Define the offset between two registers, one to be eliminated, and the other 259 its replacement, at the start of a routine. */ 260 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 261 OFFSET = mcore_initial_elimination_offset (FROM, TO) 262 263 /* Define the classes of registers for register constraints in the 264 machine description. Also define ranges of constants. 265 266 One of the classes must always be named ALL_REGS and include all hard regs. 267 If there is more than one class, another class must be named NO_REGS 268 and contain no registers. 269 270 The name GENERAL_REGS must be the name of a class (or an alias for 271 another name such as ALL_REGS). This is the class of registers 272 that is allowed by "g" or "r" in a register constraint. 273 Also, registers outside this class are allocated only when 274 instructions express preferences for them. 275 276 The classes must be numbered in nondecreasing order; that is, 277 a larger-numbered class must never be contained completely 278 in a smaller-numbered class. 279 280 For any two classes, it is very desirable that there be another 281 class that represents their union. */ 282 283 /* The MCore has only general registers. There are 284 also some special purpose registers: the T bit register, the 285 procedure Link and the Count Registers. */ 286 enum reg_class 287 { 288 NO_REGS, 289 ONLYR1_REGS, 290 LRW_REGS, 291 GENERAL_REGS, 292 C_REGS, 293 ALL_REGS, 294 LIM_REG_CLASSES 295 }; 296 297 #define N_REG_CLASSES (int) LIM_REG_CLASSES 298 299 300 /* Give names of register classes as strings for dump file. */ 301 #define REG_CLASS_NAMES \ 302 { \ 303 "NO_REGS", \ 304 "ONLYR1_REGS", \ 305 "LRW_REGS", \ 306 "GENERAL_REGS", \ 307 "C_REGS", \ 308 "ALL_REGS", \ 309 } 310 311 /* Define which registers fit in which classes. 312 This is an initializer for a vector of HARD_REG_SET 313 of length N_REG_CLASSES. */ 314 315 /* ??? STACK_POINTER_REGNUM should be excluded from LRW_REGS. */ 316 #define REG_CLASS_CONTENTS \ 317 { \ 318 {0x000000}, /* NO_REGS */ \ 319 {0x000002}, /* ONLYR1_REGS */ \ 320 {0x007FFE}, /* LRW_REGS */ \ 321 {0x01FFFF}, /* GENERAL_REGS */ \ 322 {0x020000}, /* C_REGS */ \ 323 {0x0FFFFF} /* ALL_REGS */ \ 324 } 325 326 /* The same information, inverted: 327 Return the class number of the smallest class containing 328 reg number REGNO. This could be a conditional expression 329 or could index an array. */ 330 331 extern const enum reg_class regno_reg_class[FIRST_PSEUDO_REGISTER]; 332 #define REGNO_REG_CLASS(REGNO) ((REGNO) < FIRST_PSEUDO_REGISTER ? regno_reg_class[REGNO] : NO_REGS) 333 334 /* When this hook returns true for MODE, the compiler allows 335 registers explicitly used in the rtl to be used as spill registers 336 but prevents the compiler from extending the lifetime of these 337 registers. */ 338 #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true 339 340 /* The class value for index registers, and the one for base regs. */ 341 #define INDEX_REG_CLASS NO_REGS 342 #define BASE_REG_CLASS GENERAL_REGS 343 344 /* Convenience wrappers around insn_const_int_ok_for_constraint. */ 345 #define CONST_OK_FOR_I(VALUE) \ 346 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_I) 347 #define CONST_OK_FOR_J(VALUE) \ 348 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_J) 349 #define CONST_OK_FOR_L(VALUE) \ 350 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_L) 351 #define CONST_OK_FOR_K(VALUE) \ 352 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_K) 353 #define CONST_OK_FOR_M(VALUE) \ 354 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_M) 355 #define CONST_OK_FOR_N(VALUE) \ 356 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_N) 357 #define CONST_OK_FOR_O(VALUE) \ 358 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_O) 359 #define CONST_OK_FOR_P(VALUE) \ 360 insn_const_int_ok_for_constraint (VALUE, CONSTRAINT_P) 361 362 /* Given an rtx X being reloaded into a reg required to be 363 in class CLASS, return the class of reg to actually use. 364 In general this is just CLASS; but on some machines 365 in some cases it is preferable to use a more restrictive class. */ 366 #define PREFERRED_RELOAD_CLASS(X, CLASS) mcore_reload_class (X, CLASS) 367 368 /* Return the register class of a scratch register needed to copy IN into 369 or out of a register in CLASS in MODE. If it can be done directly, 370 NO_REGS is returned. */ 371 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \ 372 mcore_secondary_reload_class (CLASS, MODE, X) 373 374 /* Return the maximum number of consecutive registers 375 needed to represent mode MODE in a register of class CLASS. 376 377 On MCore this is the size of MODE in words. */ 378 #define CLASS_MAX_NREGS(CLASS, MODE) \ 379 (ROUND_ADVANCE (GET_MODE_SIZE (MODE))) 380 381 /* Stack layout; function entry, exit and calling. */ 382 383 /* Define the number of register that can hold parameters. 384 These two macros are used only in other macro definitions below. */ 385 #define NPARM_REGS 6 386 #define FIRST_PARM_REG 2 387 #define FIRST_RET_REG 2 388 389 /* Define this if pushing a word on the stack 390 makes the stack pointer a smaller address. */ 391 #define STACK_GROWS_DOWNWARD 1 392 393 /* If defined, the maximum amount of space required for outgoing arguments 394 will be computed and placed into the variable 395 `crtl->outgoing_args_size'. No space will be pushed 396 onto the stack for each call; instead, the function prologue should 397 increase the stack frame size by this amount. */ 398 #define ACCUMULATE_OUTGOING_ARGS 1 399 400 /* Offset of first parameter from the argument pointer register value. */ 401 #define FIRST_PARM_OFFSET(FNDECL) 0 402 403 /* Define how to find the value returned by a function. 404 VALTYPE is the data type of the value (as a tree). 405 If the precise function being called is known, FUNC is its FUNCTION_DECL; 406 otherwise, FUNC is 0. */ 407 #define FUNCTION_VALUE(VALTYPE, FUNC) mcore_function_value (VALTYPE, FUNC) 408 409 /* Don't default to pcc-struct-return, because gcc is the only compiler, and 410 we want to retain compatibility with older gcc versions. */ 411 #define DEFAULT_PCC_STRUCT_RETURN 0 412 413 /* Define how to find the value returned by a library function 414 assuming the value has mode MODE. */ 415 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, FIRST_RET_REG) 416 417 /* 1 if N is a possible register number for a function value. 418 On the MCore, only r4 can return results. */ 419 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == FIRST_RET_REG) 420 421 /* 1 if N is a possible register number for function argument passing. */ 422 #define FUNCTION_ARG_REGNO_P(REGNO) \ 423 ((REGNO) >= FIRST_PARM_REG && (REGNO) < (NPARM_REGS + FIRST_PARM_REG)) 424 425 /* Define a data type for recording info about an argument list 426 during the scan of that argument list. This data type should 427 hold all necessary information about the function itself 428 and about the args processed so far, enough to enable macros 429 such as FUNCTION_ARG to determine where the next arg should go. 430 431 On MCore, this is a single integer, which is a number of words 432 of arguments scanned so far (including the invisible argument, 433 if any, which holds the structure-value-address). 434 Thus NARGREGS or more means all following args should go on the stack. */ 435 #define CUMULATIVE_ARGS int 436 437 #define ROUND_ADVANCE(SIZE) \ 438 ((SIZE + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 439 440 /* Round a register number up to a proper boundary for an arg of mode 441 MODE. 442 443 We round to an even reg for things larger than a word. */ 444 #define ROUND_REG(X, MODE) \ 445 ((TARGET_8ALIGN \ 446 && GET_MODE_UNIT_SIZE ((MODE)) > UNITS_PER_WORD) \ 447 ? ((X) + ((X) & 1)) : (X)) 448 449 450 /* Initialize a variable CUM of type CUMULATIVE_ARGS 451 for a call to a function whose data type is FNTYPE. 452 For a library call, FNTYPE is 0. 453 454 On MCore, the offset always starts at 0: the first parm reg is always 455 the same reg. */ 456 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ 457 ((CUM) = 0) 458 459 /* Call the function profiler with a given profile label. */ 460 #define FUNCTION_PROFILER(STREAM,LABELNO) \ 461 { \ 462 fprintf (STREAM, " trap 1\n"); \ 463 fprintf (STREAM, " .align 2\n"); \ 464 fprintf (STREAM, " .long LP%d\n", (LABELNO)); \ 465 } 466 467 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 468 the stack pointer does not matter. The value is tested only in 469 functions that have frame pointers. 470 No definition is equivalent to always zero. */ 471 #define EXIT_IGNORE_STACK 0 472 473 /* Length in units of the trampoline for entering a nested function. */ 474 #define TRAMPOLINE_SIZE 12 475 476 /* Alignment required for a trampoline in bits. */ 477 #define TRAMPOLINE_ALIGNMENT 32 478 479 /* Macros to check register numbers against specific register classes. */ 480 481 /* These assume that REGNO is a hard or pseudo reg number. 482 They give nonzero only if REGNO is a hard reg of the suitable class 483 or a pseudo reg currently allocated to a suitable hard reg. 484 Since they use reg_renumber, they are safe only once reg_renumber 485 has been allocated, which happens in reginfo.c during register 486 allocation. */ 487 #define REGNO_OK_FOR_BASE_P(REGNO) \ 488 ((REGNO) < AP_REG || (unsigned) reg_renumber[(REGNO)] < AP_REG) 489 490 #define REGNO_OK_FOR_INDEX_P(REGNO) 0 491 492 /* Maximum number of registers that can appear in a valid memory 493 address. */ 494 #define MAX_REGS_PER_ADDRESS 1 495 496 /* Recognize any constant value that is a valid address. */ 497 #define CONSTANT_ADDRESS_P(X) (GET_CODE (X) == LABEL_REF) 498 499 /* Specify the machine mode that this machine uses 500 for the index in the tablejump instruction. */ 501 #define CASE_VECTOR_MODE SImode 502 503 /* 'char' is signed by default. */ 504 #define DEFAULT_SIGNED_CHAR 0 505 506 #undef SIZE_TYPE 507 #define SIZE_TYPE "unsigned int" 508 509 #undef PTRDIFF_TYPE 510 #define PTRDIFF_TYPE "int" 511 512 #undef WCHAR_TYPE 513 #define WCHAR_TYPE "long int" 514 515 #undef WCHAR_TYPE_SIZE 516 #define WCHAR_TYPE_SIZE BITS_PER_WORD 517 518 /* Max number of bytes we can move from memory to memory 519 in one reasonably fast instruction. */ 520 #define MOVE_MAX 4 521 522 /* Define if operations between registers always perform the operation 523 on the full register even if a narrower mode is specified. */ 524 #define WORD_REGISTER_OPERATIONS 1 525 526 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD 527 will either zero-extend or sign-extend. The value of this macro should 528 be the code that says which one of the two operations is implicitly 529 done, UNKNOWN if none. */ 530 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND 531 532 /* Nonzero if access to memory by bytes is slow and undesirable. */ 533 #define SLOW_BYTE_ACCESS TARGET_SLOW_BYTES 534 535 /* Shift counts are truncated to 6-bits (0 to 63) instead of the expected 536 5-bits, so we cannot define SHIFT_COUNT_TRUNCATED to true for this 537 target. */ 538 #define SHIFT_COUNT_TRUNCATED 0 539 540 /* Define this if addresses of constant functions 541 shouldn't be put through pseudo regs where they can be cse'd. 542 Desirable on machines where ordinary constants are expensive 543 but a CALL with constant address is cheap. */ 544 /* Why is this defined??? -- dac */ 545 #define NO_FUNCTION_CSE 1 546 547 /* The machine modes of pointers and functions. */ 548 #define Pmode SImode 549 #define FUNCTION_MODE Pmode 550 551 /* Compute extra cost of moving data between one register class 552 and another. All register moves are cheap. */ 553 #define REGISTER_MOVE_COST(MODE, SRCCLASS, DSTCLASS) 2 554 555 /* Assembler output control. */ 556 #define ASM_COMMENT_START "\t//" 557 558 #define ASM_APP_ON "// inline asm begin\n" 559 #define ASM_APP_OFF "// inline asm end\n" 560 561 #define FILE_ASM_OP "\t.file\n" 562 563 /* Switch to the text or data segment. */ 564 #define TEXT_SECTION_ASM_OP "\t.text" 565 #define DATA_SECTION_ASM_OP "\t.data" 566 567 /* Switch into a generic section. */ 568 #undef TARGET_ASM_NAMED_SECTION 569 #define TARGET_ASM_NAMED_SECTION mcore_asm_named_section 570 571 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, LK_REG) 572 573 /* This is how to output an insn to push a register on the stack. 574 It need not be very fast code. */ 575 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ 576 fprintf (FILE, "\tsubi\t %s,%d\n\tstw\t %s,(%s)\n", \ 577 reg_names[STACK_POINTER_REGNUM], \ 578 (STACK_BOUNDARY / BITS_PER_UNIT), \ 579 reg_names[REGNO], \ 580 reg_names[STACK_POINTER_REGNUM]) 581 582 /* Length in instructions of the code output by ASM_OUTPUT_REG_PUSH. */ 583 #define REG_PUSH_LENGTH 2 584 585 /* This is how to output an insn to pop a register from the stack. */ 586 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ 587 fprintf (FILE, "\tldw\t %s,(%s)\n\taddi\t %s,%d\n", \ 588 reg_names[REGNO], \ 589 reg_names[STACK_POINTER_REGNUM], \ 590 reg_names[STACK_POINTER_REGNUM], \ 591 (STACK_BOUNDARY / BITS_PER_UNIT)) 592 593 594 /* Output a reference to a label. */ 595 #undef ASM_OUTPUT_LABELREF 596 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ 597 fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \ 598 (* targetm.strip_name_encoding) (NAME)) 599 600 /* This is how to output an assembler line 601 that says to advance the location counter 602 to a multiple of 2**LOG bytes. */ 603 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 604 if ((LOG) != 0) \ 605 fprintf (FILE, "\t.align\t%d\n", LOG) 606 607 #ifndef ASM_DECLARE_RESULT 608 #define ASM_DECLARE_RESULT(FILE, RESULT) 609 #endif 610 611 #define MULTIPLE_SYMBOL_SPACES 1 612 613 #define SUPPORTS_ONE_ONLY 1 614 615 /* A pair of macros to output things for the callgraph data. 616 VALUE means (to the tools that reads this info later): 617 0 a call from src to dst 618 1 the call is special (e.g. dst is "unknown" or "alloca") 619 2 the call is special (e.g., the src is a table instead of routine) 620 621 Frame sizes are augmented with timestamps to help later tools 622 differentiate between static entities with same names in different 623 files. */ 624 extern long mcore_current_compilation_timestamp; 625 #define ASM_OUTPUT_CG_NODE(FILE,SRCNAME,VALUE) \ 626 do \ 627 { \ 628 if (mcore_current_compilation_timestamp == 0) \ 629 mcore_current_compilation_timestamp = time (0); \ 630 fprintf ((FILE),"\t.equ\t__$frame$size$_%s_$_%08lx,%d\n", \ 631 (SRCNAME), mcore_current_compilation_timestamp, (VALUE)); \ 632 } \ 633 while (0) 634 635 #define ASM_OUTPUT_CG_EDGE(FILE,SRCNAME,DSTNAME,VALUE) \ 636 do \ 637 { \ 638 fprintf ((FILE),"\t.equ\t__$function$call$_%s_$_%s,%d\n", \ 639 (SRCNAME), (DSTNAME), (VALUE)); \ 640 } \ 641 while (0) 642 643 /* Globalizing directive for a label. */ 644 #define GLOBAL_ASM_OP "\t.export\t" 645 646 /* The prefix to add to user-visible assembler symbols. */ 647 #undef USER_LABEL_PREFIX 648 #define USER_LABEL_PREFIX "" 649 650 /* Make an internal label into a string. */ 651 #undef ASM_GENERATE_INTERNAL_LABEL 652 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \ 653 sprintf (STRING, "*.%s%ld", PREFIX, (long) NUM) 654 655 /* Jump tables must be 32 bit aligned. */ 656 #undef ASM_OUTPUT_CASE_LABEL 657 #define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE) \ 658 fprintf (STREAM, "\t.align 2\n.%s%d:\n", PREFIX, NUM); 659 660 /* Output a relative address. Not needed since jump tables are absolute 661 but we must define it anyway. */ 662 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,BODY,VALUE,REL) \ 663 fputs ("- - - ASM_OUTPUT_ADDR_DIFF_ELT called!\n", STREAM) 664 665 /* Output an element of a dispatch table. */ 666 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE) \ 667 fprintf (STREAM, "\t.long\t.L%d\n", VALUE) 668 669 /* Output various types of constants. */ 670 671 /* This is how to output an assembler line 672 that says to advance the location counter by SIZE bytes. */ 673 #undef ASM_OUTPUT_SKIP 674 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ 675 fprintf (FILE, "\t.fill %d, 1\n", (int)(SIZE)) 676 677 /* This says how to output an assembler line 678 to define a global common symbol, with alignment information. */ 679 /* XXX - for now we ignore the alignment. */ 680 #undef ASM_OUTPUT_ALIGNED_COMMON 681 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 682 do \ 683 { \ 684 if (mcore_dllexport_name_p (NAME)) \ 685 MCORE_EXPORT_NAME (FILE, NAME); \ 686 if (! mcore_dllimport_name_p (NAME)) \ 687 { \ 688 fputs ("\t.comm\t", FILE); \ 689 assemble_name (FILE, NAME); \ 690 fprintf (FILE, ",%lu\n", (unsigned long)(SIZE)); \ 691 } \ 692 } \ 693 while (0) 694 695 /* This says how to output an assembler line 696 to define a local common symbol.... */ 697 #undef ASM_OUTPUT_LOCAL 698 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ 699 (fputs ("\t.lcomm\t", FILE), \ 700 assemble_name (FILE, NAME), \ 701 fprintf (FILE, ",%d\n", (int)SIZE)) 702 703 /* ... and how to define a local common symbol whose alignment 704 we wish to specify. ALIGN comes in as bits, we have to turn 705 it into bytes. */ 706 #undef ASM_OUTPUT_ALIGNED_LOCAL 707 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ 708 do \ 709 { \ 710 fputs ("\t.bss\t", (FILE)); \ 711 assemble_name ((FILE), (NAME)); \ 712 fprintf ((FILE), ",%d,%d\n", (int)(SIZE), (ALIGN) / BITS_PER_UNIT);\ 713 } \ 714 while (0) 715 716 #endif /* ! GCC_MCORE_H */ 717