1 /* Definitions of target machine for GNU compiler, 2 for ATMEL AVR at90s8515, ATmega103/103L, ATmega603/603L microcontrollers. 3 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. 4 Contributed by Denis Chertykov (denisc@overta.ru) 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 /* Names to predefine in the preprocessor for this target machine. */ 24 25 #define TARGET_CPU_CPP_BUILTINS() \ 26 do \ 27 { \ 28 builtin_define_std ("AVR"); \ 29 if (avr_base_arch_macro) \ 30 builtin_define (avr_base_arch_macro); \ 31 if (avr_extra_arch_macro) \ 32 builtin_define (avr_extra_arch_macro); \ 33 if (avr_asm_only_p) \ 34 builtin_define ("__AVR_ASM_ONLY__"); \ 35 if (avr_enhanced_p) \ 36 builtin_define ("__AVR_ENHANCED__"); \ 37 if (avr_mega_p) \ 38 builtin_define ("__AVR_MEGA__"); \ 39 if (TARGET_NO_INTERRUPTS) \ 40 builtin_define ("__NO_INTERRUPTS__"); \ 41 } \ 42 while (0) 43 44 /* This declaration should be present. */ 45 extern int target_flags; 46 47 #define MASK_RTL_DUMP 0x00000010 48 #define MASK_ALL_DEBUG 0x00000FE0 49 #define MASK_ORDER_1 0x00001000 50 #define MASK_INSN_SIZE_DUMP 0x00002000 51 #define MASK_ORDER_2 0x00004000 52 #define MASK_NO_TABLEJUMP 0x00008000 53 #define MASK_INT8 0x00010000 54 #define MASK_NO_INTERRUPTS 0x00020000 55 #define MASK_CALL_PROLOGUES 0x00040000 56 #define MASK_TINY_STACK 0x00080000 57 #define MASK_SHORT_CALLS 0x00100000 58 59 #define TARGET_ORDER_1 (target_flags & MASK_ORDER_1) 60 #define TARGET_ORDER_2 (target_flags & MASK_ORDER_2) 61 #define TARGET_INT8 (target_flags & MASK_INT8) 62 #define TARGET_NO_INTERRUPTS (target_flags & MASK_NO_INTERRUPTS) 63 #define TARGET_INSN_SIZE_DUMP (target_flags & MASK_INSN_SIZE_DUMP) 64 #define TARGET_CALL_PROLOGUES (target_flags & MASK_CALL_PROLOGUES) 65 #define TARGET_TINY_STACK (target_flags & MASK_TINY_STACK) 66 #define TARGET_NO_TABLEJUMP (target_flags & MASK_NO_TABLEJUMP) 67 #define TARGET_SHORT_CALLS (target_flags & MASK_SHORT_CALLS) 68 69 /* Dump each assembler insn's rtl into the output file. 70 This is for debugging the compiler itself. */ 71 72 #define TARGET_RTL_DUMP (target_flags & MASK_RTL_DUMP) 73 #define TARGET_ALL_DEBUG (target_flags & MASK_ALL_DEBUG) 74 75 #define TARGET_SWITCHES { \ 76 { "order1", MASK_ORDER_1, NULL }, \ 77 { "order2", MASK_ORDER_2, NULL }, \ 78 { "int8", MASK_INT8, N_("Assume int to be 8 bit integer") }, \ 79 { "no-interrupts", MASK_NO_INTERRUPTS, \ 80 N_("Change the stack pointer without disabling interrupts") }, \ 81 { "call-prologues", MASK_CALL_PROLOGUES, \ 82 N_("Use subroutines for function prologue/epilogue") }, \ 83 { "tiny-stack", MASK_TINY_STACK, \ 84 N_("Change only the low 8 bits of the stack pointer") }, \ 85 { "no-tablejump", MASK_NO_TABLEJUMP, \ 86 N_("Do not generate tablejump insns") }, \ 87 { "short-calls", MASK_SHORT_CALLS, \ 88 N_("Use rjmp/rcall (limited range) on >8K devices") }, \ 89 { "rtl", MASK_RTL_DUMP, NULL }, \ 90 { "size", MASK_INSN_SIZE_DUMP, \ 91 N_("Output instruction sizes to the asm file") }, \ 92 { "deb", MASK_ALL_DEBUG, NULL }, \ 93 { "", 0, NULL } } 94 95 extern const char *avr_init_stack; 96 extern const char *avr_mcu_name; 97 98 extern const char *avr_base_arch_macro; 99 extern const char *avr_extra_arch_macro; 100 extern int avr_mega_p; 101 extern int avr_enhanced_p; 102 extern int avr_asm_only_p; 103 104 #define AVR_MEGA (avr_mega_p && !TARGET_SHORT_CALLS) 105 #define AVR_ENHANCED (avr_enhanced_p) 106 107 #define TARGET_OPTIONS { \ 108 { "init-stack=", &avr_init_stack, N_("Specify the initial stack address") }, \ 109 { "mcu=", &avr_mcu_name, N_("Specify the MCU name") } } 110 111 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)"); 112 /* This macro is a C statement to print on `stderr' a string 113 describing the particular machine description choice. Every 114 machine description should define `TARGET_VERSION'. For example: 115 116 #ifdef MOTOROLA 117 #define TARGET_VERSION \ 118 fprintf (stderr, " (68k, Motorola syntax)"); 119 #else 120 #define TARGET_VERSION \ 121 fprintf (stderr, " (68k, MIT syntax)"); 122 #endif */ 123 124 #define OVERRIDE_OPTIONS avr_override_options () 125 /* `OVERRIDE_OPTIONS' 126 Sometimes certain combinations of command options do not make 127 sense on a particular target machine. You can define a macro 128 `OVERRIDE_OPTIONS' to take account of this. This macro, if 129 defined, is executed once just after all the command options have 130 been parsed. 131 132 Don't use this macro to turn on various extra optimizations for 133 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */ 134 135 #define CAN_DEBUG_WITHOUT_FP 136 /* Define this macro if debugging can be performed even without a 137 frame pointer. If this macro is defined, GNU CC will turn on the 138 `-fomit-frame-pointer' option whenever `-O' is specified. */ 139 140 /* Define this if most significant byte of a word is the lowest numbered. */ 141 #define BITS_BIG_ENDIAN 0 142 143 /* Define this if most significant byte of a word is the lowest numbered. */ 144 #define BYTES_BIG_ENDIAN 0 145 146 /* Define this if most significant word of a multiword number is the lowest 147 numbered. */ 148 #define WORDS_BIG_ENDIAN 0 149 150 #ifdef IN_LIBGCC2 151 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits). */ 152 #define UNITS_PER_WORD 4 153 #else 154 /* Width of a word, in units (bytes). */ 155 #define UNITS_PER_WORD 1 156 #endif 157 158 /* Width in bits of a pointer. 159 See also the macro `Pmode' defined below. */ 160 #define POINTER_SIZE 16 161 162 163 /* Maximum sized of reasonable data type 164 DImode or Dfmode ... */ 165 #define MAX_FIXED_MODE_SIZE 32 166 167 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ 168 #define PARM_BOUNDARY 8 169 170 /* Allocation boundary (in *bits*) for the code of a function. */ 171 #define FUNCTION_BOUNDARY 8 172 173 /* Alignment of field after `int : 0' in a structure. */ 174 #define EMPTY_FIELD_BOUNDARY 8 175 176 /* No data type wants to be aligned rounder than this. */ 177 #define BIGGEST_ALIGNMENT 8 178 179 180 /* Define this if move instructions will actually fail to work 181 when given unaligned data. */ 182 #define STRICT_ALIGNMENT 0 183 184 /* A C expression for the size in bits of the type `int' on the 185 target machine. If you don't define this, the default is one word. */ 186 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16) 187 188 189 /* A C expression for the size in bits of the type `short' on the 190 target machine. If you don't define this, the default is half a 191 word. (If this would be less than one storage unit, it is rounded 192 up to one unit.) */ 193 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16) 194 195 /* A C expression for the size in bits of the type `long' on the 196 target machine. If you don't define this, the default is one word. */ 197 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32) 198 199 #define MAX_LONG_TYPE_SIZE 32 200 /* Maximum number for the size in bits of the type `long' on the 201 target machine. If this is undefined, the default is 202 `LONG_TYPE_SIZE'. Otherwise, it is the constant value that is the 203 largest value that `LONG_TYPE_SIZE' can have at run-time. This is 204 used in `cpp'. */ 205 206 207 #define LONG_LONG_TYPE_SIZE 64 208 /* A C expression for the size in bits of the type `long long' on the 209 target machine. If you don't define this, the default is two 210 words. If you want to support GNU Ada on your machine, the value 211 of macro must be at least 64. */ 212 213 214 #define FLOAT_TYPE_SIZE 32 215 /* A C expression for the size in bits of the type `float' on the 216 target machine. If you don't define this, the default is one word. */ 217 218 #define DOUBLE_TYPE_SIZE 32 219 /* A C expression for the size in bits of the type `double' on the 220 target machine. If you don't define this, the default is two 221 words. */ 222 223 224 #define LONG_DOUBLE_TYPE_SIZE 32 225 /* A C expression for the size in bits of the type `long double' on 226 the target machine. If you don't define this, the default is two 227 words. */ 228 229 #define DEFAULT_SIGNED_CHAR 1 230 /* An expression whose value is 1 or 0, according to whether the type 231 `char' should be signed or unsigned by default. The user can 232 always override this default with the options `-fsigned-char' and 233 `-funsigned-char'. */ 234 235 /* `DEFAULT_SHORT_ENUMS' 236 A C expression to determine whether to give an `enum' type only as 237 many bytes as it takes to represent the range of possible values 238 of that type. A nonzero value means to do that; a zero value 239 means all `enum' types should be allocated like `int'. 240 241 If you don't define the macro, the default is 0. */ 242 243 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int") 244 /* A C expression for a string describing the name of the data type 245 to use for size values. The typedef name `size_t' is defined 246 using the contents of the string. 247 248 The string can contain more than one keyword. If so, separate 249 them with spaces, and write first any length keyword, then 250 `unsigned' if appropriate, and finally `int'. The string must 251 exactly match one of the data type names defined in the function 252 `init_decl_processing' in the file `c-decl.c'. You may not omit 253 `int' or change the order--that would cause the compiler to crash 254 on startup. 255 256 If you don't define this macro, the default is `"long unsigned 257 int"'. */ 258 259 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int") 260 /* A C expression for a string describing the name of the data type 261 to use for the result of subtracting two pointers. The typedef 262 name `ptrdiff_t' is defined using the contents of the string. See 263 `SIZE_TYPE' above for more information. 264 265 If you don't define this macro, the default is `"long int"'. */ 266 267 268 #define WCHAR_TYPE_SIZE 16 269 /* A C expression for the size in bits of the data type for wide 270 characters. This is used in `cpp', which cannot make use of 271 `WCHAR_TYPE'. */ 272 273 #define FIRST_PSEUDO_REGISTER 36 274 /* Number of hardware registers known to the compiler. They receive 275 numbers 0 through `FIRST_PSEUDO_REGISTER-1'; thus, the first 276 pseudo register's number really is assigned the number 277 `FIRST_PSEUDO_REGISTER'. */ 278 279 #define FIXED_REGISTERS {\ 280 1,1,/* r0 r1 */\ 281 0,0,/* r2 r3 */\ 282 0,0,/* r4 r5 */\ 283 0,0,/* r6 r7 */\ 284 0,0,/* r8 r9 */\ 285 0,0,/* r10 r11 */\ 286 0,0,/* r12 r13 */\ 287 0,0,/* r14 r15 */\ 288 0,0,/* r16 r17 */\ 289 0,0,/* r18 r19 */\ 290 0,0,/* r20 r21 */\ 291 0,0,/* r22 r23 */\ 292 0,0,/* r24 r25 */\ 293 0,0,/* r26 r27 */\ 294 0,0,/* r28 r29 */\ 295 0,0,/* r30 r31 */\ 296 1,1,/* STACK */\ 297 1,1 /* arg pointer */ } 298 /* An initializer that says which registers are used for fixed 299 purposes all throughout the compiled code and are therefore not 300 available for general allocation. These would include the stack 301 pointer, the frame pointer (except on machines where that can be 302 used as a general register when no frame pointer is needed), the 303 program counter on machines where that is considered one of the 304 addressable registers, and any other numbered register with a 305 standard use. 306 307 This information is expressed as a sequence of numbers, separated 308 by commas and surrounded by braces. The Nth number is 1 if 309 register N is fixed, 0 otherwise. 310 311 The table initialized from this macro, and the table initialized by 312 the following one, may be overridden at run time either 313 automatically, by the actions of the macro 314 `CONDITIONAL_REGISTER_USAGE', or by the user with the command 315 options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */ 316 317 #define CALL_USED_REGISTERS { \ 318 1,1,/* r0 r1 */ \ 319 0,0,/* r2 r3 */ \ 320 0,0,/* r4 r5 */ \ 321 0,0,/* r6 r7 */ \ 322 0,0,/* r8 r9 */ \ 323 0,0,/* r10 r11 */ \ 324 0,0,/* r12 r13 */ \ 325 0,0,/* r14 r15 */ \ 326 0,0,/* r16 r17 */ \ 327 1,1,/* r18 r19 */ \ 328 1,1,/* r20 r21 */ \ 329 1,1,/* r22 r23 */ \ 330 1,1,/* r24 r25 */ \ 331 1,1,/* r26 r27 */ \ 332 0,0,/* r28 r29 */ \ 333 1,1,/* r30 r31 */ \ 334 1,1,/* STACK */ \ 335 1,1 /* arg pointer */ } 336 /* Like `FIXED_REGISTERS' but has 1 for each register that is 337 clobbered (in general) by function calls as well as for fixed 338 registers. This macro therefore identifies the registers that are 339 not available for general allocation of values that must live 340 across function calls. 341 342 If a register has 0 in `CALL_USED_REGISTERS', the compiler 343 automatically saves it on function entry and restores it on 344 function exit, if the register is used within the function. */ 345 346 #define NON_SAVING_SETJMP 0 347 /* If this macro is defined and has a nonzero value, it means that 348 `setjmp' and related functions fail to save the registers, or that 349 `longjmp' fails to restore them. To compensate, the compiler 350 avoids putting variables in registers in functions that use 351 `setjmp'. */ 352 353 #define REG_ALLOC_ORDER { \ 354 24,25, \ 355 18,19, \ 356 20,21, \ 357 22,23, \ 358 30,31, \ 359 26,27, \ 360 28,29, \ 361 17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2, \ 362 0,1, \ 363 32,33,34,35 \ 364 } 365 /* If defined, an initializer for a vector of integers, containing the 366 numbers of hard registers in the order in which GNU CC should 367 prefer to use them (from most preferred to least). 368 369 If this macro is not defined, registers are used lowest numbered 370 first (all else being equal). 371 372 One use of this macro is on machines where the highest numbered 373 registers must always be saved and the save-multiple-registers 374 instruction supports only sequences of consetionve registers. On 375 such machines, define `REG_ALLOC_ORDER' to be an initializer that 376 lists the highest numbered allocatable register first. */ 377 378 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc () 379 /* ORDER_REGS_FOR_LOCAL_ALLOC' 380 A C statement (sans semicolon) to choose the order in which to 381 allocate hard registers for pseudo-registers local to a basic 382 block. 383 384 Store the desired register order in the array `reg_alloc_order'. 385 Element 0 should be the register to allocate first; element 1, the 386 next register; and so on. 387 388 The macro body should not assume anything about the contents of 389 `reg_alloc_order' before execution of the macro. 390 391 On most machines, it is not necessary to define this macro. */ 392 393 394 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 395 396 /* A C expression for the number of consecutive hard registers, 397 starting at register number REGNO, required to hold a value of mode 398 MODE. 399 400 On a machine where all registers are exactly one word, a suitable 401 definition of this macro is 402 403 #define HARD_REGNO_NREGS(REGNO, MODE) \ 404 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \ 405 / UNITS_PER_WORD)) */ 406 407 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE) 408 /* A C expression that is nonzero if it is permissible to store a 409 value of mode MODE in hard register number REGNO (or in several 410 registers starting with that one). For a machine where all 411 registers are equivalent, a suitable definition is 412 413 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1 414 415 It is not necessary for this macro to check for the numbers of 416 fixed registers, because the allocation mechanism considers them 417 to be always occupied. 418 419 On some machines, double-precision values must be kept in even/odd 420 register pairs. The way to implement that is to define this macro 421 to reject odd register numbers for such modes. 422 423 The minimum requirement for a mode to be OK in a register is that 424 the `movMODE' instruction pattern support moves between the 425 register and any other hard register for which the mode is OK; and 426 that moving a value into the register and back out not alter it. 427 428 Since the same instruction used to move `SImode' will work for all 429 narrower integer modes, it is not necessary on any machine for 430 `HARD_REGNO_MODE_OK' to distinguish between these modes, provided 431 you define patterns `movhi', etc., to take advantage of this. This 432 is useful because of the interaction between `HARD_REGNO_MODE_OK' 433 and `MODES_TIEABLE_P'; it is very desirable for all integer modes 434 to be tieable. 435 436 Many machines have special registers for floating point arithmetic. 437 Often people assume that floating point machine modes are allowed 438 only in floating point registers. This is not true. Any 439 registers that can hold integers can safely *hold* a floating 440 point machine mode, whether or not floating arithmetic can be done 441 on it in those registers. Integer move instructions can be used 442 to move the values. 443 444 On some machines, though, the converse is true: fixed-point machine 445 modes may not go in floating registers. This is true if the 446 floating registers normalize any value stored in them, because 447 storing a non-floating value there would garble it. In this case, 448 `HARD_REGNO_MODE_OK' should reject fixed-point machine modes in 449 floating registers. But if the floating registers do not 450 automatically normalize, if you can store any bit pattern in one 451 and retrieve it unchanged without a trap, then any machine mode 452 may go in a floating register, so you can define this macro to say 453 so. 454 455 The primary significance of special floating registers is rather 456 that they are the registers acceptable in floating point arithmetic 457 instructions. However, this is of no concern to 458 `HARD_REGNO_MODE_OK'. You handle it by writing the proper 459 constraints for those instructions. 460 461 On some machines, the floating registers are especially slow to 462 access, so that it is better to store a value in a stack frame 463 than in such a register if floating point arithmetic is not being 464 done. As long as the floating registers are not in class 465 `GENERAL_REGS', they will not be used unless some pattern's 466 constraint asks for one. */ 467 468 #define MODES_TIEABLE_P(MODE1, MODE2) 0 469 /* A C expression that is nonzero if it is desirable to choose 470 register allocation so as to avoid move instructions between a 471 value of mode MODE1 and a value of mode MODE2. 472 473 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, 474 MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1, 475 MODE2)' must be zero. */ 476 477 enum reg_class { 478 NO_REGS, 479 R0_REG, /* r0 */ 480 POINTER_X_REGS, /* r26 - r27 */ 481 POINTER_Y_REGS, /* r28 - r29 */ 482 POINTER_Z_REGS, /* r30 - r31 */ 483 STACK_REG, /* STACK */ 484 BASE_POINTER_REGS, /* r28 - r31 */ 485 POINTER_REGS, /* r26 - r31 */ 486 ADDW_REGS, /* r24 - r31 */ 487 SIMPLE_LD_REGS, /* r16 - r23 */ 488 LD_REGS, /* r16 - r31 */ 489 NO_LD_REGS, /* r0 - r15 */ 490 GENERAL_REGS, /* r0 - r31 */ 491 ALL_REGS, LIM_REG_CLASSES 492 }; 493 /* An enumeral type that must be defined with all the register class 494 names as enumeral values. `NO_REGS' must be first. `ALL_REGS' 495 must be the last register class, followed by one more enumeral 496 value, `LIM_REG_CLASSES', which is not a register class but rather 497 tells how many classes there are. 498 499 Each register class has a number, which is the value of casting 500 the class name to type `int'. The number serves as an index in 501 many of the tables described below. */ 502 503 504 #define N_REG_CLASSES (int)LIM_REG_CLASSES 505 /* The number of distinct register classes, defined as follows: 506 507 #define N_REG_CLASSES (int) LIM_REG_CLASSES */ 508 509 #define REG_CLASS_NAMES { \ 510 "NO_REGS", \ 511 "R0_REG", /* r0 */ \ 512 "POINTER_X_REGS", /* r26 - r27 */ \ 513 "POINTER_Y_REGS", /* r28 - r29 */ \ 514 "POINTER_Z_REGS", /* r30 - r31 */ \ 515 "STACK_REG", /* STACK */ \ 516 "BASE_POINTER_REGS", /* r28 - r31 */ \ 517 "POINTER_REGS", /* r26 - r31 */ \ 518 "ADDW_REGS", /* r24 - r31 */ \ 519 "SIMPLE_LD_REGS", /* r16 - r23 */ \ 520 "LD_REGS", /* r16 - r31 */ \ 521 "NO_LD_REGS", /* r0 - r15 */ \ 522 "GENERAL_REGS", /* r0 - r31 */ \ 523 "ALL_REGS" } 524 /* An initializer containing the names of the register classes as C 525 string constants. These names are used in writing some of the 526 debugging dumps. */ 527 528 #define REG_X 26 529 #define REG_Y 28 530 #define REG_Z 30 531 #define REG_W 24 532 533 #define REG_CLASS_CONTENTS { \ 534 {0x00000000,0x00000000}, /* NO_REGS */ \ 535 {0x00000001,0x00000000}, /* R0_REG */ \ 536 {3 << REG_X,0x00000000}, /* POINTER_X_REGS, r26 - r27 */ \ 537 {3 << REG_Y,0x00000000}, /* POINTER_Y_REGS, r28 - r29 */ \ 538 {3 << REG_Z,0x00000000}, /* POINTER_Z_REGS, r30 - r31 */ \ 539 {0x00000000,0x00000003}, /* STACK_REG, STACK */ \ 540 {(3 << REG_Y) | (3 << REG_Z), \ 541 0x00000000}, /* BASE_POINTER_REGS, r28 - r31 */ \ 542 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z), \ 543 0x00000000}, /* POINTER_REGS, r26 - r31 */ \ 544 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W), \ 545 0x00000000}, /* ADDW_REGS, r24 - r31 */ \ 546 {0x00ff0000,0x00000000}, /* SIMPLE_LD_REGS r16 - r23 */ \ 547 {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16), \ 548 0x00000000}, /* LD_REGS, r16 - r31 */ \ 549 {0x0000ffff,0x00000000}, /* NO_LD_REGS r0 - r15 */ \ 550 {0xffffffff,0x00000000}, /* GENERAL_REGS, r0 - r31 */ \ 551 {0xffffffff,0x00000003} /* ALL_REGS */ \ 552 } 553 /* An initializer containing the contents of the register classes, as 554 integers which are bit masks. The Nth integer specifies the 555 contents of class N. The way the integer MASK is interpreted is 556 that register R is in the class if `MASK & (1 << R)' is 1. 557 558 When the machine has more than 32 registers, an integer does not 559 suffice. Then the integers are replaced by sub-initializers, 560 braced groupings containing several integers. Each 561 sub-initializer must be suitable as an initializer for the type 562 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */ 563 564 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R) 565 /* A C expression whose value is a register class containing hard 566 register REGNO. In general there is more than one such class; 567 choose a class which is "minimal", meaning that no smaller class 568 also contains the register. */ 569 570 #define BASE_REG_CLASS POINTER_REGS 571 /* A macro whose definition is the name of the class to which a valid 572 base register must belong. A base register is one used in an 573 address which is the register value plus a displacement. */ 574 575 #define INDEX_REG_CLASS NO_REGS 576 /* A macro whose definition is the name of the class to which a valid 577 index register must belong. An index register is one used in an 578 address where its value is either multiplied by a scale factor or 579 added to another register (as well as added to a displacement). */ 580 581 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C) 582 /* A C expression which defines the machine-dependent operand 583 constraint letters for register classes. If CHAR is such a 584 letter, the value should be the register class corresponding to 585 it. Otherwise, the value should be `NO_REGS'. The register 586 letter `r', corresponding to class `GENERAL_REGS', will not be 587 passed to this macro; you do not need to handle it. */ 588 589 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER \ 590 && ((r) == REG_X \ 591 || (r) == REG_Y \ 592 || (r) == REG_Z \ 593 || (r) == ARG_POINTER_REGNUM)) \ 594 || (reg_renumber \ 595 && (reg_renumber[r] == REG_X \ 596 || reg_renumber[r] == REG_Y \ 597 || reg_renumber[r] == REG_Z \ 598 || (reg_renumber[r] \ 599 == ARG_POINTER_REGNUM)))) 600 /* A C expression which is nonzero if register number NUM is suitable 601 for use as a base register in operand addresses. It may be either 602 a suitable hard register or a pseudo register that has been 603 allocated such a hard register. */ 604 605 /* #define REGNO_MODE_OK_FOR_BASE_P(r, m) regno_mode_ok_for_base_p(r, m) 606 A C expression that is just like `REGNO_OK_FOR_BASE_P', except that 607 that expression may examine the mode of the memory reference in 608 MODE. You should define this macro if the mode of the memory 609 reference affects whether a register may be used as a base 610 register. If you define this macro, the compiler will use it 611 instead of `REGNO_OK_FOR_BASE_P'. */ 612 613 #define REGNO_OK_FOR_INDEX_P(NUM) 0 614 /* A C expression which is nonzero if register number NUM is suitable 615 for use as an index register in operand addresses. It may be 616 either a suitable hard register or a pseudo register that has been 617 allocated such a hard register. 618 619 The difference between an index register and a base register is 620 that the index register may be scaled. If an address involves the 621 sum of two registers, neither one of them scaled, then either one 622 may be labeled the "base" and the other the "index"; but whichever 623 labeling is used must fit the machine's constraints of which 624 registers may serve in each capacity. The compiler will try both 625 labelings, looking for one that is valid, and will reload one or 626 both registers only if neither labeling works. */ 627 628 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS) 629 /* A C expression that places additional restrictions on the register 630 class to use when it is necessary to copy value X into a register 631 in class CLASS. The value is a register class; perhaps CLASS, or 632 perhaps another, smaller class. On many machines, the following 633 definition is safe: 634 635 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS 636 637 Sometimes returning a more restrictive class makes better code. 638 For example, on the 68000, when X is an integer constant that is 639 in range for a `moveq' instruction, the value of this macro is 640 always `DATA_REGS' as long as CLASS includes the data registers. 641 Requiring a data register guarantees that a `moveq' will be used. 642 643 If X is a `const_double', by returning `NO_REGS' you can force X 644 into a memory constant. This is useful on certain machines where 645 immediate floating values cannot be loaded into certain kinds of 646 registers. */ 647 /* `PREFERRED_OUTPUT_RELOAD_CLASS (X, CLASS)' 648 Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of 649 input reloads. If you don't define this macro, the default is to 650 use CLASS, unchanged. */ 651 652 /* `LIMIT_RELOAD_CLASS (MODE, CLASS)' 653 A C expression that places additional restrictions on the register 654 class to use when it is necessary to be able to hold a value of 655 mode MODE in a reload register for which class CLASS would 656 ordinarily be used. 657 658 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when 659 there are certain modes that simply can't go in certain reload 660 classes. 661 662 The value is a register class; perhaps CLASS, or perhaps another, 663 smaller class. 664 665 Don't define this macro unless the target machine has limitations 666 which require the macro to do something nontrivial. */ 667 668 /* SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) 669 `SECONDARY_RELOAD_CLASS (CLASS, MODE, X)' 670 `SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X)' 671 Many machines have some registers that cannot be copied directly 672 to or from memory or even from other types of registers. An 673 example is the `MQ' register, which on most machines, can only be 674 copied to or from general registers, but not memory. Some 675 machines allow copying all registers to and from memory, but 676 require a scratch register for stores to some memory locations 677 (e.g., those with symbolic address on the RT, and those with 678 certain symbolic address on the SPARC when compiling PIC). In 679 some cases, both an intermediate and a scratch register are 680 required. 681 682 You should define these macros to indicate to the reload phase 683 that it may need to allocate at least one register for a reload in 684 addition to the register to contain the data. Specifically, if 685 copying X to a register CLASS in MODE requires an intermediate 686 register, you should define `SECONDARY_INPUT_RELOAD_CLASS' to 687 return the largest register class all of whose registers can be 688 used as intermediate registers or scratch registers. 689 690 If copying a register CLASS in MODE to X requires an intermediate 691 or scratch register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be 692 defined to return the largest register class required. If the 693 requirements for input and output reloads are the same, the macro 694 `SECONDARY_RELOAD_CLASS' should be used instead of defining both 695 macros identically. 696 697 The values returned by these macros are often `GENERAL_REGS'. 698 Return `NO_REGS' if no spare register is needed; i.e., if X can be 699 directly copied to or from a register of CLASS in MODE without 700 requiring a scratch register. Do not define this macro if it 701 would always return `NO_REGS'. 702 703 If a scratch register is required (either with or without an 704 intermediate register), you should define patterns for 705 `reload_inM' or `reload_outM', as required (*note Standard 706 Names::.. These patterns, which will normally be implemented with 707 a `define_expand', should be similar to the `movM' patterns, 708 except that operand 2 is the scratch register. 709 710 Define constraints for the reload register and scratch register 711 that contain a single register class. If the original reload 712 register (whose class is CLASS) can meet the constraint given in 713 the pattern, the value returned by these macros is used for the 714 class of the scratch register. Otherwise, two additional reload 715 registers are required. Their classes are obtained from the 716 constraints in the insn pattern. 717 718 X might be a pseudo-register or a `subreg' of a pseudo-register, 719 which could either be in a hard register or in memory. Use 720 `true_regnum' to find out; it will return -1 if the pseudo is in 721 memory and the hard register number if it is in a register. 722 723 These macros should not be used in the case where a particular 724 class of registers can only be copied to memory and not to another 725 class of registers. In that case, secondary reload registers are 726 not needed and would not be helpful. Instead, a stack location 727 must be used to perform the copy and the `movM' pattern should use 728 memory as an intermediate storage. This case often occurs between 729 floating-point and general registers. */ 730 731 /* `SECONDARY_MEMORY_NEEDED (CLASS1, CLASS2, M)' 732 Certain machines have the property that some registers cannot be 733 copied to some other registers without using memory. Define this 734 macro on those machines to be a C expression that is nonzero if 735 objects of mode M in registers of CLASS1 can only be copied to 736 registers of class CLASS2 by storing a register of CLASS1 into 737 memory and loading that memory location into a register of CLASS2. 738 739 Do not define this macro if its value would always be zero. 740 741 `SECONDARY_MEMORY_NEEDED_RTX (MODE)' 742 Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler 743 allocates a stack slot for a memory location needed for register 744 copies. If this macro is defined, the compiler instead uses the 745 memory location defined by this macro. 746 747 Do not define this macro if you do not define 748 `SECONDARY_MEMORY_NEEDED'. */ 749 750 #define SMALL_REGISTER_CLASSES 1 751 /* Normally the compiler avoids choosing registers that have been 752 explicitly mentioned in the rtl as spill registers (these 753 registers are normally those used to pass parameters and return 754 values). However, some machines have so few registers of certain 755 classes that there would not be enough registers to use as spill 756 registers if this were done. 757 758 Define `SMALL_REGISTER_CLASSES' to be an expression with a nonzero 759 value on these machines. When this macro has a nonzero value, the 760 compiler allows registers explicitly used in the rtl to be used as 761 spill registers but avoids extending the lifetime of these 762 registers. 763 764 It is always safe to define this macro with a nonzero value, but 765 if you unnecessarily define it, you will reduce the amount of 766 optimizations that can be performed in some cases. If you do not 767 define this macro with a nonzero value when it is required, the 768 compiler will run out of spill registers and print a fatal error 769 message. For most machines, you should not define this macro at 770 all. */ 771 772 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c) 773 /* A C expression whose value is nonzero if pseudos that have been 774 assigned to registers of class CLASS would likely be spilled 775 because registers of CLASS are needed for spill registers. 776 777 The default value of this macro returns 1 if CLASS has exactly one 778 register and zero otherwise. On most machines, this default 779 should be used. Only define this macro to some other expression 780 if pseudo allocated by `local-alloc.c' end up in memory because 781 their hard registers were needed for spill registers. If this 782 macro returns nonzero for those classes, those pseudos will only 783 be allocated by `global.c', which knows how to reallocate the 784 pseudo to another register. If there would not be another 785 register available for reallocation, you should not change the 786 definition of this macro since the only effect of such a 787 definition would be to slow down register allocation. */ 788 789 #define CLASS_MAX_NREGS(CLASS, MODE) class_max_nregs (CLASS, MODE) 790 /* A C expression for the maximum number of consecutive registers of 791 class CLASS needed to hold a value of mode MODE. 792 793 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, 794 the value of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be 795 the maximum value of `HARD_REGNO_NREGS (REGNO, MODE)' for all 796 REGNO values in the class CLASS. 797 798 This macro helps control the handling of multiple-word values in 799 the reload pass. */ 800 801 #define CONST_OK_FOR_LETTER_P(VALUE, C) \ 802 ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 : \ 803 (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63: \ 804 (C) == 'K' ? (VALUE) == 2 : \ 805 (C) == 'L' ? (VALUE) == 0 : \ 806 (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff : \ 807 (C) == 'N' ? (VALUE) == -1: \ 808 (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \ 809 (C) == 'P' ? (VALUE) == 1 : \ 810 0) 811 812 /* A C expression that defines the machine-dependent operand 813 constraint letters (`I', `J', `K', ... `P') that specify 814 particular ranges of integer values. If C is one of those 815 letters, the expression should check that VALUE, an integer, is in 816 the appropriate range and return 1 if so, 0 otherwise. If C is 817 not one of those letters, the value should be 0 regardless of 818 VALUE. */ 819 820 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ 821 ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode) \ 822 : 0) 823 /* `CONST_DOUBLE_OK_FOR_LETTER_P (VALUE, C)' 824 A C expression that defines the machine-dependent operand 825 constraint letters that specify particular ranges of 826 `const_double' values (`G' or `H'). 827 828 If C is one of those letters, the expression should check that 829 VALUE, an RTX of code `const_double', is in the appropriate range 830 and return 1 if so, 0 otherwise. If C is not one of those 831 letters, the value should be 0 regardless of VALUE. 832 833 `const_double' is used for all floating-point constants and for 834 `DImode' fixed-point constants. A given letter can accept either 835 or both kinds of values. It can use `GET_MODE' to distinguish 836 between these kinds. */ 837 838 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c) 839 /* A C expression that defines the optional machine-dependent 840 constraint letters (``Q', `R', `S', `T', `U') that can' 841 be used to segregate specific types of operands, usually memory 842 references, for the target machine. Normally this macro will not 843 be defined. If it is required for a particular target machine, it 844 should return 1 if VALUE corresponds to the operand type 845 represented by the constraint letter C. If C is not defined as an 846 extra constraint, the value returned should be 0 regardless of 847 VALUE. 848 849 For example, on the ROMP, load instructions cannot have their 850 output in r0 if the memory reference contains a symbolic address. 851 Constraint letter `Q' is defined as representing a memory address 852 that does *not* contain a symbolic address. An alternative is 853 specified with a `Q' constraint on the input and `r' on the 854 output. The next alternative specifies `m' on the input and a 855 register class that does not include r0 on the output. */ 856 857 /* This is an undocumented variable which describes 858 how GCC will push a data */ 859 #define STACK_PUSH_CODE POST_DEC 860 861 #define STACK_GROWS_DOWNWARD 862 /* Define this macro if pushing a word onto the stack moves the stack 863 pointer to a smaller address. 864 865 When we say, "define this macro if ...," it means that the 866 compiler checks this macro only with `#ifdef' so the precise 867 definition used does not matter. */ 868 869 #define STARTING_FRAME_OFFSET 1 870 /* Offset from the frame pointer to the first local variable slot to 871 be allocated. 872 873 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by 874 subtracting the first slot's length from `STARTING_FRAME_OFFSET'. 875 Otherwise, it is found by adding the length of the first slot to 876 the value `STARTING_FRAME_OFFSET'. */ 877 878 #define STACK_POINTER_OFFSET 1 879 /* Offset from the stack pointer register to the first location at 880 which outgoing arguments are placed. If not specified, the 881 default value of zero is used. This is the proper value for most 882 machines. 883 884 If `ARGS_GROW_DOWNWARD', this is the offset to the location above 885 the first location at which outgoing arguments are placed. */ 886 887 #define FIRST_PARM_OFFSET(FUNDECL) 0 888 /* Offset from the argument pointer register to the first argument's 889 address. On some machines it may depend on the data type of the 890 function. 891 892 If `ARGS_GROW_DOWNWARD', this is the offset to the location above 893 the first argument's address. */ 894 895 /* `STACK_DYNAMIC_OFFSET (FUNDECL)' 896 Offset from the stack pointer register to an item dynamically 897 allocated on the stack, e.g., by `alloca'. 898 899 The default value for this macro is `STACK_POINTER_OFFSET' plus the 900 length of the outgoing arguments. The default is correct for most 901 machines. See `function.c' for details. */ 902 903 #define STACK_BOUNDARY 8 904 /* Define this macro if there is a guaranteed alignment for the stack 905 pointer on this machine. The definition is a C expression for the 906 desired alignment (measured in bits). This value is used as a 907 default if PREFERRED_STACK_BOUNDARY is not defined. */ 908 909 #define STACK_POINTER_REGNUM 32 910 /* The register number of the stack pointer register, which must also 911 be a fixed register according to `FIXED_REGISTERS'. On most 912 machines, the hardware determines which register this is. */ 913 914 #define FRAME_POINTER_REGNUM REG_Y 915 /* The register number of the frame pointer register, which is used to 916 access automatic variables in the stack frame. On some machines, 917 the hardware determines which register this is. On other 918 machines, you can choose any register you wish for this purpose. */ 919 920 #define ARG_POINTER_REGNUM 34 921 /* The register number of the arg pointer register, which is used to 922 access the function's argument list. On some machines, this is 923 the same as the frame pointer register. On some machines, the 924 hardware determines which register this is. On other machines, 925 you can choose any register you wish for this purpose. If this is 926 not the same register as the frame pointer register, then you must 927 mark it as a fixed register according to `FIXED_REGISTERS', or 928 arrange to be able to eliminate it (*note Elimination::.). */ 929 930 #define STATIC_CHAIN_REGNUM 2 931 /* Register numbers used for passing a function's static chain 932 pointer. If register windows are used, the register number as 933 seen by the called function is `STATIC_CHAIN_INCOMING_REGNUM', 934 while the register number as seen by the calling function is 935 `STATIC_CHAIN_REGNUM'. If these registers are the same, 936 `STATIC_CHAIN_INCOMING_REGNUM' need not be defined. 937 938 The static chain register need not be a fixed register. 939 940 If the static chain is passed in memory, these macros should not be 941 defined; instead, the next two macros should be defined. */ 942 943 #define FRAME_POINTER_REQUIRED frame_pointer_required_p() 944 /* A C expression which is nonzero if a function must have and use a 945 frame pointer. This expression is evaluated in the reload pass. 946 If its value is nonzero the function will have a frame pointer. 947 948 The expression can in principle examine the current function and 949 decide according to the facts, but on most machines the constant 0 950 or the constant 1 suffices. Use 0 when the machine allows code to 951 be generated with no frame pointer, and doing so saves some time 952 or space. Use 1 when there is no possible advantage to avoiding a 953 frame pointer. 954 955 In certain cases, the compiler does not know how to produce valid 956 code without a frame pointer. The compiler recognizes those cases 957 and automatically gives the function a frame pointer regardless of 958 what `FRAME_POINTER_REQUIRED' says. You don't need to worry about 959 them. 960 961 In a function that does not require a frame pointer, the frame 962 pointer register can be allocated for ordinary usage, unless you 963 mark it as a fixed register. See `FIXED_REGISTERS' for more 964 information. */ 965 966 #define ELIMINABLE_REGS { \ 967 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ 968 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \ 969 ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}} 970 /* If defined, this macro specifies a table of register pairs used to 971 eliminate unneeded registers that point into the stack frame. If 972 it is not defined, the only elimination attempted by the compiler 973 is to replace references to the frame pointer with references to 974 the stack pointer. 975 976 The definition of this macro is a list of structure 977 initializations, each of which specifies an original and 978 replacement register. 979 980 On some machines, the position of the argument pointer is not 981 known until the compilation is completed. In such a case, a 982 separate hard register must be used for the argument pointer. 983 This register can be eliminated by replacing it with either the 984 frame pointer or the argument pointer, depending on whether or not 985 the frame pointer has been eliminated. 986 987 In this case, you might specify: 988 #define ELIMINABLE_REGS \ 989 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 990 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ 991 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} 992 993 Note that the elimination of the argument pointer with the stack 994 pointer is specified first since that is the preferred elimination. */ 995 996 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM \ 997 && (TO) == FRAME_POINTER_REGNUM) \ 998 || (((FROM) == FRAME_POINTER_REGNUM \ 999 || (FROM) == FRAME_POINTER_REGNUM+1) \ 1000 && ! FRAME_POINTER_REQUIRED \ 1001 )) 1002 /* A C expression that returns nonzero if the compiler is allowed to 1003 try to replace register number FROM-REG with register number 1004 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is 1005 defined, and will usually be the constant 1, since most of the 1006 cases preventing register elimination are things that the compiler 1007 already knows about. */ 1008 1009 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 1010 OFFSET = initial_elimination_offset (FROM, TO) 1011 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It 1012 specifies the initial difference between the specified pair of 1013 registers. This macro must be defined if `ELIMINABLE_REGS' is 1014 defined. */ 1015 1016 #define RETURN_ADDR_RTX(count, x) \ 1017 gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1))) 1018 1019 #define PUSH_ROUNDING(NPUSHED) (NPUSHED) 1020 /* A C expression that is the number of bytes actually pushed onto the 1021 stack when an instruction attempts to push NPUSHED bytes. 1022 1023 If the target machine does not have a push instruction, do not 1024 define this macro. That directs GNU CC to use an alternate 1025 strategy: to allocate the entire argument block and then store the 1026 arguments into it. 1027 1028 On some machines, the definition 1029 1030 #define PUSH_ROUNDING(BYTES) (BYTES) 1031 1032 will suffice. But on other machines, instructions that appear to 1033 push one byte actually push two bytes in an attempt to maintain 1034 alignment. Then the definition should be 1035 1036 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */ 1037 1038 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0 1039 /* A C expression that should indicate the number of bytes of its own 1040 arguments that a function pops on returning, or 0 if the function 1041 pops no arguments and the caller must therefore pop them all after 1042 the function returns. 1043 1044 FUNDECL is a C variable whose value is a tree node that describes 1045 the function in question. Normally it is a node of type 1046 `FUNCTION_DECL' that describes the declaration of the function. 1047 From this you can obtain the DECL_ATTRIBUTES of the 1048 function. 1049 1050 FUNTYPE is a C variable whose value is a tree node that describes 1051 the function in question. Normally it is a node of type 1052 `FUNCTION_TYPE' that describes the data type of the function. 1053 From this it is possible to obtain the data types of the value and 1054 arguments (if known). 1055 1056 When a call to a library function is being considered, FUNDECL 1057 will contain an identifier node for the library function. Thus, if 1058 you need to distinguish among various library functions, you can 1059 do so by their names. Note that "library function" in this 1060 context means a function used to perform arithmetic, whose name is 1061 known specially in the compiler and was not mentioned in the C 1062 code being compiled. 1063 1064 STACK-SIZE is the number of bytes of arguments passed on the 1065 stack. If a variable number of bytes is passed, it is zero, and 1066 argument popping will always be the responsibility of the calling 1067 function. 1068 1069 On the VAX, all functions always pop their arguments, so the 1070 definition of this macro is STACK-SIZE. On the 68000, using the 1071 standard calling convention, no functions pop their arguments, so 1072 the value of the macro is always 0 in this case. But an 1073 alternative calling convention is available in which functions 1074 that take a fixed number of arguments pop them but other functions 1075 (such as `printf') pop nothing (the caller pops all). When this 1076 convention is in use, FUNTYPE is examined to determine whether a 1077 function takes a fixed number of arguments. */ 1078 1079 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED)) 1080 /* A C expression that controls whether a function argument is passed 1081 in a register, and which register. 1082 1083 The arguments are CUM, which summarizes all the previous 1084 arguments; MODE, the machine mode of the argument; TYPE, the data 1085 type of the argument as a tree node or 0 if that is not known 1086 (which happens for C support library functions); and NAMED, which 1087 is 1 for an ordinary argument and 0 for nameless arguments that 1088 correspond to `...' in the called function's prototype. 1089 1090 The value of the expression is usually either a `reg' RTX for the 1091 hard register in which to pass the argument, or zero to pass the 1092 argument on the stack. 1093 1094 For machines like the VAX and 68000, where normally all arguments 1095 are pushed, zero suffices as a definition. 1096 1097 The value of the expression can also be a `parallel' RTX. This is 1098 used when an argument is passed in multiple locations. The mode 1099 of the of the `parallel' should be the mode of the entire 1100 argument. The `parallel' holds any number of `expr_list' pairs; 1101 each one describes where part of the argument is passed. In each 1102 `expr_list', the first operand can be either a `reg' RTX for the 1103 hard register in which to pass this part of the argument, or zero 1104 to pass the argument on the stack. If this operand is a `reg', 1105 then the mode indicates how large this part of the argument is. 1106 The second operand of the `expr_list' is a `const_int' which gives 1107 the offset in bytes into the entire argument where this part 1108 starts. 1109 1110 The usual way to make the ANSI library `stdarg.h' work on a machine 1111 where some arguments are usually passed in registers, is to cause 1112 nameless arguments to be passed on the stack instead. This is done 1113 by making `FUNCTION_ARG' return 0 whenever NAMED is 0. 1114 1115 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the 1116 definition of this macro to determine if this argument is of a 1117 type that must be passed in the stack. If `REG_PARM_STACK_SPACE' 1118 is not defined and `FUNCTION_ARG' returns nonzero for such an 1119 argument, the compiler will abort. If `REG_PARM_STACK_SPACE' is 1120 defined, the argument will be computed in the stack and then 1121 loaded into a register. */ 1122 1123 typedef struct avr_args { 1124 int nregs; /* # registers available for passing */ 1125 int regno; /* next available register number */ 1126 } CUMULATIVE_ARGS; 1127 /* A C type for declaring a variable that is used as the first 1128 argument of `FUNCTION_ARG' and other related values. For some 1129 target machines, the type `int' suffices and can hold the number 1130 of bytes of argument so far. 1131 1132 There is no need to record in `CUMULATIVE_ARGS' anything about the 1133 arguments that have been passed on the stack. The compiler has 1134 other variables to keep track of that. For target machines on 1135 which all arguments are passed on the stack, there is no need to 1136 store anything in `CUMULATIVE_ARGS'; however, the data structure 1137 must exist and should not be empty, so use `int'. */ 1138 1139 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) init_cumulative_args (&(CUM), FNTYPE, LIBNAME, INDIRECT) 1140 1141 /* A C statement (sans semicolon) for initializing the variable CUM 1142 for the state at the beginning of the argument list. The variable 1143 has type `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node 1144 for the data type of the function which will receive the args, or 0 1145 if the args are to a compiler support library function. The value 1146 of INDIRECT is nonzero when processing an indirect call, for 1147 example a call through a function pointer. The value of INDIRECT 1148 is zero for a call to an explicitly named function, a library 1149 function call, or when `INIT_CUMULATIVE_ARGS' is used to find 1150 arguments for the function being compiled. 1151 1152 When processing a call to a compiler support library function, 1153 LIBNAME identifies which one. It is a `symbol_ref' rtx which 1154 contains the name of the function, as a string. LIBNAME is 0 when 1155 an ordinary C function call is being processed. Thus, each time 1156 this macro is called, either LIBNAME or FNTYPE is nonzero, but 1157 never both of them at once. */ 1158 1159 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ 1160 (function_arg_advance (&CUM, MODE, TYPE, NAMED)) 1161 1162 /* A C statement (sans semicolon) to update the summarizer variable 1163 CUM to advance past an argument in the argument list. The values 1164 MODE, TYPE and NAMED describe that argument. Once this is done, 1165 the variable CUM is suitable for analyzing the *following* 1166 argument with `FUNCTION_ARG', etc. 1167 1168 This macro need not do anything if the argument in question was 1169 passed on the stack. The compiler knows how to track the amount 1170 of stack space used for arguments without any special help. */ 1171 1172 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r) 1173 /* A C expression that is nonzero if REGNO is the number of a hard 1174 register in which function arguments are sometimes passed. This 1175 does *not* include implicit arguments such as the static chain and 1176 the structure-value address. On many machines, no registers can be 1177 used for this purpose since all function arguments are pushed on 1178 the stack. */ 1179 1180 extern int avr_reg_order[]; 1181 1182 #define RET_REGISTER avr_ret_register () 1183 1184 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC) 1185 /* A C expression to create an RTX representing the place where a 1186 function returns a value of data type VALTYPE. VALTYPE is a tree 1187 node representing a data type. Write `TYPE_MODE (VALTYPE)' to get 1188 the machine mode used to represent that type. On many machines, 1189 only the mode is relevant. (Actually, on most machines, scalar 1190 values are returned in the same place regardless of mode). 1191 1192 The value of the expression is usually a `reg' RTX for the hard 1193 register where the return value is stored. The value can also be a 1194 `parallel' RTX, if the return value is in multiple places. See 1195 `FUNCTION_ARG' for an explanation of the `parallel' form. 1196 1197 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same 1198 promotion rules specified in `PROMOTE_MODE' if VALTYPE is a scalar 1199 type. 1200 1201 If the precise function being called is known, FUNC is a tree node 1202 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This 1203 makes it possible to use a different value-returning convention 1204 for specific functions when all their calls are known. 1205 1206 `FUNCTION_VALUE' is not used for return vales with aggregate data 1207 types, because these are returned in another way. See 1208 `STRUCT_VALUE_REGNUM' and related macros, below. */ 1209 1210 #define LIBCALL_VALUE(MODE) avr_libcall_value (MODE) 1211 /* A C expression to create an RTX representing the place where a 1212 library function returns a value of mode MODE. If the precise 1213 function being called is known, FUNC is a tree node 1214 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This 1215 makes it possible to use a different value-returning convention 1216 for specific functions when all their calls are known. 1217 1218 Note that "library function" in this context means a compiler 1219 support routine, used to perform arithmetic, whose name is known 1220 specially by the compiler and was not mentioned in the C code being 1221 compiled. 1222 1223 The definition of `LIBRARY_VALUE' need not be concerned aggregate 1224 data types, because none of the library functions returns such 1225 types. */ 1226 1227 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RET_REGISTER) 1228 /* A C expression that is nonzero if REGNO is the number of a hard 1229 register in which the values of called function may come back. 1230 1231 A register whose use for returning values is limited to serving as 1232 the second of a pair (for a value of type `double', say) need not 1233 be recognized by this macro. So for most machines, this definition 1234 suffices: 1235 1236 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) 1237 1238 If the machine has register windows, so that the caller and the 1239 called function use different registers for the return value, this 1240 macro should recognize only the caller's register numbers. */ 1241 1242 #define RETURN_IN_MEMORY(TYPE) ((TYPE_MODE (TYPE) == BLKmode) \ 1243 ? int_size_in_bytes (TYPE) > 8 \ 1244 : 0) 1245 /* A C expression which can inhibit the returning of certain function 1246 values in registers, based on the type of value. A nonzero value 1247 says to return the function value in memory, just as large 1248 structures are always returned. Here TYPE will be a C expression 1249 of type `tree', representing the data type of the value. 1250 1251 Note that values of mode `BLKmode' must be explicitly handled by 1252 this macro. Also, the option `-fpcc-struct-return' takes effect 1253 regardless of this macro. On most systems, it is possible to 1254 leave the macro undefined; this causes a default definition to be 1255 used, whose value is the constant 1 for `BLKmode' values, and 0 1256 otherwise. 1257 1258 Do not use this macro to indicate that structures and unions 1259 should always be returned in memory. You should instead use 1260 `DEFAULT_PCC_STRUCT_RETURN' to indicate this. */ 1261 1262 #define DEFAULT_PCC_STRUCT_RETURN 0 1263 /* Define this macro to be 1 if all structure and union return values 1264 must be in memory. Since this results in slower code, this should 1265 be defined only if needed for compatibility with other compilers 1266 or with an ABI. If you define this macro to be 0, then the 1267 conventions used for structure and union return values are decided 1268 by the `RETURN_IN_MEMORY' macro. 1269 1270 If not defined, this defaults to the value 1. */ 1271 1272 #define STRUCT_VALUE 0 1273 /* If the structure value address is not passed in a register, define 1274 `STRUCT_VALUE' as an expression returning an RTX for the place 1275 where the address is passed. If it returns 0, the address is 1276 passed as an "invisible" first argument. */ 1277 1278 #define STRUCT_VALUE_INCOMING 0 1279 /* If the incoming location is not a register, then you should define 1280 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the 1281 called function should find the value. If it should find the 1282 value on the stack, define this to create a `mem' which refers to 1283 the frame pointer. A definition of 0 means that the address is 1284 passed as an "invisible" first argument. */ 1285 1286 #define EPILOGUE_USES(REGNO) 0 1287 /* Define this macro as a C expression that is nonzero for registers 1288 are used by the epilogue or the `return' pattern. The stack and 1289 frame pointer registers are already be assumed to be used as 1290 needed. */ 1291 1292 #define STRICT_ARGUMENT_NAMING 1 1293 /* Define this macro if the location where a function argument is 1294 passed depends on whether or not it is a named argument. 1295 1296 This macro controls how the NAMED argument to `FUNCTION_ARG' is 1297 set for varargs and stdarg functions. With this macro defined, 1298 the NAMED argument is always true for named arguments, and false 1299 for unnamed arguments. If this is not defined, but 1300 `SETUP_INCOMING_VARARGS' is defined, then all arguments are 1301 treated as named. Otherwise, all named arguments except the last 1302 are treated as named. */ 1303 1304 1305 #define HAVE_POST_INCREMENT 1 1306 /* Define this macro if the machine supports post-increment 1307 addressing. */ 1308 1309 #define HAVE_PRE_DECREMENT 1 1310 /* #define HAVE_PRE_INCREMENT 1311 #define HAVE_POST_DECREMENT */ 1312 /* Similar for other kinds of addressing. */ 1313 1314 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X) 1315 /* A C expression that is 1 if the RTX X is a constant which is a 1316 valid address. On most machines, this can be defined as 1317 `CONSTANT_P (X)', but a few machines are more restrictive in which 1318 constant addresses are supported. 1319 1320 `CONSTANT_P' accepts integer-values expressions whose values are 1321 not explicitly known, such as `symbol_ref', `label_ref', and 1322 `high' expressions and `const' arithmetic expressions, in addition 1323 to `const_int' and `const_double' expressions. */ 1324 1325 #define MAX_REGS_PER_ADDRESS 1 1326 /* A number, the maximum number of registers that can appear in a 1327 valid memory address. Note that it is up to you to specify a 1328 value equal to the maximum number that `GO_IF_LEGITIMATE_ADDRESS' 1329 would ever accept. */ 1330 1331 #ifdef REG_OK_STRICT 1332 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \ 1333 { \ 1334 if (legitimate_address_p (mode, operand, 1)) \ 1335 goto ADDR; \ 1336 } 1337 # else 1338 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \ 1339 { \ 1340 if (legitimate_address_p (mode, operand, 0)) \ 1341 goto ADDR; \ 1342 } 1343 #endif 1344 /* A C compound statement with a conditional `goto LABEL;' executed 1345 if X (an RTX) is a legitimate memory address on the target machine 1346 for a memory operand of mode MODE. */ 1347 1348 /* `REG_OK_FOR_BASE_P (X)' 1349 A C expression that is nonzero if X (assumed to be a `reg' RTX) is 1350 valid for use as a base register. For hard registers, it should 1351 always accept those which the hardware permits and reject the 1352 others. Whether the macro accepts or rejects pseudo registers 1353 must be controlled by `REG_OK_STRICT' as described above. This 1354 usually requires two variant definitions, of which `REG_OK_STRICT' 1355 controls the one actually used. */ 1356 1357 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \ 1358 (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X)) 1359 1360 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) 1361 1362 #ifdef REG_OK_STRICT 1363 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X) 1364 #else 1365 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X) 1366 #endif 1367 1368 /* A C expression that is just like `REG_OK_FOR_BASE_P', except that 1369 that expression may examine the mode of the memory reference in 1370 MODE. You should define this macro if the mode of the memory 1371 reference affects whether a register may be used as a base 1372 register. If you define this macro, the compiler will use it 1373 instead of `REG_OK_FOR_BASE_P'. */ 1374 #define REG_OK_FOR_INDEX_P(X) 0 1375 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is 1376 valid for use as an index register. 1377 1378 The difference between an index register and a base register is 1379 that the index register may be scaled. If an address involves the 1380 sum of two registers, neither one of them scaled, then either one 1381 may be labeled the "base" and the other the "index"; but whichever 1382 labeling is used must fit the machine's constraints of which 1383 registers may serve in each capacity. The compiler will try both 1384 labelings, looking for one that is valid, and will reload one or 1385 both registers only if neither labeling works. */ 1386 1387 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \ 1388 { \ 1389 (X) = legitimize_address (X, OLDX, MODE); \ 1390 if (memory_address_p (MODE, X)) \ 1391 goto WIN; \ 1392 } 1393 /* A C compound statement that attempts to replace X with a valid 1394 memory address for an operand of mode MODE. WIN will be a C 1395 statement label elsewhere in the code; the macro definition may use 1396 1397 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); 1398 1399 to avoid further processing if the address has become legitimate. 1400 1401 X will always be the result of a call to `break_out_memory_refs', 1402 and OLDX will be the operand that was given to that function to 1403 produce X. 1404 1405 The code generated by this macro should not alter the substructure 1406 of X. If it transforms X into a more legitimate form, it should 1407 assign X (which will always be a C variable) a new value. 1408 1409 It is not necessary for this macro to come up with a legitimate 1410 address. The compiler has standard ways of doing so in all cases. 1411 In fact, it is safe for this macro to do nothing. But often a 1412 machine-dependent strategy can generate better code. */ 1413 1414 #define XEXP_(X,Y) (X) 1415 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \ 1416 do { \ 1417 if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC)) \ 1418 { \ 1419 push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0), \ 1420 POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0, \ 1421 OPNUM, RELOAD_OTHER); \ 1422 goto WIN; \ 1423 } \ 1424 if (GET_CODE (X) == PLUS \ 1425 && REG_P (XEXP (X, 0)) \ 1426 && GET_CODE (XEXP (X, 1)) == CONST_INT \ 1427 && INTVAL (XEXP (X, 1)) >= 1) \ 1428 { \ 1429 int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE)); \ 1430 if (fit) \ 1431 { \ 1432 if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0) \ 1433 { \ 1434 int regno = REGNO (XEXP (X, 0)); \ 1435 rtx mem = make_memloc (X, regno); \ 1436 push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL, \ 1437 POINTER_REGS, Pmode, VOIDmode, 0, 0, \ 1438 1, ADDR_TYPE (TYPE)); \ 1439 push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL, \ 1440 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \ 1441 OPNUM, TYPE); \ 1442 goto WIN; \ 1443 } \ 1444 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \ 1445 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \ 1446 OPNUM, TYPE); \ 1447 goto WIN; \ 1448 } \ 1449 else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \ 1450 { \ 1451 push_reload (X, NULL_RTX, &X, NULL, \ 1452 POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \ 1453 OPNUM, TYPE); \ 1454 goto WIN; \ 1455 } \ 1456 } \ 1457 } while(0) 1458 /* A C compound statement that attempts to replace X, which is an 1459 address that needs reloading, with a valid memory address for an 1460 operand of mode MODE. WIN will be a C statement label elsewhere 1461 in the code. It is not necessary to define this macro, but it 1462 might be useful for performance reasons. 1463 1464 For example, on the i386, it is sometimes possible to use a single 1465 reload register instead of two by reloading a sum of two pseudo 1466 registers into a register. On the other hand, for number of RISC 1467 processors offsets are limited so that often an intermediate 1468 address needs to be generated in order to address a stack slot. 1469 By defining LEGITIMIZE_RELOAD_ADDRESS appropriately, the 1470 intermediate addresses generated for adjacent some stack slots can 1471 be made identical, and thus be shared. 1472 1473 *Note*: This macro should be used with caution. It is necessary 1474 to know something of how reload works in order to effectively use 1475 this, and it is quite easy to produce macros that build in too 1476 much knowledge of reload internals. 1477 1478 *Note*: This macro must be able to reload an address created by a 1479 previous invocation of this macro. If it fails to handle such 1480 addresses then the compiler may generate incorrect code or abort. 1481 1482 The macro definition should use `push_reload' to indicate parts 1483 that need reloading; OPNUM, TYPE and IND_LEVELS are usually 1484 suitable to be passed unaltered to `push_reload'. 1485 1486 The code generated by this macro must not alter the substructure of 1487 X. If it transforms X into a more legitimate form, it should 1488 assign X (which will always be a C variable) a new value. This 1489 also applies to parts that you change indirectly by calling 1490 `push_reload'. 1491 1492 The macro definition may use `strict_memory_address_p' to test if 1493 the address has become legitimate. 1494 1495 If you want to change only a part of X, one standard way of doing 1496 this is to use `copy_rtx'. Note, however, that is unshares only a 1497 single level of rtl. Thus, if the part to be changed is not at the 1498 top level, you'll need to replace first the top leve It is not 1499 necessary for this macro to come up with a legitimate address; 1500 but often a machine-dependent strategy can generate better code. */ 1501 1502 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ 1503 if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) \ 1504 goto LABEL 1505 /* A C statement or compound statement with a conditional `goto 1506 LABEL;' executed if memory address X (an RTX) can have different 1507 meanings depending on the machine mode of the memory reference it 1508 is used for or if the address is valid for some modes but not 1509 others. 1510 1511 Autoincrement and autodecrement addresses typically have 1512 mode-dependent effects because the amount of the increment or 1513 decrement is the size of the operand being addressed. Some 1514 machines have other mode-dependent addresses. Many RISC machines 1515 have no mode-dependent addresses. 1516 1517 You may assume that ADDR is a valid address for the machine. */ 1518 1519 #define LEGITIMATE_CONSTANT_P(X) 1 1520 /* A C expression that is nonzero if X is a legitimate constant for 1521 an immediate operand on the target machine. You can assume that X 1522 satisfies `CONSTANT_P', so you need not check this. In fact, `1' 1523 is a suitable definition for this macro on machines where anything 1524 `CONSTANT_P' is valid. */ 1525 1526 #define CONST_COSTS(x,CODE,OUTER_CODE) \ 1527 case CONST_INT: \ 1528 if (OUTER_CODE == PLUS \ 1529 || OUTER_CODE == IOR \ 1530 || OUTER_CODE == AND \ 1531 || OUTER_CODE == MINUS \ 1532 || OUTER_CODE == SET \ 1533 || INTVAL (x) == 0) \ 1534 return 2; \ 1535 if (OUTER_CODE == COMPARE \ 1536 && INTVAL (x) >= 0 \ 1537 && INTVAL (x) <= 255) \ 1538 return 2; \ 1539 case CONST: \ 1540 case LABEL_REF: \ 1541 case SYMBOL_REF: \ 1542 return 4; \ 1543 case CONST_DOUBLE: \ 1544 return 4; 1545 1546 /* A part of a C `switch' statement that describes the relative costs 1547 of constant RTL expressions. It must contain `case' labels for 1548 expression codes `const_int', `const', `symbol_ref', `label_ref' 1549 and `const_double'. Each case must ultimately reach a `return' 1550 statement to return the relative cost of the use of that kind of 1551 constant value in an expression. The cost may depend on the 1552 precise value of the constant, which is available for examination 1553 in X, and the rtx code of the expression in which it is contained, 1554 found in OUTER_CODE. 1555 1556 CODE is the expression code--redundant, since it can be obtained 1557 with `GET_CODE (X)'. */ 1558 1559 #define DEFAULT_RTX_COSTS(x, code, outer_code) \ 1560 { \ 1561 int cst = default_rtx_costs (x, code, outer_code); \ 1562 if (cst>0) \ 1563 return cst; \ 1564 else if (cst<0) \ 1565 total += -cst; \ 1566 break; \ 1567 } 1568 1569 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. 1570 This can be used, for example, to indicate how costly a multiply 1571 instruction is. In writing this macro, you can use the construct 1572 `COSTS_N_INSNS (N)' to specify a cost equal to N fast 1573 instructions. OUTER_CODE is the code of the expression in which X 1574 is contained. 1575 1576 This macro is optional; do not define it if the default cost 1577 assumptions are adequate for the target machine. */ 1578 1579 #define ADDRESS_COST(ADDRESS) avr_address_cost (ADDRESS) 1580 1581 /* An expression giving the cost of an addressing mode that contains 1582 ADDRESS. If not defined, the cost is computed from the ADDRESS 1583 expression and the `CONST_COSTS' values. 1584 1585 For most CISC machines, the default cost is a good approximation 1586 of the true cost of the addressing mode. However, on RISC 1587 machines, all instructions normally have the same length and 1588 execution time. Hence all addresses will have equal costs. 1589 1590 In cases where more than one form of an address is known, the form 1591 with the lowest cost will be used. If multiple forms have the 1592 same, lowest, cost, the one that is the most complex will be used. 1593 1594 For example, suppose an address that is equal to the sum of a 1595 register and a constant is used twice in the same basic block. 1596 When this macro is not defined, the address will be computed in a 1597 register and memory references will be indirect through that 1598 register. On machines where the cost of the addressing mode 1599 containing the sum is no higher than that of a simple indirect 1600 reference, this will produce an additional instruction and 1601 possibly require an additional register. Proper specification of 1602 this macro eliminates this overhead for such machines. 1603 1604 Similar use of this macro is made in strength reduction of loops. 1605 1606 ADDRESS need not be valid as an address. In such a case, the cost 1607 is not relevant and can be any value; invalid addresses need not be 1608 assigned a different cost. 1609 1610 On machines where an address involving more than one register is as 1611 cheap as an address computation involving only one register, 1612 defining `ADDRESS_COST' to reflect this can cause two registers to 1613 be live over a region of code where only one would have been if 1614 `ADDRESS_COST' were not defined in that manner. This effect should 1615 be considered in the definition of this macro. Equivalent costs 1616 should probably only be given to addresses with different numbers 1617 of registers on machines with lots of registers. 1618 1619 This macro will normally either not be defined or be defined as a 1620 constant. */ 1621 1622 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \ 1623 : (TO) == STACK_REG ? 12 \ 1624 : 2) 1625 /* A C expression for the cost of moving data from a register in class 1626 FROM to one in class TO. The classes are expressed using the 1627 enumeration values such as `GENERAL_REGS'. A value of 2 is the 1628 default; other values are interpreted relative to that. 1629 1630 It is not required that the cost always equal 2 when FROM is the 1631 same as TO; on some machines it is expensive to move between 1632 registers if they are not general registers. 1633 1634 If reload sees an insn consisting of a single `set' between two 1635 hard registers, and if `REGISTER_MOVE_COST' applied to their 1636 classes returns a value of 2, reload does not check to ensure that 1637 the constraints of the insn are met. Setting a cost of other than 1638 2 will allow reload to verify that the constraints are met. You 1639 should do this if the `movM' pattern's constraints do not allow 1640 such copying. */ 1641 1642 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 : \ 1643 (MODE)==HImode ? 4 : \ 1644 (MODE)==SImode ? 8 : \ 1645 (MODE)==SFmode ? 8 : 16) 1646 /* A C expression for the cost of moving data of mode M between a 1647 register and memory. A value of 4 is the default; this cost is 1648 relative to those in `REGISTER_MOVE_COST'. 1649 1650 If moving between registers and memory is more expensive than 1651 between two registers, you should define this macro to express the 1652 relative cost. */ 1653 1654 #define BRANCH_COST 0 1655 /* A C expression for the cost of a branch instruction. A value of 1 1656 is the default; other values are interpreted relative to that. 1657 1658 Here are additional macros which do not specify precise relative 1659 costs, but only that certain actions are more expensive than GCC would 1660 ordinarily expect. */ 1661 1662 #define SLOW_BYTE_ACCESS 0 1663 /* Define this macro as a C expression which is nonzero if accessing 1664 less than a word of memory (i.e. a `char' or a `short') is no 1665 faster than accessing a word of memory, i.e., if such access 1666 require more than one instruction or if there is no difference in 1667 cost between byte and (aligned) word loads. 1668 1669 When this macro is not defined, the compiler will access a field by 1670 finding the smallest containing object; when it is defined, a 1671 fullword load will be used if alignment permits. Unless bytes 1672 accesses are faster than word accesses, using word accesses is 1673 preferable since it may eliminate subsequent memory access if 1674 subsequent accesses occur to other fields in the same word of the 1675 structure, but to different bytes. 1676 1677 `SLOW_UNALIGNED_ACCESS' 1678 Define this macro to be the value 1 if unaligned accesses have a 1679 cost many times greater than aligned accesses, for example if they 1680 are emulated in a trap handler. 1681 1682 When this macro is nonzero, the compiler will act as if 1683 `STRICT_ALIGNMENT' were nonzero when generating code for block 1684 moves. This can cause significantly more instructions to be 1685 produced. Therefore, do not set this macro nonzero if unaligned 1686 accesses only add a cycle or two to the time for a memory access. 1687 1688 If the value of this macro is always zero, it need not be defined. 1689 1690 `DONT_REDUCE_ADDR' 1691 Define this macro to inhibit strength reduction of memory 1692 addresses. (On some machines, such strength reduction seems to do 1693 harm rather than good.) 1694 1695 `MOVE_RATIO' 1696 The number of scalar move insns which should be generated instead 1697 of a string move insn or a library call. Increasing the value 1698 will always make code faster, but eventually incurs high cost in 1699 increased code size. 1700 1701 If you don't define this, a reasonable default is used. */ 1702 1703 #define NO_FUNCTION_CSE 1704 /* Define this macro if it is as good or better to call a constant 1705 function address than to call an address kept in a register. */ 1706 1707 #define NO_RECURSIVE_FUNCTION_CSE 1708 /* Define this macro if it is as good or better for a function to call 1709 itself with an explicit address than to call an address kept in a 1710 register. */ 1711 1712 #define TEXT_SECTION_ASM_OP "\t.text" 1713 /* A C expression whose value is a string containing the assembler 1714 operation that should precede instructions and read-only data. 1715 Normally `"\t.text"' is right. */ 1716 1717 #define DATA_SECTION_ASM_OP "\t.data" 1718 /* A C expression whose value is a string containing the assembler 1719 operation to identify the following data as writable initialized 1720 data. Normally `"\t.data"' is right. */ 1721 1722 #define BSS_SECTION_ASM_OP "\t.section .bss" 1723 /* If defined, a C expression whose value is a string, including 1724 spacing, containing the assembler operation to identify the 1725 following data as uninitialized global data. If not defined, and 1726 neither `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 1727 uninitialized global data will be output in the data section if 1728 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 1729 used. */ 1730 1731 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections. 1732 There are no shared libraries on this target, and these sections are 1733 placed in the read-only program memory, so they are not writable. */ 1734 1735 #undef CTORS_SECTION_ASM_OP 1736 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits" 1737 1738 #undef DTORS_SECTION_ASM_OP 1739 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits" 1740 1741 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor 1742 /* If defined, a function that outputs assembler code to arrange to 1743 call the function referenced by SYMBOL at initialization time. */ 1744 1745 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor 1746 /* This is like `TARGET_ASM_CONSTRUCTOR' but used for termination 1747 functions rather than initialization functions. */ 1748 1749 #define EXTRA_SECTIONS in_progmem 1750 /* A list of names for sections other than the standard two, which are 1751 `in_text' and `in_data'. You need not define this macro on a 1752 system with no other sections (that GCC needs to use). */ 1753 1754 #define EXTRA_SECTION_FUNCTIONS \ 1755 \ 1756 void \ 1757 progmem_section () \ 1758 { \ 1759 if (in_section != in_progmem) \ 1760 { \ 1761 fprintf (asm_out_file, \ 1762 "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n", \ 1763 AVR_MEGA ? "a" : "ax"); \ 1764 /* Should already be aligned, this is just to be safe if it isn't. */ \ 1765 fprintf (asm_out_file, "\t.p2align 1\n"); \ 1766 in_section = in_progmem; \ 1767 } \ 1768 } 1769 /* `EXTRA_SECTION_FUNCTIONS' 1770 One or more functions to be defined in `varasm.c'. These 1771 functions should do jobs analogous to those of `text_section' and 1772 `data_section', for your additional sections. Do not define this 1773 macro if you do not define `EXTRA_SECTIONS'. */ 1774 1775 #define READONLY_DATA_SECTION data_section 1776 /* On most machines, read-only variables, constants, and jump tables 1777 are placed in the text section. If this is not the case on your 1778 machine, this macro should be defined to be the name of a function 1779 (either `data_section' or a function defined in `EXTRA_SECTIONS') 1780 that switches to the section to be used for read-only items. 1781 1782 If these items should be placed in the text section, this macro 1783 should not be defined. */ 1784 1785 #define JUMP_TABLES_IN_TEXT_SECTION 0 1786 /* Define this macro if jump tables (for `tablejump' insns) should be 1787 output in the text section, along with the assembler instructions. 1788 Otherwise, the readonly data section is used. 1789 1790 This macro is irrelevant if there is no separate readonly data 1791 section. */ 1792 1793 #define ASM_FILE_START(STREAM) asm_file_start (STREAM) 1794 /* A C expression which outputs to the stdio stream STREAM some 1795 appropriate text to go at the start of an assembler file. 1796 1797 Normally this macro is defined to output a line containing 1798 `#NO_APP', which is a comment that has no effect on most 1799 assemblers but tells the GNU assembler that it can save time by not 1800 checking for certain assembler constructs. 1801 1802 On systems that use SDB, it is necessary to output certain 1803 commands; see `attasm.h'. */ 1804 1805 #define ASM_FILE_END(STREAM) asm_file_end (STREAM) 1806 /* A C expression which outputs to the stdio stream STREAM some 1807 appropriate text to go at the end of an assembler file. 1808 1809 If this macro is not defined, the default is to output nothing 1810 special at the end of the file. Most systems don't require any 1811 definition. 1812 1813 On systems that use SDB, it is necessary to output certain 1814 commands; see `attasm.h'. */ 1815 1816 #define ASM_COMMENT_START " ; " 1817 /* A C string constant describing how to begin a comment in the target 1818 assembler language. The compiler assumes that the comment will 1819 end at the end of the line. */ 1820 1821 #define ASM_APP_ON "/* #APP */\n" 1822 /* A C string constant for text to be output before each `asm' 1823 statement or group of consecutive ones. Normally this is 1824 `"#APP"', which is a comment that has no effect on most assemblers 1825 but tells the GNU assembler that it must check the lines that 1826 follow for all valid assembler constructs. */ 1827 1828 #define ASM_APP_OFF "/* #NOAPP */\n" 1829 /* A C string constant for text to be output after each `asm' 1830 statement or group of consecutive ones. Normally this is 1831 `"#NO_APP"', which tells the GNU assembler to resume making the 1832 time-saving assumptions that are valid for ordinary compiler 1833 output. */ 1834 1835 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) fprintf (STREAM,"/* line: %d */\n",LINE) 1836 /* A C statement to output DBX or SDB debugging information before 1837 code for line number LINE of the current source file to the stdio 1838 stream STREAM. 1839 1840 This macro need not be defined if the standard form of debugging 1841 information for the debugger in use is appropriate. */ 1842 1843 /* Switch into a generic section. */ 1844 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section 1845 1846 #define OBJC_PROLOGUE {} 1847 /* A C statement to output any assembler statements which are 1848 required to precede any Objective-C object definitions or message 1849 sending. The statement is executed only when compiling an 1850 Objective-C program. */ 1851 1852 1853 #define ASM_OUTPUT_ASCII(FILE, P, SIZE) gas_output_ascii (FILE,P,SIZE) 1854 /* `ASM_OUTPUT_ASCII (STREAM, PTR, LEN)' 1855 output_ascii (FILE, P, SIZE) 1856 A C statement to output to the stdio stream STREAM an assembler 1857 instruction to assemble a string constant containing the LEN bytes 1858 at PTR. PTR will be a C expression of type `char *' and LEN a C 1859 expression of type `int'. 1860 1861 If the assembler has a `.ascii' pseudo-op as found in the Berkeley 1862 Unix assembler, do not define the macro `ASM_OUTPUT_ASCII'. */ 1863 1864 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n' \ 1865 || ((C) == '$')) 1866 /* Define this macro as a C expression which is nonzero if C is used 1867 as a logical line separator by the assembler. 1868 1869 If you do not define this macro, the default is that only the 1870 character `;' is treated as a logical line separator. */ 1871 1872 /* These macros are provided by `real.h' for writing the definitions of 1873 `ASM_OUTPUT_DOUBLE' and the like: */ 1874 1875 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \ 1876 do { \ 1877 fputs ("\t.comm ", (STREAM)); \ 1878 assemble_name ((STREAM), (NAME)); \ 1879 fprintf ((STREAM), ",%d,1\n", (SIZE)); \ 1880 } while (0) 1881 /* A C statement (sans semicolon) to output to the stdio stream 1882 STREAM the assembler definition of a common-label named NAME whose 1883 size is SIZE bytes. The variable ROUNDED is the size rounded up 1884 to whatever alignment the caller wants. 1885 1886 Use the expression `assemble_name (STREAM, NAME)' to output the 1887 name itself; before and after that, output the additional 1888 assembler syntax for defining the name, and a newline. 1889 1890 This macro controls how the assembler definitions of uninitialized 1891 common global variables are output. */ 1892 1893 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED) \ 1894 asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED)) 1895 /* A C statement (sans semicolon) to output to the stdio stream 1896 STREAM the assembler definition of uninitialized global DECL named 1897 NAME whose size is SIZE bytes. The variable ROUNDED is the size 1898 rounded up to whatever alignment the caller wants. */ 1899 1900 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \ 1901 do { \ 1902 fputs ("\t.lcomm ", (STREAM)); \ 1903 assemble_name ((STREAM), (NAME)); \ 1904 fprintf ((STREAM), ",%d\n", (SIZE)); \ 1905 } while (0) 1906 /* A C statement (sans semicolon) to output to the stdio stream 1907 STREAM the assembler definition of a local-common-label named NAME 1908 whose size is SIZE bytes. The variable ROUNDED is the size 1909 rounded up to whatever alignment the caller wants. 1910 1911 Use the expression `assemble_name (STREAM, NAME)' to output the 1912 name itself; before and after that, output the additional 1913 assembler syntax for defining the name, and a newline. 1914 1915 This macro controls how the assembler definitions of uninitialized 1916 static variables are output. */ 1917 1918 #undef TYPE_ASM_OP 1919 #undef SIZE_ASM_OP 1920 #undef WEAK_ASM_OP 1921 #define TYPE_ASM_OP "\t.type\t" 1922 #define SIZE_ASM_OP "\t.size\t" 1923 #define WEAK_ASM_OP "\t.weak\t" 1924 /* Define the strings used for the special svr4 .type and .size directives. 1925 These strings generally do not vary from one system running svr4 to 1926 another, but if a given system (e.g. m88k running svr) needs to use 1927 different pseudo-op names for these, they may be overridden in the 1928 file which includes this one. */ 1929 1930 1931 #undef TYPE_OPERAND_FMT 1932 #define TYPE_OPERAND_FMT "@%s" 1933 /* The following macro defines the format used to output the second 1934 operand of the .type assembler directive. Different svr4 assemblers 1935 expect various different forms for this operand. The one given here 1936 is just a default. You may need to override it in your machine- 1937 specific tm.h file (depending upon the particulars of your assembler). */ 1938 1939 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 1940 do { \ 1941 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ 1942 ASM_OUTPUT_LABEL (FILE, NAME); \ 1943 } while (0) 1944 1945 /* A C statement (sans semicolon) to output to the stdio stream 1946 STREAM any text necessary for declaring the name NAME of a 1947 function which is being defined. This macro is responsible for 1948 outputting the label definition (perhaps using 1949 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' 1950 tree node representing the function. 1951 1952 If this macro is not defined, then the function name is defined in 1953 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */ 1954 1955 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 1956 do { \ 1957 if (!flag_inhibit_size_directive) \ 1958 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 1959 } while (0) 1960 /* A C statement (sans semicolon) to output to the stdio stream 1961 STREAM any text necessary for declaring the size of a function 1962 which is being defined. The argument NAME is the name of the 1963 function. The argument DECL is the `FUNCTION_DECL' tree node 1964 representing the function. 1965 1966 If this macro is not defined, then the function size is not 1967 defined. */ 1968 1969 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ 1970 do { \ 1971 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 1972 size_directive_output = 0; \ 1973 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \ 1974 { \ 1975 size_directive_output = 1; \ 1976 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, \ 1977 int_size_in_bytes (TREE_TYPE (DECL))); \ 1978 } \ 1979 ASM_OUTPUT_LABEL(FILE, NAME); \ 1980 } while (0) 1981 /* A C statement (sans semicolon) to output to the stdio stream 1982 STREAM any text necessary for declaring the name NAME of an 1983 initialized variable which is being defined. This macro must 1984 output the label definition (perhaps using `ASM_OUTPUT_LABEL'). 1985 The argument DECL is the `VAR_DECL' tree node representing the 1986 variable. 1987 1988 If this macro is not defined, then the variable name is defined in 1989 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */ 1990 1991 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ 1992 do { \ 1993 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ 1994 HOST_WIDE_INT size; \ 1995 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ 1996 && ! AT_END && TOP_LEVEL \ 1997 && DECL_INITIAL (DECL) == error_mark_node \ 1998 && !size_directive_output) \ 1999 { \ 2000 size_directive_output = 1; \ 2001 size = int_size_in_bytes (TREE_TYPE (DECL)); \ 2002 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \ 2003 } \ 2004 } while (0) 2005 2006 /* A C statement (sans semicolon) to finish up declaring a variable 2007 name once the compiler has processed its initializer fully and 2008 thus has had a chance to determine the size of an array when 2009 controlled by an initializer. This is used on systems where it's 2010 necessary to declare something about the size of the object. 2011 2012 If you don't define this macro, that is equivalent to defining it 2013 to do nothing. */ 2014 2015 2016 #define ESCAPES \ 2017 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 2018 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 2019 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\ 2020 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\ 2021 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 2022 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 2023 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 2024 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1" 2025 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and 2026 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table 2027 corresponds to a particular byte value [0..255]. For any 2028 given byte value, if the value in the corresponding table 2029 position is zero, the given character can be output directly. 2030 If the table value is 1, the byte must be output as a \ooo 2031 octal escape. If the tables value is anything else, then the 2032 byte value should be output as a \ followed by the value 2033 in the table. Note that we can use standard UN*X escape 2034 sequences for many control characters, but we don't use 2035 \a to represent BEL because some svr4 assemblers (e.g. on 2036 the i386) don't know about that. Also, we don't use \v 2037 since some versions of gas, such as 2.2 did not accept it. */ 2038 2039 #define STRING_LIMIT ((unsigned) 64) 2040 #define STRING_ASM_OP "\t.string\t" 2041 /* Some svr4 assemblers have a limit on the number of characters which 2042 can appear in the operand of a .string directive. If your assembler 2043 has such a limitation, you should define STRING_LIMIT to reflect that 2044 limit. Note that at least some svr4 assemblers have a limit on the 2045 actual number of bytes in the double-quoted string, and that they 2046 count each character in an escape sequence as one byte. Thus, an 2047 escape sequence like \377 would count as four bytes. 2048 2049 If your target assembler doesn't support the .string directive, you 2050 should define this to zero. */ 2051 2052 /* Globalizing directive for a label. */ 2053 #define GLOBAL_ASM_OP ".global\t" 2054 2055 #define ASM_WEAKEN_LABEL(FILE, NAME) \ 2056 do \ 2057 { \ 2058 fputs ("\t.weak\t", (FILE)); \ 2059 assemble_name ((FILE), (NAME)); \ 2060 fputc ('\n', (FILE)); \ 2061 } \ 2062 while (0) 2063 2064 /* A C statement (sans semicolon) to output to the stdio stream 2065 STREAM some commands that will make the label NAME weak; that is, 2066 available for reference from other files but only used if no other 2067 definition is available. Use the expression `assemble_name 2068 (STREAM, NAME)' to output the name itself; before and after that, 2069 output the additional assembler syntax for making that name weak, 2070 and a newline. 2071 2072 If you don't define this macro, GNU CC will not support weak 2073 symbols and you should not define the `SUPPORTS_WEAK' macro. 2074 */ 2075 2076 #define SUPPORTS_WEAK 1 2077 /* A C expression which evaluates to true if the target supports weak 2078 symbols. 2079 2080 If you don't define this macro, `defaults.h' provides a default 2081 definition. If `ASM_WEAKEN_LABEL' is defined, the default 2082 definition is `1'; otherwise, it is `0'. Define this macro if you 2083 want to control weak symbol support with a compiler flag such as 2084 `-melf'. 2085 2086 `MAKE_DECL_ONE_ONLY' 2087 A C statement (sans semicolon) to mark DECL to be emitted as a 2088 public symbol such that extra copies in multiple translation units 2089 will be discarded by the linker. Define this macro if your object 2090 file format provides support for this concept, such as the `COMDAT' 2091 section flags in the Microsoft Windows PE/COFF format, and this 2092 support requires changes to DECL, such as putting it in a separate 2093 section. 2094 2095 `SUPPORTS_WEAK' 2096 A C expression which evaluates to true if the target supports 2097 one-only semantics. 2098 2099 If you don't define this macro, `varasm.c' provides a default 2100 definition. If `MAKE_DECL_ONE_ONLY' is defined, the default 2101 definition is `1'; otherwise, it is `0'. Define this macro if you 2102 want to control weak symbol support with a compiler flag, or if 2103 setting the `DECL_ONE_ONLY' flag is enough to mark a declaration to 2104 be emitted as one-only. */ 2105 2106 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \ 2107 fprintf(STREAM, ".%s%d:\n", PREFIX, NUM) 2108 /* A C statement to output to the stdio stream STREAM a label whose 2109 name is made from the string PREFIX and the number NUM. 2110 2111 It is absolutely essential that these labels be distinct from the 2112 labels used for user-level functions and variables. Otherwise, 2113 certain programs will have name conflicts with internal labels. 2114 2115 It is desirable to exclude internal labels from the symbol table 2116 of the object file. Most assemblers have a naming convention for 2117 labels that should be excluded; on many systems, the letter `L' at 2118 the beginning of a label has this effect. You should find out what 2119 convention your system uses, and follow it. 2120 2121 The usual definition of this macro is as follows: 2122 2123 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM) */ 2124 2125 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \ 2126 sprintf (STRING, "*.%s%d", PREFIX, NUM) 2127 /* A C statement to store into the string STRING a label whose name 2128 is made from the string PREFIX and the number NUM. 2129 2130 This string, when output subsequently by `assemble_name', should 2131 produce the output that `ASM_OUTPUT_INTERNAL_LABEL' would produce 2132 with the same PREFIX and NUM. 2133 2134 If the string begins with `*', then `assemble_name' will output 2135 the rest of the string unchanged. It is often convenient for 2136 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the 2137 string doesn't start with `*', then `ASM_OUTPUT_LABELREF' gets to 2138 output the string, and may change it. (Of course, 2139 `ASM_OUTPUT_LABELREF' is also part of your machine description, so 2140 you should know what it does on your machine.) */ 2141 2142 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ 2143 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \ 2144 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO))) 2145 2146 /* A C expression to assign to OUTVAR (which is a variable of type 2147 `char *') a newly allocated string made from the string NAME and 2148 the number NUMBER, with some suitable punctuation added. Use 2149 `alloca' to get space for the string. 2150 2151 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to 2152 produce an assembler label for an internal static variable whose 2153 name is NAME. Therefore, the string must be such as to result in 2154 valid assembler code. The argument NUMBER is different each time 2155 this macro is executed; it prevents conflicts between 2156 similarly-named internal static variables in different scopes. 2157 2158 Ideally this string should not be a valid C identifier, to prevent 2159 any conflict with the user's own symbols. Most assemblers allow 2160 periods or percent signs in assembler symbols; putting at least 2161 one of these between the name and the number will suffice. */ 2162 2163 /* `ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE)' 2164 A C statement to output to the stdio stream STREAM assembler code 2165 which defines (equates) the weak symbol NAME to have the value 2166 VALUE. 2167 2168 Define this macro if the target only supports weak aliases; define 2169 ASM_OUTPUT_DEF instead if possible. */ 2170 2171 #define HAS_INIT_SECTION 1 2172 /* If defined, `main' will not call `__main' as described above. 2173 This macro should be defined for systems that control the contents 2174 of the init section on a symbol-by-symbol basis, such as OSF/1, 2175 and should not be defined explicitly for systems that support 2176 `INIT_SECTION_ASM_OP'. */ 2177 2178 #define REGISTER_NAMES { \ 2179 "r0","r1","r2","r3","r4","r5","r6","r7", \ 2180 "r8","r9","r10","r11","r12","r13","r14","r15", \ 2181 "r16","r17","r18","r19","r20","r21","r22","r23", \ 2182 "r24","r25","r26","r27","r28","r29","r30","r31", \ 2183 "__SPL__","__SPH__","argL","argH"} 2184 /* A C initializer containing the assembler's names for the machine 2185 registers, each one as a C string constant. This is what 2186 translates register numbers in the compiler into assembler 2187 language. */ 2188 2189 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop) 2190 /* If defined, a C statement to be executed just prior to the output 2191 of assembler code for INSN, to modify the extracted operands so 2192 they will be output differently. 2193 2194 Here the argument OPVEC is the vector containing the operands 2195 extracted from INSN, and NOPERANDS is the number of elements of 2196 the vector which contain meaningful data for this insn. The 2197 contents of this vector are what will be used to convert the insn 2198 template into assembler code, so you can change the assembler 2199 output by changing the contents of the vector. 2200 2201 This macro is useful when various assembler syntaxes share a single 2202 file of instruction patterns; by defining this macro differently, 2203 you can cause a large class of instructions to be output 2204 differently (such as with rearranged operands). Naturally, 2205 variations in assembler syntax affecting individual insn patterns 2206 ought to be handled by writing conditional output routines in 2207 those patterns. 2208 2209 If this macro is not defined, it is equivalent to a null statement. */ 2210 2211 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE) 2212 /* A C compound statement to output to stdio stream STREAM the 2213 assembler syntax for an instruction operand X. X is an RTL 2214 expression. 2215 2216 CODE is a value that can be used to specify one of several ways of 2217 printing the operand. It is used when identical operands must be 2218 printed differently depending on the context. CODE comes from the 2219 `%' specification that was used to request printing of the 2220 operand. If the specification was just `%DIGIT' then CODE is 0; 2221 if the specification was `%LTR DIGIT' then CODE is the ASCII code 2222 for LTR. 2223 2224 If X is a register, this macro should print the register's name. 2225 The names can be found in an array `reg_names' whose type is `char 2226 *[]'. `reg_names' is initialized from `REGISTER_NAMES'. 2227 2228 When the machine description has a specification `%PUNCT' (a `%' 2229 followed by a punctuation character), this macro is called with a 2230 null pointer for X and the punctuation character for CODE. */ 2231 2232 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~') 2233 /* A C expression which evaluates to true if CODE is a valid 2234 punctuation character for use in the `PRINT_OPERAND' macro. If 2235 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no 2236 punctuation characters (except for the standard one, `%') are used 2237 in this way. */ 2238 2239 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X) 2240 /* A C compound statement to output to stdio stream STREAM the 2241 assembler syntax for an instruction operand that is a memory 2242 reference whose address is X. X is an RTL expression. */ 2243 2244 #define USER_LABEL_PREFIX "" 2245 /* `LOCAL_LABEL_PREFIX' 2246 `REGISTER_PREFIX' 2247 `IMMEDIATE_PREFIX' 2248 If defined, C string expressions to be used for the `%R', `%L', 2249 `%U', and `%I' options of `asm_fprintf' (see `final.c'). These 2250 are useful when a single `md' file must support multiple assembler 2251 formats. In that case, the various `tm.h' files can define these 2252 macros differently. */ 2253 2254 #define ASSEMBLER_DIALECT AVR_ENHANCED 2255 /* If your target supports multiple dialects of assembler language 2256 (such as different opcodes), define this macro as a C expression 2257 that gives the numeric index of the assembler language dialect to 2258 use, with zero as the first variant. 2259 2260 If this macro is defined, you may use constructs of the form 2261 `{option0|option1|option2...}' in the output templates of patterns 2262 (*note Output Template::.) or in the first argument of 2263 `asm_fprintf'. This construct outputs `option0', `option1' or 2264 `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero, one 2265 or two, etc. Any special characters within these strings retain 2266 their usual meaning. 2267 2268 If you do not define this macro, the characters `{', `|' and `}' 2269 do not have any special meaning when used in templates or operands 2270 to `asm_fprintf'. 2271 2272 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX', 2273 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the 2274 variations in assembler language syntax with that mechanism. 2275 Define `ASSEMBLER_DIALECT' and use the `{option0|option1}' syntax 2276 if the syntax variant are larger and involve such things as 2277 different opcodes or operand order. */ 2278 2279 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \ 2280 { \ 2281 if (REGNO > 31) \ 2282 abort (); \ 2283 fprintf (STREAM, "\tpush\tr%d", REGNO); \ 2284 } 2285 /* A C expression to output to STREAM some assembler code which will 2286 push hard register number REGNO onto the stack. The code need not 2287 be optimal, since this macro is used only when profiling. */ 2288 2289 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \ 2290 { \ 2291 if (REGNO > 31) \ 2292 abort (); \ 2293 fprintf (STREAM, "\tpop\tr%d", REGNO); \ 2294 } 2295 /* A C expression to output to STREAM some assembler code which will 2296 pop hard register number REGNO off of the stack. The code need 2297 not be optimal, since this macro is used only when profiling. */ 2298 2299 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ 2300 avr_output_addr_vec_elt(STREAM, VALUE) 2301 /* This macro should be provided on machines where the addresses in a 2302 dispatch table are absolute. 2303 2304 The definition should be a C statement to output to the stdio 2305 stream STREAM an assembler pseudo-instruction to generate a 2306 reference to a label. VALUE is the number of an internal label 2307 whose definition is output using `ASM_OUTPUT_INTERNAL_LABEL'. For 2308 example, 2309 2310 fprintf (STREAM, "\t.word L%d\n", VALUE) */ 2311 2312 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \ 2313 progmem_section (), ASM_OUTPUT_INTERNAL_LABEL (STREAM, PREFIX, NUM) 2314 2315 /* `ASM_OUTPUT_CASE_LABEL (STREAM, PREFIX, NUM, TABLE)' 2316 Define this if the label before a jump-table needs to be output 2317 specially. The first three arguments are the same as for 2318 `ASM_OUTPUT_INTERNAL_LABEL'; the fourth argument is the jump-table 2319 which follows (a `jump_insn' containing an `addr_vec' or 2320 `addr_diff_vec'). 2321 2322 This feature is used on system V to output a `swbeg' statement for 2323 the table. 2324 2325 If this macro is not defined, these labels are output with 2326 `ASM_OUTPUT_INTERNAL_LABEL'. */ 2327 2328 /* `ASM_OUTPUT_CASE_END (STREAM, NUM, TABLE)' 2329 Define this if something special must be output at the end of a 2330 jump-table. The definition should be a C statement to be executed 2331 after the assembler code for the table is written. It should write 2332 the appropriate code to stdio stream STREAM. The argument TABLE 2333 is the jump-table insn, and NUM is the label-number of the 2334 preceding label. 2335 2336 If this macro is not defined, nothing special is output at the end 2337 of the jump-table. */ 2338 2339 #define ASM_OUTPUT_SKIP(STREAM, N) \ 2340 fprintf (STREAM, "\t.skip %d,0\n", N) 2341 /* A C statement to output to the stdio stream STREAM an assembler 2342 instruction to advance the location counter by NBYTES bytes. 2343 Those bytes should be zero when loaded. NBYTES will be a C 2344 expression of type `int'. */ 2345 2346 #define ASM_OUTPUT_ALIGN(STREAM, POWER) 2347 /* A C statement to output to the stdio stream STREAM an assembler 2348 command to advance the location counter to a multiple of 2 to the 2349 POWER bytes. POWER will be a C expression of type `int'. */ 2350 2351 #define CASE_VECTOR_MODE HImode 2352 /* An alias for a machine mode name. This is the machine mode that 2353 elements of a jump-table should have. */ 2354 2355 extern int avr_case_values_threshold; 2356 2357 #define CASE_VALUES_THRESHOLD avr_case_values_threshold 2358 /* `CASE_VALUES_THRESHOLD' 2359 Define this to be the smallest number of different values for 2360 which it is best to use a jump-table instead of a tree of 2361 conditional branches. The default is four for machines with a 2362 `casesi' instruction and five otherwise. This is best for most 2363 machines. */ 2364 2365 #undef WORD_REGISTER_OPERATIONS 2366 /* Define this macro if operations between registers with integral 2367 mode smaller than a word are always performed on the entire 2368 register. Most RISC machines have this property and most CISC 2369 machines do not. */ 2370 2371 #define MOVE_MAX 4 2372 /* The maximum number of bytes that a single instruction can move 2373 quickly between memory and registers or between two memory 2374 locations. */ 2375 2376 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 2377 /* A C expression which is nonzero if on this machine it is safe to 2378 "convert" an integer of INPREC bits to one of OUTPREC bits (where 2379 OUTPREC is smaller than INPREC) by merely operating on it as if it 2380 had only OUTPREC bits. 2381 2382 On many machines, this expression can be 1. 2383 2384 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for 2385 modes for which `MODES_TIEABLE_P' is 0, suboptimal code can result. 2386 If this is the case, making `TRULY_NOOP_TRUNCATION' return 0 in 2387 such cases may improve things. */ 2388 2389 #define Pmode HImode 2390 /* An alias for the machine mode for pointers. On most machines, 2391 define this to be the integer mode corresponding to the width of a 2392 hardware pointer; `SImode' on 32-bit machine or `DImode' on 64-bit 2393 machines. On some machines you must define this to be one of the 2394 partial integer modes, such as `PSImode'. 2395 2396 The width of `Pmode' must be at least as large as the value of 2397 `POINTER_SIZE'. If it is not equal, you must define the macro 2398 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to 2399 `Pmode'. */ 2400 2401 #define FUNCTION_MODE HImode 2402 /* An alias for the machine mode used for memory references to 2403 functions being called, in `call' RTL expressions. On most 2404 machines this should be `QImode'. */ 2405 /* 1 3 */ 2406 #define INTEGRATE_THRESHOLD(DECL) (1 + (3 * list_length (DECL_ARGUMENTS (DECL)) / 2)) 2407 2408 /* A C expression for the maximum number of instructions above which 2409 the function DECL should not be inlined. DECL is a 2410 `FUNCTION_DECL' node. 2411 2412 The default definition of this macro is 64 plus 8 times the number 2413 of arguments that the function accepts. Some people think a larger 2414 threshold should be used on RISC machines. */ 2415 2416 #define DOLLARS_IN_IDENTIFIERS 0 2417 /* Define this macro to control use of the character `$' in identifier 2418 names. 0 means `$' is not allowed by default; 1 means it is 2419 allowed. 1 is the default; there is no need to define this macro 2420 in that case. This macro controls the compiler proper; it does 2421 not affect the preprocessor. */ 2422 2423 #define NO_DOLLAR_IN_LABEL 1 2424 /* Define this macro if the assembler does not accept the character 2425 `$' in label names. By default constructors and destructors in 2426 G++ have `$' in the identifiers. If this macro is defined, `.' is 2427 used instead. */ 2428 2429 #define MACHINE_DEPENDENT_REORG(INSN) machine_dependent_reorg (INSN) 2430 /* In rare cases, correct code generation requires extra machine 2431 dependent processing between the second jump optimization pass and 2432 delayed branch scheduling. On those machines, define this macro 2433 as a C statement to act on the code starting at INSN. */ 2434 2435 #define GIV_SORT_CRITERION(X, Y) \ 2436 if (GET_CODE ((X)->add_val) == CONST_INT \ 2437 && GET_CODE ((Y)->add_val) == CONST_INT) \ 2438 return INTVAL ((X)->add_val) - INTVAL ((Y)->add_val); 2439 2440 /* `GIV_SORT_CRITERION(GIV1, GIV2)' 2441 In some cases, the strength reduction optimization pass can 2442 produce better code if this is defined. This macro controls the 2443 order that induction variables are combined. This macro is 2444 particularly useful if the target has limited addressing modes. 2445 For instance, the SH target has only positive offsets in 2446 addresses. Thus sorting to put the smallest address first allows 2447 the most combinations to be found. */ 2448 2449 #define TRAMPOLINE_TEMPLATE(FILE) \ 2450 internal_error ("trampolines not supported") 2451 2452 /* Length in units of the trampoline for entering a nested function. */ 2453 2454 #define TRAMPOLINE_SIZE 4 2455 2456 /* Emit RTL insns to initialize the variable parts of a trampoline. 2457 FNADDR is an RTX for the address of the function's pure code. 2458 CXT is an RTX for the static chain value for the function. */ 2459 2460 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ 2461 { \ 2462 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 2)), CXT); \ 2463 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 6)), FNADDR); \ 2464 } 2465 /* Store in cc_status the expressions 2466 that the condition codes will describe 2467 after execution of an instruction whose pattern is EXP. 2468 Do not alter them if the instruction would not alter the cc's. */ 2469 2470 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN) 2471 2472 /* The add insns don't set overflow in a usable way. */ 2473 #define CC_OVERFLOW_UNUSABLE 01000 2474 /* The mov,and,or,xor insns don't set carry. That's ok though as the 2475 Z bit is all we need when doing unsigned comparisons on the result of 2476 these insns (since they're always with 0). However, conditions.h has 2477 CC_NO_OVERFLOW defined for this purpose. Rename it to something more 2478 understandable. */ 2479 #define CC_NO_CARRY CC_NO_OVERFLOW 2480 2481 2482 /* Output assembler code to FILE to increment profiler label # LABELNO 2483 for profiling a function entry. */ 2484 2485 #define FUNCTION_PROFILER(FILE, LABELNO) \ 2486 fprintf (FILE, "/* profiler %d */", (LABELNO)) 2487 2488 /* `FIRST_INSN_ADDRESS' 2489 When the `length' insn attribute is used, this macro specifies the 2490 value to be assigned to the address of the first insn in a 2491 function. If not specified, 0 is used. */ 2492 2493 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\ 2494 adjust_insn_length (INSN, LENGTH)) 2495 /* If defined, modifies the length assigned to instruction INSN as a 2496 function of the context in which it is used. LENGTH is an lvalue 2497 that contains the initially computed length of the insn and should 2498 be updated with the correct length of the insn. If updating is 2499 required, INSN must not be a varying-length insn. 2500 2501 This macro will normally not be required. A case in which it is 2502 required is the ROMP. On this machine, the size of an `addr_vec' 2503 insn must be increased by two to compensate for the fact that 2504 alignment may be required. */ 2505 2506 #define TARGET_MEM_FUNCTIONS 2507 /* Define this macro if GNU CC should generate calls to the System V 2508 (and ANSI C) library functions `memcpy' and `memset' rather than 2509 the BSD functions `bcopy' and `bzero'. */ 2510 2511 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}" 2512 2513 /* A C string constant that tells the GNU CC driver program options to 2514 pass to CPP. It can also specify how to translate options you 2515 give to GNU CC into options for GNU CC to pass to the CPP. 2516 2517 Do not define this macro if it does not need to do anything. */ 2518 2519 #define CC1_SPEC "%{profile:-p}" 2520 /* A C string constant that tells the GNU CC driver program options to 2521 pass to `cc1'. It can also specify how to translate options you 2522 give to GNU CC into options for GNU CC to pass to the `cc1'. 2523 2524 Do not define this macro if it does not need to do anything. */ 2525 2526 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \ 2527 %{!fenforce-eh-specs:-fno-enforce-eh-specs} \ 2528 %{!fexceptions:-fno-exceptions}" 2529 /* A C string constant that tells the GNU CC drvier program options to 2530 pass to `cc1plus'. */ 2531 2532 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}" 2533 /* A C string constant that tells the GNU CC driver program options to 2534 pass to the assembler. It can also specify how to translate 2535 options you give to GNU CC into options for GNU CC to pass to the 2536 assembler. See the file `sun3.h' for an example of this. 2537 2538 Do not define this macro if it does not need to do anything. */ 2539 2540 #define ASM_FINAL_SPEC "" 2541 /* A C string constant that tells the GNU CC driver program how to 2542 run any programs which cleanup after the normal assembler. 2543 Normally, this is not needed. See the file `mips.h' for an 2544 example of this. 2545 2546 Do not define this macro if it does not need to do anything. */ 2547 2548 #define LINK_SPEC " %{!mmcu*:-m avr2}\ 2549 %{mmcu=at90s1200|mmcu=attiny1*|mmcu=attiny28:-m avr1} \ 2550 %{mmcu=attiny22|mmcu=attiny26|mmcu=at90s2*|mmcu=at90s4*|mmcu=at90s8*|mmcu=at90c8*|mmcu=at86rf401:-m avr2}\ 2551 %{mmcu=atmega103|mmcu=atmega603|mmcu=at43*|mmcu=at76*:-m avr3}\ 2552 %{mmcu=atmega8*:-m avr4}\ 2553 %{mmcu=atmega16*|mmcu=atmega32*|mmcu=atmega64|mmcu=atmega128|mmcu=at94k:-m avr5}\ 2554 %{mmcu=atmega64|mmcu=atmega128|mmcu=atmega162|mmcu=atmega169: -Tdata 0x800100} " 2555 2556 /* A C string constant that tells the GNU CC driver program options to 2557 pass to the linker. It can also specify how to translate options 2558 you give to GNU CC into options for GNU CC to pass to the linker. 2559 2560 Do not define this macro if it does not need to do anything. */ 2561 2562 #define LIB_SPEC \ 2563 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lc }}}" 2564 /* Another C string constant used much like `LINK_SPEC'. The 2565 difference between the two is that `LIB_SPEC' is used at the end 2566 of the command given to the linker. 2567 2568 If this macro is not defined, a default is provided that loads the 2569 standard C library from the usual place. See `gcc.c'. */ 2570 2571 #define LIBSTDCXX "-lgcc" 2572 /* No libstdc++ for now. Empty string doesn't work. */ 2573 2574 #define LIBGCC_SPEC \ 2575 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lgcc }}}" 2576 /* Another C string constant that tells the GNU CC driver program how 2577 and when to place a reference to `libgcc.a' into the linker 2578 command line. This constant is placed both before and after the 2579 value of `LIB_SPEC'. 2580 2581 If this macro is not defined, the GNU CC driver provides a default 2582 that passes the string `-lgcc' to the linker unless the `-shared' 2583 option is specified. */ 2584 2585 #define STARTFILE_SPEC "%(crt_binutils)" 2586 /* Another C string constant used much like `LINK_SPEC'. The 2587 difference between the two is that `STARTFILE_SPEC' is used at the 2588 very beginning of the command given to the linker. 2589 2590 If this macro is not defined, a default is provided that loads the 2591 standard C startup file from the usual place. See `gcc.c'. */ 2592 2593 #define ENDFILE_SPEC "" 2594 /* Another C string constant used much like `LINK_SPEC'. The 2595 difference between the two is that `ENDFILE_SPEC' is used at the 2596 very end of the command given to the linker. 2597 2598 Do not define this macro if it does not need to do anything. */ 2599 2600 #define CRT_BINUTILS_SPECS "\ 2601 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \ 2602 %{mmcu=attiny11:crttn11.o%s} \ 2603 %{mmcu=attiny12:crttn12.o%s} \ 2604 %{mmcu=attiny15:crttn15.o%s} \ 2605 %{mmcu=attiny28:crttn28.o%s} \ 2606 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \ 2607 %{mmcu=at90s2313:crts2313.o%s} \ 2608 %{mmcu=at90s2323:crts2323.o%s} \ 2609 %{mmcu=at90s2333:crts2333.o%s} \ 2610 %{mmcu=at90s2343:crts2343.o%s} \ 2611 %{mmcu=attiny22:crttn22.o%s} \ 2612 %{mmcu=attiny26:crttn26.o%s} \ 2613 %{mmcu=at90s4433:crts4433.o%s} \ 2614 %{mmcu=at90s4414:crts4414.o%s} \ 2615 %{mmcu=at90s4434:crts4434.o%s} \ 2616 %{mmcu=at90c8534:crtc8534.o%s} \ 2617 %{mmcu=at90s8535:crts8535.o%s} \ 2618 %{mmcu=at86rf401:crt86401.o%s} \ 2619 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \ 2620 %{mmcu=atmega603:crtm603.o%s} \ 2621 %{mmcu=at43usb320:crt43320.o%s} \ 2622 %{mmcu=at43usb355:crt43355.o%s} \ 2623 %{mmcu=at76c711:crt76711.o%s} \ 2624 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \ 2625 %{mmcu=atmega8515:crtm8515.o%s} \ 2626 %{mmcu=atmega8535:crtm8535.o%s} \ 2627 %{mmcu=atmega16:crtm16.o%s} \ 2628 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \ 2629 %{mmcu=atmega162:crtm162.o%s} \ 2630 %{mmcu=atmega163:crtm163.o%s} \ 2631 %{mmcu=atmega169:crtm169.o%s} \ 2632 %{mmcu=atmega32:crtm32.o%s} \ 2633 %{mmcu=atmega323:crtm323.o%s} \ 2634 %{mmcu=atmega64:crtm64.o%s} \ 2635 %{mmcu=atmega128:crtm128.o%s} \ 2636 %{mmcu=at94k:crtat94k.o%s}" 2637 2638 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS}, 2639 2640 /* Define this macro to provide additional specifications to put in 2641 the `specs' file that can be used in various specifications like 2642 `CC1_SPEC'. */ 2643 2644 /* This is the default without any -mmcu=* option (AT90S*). */ 2645 #define MULTILIB_DEFAULTS { "mmcu=avr2" } 2646 2647 /* This is undefined macro for collect2 disabling */ 2648 #define LINKER_NAME "ld" 2649 2650 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \ 2651 TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO) 2652 2653 /* Note that the other files fail to use these 2654 in some of the places where they should. */ 2655 2656 #if defined(__STDC__) || defined(ALMOST_STDC) 2657 #define AS2(a,b,c) #a " " #b "," #c 2658 #define AS2C(b,c) " " #b "," #c 2659 #define AS3(a,b,c,d) #a " " #b "," #c "," #d 2660 #define AS1(a,b) #a " " #b 2661 #else 2662 #define AS1(a,b) "a b" 2663 #define AS2(a,b,c) "a b,c" 2664 #define AS2C(b,c) " b,c" 2665 #define AS3(a,b,c,d) "a b,c,d" 2666 #endif 2667 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands) 2668 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands) 2669 #define CR_TAB "\n\t" 2670 2671 /* Define this macro as a C statement that declares additional library 2672 routines renames existing ones. `init_optabs' calls this macro 2673 after initializing all the normal library routines. */ 2674 2675 #define INIT_TARGET_OPTABS \ 2676 { \ 2677 avr_init_once (); \ 2678 } 2679 2680 /* Temporary register r0 */ 2681 #define TMP_REGNO 0 2682 2683 /* zero register r1 */ 2684 #define ZERO_REGNO 1 2685 2686 /* Temporary register which used for load immediate values to r0-r15 */ 2687 #define LDI_REG_REGNO 31 2688 2689 extern struct rtx_def *tmp_reg_rtx; 2690 extern struct rtx_def *zero_reg_rtx; 2691 extern struct rtx_def *ldi_reg_rtx; 2692 2693 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 2694 2695 /* Get the standard ELF stabs definitions. */ 2696 #include "dbxelf.h" 2697