1 /* Definitions of target machine for GCC for IA-32.
2 Copyright (C) 1988, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC 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 3, or (at your option)
13 GCC 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.
18 Under Section 7 of GPL version 3, you are granted additional
19 permissions described in the GCC Runtime Library Exception, version
20 3.1, as published by the Free Software Foundation.
22 You should have received a copy of the GNU General Public License and
23 a copy of the GCC Runtime Library Exception along with this program;
24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 <http://www.gnu.org/licenses/>. */
27 /* The purpose of this file is to define the characteristics of the i386,
28 independent of assembler syntax or operating system.
30 Three other files build on this one to describe a specific assembler syntax:
31 bsd386.h, att386.h, and sun386.h.
33 The actual tm.h file for a particular system should include
34 this file, and then the file for the appropriate assembler syntax.
36 Many macros that specify assembler syntax are omitted entirely from
37 this file because they really belong in the files for particular
38 assemblers. These include RP, IP, LPREFIX, PUT_OP_SIZE, USE_STAR,
39 ADDR_BEG, ADDR_END, PRINT_IREG, PRINT_SCALE, PRINT_B_I_S, and many
40 that start with ASM_ or end in ASM_OP. */
42 /* Redefines for option macros. */
44 #define TARGET_64BIT OPTION_ISA_64BIT
45 #define TARGET_MMX OPTION_ISA_MMX
46 #define TARGET_3DNOW OPTION_ISA_3DNOW
47 #define TARGET_3DNOW_A OPTION_ISA_3DNOW_A
48 #define TARGET_SSE OPTION_ISA_SSE
49 #define TARGET_SSE2 OPTION_ISA_SSE2
50 #define TARGET_SSE3 OPTION_ISA_SSE3
51 #define TARGET_SSSE3 OPTION_ISA_SSSE3
52 #define TARGET_SSE4_1 OPTION_ISA_SSE4_1
53 #define TARGET_SSE4_2 OPTION_ISA_SSE4_2
54 #define TARGET_AVX OPTION_ISA_AVX
55 #define TARGET_FMA OPTION_ISA_FMA
56 #define TARGET_SSE4A OPTION_ISA_SSE4A
57 #define TARGET_SSE5 OPTION_ISA_SSE5
58 #define TARGET_ROUND OPTION_ISA_ROUND
59 #define TARGET_ABM OPTION_ISA_ABM
60 #define TARGET_POPCNT OPTION_ISA_POPCNT
61 #define TARGET_SAHF OPTION_ISA_SAHF
62 #define TARGET_MOVBE OPTION_ISA_MOVBE
63 #define TARGET_AES OPTION_ISA_AES
64 #define TARGET_PCLMUL OPTION_ISA_PCLMUL
65 #define TARGET_CMPXCHG16B OPTION_ISA_CX16
68 /* SSE5 and SSE4.1 define the same round instructions */
69 #define OPTION_MASK_ISA_ROUND (OPTION_MASK_ISA_SSE4_1 | OPTION_MASK_ISA_SSE5)
70 #define OPTION_ISA_ROUND ((ix86_isa_flags & OPTION_MASK_ISA_ROUND) != 0)
72 #include "config/vxworks-dummy.h"
74 /* Algorithm to expand string function with. */
87 #define NAX_STRINGOP_ALGS 4
89 /* Specify what algorithm to use for stringops on known size.
90 When size is unknown, the UNKNOWN_SIZE alg is used. When size is
91 known at compile time or estimated via feedback, the SIZE array
92 is walked in order until MAX is greater then the estimate (or -1
93 means infinity). Corresponding ALG is used then.
94 For example initializer:
95 {{256, loop}, {-1, rep_prefix_4_byte}}
96 will use loop for blocks smaller or equal to 256 bytes, rep prefix will
100 const enum stringop_alg unknown_size;
101 const struct stringop_strategy {
103 const enum stringop_alg alg;
104 } size [NAX_STRINGOP_ALGS];
107 /* Define the specific costs for a given cpu */
109 struct processor_costs {
110 const int add; /* cost of an add instruction */
111 const int lea; /* cost of a lea instruction */
112 const int shift_var; /* variable shift costs */
113 const int shift_const; /* constant shift costs */
114 const int mult_init[5]; /* cost of starting a multiply
115 in QImode, HImode, SImode, DImode, TImode*/
116 const int mult_bit; /* cost of multiply per each bit set */
117 const int divide[5]; /* cost of a divide/mod
118 in QImode, HImode, SImode, DImode, TImode*/
119 int movsx; /* The cost of movsx operation. */
120 int movzx; /* The cost of movzx operation. */
121 const int large_insn; /* insns larger than this cost more */
122 const int move_ratio; /* The threshold of number of scalar
123 memory-to-memory move insns. */
124 const int movzbl_load; /* cost of loading using movzbl */
125 const int int_load[3]; /* cost of loading integer registers
126 in QImode, HImode and SImode relative
127 to reg-reg move (2). */
128 const int int_store[3]; /* cost of storing integer register
129 in QImode, HImode and SImode */
130 const int fp_move; /* cost of reg,reg fld/fst */
131 const int fp_load[3]; /* cost of loading FP register
132 in SFmode, DFmode and XFmode */
133 const int fp_store[3]; /* cost of storing FP register
134 in SFmode, DFmode and XFmode */
135 const int mmx_move; /* cost of moving MMX register. */
136 const int mmx_load[2]; /* cost of loading MMX register
137 in SImode and DImode */
138 const int mmx_store[2]; /* cost of storing MMX register
139 in SImode and DImode */
140 const int sse_move; /* cost of moving SSE register. */
141 const int sse_load[3]; /* cost of loading SSE register
142 in SImode, DImode and TImode*/
143 const int sse_store[3]; /* cost of storing SSE register
144 in SImode, DImode and TImode*/
145 const int mmxsse_to_integer; /* cost of moving mmxsse register to
146 integer and vice versa. */
147 const int l1_cache_size; /* size of l1 cache, in kilobytes. */
148 const int l2_cache_size; /* size of l2 cache, in kilobytes. */
149 const int prefetch_block; /* bytes moved to cache for prefetch. */
150 const int simultaneous_prefetches; /* number of parallel prefetch
152 const int branch_cost; /* Default value for BRANCH_COST. */
153 const int fadd; /* cost of FADD and FSUB instructions. */
154 const int fmul; /* cost of FMUL instruction. */
155 const int fdiv; /* cost of FDIV instruction. */
156 const int fabs; /* cost of FABS instruction. */
157 const int fchs; /* cost of FCHS instruction. */
158 const int fsqrt; /* cost of FSQRT instruction. */
159 /* Specify what algorithm
160 to use for stringops on unknown size. */
161 struct stringop_algs memcpy[2], memset[2];
162 const int scalar_stmt_cost; /* Cost of any scalar operation, excluding
164 const int scalar_load_cost; /* Cost of scalar load. */
165 const int scalar_store_cost; /* Cost of scalar store. */
166 const int vec_stmt_cost; /* Cost of any vector operation, excluding
167 load, store, vector-to-scalar and
168 scalar-to-vector operation. */
169 const int vec_to_scalar_cost; /* Cost of vect-to-scalar operation. */
170 const int scalar_to_vec_cost; /* Cost of scalar-to-vector operation. */
171 const int vec_align_load_cost; /* Cost of aligned vector load. */
172 const int vec_unalign_load_cost; /* Cost of unaligned vector load. */
173 const int vec_store_cost; /* Cost of vector store. */
174 const int cond_taken_branch_cost; /* Cost of taken branch for vectorizer
176 const int cond_not_taken_branch_cost;/* Cost of not taken branch for
177 vectorizer cost model. */
180 extern const struct processor_costs *ix86_cost;
181 extern const struct processor_costs ix86_size_cost;
183 #define ix86_cur_cost() \
184 (optimize_insn_for_size_p () ? &ix86_size_cost: ix86_cost)
186 /* Macros used in the machine description to test the flags. */
188 /* configure can arrange to make this 2, to force a 486. */
190 #ifndef TARGET_CPU_DEFAULT
191 #define TARGET_CPU_DEFAULT TARGET_CPU_DEFAULT_generic
194 #ifndef TARGET_FPMATH_DEFAULT
195 #define TARGET_FPMATH_DEFAULT \
196 (TARGET_64BIT && TARGET_SSE ? FPMATH_SSE : FPMATH_387)
199 #define TARGET_FLOAT_RETURNS_IN_80387 TARGET_FLOAT_RETURNS
201 /* 64bit Sledgehammer mode. For libgcc2 we make sure this is a
202 compile-time constant. */
206 #define TARGET_64BIT 1
208 #define TARGET_64BIT 0
211 #ifndef TARGET_BI_ARCH
213 #if TARGET_64BIT_DEFAULT
214 #define TARGET_64BIT 1
216 #define TARGET_64BIT 0
221 #define HAS_LONG_COND_BRANCH 1
222 #define HAS_LONG_UNCOND_BRANCH 1
224 #define TARGET_386 (ix86_tune == PROCESSOR_I386)
225 #define TARGET_486 (ix86_tune == PROCESSOR_I486)
226 #define TARGET_PENTIUM (ix86_tune == PROCESSOR_PENTIUM)
227 #define TARGET_PENTIUMPRO (ix86_tune == PROCESSOR_PENTIUMPRO)
228 #define TARGET_GEODE (ix86_tune == PROCESSOR_GEODE)
229 #define TARGET_K6 (ix86_tune == PROCESSOR_K6)
230 #define TARGET_ATHLON (ix86_tune == PROCESSOR_ATHLON)
231 #define TARGET_PENTIUM4 (ix86_tune == PROCESSOR_PENTIUM4)
232 #define TARGET_K8 (ix86_tune == PROCESSOR_K8)
233 #define TARGET_ATHLON_K8 (TARGET_K8 || TARGET_ATHLON)
234 #define TARGET_NOCONA (ix86_tune == PROCESSOR_NOCONA)
235 #define TARGET_CORE2 (ix86_tune == PROCESSOR_CORE2)
236 #define TARGET_GENERIC32 (ix86_tune == PROCESSOR_GENERIC32)
237 #define TARGET_GENERIC64 (ix86_tune == PROCESSOR_GENERIC64)
238 #define TARGET_GENERIC (TARGET_GENERIC32 || TARGET_GENERIC64)
239 #define TARGET_AMDFAM10 (ix86_tune == PROCESSOR_AMDFAM10)
240 #define TARGET_ATOM (ix86_tune == PROCESSOR_ATOM)
242 /* Feature tests against the various tunings. */
243 enum ix86_tune_indices {
245 X86_TUNE_PUSH_MEMORY,
246 X86_TUNE_ZERO_EXTEND_WITH_AND,
247 X86_TUNE_UNROLL_STRLEN,
248 X86_TUNE_DEEP_BRANCH_PREDICTION,
249 X86_TUNE_BRANCH_PREDICTION_HINTS,
250 X86_TUNE_DOUBLE_WITH_ADD,
253 X86_TUNE_PARTIAL_REG_STALL,
254 X86_TUNE_PARTIAL_FLAG_REG_STALL,
255 X86_TUNE_USE_HIMODE_FIOP,
256 X86_TUNE_USE_SIMODE_FIOP,
260 X86_TUNE_SPLIT_LONG_MOVES,
261 X86_TUNE_READ_MODIFY_WRITE,
262 X86_TUNE_READ_MODIFY,
263 X86_TUNE_PROMOTE_QIMODE,
264 X86_TUNE_FAST_PREFIX,
265 X86_TUNE_SINGLE_STRINGOP,
266 X86_TUNE_QIMODE_MATH,
267 X86_TUNE_HIMODE_MATH,
268 X86_TUNE_PROMOTE_QI_REGS,
269 X86_TUNE_PROMOTE_HI_REGS,
274 X86_TUNE_INTEGER_DFMODE_MOVES,
275 X86_TUNE_PARTIAL_REG_DEPENDENCY,
276 X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY,
277 X86_TUNE_SSE_UNALIGNED_MOVE_OPTIMAL,
278 X86_TUNE_SSE_SPLIT_REGS,
279 X86_TUNE_SSE_TYPELESS_STORES,
280 X86_TUNE_SSE_LOAD0_BY_PXOR,
281 X86_TUNE_MEMORY_MISMATCH_STALL,
282 X86_TUNE_PROLOGUE_USING_MOVE,
283 X86_TUNE_EPILOGUE_USING_MOVE,
286 X86_TUNE_INTER_UNIT_MOVES,
287 X86_TUNE_INTER_UNIT_CONVERSIONS,
288 X86_TUNE_FOUR_JUMP_LIMIT,
292 X86_TUNE_PAD_RETURNS,
293 X86_TUNE_EXT_80387_CONSTANTS,
294 X86_TUNE_SHORTEN_X87_SSE,
295 X86_TUNE_AVOID_VECTOR_DECODE,
296 X86_TUNE_PROMOTE_HIMODE_IMUL,
297 X86_TUNE_SLOW_IMUL_IMM32_MEM,
298 X86_TUNE_SLOW_IMUL_IMM8,
299 X86_TUNE_MOVE_M1_VIA_OR,
300 X86_TUNE_NOT_UNPAIRABLE,
301 X86_TUNE_NOT_VECTORMODE,
302 X86_TUNE_USE_VECTOR_FP_CONVERTS,
303 X86_TUNE_USE_VECTOR_CONVERTS,
304 X86_TUNE_FUSE_CMP_AND_BRANCH,
310 extern unsigned char ix86_tune_features[X86_TUNE_LAST];
312 #define TARGET_USE_LEAVE ix86_tune_features[X86_TUNE_USE_LEAVE]
313 #define TARGET_PUSH_MEMORY ix86_tune_features[X86_TUNE_PUSH_MEMORY]
314 #define TARGET_ZERO_EXTEND_WITH_AND \
315 ix86_tune_features[X86_TUNE_ZERO_EXTEND_WITH_AND]
316 #define TARGET_UNROLL_STRLEN ix86_tune_features[X86_TUNE_UNROLL_STRLEN]
317 #define TARGET_DEEP_BRANCH_PREDICTION \
318 ix86_tune_features[X86_TUNE_DEEP_BRANCH_PREDICTION]
319 #define TARGET_BRANCH_PREDICTION_HINTS \
320 ix86_tune_features[X86_TUNE_BRANCH_PREDICTION_HINTS]
321 #define TARGET_DOUBLE_WITH_ADD ix86_tune_features[X86_TUNE_DOUBLE_WITH_ADD]
322 #define TARGET_USE_SAHF ix86_tune_features[X86_TUNE_USE_SAHF]
323 #define TARGET_MOVX ix86_tune_features[X86_TUNE_MOVX]
324 #define TARGET_PARTIAL_REG_STALL ix86_tune_features[X86_TUNE_PARTIAL_REG_STALL]
325 #define TARGET_PARTIAL_FLAG_REG_STALL \
326 ix86_tune_features[X86_TUNE_PARTIAL_FLAG_REG_STALL]
327 #define TARGET_USE_HIMODE_FIOP ix86_tune_features[X86_TUNE_USE_HIMODE_FIOP]
328 #define TARGET_USE_SIMODE_FIOP ix86_tune_features[X86_TUNE_USE_SIMODE_FIOP]
329 #define TARGET_USE_MOV0 ix86_tune_features[X86_TUNE_USE_MOV0]
330 #define TARGET_USE_CLTD ix86_tune_features[X86_TUNE_USE_CLTD]
331 #define TARGET_USE_XCHGB ix86_tune_features[X86_TUNE_USE_XCHGB]
332 #define TARGET_SPLIT_LONG_MOVES ix86_tune_features[X86_TUNE_SPLIT_LONG_MOVES]
333 #define TARGET_READ_MODIFY_WRITE ix86_tune_features[X86_TUNE_READ_MODIFY_WRITE]
334 #define TARGET_READ_MODIFY ix86_tune_features[X86_TUNE_READ_MODIFY]
335 #define TARGET_PROMOTE_QImode ix86_tune_features[X86_TUNE_PROMOTE_QIMODE]
336 #define TARGET_FAST_PREFIX ix86_tune_features[X86_TUNE_FAST_PREFIX]
337 #define TARGET_SINGLE_STRINGOP ix86_tune_features[X86_TUNE_SINGLE_STRINGOP]
338 #define TARGET_QIMODE_MATH ix86_tune_features[X86_TUNE_QIMODE_MATH]
339 #define TARGET_HIMODE_MATH ix86_tune_features[X86_TUNE_HIMODE_MATH]
340 #define TARGET_PROMOTE_QI_REGS ix86_tune_features[X86_TUNE_PROMOTE_QI_REGS]
341 #define TARGET_PROMOTE_HI_REGS ix86_tune_features[X86_TUNE_PROMOTE_HI_REGS]
342 #define TARGET_ADD_ESP_4 ix86_tune_features[X86_TUNE_ADD_ESP_4]
343 #define TARGET_ADD_ESP_8 ix86_tune_features[X86_TUNE_ADD_ESP_8]
344 #define TARGET_SUB_ESP_4 ix86_tune_features[X86_TUNE_SUB_ESP_4]
345 #define TARGET_SUB_ESP_8 ix86_tune_features[X86_TUNE_SUB_ESP_8]
346 #define TARGET_INTEGER_DFMODE_MOVES \
347 ix86_tune_features[X86_TUNE_INTEGER_DFMODE_MOVES]
348 #define TARGET_PARTIAL_REG_DEPENDENCY \
349 ix86_tune_features[X86_TUNE_PARTIAL_REG_DEPENDENCY]
350 #define TARGET_SSE_PARTIAL_REG_DEPENDENCY \
351 ix86_tune_features[X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY]
352 #define TARGET_SSE_UNALIGNED_MOVE_OPTIMAL \
353 ix86_tune_features[X86_TUNE_SSE_UNALIGNED_MOVE_OPTIMAL]
354 #define TARGET_SSE_SPLIT_REGS ix86_tune_features[X86_TUNE_SSE_SPLIT_REGS]
355 #define TARGET_SSE_TYPELESS_STORES \
356 ix86_tune_features[X86_TUNE_SSE_TYPELESS_STORES]
357 #define TARGET_SSE_LOAD0_BY_PXOR ix86_tune_features[X86_TUNE_SSE_LOAD0_BY_PXOR]
358 #define TARGET_MEMORY_MISMATCH_STALL \
359 ix86_tune_features[X86_TUNE_MEMORY_MISMATCH_STALL]
360 #define TARGET_PROLOGUE_USING_MOVE \
361 ix86_tune_features[X86_TUNE_PROLOGUE_USING_MOVE]
362 #define TARGET_EPILOGUE_USING_MOVE \
363 ix86_tune_features[X86_TUNE_EPILOGUE_USING_MOVE]
364 #define TARGET_SHIFT1 ix86_tune_features[X86_TUNE_SHIFT1]
365 #define TARGET_USE_FFREEP ix86_tune_features[X86_TUNE_USE_FFREEP]
366 #define TARGET_INTER_UNIT_MOVES ix86_tune_features[X86_TUNE_INTER_UNIT_MOVES]
367 #define TARGET_INTER_UNIT_CONVERSIONS\
368 ix86_tune_features[X86_TUNE_INTER_UNIT_CONVERSIONS]
369 #define TARGET_FOUR_JUMP_LIMIT ix86_tune_features[X86_TUNE_FOUR_JUMP_LIMIT]
370 #define TARGET_SCHEDULE ix86_tune_features[X86_TUNE_SCHEDULE]
371 #define TARGET_USE_BT ix86_tune_features[X86_TUNE_USE_BT]
372 #define TARGET_USE_INCDEC ix86_tune_features[X86_TUNE_USE_INCDEC]
373 #define TARGET_PAD_RETURNS ix86_tune_features[X86_TUNE_PAD_RETURNS]
374 #define TARGET_EXT_80387_CONSTANTS \
375 ix86_tune_features[X86_TUNE_EXT_80387_CONSTANTS]
376 #define TARGET_SHORTEN_X87_SSE ix86_tune_features[X86_TUNE_SHORTEN_X87_SSE]
377 #define TARGET_AVOID_VECTOR_DECODE \
378 ix86_tune_features[X86_TUNE_AVOID_VECTOR_DECODE]
379 #define TARGET_TUNE_PROMOTE_HIMODE_IMUL \
380 ix86_tune_features[X86_TUNE_PROMOTE_HIMODE_IMUL]
381 #define TARGET_SLOW_IMUL_IMM32_MEM \
382 ix86_tune_features[X86_TUNE_SLOW_IMUL_IMM32_MEM]
383 #define TARGET_SLOW_IMUL_IMM8 ix86_tune_features[X86_TUNE_SLOW_IMUL_IMM8]
384 #define TARGET_MOVE_M1_VIA_OR ix86_tune_features[X86_TUNE_MOVE_M1_VIA_OR]
385 #define TARGET_NOT_UNPAIRABLE ix86_tune_features[X86_TUNE_NOT_UNPAIRABLE]
386 #define TARGET_NOT_VECTORMODE ix86_tune_features[X86_TUNE_NOT_VECTORMODE]
387 #define TARGET_USE_VECTOR_FP_CONVERTS \
388 ix86_tune_features[X86_TUNE_USE_VECTOR_FP_CONVERTS]
389 #define TARGET_USE_VECTOR_CONVERTS \
390 ix86_tune_features[X86_TUNE_USE_VECTOR_CONVERTS]
391 #define TARGET_FUSE_CMP_AND_BRANCH \
392 ix86_tune_features[X86_TUNE_FUSE_CMP_AND_BRANCH]
393 #define TARGET_OPT_AGU ix86_tune_features[X86_TUNE_OPT_AGU]
395 /* Feature tests against the various architecture variations. */
396 enum ix86_arch_indices {
397 X86_ARCH_CMOVE, /* || TARGET_SSE */
406 extern unsigned char ix86_arch_features[X86_ARCH_LAST];
408 #define TARGET_CMOVE ix86_arch_features[X86_ARCH_CMOVE]
409 #define TARGET_CMPXCHG ix86_arch_features[X86_ARCH_CMPXCHG]
410 #define TARGET_CMPXCHG8B ix86_arch_features[X86_ARCH_CMPXCHG8B]
411 #define TARGET_XADD ix86_arch_features[X86_ARCH_XADD]
412 #define TARGET_BSWAP ix86_arch_features[X86_ARCH_BSWAP]
414 #define TARGET_FISTTP (TARGET_SSE3 && TARGET_80387)
416 extern int x86_prefetch_sse;
418 #define TARGET_PREFETCH_SSE x86_prefetch_sse
420 #define ASSEMBLER_DIALECT (ix86_asm_dialect)
422 #define TARGET_SSE_MATH ((ix86_fpmath & FPMATH_SSE) != 0)
423 #define TARGET_MIX_SSE_I387 \
424 ((ix86_fpmath & (FPMATH_SSE | FPMATH_387)) == (FPMATH_SSE | FPMATH_387))
426 #define TARGET_GNU_TLS (ix86_tls_dialect == TLS_DIALECT_GNU)
427 #define TARGET_GNU2_TLS (ix86_tls_dialect == TLS_DIALECT_GNU2)
428 #define TARGET_ANY_GNU_TLS (TARGET_GNU_TLS || TARGET_GNU2_TLS)
429 #define TARGET_SUN_TLS (ix86_tls_dialect == TLS_DIALECT_SUN)
431 extern int ix86_isa_flags;
433 #ifndef TARGET_64BIT_DEFAULT
434 #define TARGET_64BIT_DEFAULT 0
436 #ifndef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
437 #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT 0
440 /* Fence to use after loop using storent. */
442 extern tree x86_mfence;
443 #define FENCE_FOLLOWING_MOVNT x86_mfence
445 /* Once GDB has been enhanced to deal with functions without frame
446 pointers, we can change this to allow for elimination of
447 the frame pointer in leaf functions. */
448 #define TARGET_DEFAULT 0
450 /* Extra bits to force. */
451 #define TARGET_SUBTARGET_DEFAULT 0
452 #define TARGET_SUBTARGET_ISA_DEFAULT 0
454 /* Extra bits to force on w/ 32-bit mode. */
455 #define TARGET_SUBTARGET32_DEFAULT 0
456 #define TARGET_SUBTARGET32_ISA_DEFAULT 0
458 /* Extra bits to force on w/ 64-bit mode. */
459 #define TARGET_SUBTARGET64_DEFAULT 0
460 #define TARGET_SUBTARGET64_ISA_DEFAULT 0
462 /* This is not really a target flag, but is done this way so that
463 it's analogous to similar code for Mach-O on PowerPC. darwin.h
464 redefines this to 1. */
465 #define TARGET_MACHO 0
467 /* Likewise, for the Windows 64-bit ABI. */
468 #define TARGET_64BIT_MS_ABI (TARGET_64BIT && ix86_cfun_abi () == MS_ABI)
470 /* Available call abi. */
477 /* The abi used by target. */
478 extern enum calling_abi ix86_abi;
480 /* The default abi used by target. */
481 #define DEFAULT_ABI SYSV_ABI
483 /* Subtargets may reset this to 1 in order to enable 96-bit long double
484 with the rounding mode forced to 53 bits. */
485 #define TARGET_96_ROUND_53_LONG_DOUBLE 0
487 /* Sometimes certain combinations of command options do not make
488 sense on a particular target machine. You can define a macro
489 `OVERRIDE_OPTIONS' to take account of this. This macro, if
490 defined, is executed once just after all the command options have
493 Don't use this macro to turn on various extra optimizations for
494 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
496 #define OVERRIDE_OPTIONS override_options (true)
498 /* Define this to change the optimizations performed by default. */
499 #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \
500 optimization_options ((LEVEL), (SIZE))
502 /* -march=native handling only makes sense with compiler running on
503 an x86 or x86_64 chip. If changing this condition, also change
504 the condition in driver-i386.c. */
505 #if defined(__i386__) || defined(__x86_64__)
506 /* In driver-i386.c. */
507 extern const char *host_detect_local_cpu (int argc, const char **argv);
508 #define EXTRA_SPEC_FUNCTIONS \
509 { "local_cpu_detect", host_detect_local_cpu },
510 #define HAVE_LOCAL_CPU_DETECT
513 #if TARGET_64BIT_DEFAULT
514 #define OPT_ARCH64 "!m32"
515 #define OPT_ARCH32 "m32"
517 #define OPT_ARCH64 "m64"
518 #define OPT_ARCH32 "!m64"
521 /* Support for configure-time defaults of some command line options.
522 The order here is important so that -march doesn't squash the
523 tune or cpu values. */
524 #define OPTION_DEFAULT_SPECS \
525 {"tune", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }, \
526 {"tune_32", "%{" OPT_ARCH32 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \
527 {"tune_64", "%{" OPT_ARCH64 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \
528 {"cpu", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }, \
529 {"cpu_32", "%{" OPT_ARCH32 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \
530 {"cpu_64", "%{" OPT_ARCH64 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \
531 {"arch", "%{!march=*:-march=%(VALUE)}"}, \
532 {"arch_32", "%{" OPT_ARCH32 ":%{!march=*:-march=%(VALUE)}}"}, \
533 {"arch_64", "%{" OPT_ARCH64 ":%{!march=*:-march=%(VALUE)}}"},
535 /* Specs for the compiler proper */
538 #define CC1_CPU_SPEC_1 "\
540 %n`-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.\n} \
542 %{mintel-syntax:-masm=intel \
543 %n`-mintel-syntax' is deprecated. Use `-masm=intel' instead.\n} \
544 %{mno-intel-syntax:-masm=att \
545 %n`-mno-intel-syntax' is deprecated. Use `-masm=att' instead.\n}"
547 #ifndef HAVE_LOCAL_CPU_DETECT
548 #define CC1_CPU_SPEC CC1_CPU_SPEC_1
550 #define CC1_CPU_SPEC CC1_CPU_SPEC_1 \
551 "%{march=native:%<march=native %:local_cpu_detect(arch) \
552 %{!mtune=*:%<mtune=native %:local_cpu_detect(tune)}} \
553 %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
557 /* Target CPU builtins. */
558 #define TARGET_CPU_CPP_BUILTINS() ix86_target_macros ()
560 /* Target Pragmas. */
561 #define REGISTER_TARGET_PRAGMAS() ix86_register_pragmas ()
563 enum target_cpu_default
565 TARGET_CPU_DEFAULT_generic = 0,
567 TARGET_CPU_DEFAULT_i386,
568 TARGET_CPU_DEFAULT_i486,
569 TARGET_CPU_DEFAULT_pentium,
570 TARGET_CPU_DEFAULT_pentium_mmx,
571 TARGET_CPU_DEFAULT_pentiumpro,
572 TARGET_CPU_DEFAULT_pentium2,
573 TARGET_CPU_DEFAULT_pentium3,
574 TARGET_CPU_DEFAULT_pentium4,
575 TARGET_CPU_DEFAULT_pentium_m,
576 TARGET_CPU_DEFAULT_prescott,
577 TARGET_CPU_DEFAULT_nocona,
578 TARGET_CPU_DEFAULT_core2,
579 TARGET_CPU_DEFAULT_atom,
581 TARGET_CPU_DEFAULT_geode,
582 TARGET_CPU_DEFAULT_k6,
583 TARGET_CPU_DEFAULT_k6_2,
584 TARGET_CPU_DEFAULT_k6_3,
585 TARGET_CPU_DEFAULT_athlon,
586 TARGET_CPU_DEFAULT_athlon_sse,
587 TARGET_CPU_DEFAULT_k8,
588 TARGET_CPU_DEFAULT_amdfam10,
590 TARGET_CPU_DEFAULT_max
594 #define CC1_SPEC "%(cc1_cpu) "
597 /* This macro defines names of additional specifications to put in the
598 specs that can be used in various specifications like CC1_SPEC. Its
599 definition is an initializer with a subgrouping for each command option.
601 Each subgrouping contains a string constant, that defines the
602 specification name, and a string constant that used by the GCC driver
605 Do not define this macro if it does not need to do anything. */
607 #ifndef SUBTARGET_EXTRA_SPECS
608 #define SUBTARGET_EXTRA_SPECS
611 #define EXTRA_SPECS \
612 { "cc1_cpu", CC1_CPU_SPEC }, \
613 SUBTARGET_EXTRA_SPECS
616 /* Set the value of FLT_EVAL_METHOD in float.h. When using only the
617 FPU, assume that the fpcw is set to extended precision; when using
618 only SSE, rounding is correct; when using both SSE and the FPU,
619 the rounding precision is indeterminate, since either may be chosen
620 apparently at random. */
621 #define TARGET_FLT_EVAL_METHOD \
622 (TARGET_MIX_SSE_I387 ? -1 : TARGET_SSE_MATH ? 0 : 2)
624 /* Whether to allow x87 floating-point arithmetic on MODE (one of
625 SFmode, DFmode and XFmode) in the current excess precision
627 #define X87_ENABLE_ARITH(MODE) \
628 (flag_excess_precision == EXCESS_PRECISION_FAST || (MODE) == XFmode)
630 /* Likewise, whether to allow direct conversions from integer mode
631 IMODE (HImode, SImode or DImode) to MODE. */
632 #define X87_ENABLE_FLOAT(MODE, IMODE) \
633 (flag_excess_precision == EXCESS_PRECISION_FAST \
634 || (MODE) == XFmode \
635 || ((MODE) == DFmode && (IMODE) == SImode) \
636 || (IMODE) == HImode)
638 /* target machine storage layout */
640 #define SHORT_TYPE_SIZE 16
641 #define INT_TYPE_SIZE 32
642 #define FLOAT_TYPE_SIZE 32
643 #define LONG_TYPE_SIZE BITS_PER_WORD
644 #define DOUBLE_TYPE_SIZE 64
645 #define LONG_LONG_TYPE_SIZE 64
646 #define LONG_DOUBLE_TYPE_SIZE 80
648 #define WIDEST_HARDWARE_FP_SIZE LONG_DOUBLE_TYPE_SIZE
650 #if defined (TARGET_BI_ARCH) || TARGET_64BIT_DEFAULT
651 #define MAX_BITS_PER_WORD 64
653 #define MAX_BITS_PER_WORD 32
656 /* Define this if most significant byte of a word is the lowest numbered. */
657 /* That is true on the 80386. */
659 #define BITS_BIG_ENDIAN 0
661 /* Define this if most significant byte of a word is the lowest numbered. */
662 /* That is not true on the 80386. */
663 #define BYTES_BIG_ENDIAN 0
665 /* Define this if most significant word of a multiword number is the lowest
667 /* Not true for 80386 */
668 #define WORDS_BIG_ENDIAN 0
670 /* Width of a word, in units (bytes). */
671 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
673 #define MIN_UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
675 #define MIN_UNITS_PER_WORD 4
678 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
679 #define PARM_BOUNDARY BITS_PER_WORD
681 /* Boundary (in *bits*) on which stack pointer should be aligned. */
682 #define STACK_BOUNDARY \
683 (TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD)
685 /* Stack boundary of the main function guaranteed by OS. */
686 #define MAIN_STACK_BOUNDARY (TARGET_64BIT ? 128 : 32)
688 /* Minimum stack boundary. */
689 #define MIN_STACK_BOUNDARY (TARGET_64BIT ? 128 : 32)
691 /* Boundary (in *bits*) on which the stack pointer prefers to be
692 aligned; the compiler cannot rely on having this alignment. */
693 #define PREFERRED_STACK_BOUNDARY ix86_preferred_stack_boundary
695 /* It should be MIN_STACK_BOUNDARY. But we set it to 128 bits for
696 both 32bit and 64bit, to support codes that need 128 bit stack
697 alignment for SSE instructions, but can't realign the stack. */
698 #define PREFERRED_STACK_BOUNDARY_DEFAULT 128
700 /* 1 if -mstackrealign should be turned on by default. It will
701 generate an alternate prologue and epilogue that realigns the
702 runtime stack if nessary. This supports mixing codes that keep a
703 4-byte aligned stack, as specified by i386 psABI, with codes that
704 need a 16-byte aligned stack, as required by SSE instructions. If
705 STACK_REALIGN_DEFAULT is 1 and PREFERRED_STACK_BOUNDARY_DEFAULT is
706 128, stacks for all functions may be realigned. */
707 #define STACK_REALIGN_DEFAULT 0
709 /* Boundary (in *bits*) on which the incoming stack is aligned. */
710 #define INCOMING_STACK_BOUNDARY ix86_incoming_stack_boundary
712 /* Target OS keeps a vector-aligned (128-bit, 16-byte) stack. This is
713 mandatory for the 64-bit ABI, and may or may not be true for other
714 operating systems. */
715 #define TARGET_KEEPS_VECTOR_ALIGNED_STACK TARGET_64BIT
717 /* Minimum allocation boundary for the code of a function. */
718 #define FUNCTION_BOUNDARY 8
720 /* C++ stores the virtual bit in the lowest bit of function pointers. */
721 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_pfn
723 /* Alignment of field after `int : 0' in a structure. */
725 #define EMPTY_FIELD_BOUNDARY BITS_PER_WORD
727 /* Minimum size in bits of the largest boundary to which any
728 and all fundamental data types supported by the hardware
729 might need to be aligned. No data type wants to be aligned
732 Pentium+ prefers DFmode values to be aligned to 64 bit boundary
733 and Pentium Pro XFmode values at 128 bit boundaries. */
735 #define BIGGEST_ALIGNMENT (TARGET_AVX ? 256: 128)
737 /* Maximum stack alignment. */
738 #define MAX_STACK_ALIGNMENT MAX_OFILE_ALIGNMENT
740 /* Alignment value for attribute ((aligned)). It is a constant since
741 it is the part of the ABI. We shouldn't change it with -mavx. */
742 #define ATTRIBUTE_ALIGNED_VALUE 128
744 /* Decide whether a variable of mode MODE should be 128 bit aligned. */
745 #define ALIGN_MODE_128(MODE) \
746 ((MODE) == XFmode || SSE_REG_MODE_P (MODE))
748 /* The published ABIs say that doubles should be aligned on word
749 boundaries, so lower the alignment for structure fields unless
750 -malign-double is set. */
752 /* ??? Blah -- this macro is used directly by libobjc. Since it
753 supports no vector modes, cut out the complexity and fall back
754 on BIGGEST_FIELD_ALIGNMENT. */
755 #ifdef IN_TARGET_LIBS
757 #define BIGGEST_FIELD_ALIGNMENT 128
759 #define BIGGEST_FIELD_ALIGNMENT 32
762 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
763 x86_field_alignment (FIELD, COMPUTED)
766 /* If defined, a C expression to compute the alignment given to a
767 constant that is being placed in memory. EXP is the constant
768 and ALIGN is the alignment that the object would ordinarily have.
769 The value of this macro is used instead of that alignment to align
772 If this macro is not defined, then ALIGN is used.
774 The typical use of this macro is to increase alignment for string
775 constants to be word aligned so that `strcpy' calls that copy
776 constants can be done inline. */
778 #define CONSTANT_ALIGNMENT(EXP, ALIGN) ix86_constant_alignment ((EXP), (ALIGN))
780 /* If defined, a C expression to compute the alignment for a static
781 variable. TYPE is the data type, and ALIGN is the alignment that
782 the object would ordinarily have. The value of this macro is used
783 instead of that alignment to align the object.
785 If this macro is not defined, then ALIGN is used.
787 One use of this macro is to increase alignment of medium-size
788 data to make it all fit in fewer cache lines. Another is to
789 cause character arrays to be word-aligned so that `strcpy' calls
790 that copy constants to character arrays can be done inline. */
792 #define DATA_ALIGNMENT(TYPE, ALIGN) ix86_data_alignment ((TYPE), (ALIGN))
794 /* If defined, a C expression to compute the alignment for a local
795 variable. TYPE is the data type, and ALIGN is the alignment that
796 the object would ordinarily have. The value of this macro is used
797 instead of that alignment to align the object.
799 If this macro is not defined, then ALIGN is used.
801 One use of this macro is to increase alignment of medium-size
802 data to make it all fit in fewer cache lines. */
804 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
805 ix86_local_alignment ((TYPE), VOIDmode, (ALIGN))
807 /* If defined, a C expression to compute the alignment for stack slot.
808 TYPE is the data type, MODE is the widest mode available, and ALIGN
809 is the alignment that the slot would ordinarily have. The value of
810 this macro is used instead of that alignment to align the slot.
812 If this macro is not defined, then ALIGN is used when TYPE is NULL,
813 Otherwise, LOCAL_ALIGNMENT will be used.
815 One use of this macro is to set alignment of stack slot to the
816 maximum alignment of all possible modes which the slot may have. */
818 #define STACK_SLOT_ALIGNMENT(TYPE, MODE, ALIGN) \
819 ix86_local_alignment ((TYPE), (MODE), (ALIGN))
821 /* If defined, a C expression to compute the alignment for a local
824 If this macro is not defined, then
825 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL)) will be used.
827 One use of this macro is to increase alignment of medium-size
828 data to make it all fit in fewer cache lines. */
830 #define LOCAL_DECL_ALIGNMENT(DECL) \
831 ix86_local_alignment ((DECL), VOIDmode, DECL_ALIGN (DECL))
834 /* If defined, a C expression that gives the alignment boundary, in
835 bits, of an argument with the specified mode and type. If it is
836 not defined, `PARM_BOUNDARY' is used for all arguments. */
838 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
839 ix86_function_arg_boundary ((MODE), (TYPE))
841 /* Set this nonzero if move instructions will actually fail to work
842 when given unaligned data. */
843 #define STRICT_ALIGNMENT 0
845 /* If bit field type is int, don't let it cross an int,
846 and give entire struct the alignment of an int. */
847 /* Required on the 386 since it doesn't have bit-field insns. */
848 #define PCC_BITFIELD_TYPE_MATTERS 1
850 /* Standard register usage. */
852 /* This processor has special stack-like registers. See reg-stack.c
857 #define IS_STACK_MODE(MODE) \
858 (((MODE) == SFmode && (!TARGET_SSE || !TARGET_SSE_MATH)) \
859 || ((MODE) == DFmode && (!TARGET_SSE2 || !TARGET_SSE_MATH)) \
862 /* Number of actual hardware registers.
863 The hardware registers are assigned numbers for the compiler
864 from 0 to just below FIRST_PSEUDO_REGISTER.
865 All registers that the compiler knows about must be given numbers,
866 even those that are not normally considered general registers.
868 In the 80386 we give the 8 general purpose registers the numbers 0-7.
869 We number the floating point registers 8-15.
870 Note that registers 0-7 can be accessed as a short or int,
871 while only 0-3 may be used with byte `mov' instructions.
873 Reg 16 does not correspond to any hardware register, but instead
874 appears in the RTL as an argument pointer prior to reload, and is
875 eliminated during reloading in favor of either the stack or frame
878 #define FIRST_PSEUDO_REGISTER 53
880 /* Number of hardware registers that go into the DWARF-2 unwind info.
881 If not defined, equals FIRST_PSEUDO_REGISTER. */
883 #define DWARF_FRAME_REGISTERS 17
885 /* 1 for registers that have pervasive standard uses
886 and are not available for the register allocator.
887 On the 80386, the stack pointer is such, as is the arg pointer.
889 The value is zero if the register is not fixed on either 32 or
890 64 bit targets, one if the register if fixed on both 32 and 64
891 bit targets, two if it is only fixed on 32bit targets and three
892 if its only fixed on 64bit targets.
893 Proper values are computed in the CONDITIONAL_REGISTER_USAGE.
895 #define FIXED_REGISTERS \
896 /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \
897 { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, \
898 /*arg,flags,fpsr,fpcr,frame*/ \
900 /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \
901 0, 0, 0, 0, 0, 0, 0, 0, \
902 /* mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7*/ \
903 0, 0, 0, 0, 0, 0, 0, 0, \
904 /* r8, r9, r10, r11, r12, r13, r14, r15*/ \
905 2, 2, 2, 2, 2, 2, 2, 2, \
906 /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \
907 2, 2, 2, 2, 2, 2, 2, 2 }
910 /* 1 for registers not available across function calls.
911 These must include the FIXED_REGISTERS and also any
912 registers that can be used without being saved.
913 The latter must include the registers where values are returned
914 and the register where structure-value addresses are passed.
915 Aside from that, you can include as many other registers as you like.
917 The value is zero if the register is not call used on either 32 or
918 64 bit targets, one if the register if call used on both 32 and 64
919 bit targets, two if it is only call used on 32bit targets and three
920 if its only call used on 64bit targets.
921 Proper values are computed in the CONDITIONAL_REGISTER_USAGE.
923 #define CALL_USED_REGISTERS \
924 /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \
925 { 1, 1, 1, 0, 3, 3, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
926 /*arg,flags,fpsr,fpcr,frame*/ \
928 /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \
929 1, 1, 1, 1, 1, 1, 1, 1, \
930 /* mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7*/ \
931 1, 1, 1, 1, 1, 1, 1, 1, \
932 /* r8, r9, r10, r11, r12, r13, r14, r15*/ \
933 1, 1, 1, 1, 2, 2, 2, 2, \
934 /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \
935 1, 1, 1, 1, 1, 1, 1, 1 }
937 /* Order in which to allocate registers. Each register must be
938 listed once, even those in FIXED_REGISTERS. List frame pointer
939 late and fixed registers last. Note that, in general, we prefer
940 registers listed in CALL_USED_REGISTERS, keeping the others
941 available for storage of persistent values.
943 The ORDER_REGS_FOR_LOCAL_ALLOC actually overwrite the order,
944 so this is just empty initializer for array. */
946 #define REG_ALLOC_ORDER \
947 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,\
948 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, \
949 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \
952 /* ORDER_REGS_FOR_LOCAL_ALLOC is a macro which permits reg_alloc_order
953 to be rearranged based on a particular function. When using sse math,
954 we want to allocate SSE before x87 registers and vice versa. */
956 #define ORDER_REGS_FOR_LOCAL_ALLOC x86_order_regs_for_local_alloc ()
959 #define OVERRIDE_ABI_FORMAT(FNDECL) ix86_call_abi_override (FNDECL)
961 /* Macro to conditionally modify fixed_regs/call_used_regs. */
962 #define CONDITIONAL_REGISTER_USAGE \
966 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \
968 if (fixed_regs[i] > 1) \
969 fixed_regs[i] = (fixed_regs[i] == (TARGET_64BIT ? 3 : 2)); \
970 if (call_used_regs[i] > 1) \
971 call_used_regs[i] = (call_used_regs[i] \
972 == (TARGET_64BIT ? 3 : 2)); \
974 j = PIC_OFFSET_TABLE_REGNUM; \
975 if (j != INVALID_REGNUM) \
976 fixed_regs[j] = call_used_regs[j] = 1; \
978 && ((cfun && cfun->machine->call_abi == MS_ABI) \
979 || (!cfun && ix86_abi == MS_ABI))) \
981 call_used_regs[SI_REG] = 0; \
982 call_used_regs[DI_REG] = 0; \
983 call_used_regs[XMM6_REG] = 0; \
984 call_used_regs[XMM7_REG] = 0; \
985 for (i = FIRST_REX_SSE_REG; i <= LAST_REX_SSE_REG; i++) \
986 call_used_regs[i] = 0; \
989 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \
990 if (TEST_HARD_REG_BIT (reg_class_contents[(int)MMX_REGS], i)) \
991 fixed_regs[i] = call_used_regs[i] = 1, reg_names[i] = ""; \
993 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \
994 if (TEST_HARD_REG_BIT (reg_class_contents[(int)SSE_REGS], i)) \
995 fixed_regs[i] = call_used_regs[i] = 1, reg_names[i] = ""; \
996 if (! (TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387)) \
997 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \
998 if (TEST_HARD_REG_BIT (reg_class_contents[(int)FLOAT_REGS], i)) \
999 fixed_regs[i] = call_used_regs[i] = 1, reg_names[i] = ""; \
1000 if (! TARGET_64BIT) \
1002 for (i = FIRST_REX_INT_REG; i <= LAST_REX_INT_REG; i++) \
1003 reg_names[i] = ""; \
1004 for (i = FIRST_REX_SSE_REG; i <= LAST_REX_SSE_REG; i++) \
1005 reg_names[i] = ""; \
1009 /* Return number of consecutive hard regs needed starting at reg REGNO
1010 to hold something of mode MODE.
1011 This is ordinarily the length in words of a value of mode MODE
1012 but can be less for certain modes in special long registers.
1014 Actually there are no two word move instructions for consecutive
1015 registers. And only registers 0-3 may have mov byte instructions
1019 #define HARD_REGNO_NREGS(REGNO, MODE) \
1020 (FP_REGNO_P (REGNO) || SSE_REGNO_P (REGNO) || MMX_REGNO_P (REGNO) \
1021 ? (COMPLEX_MODE_P (MODE) ? 2 : 1) \
1022 : ((MODE) == XFmode \
1023 ? (TARGET_64BIT ? 2 : 3) \
1024 : (MODE) == XCmode \
1025 ? (TARGET_64BIT ? 4 : 6) \
1026 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)))
1028 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) \
1029 ((TARGET_128BIT_LONG_DOUBLE && !TARGET_64BIT) \
1030 ? (FP_REGNO_P (REGNO) || SSE_REGNO_P (REGNO) || MMX_REGNO_P (REGNO) \
1032 : ((MODE) == XFmode || (MODE) == XCmode)) \
1035 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) ((MODE) == XFmode ? 4 : 8)
1037 #define VALID_AVX256_REG_MODE(MODE) \
1038 ((MODE) == V32QImode || (MODE) == V16HImode || (MODE) == V8SImode \
1039 || (MODE) == V4DImode || (MODE) == V8SFmode || (MODE) == V4DFmode)
1041 #define VALID_SSE2_REG_MODE(MODE) \
1042 ((MODE) == V16QImode || (MODE) == V8HImode || (MODE) == V2DFmode \
1043 || (MODE) == V2DImode || (MODE) == DFmode)
1045 #define VALID_SSE_REG_MODE(MODE) \
1046 ((MODE) == TImode || (MODE) == V4SFmode || (MODE) == V4SImode \
1047 || (MODE) == SFmode || (MODE) == TFmode)
1049 #define VALID_MMX_REG_MODE_3DNOW(MODE) \
1050 ((MODE) == V2SFmode || (MODE) == SFmode)
1052 #define VALID_MMX_REG_MODE(MODE) \
1053 ((MODE == V1DImode) || (MODE) == DImode \
1054 || (MODE) == V2SImode || (MODE) == SImode \
1055 || (MODE) == V4HImode || (MODE) == V8QImode)
1057 /* ??? No autovectorization into MMX or 3DNOW until we can reliably
1058 place emms and femms instructions.
1059 FIXME: AVX has 32byte floating point vector operations and 16byte
1060 integer vector operations. But vectorizer doesn't support
1061 different sizes for integer and floating point vectors. We limit
1062 vector size to 16byte. */
1063 #define UNITS_PER_SIMD_WORD(MODE) \
1064 (TARGET_AVX ? (((MODE) == DFmode || (MODE) == SFmode) ? 16 : 16) \
1065 : (TARGET_SSE ? 16 : UNITS_PER_WORD))
1067 #define VALID_DFP_MODE_P(MODE) \
1068 ((MODE) == SDmode || (MODE) == DDmode || (MODE) == TDmode)
1070 #define VALID_FP_MODE_P(MODE) \
1071 ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode \
1072 || (MODE) == SCmode || (MODE) == DCmode || (MODE) == XCmode) \
1074 #define VALID_INT_MODE_P(MODE) \
1075 ((MODE) == QImode || (MODE) == HImode || (MODE) == SImode \
1076 || (MODE) == DImode \
1077 || (MODE) == CQImode || (MODE) == CHImode || (MODE) == CSImode \
1078 || (MODE) == CDImode \
1079 || (TARGET_64BIT && ((MODE) == TImode || (MODE) == CTImode \
1080 || (MODE) == TFmode || (MODE) == TCmode)))
1082 /* Return true for modes passed in SSE registers. */
1083 #define SSE_REG_MODE_P(MODE) \
1084 ((MODE) == TImode || (MODE) == V16QImode || (MODE) == TFmode \
1085 || (MODE) == V8HImode || (MODE) == V2DFmode || (MODE) == V2DImode \
1086 || (MODE) == V4SFmode || (MODE) == V4SImode || (MODE) == V32QImode \
1087 || (MODE) == V16HImode || (MODE) == V8SImode || (MODE) == V4DImode \
1088 || (MODE) == V8SFmode || (MODE) == V4DFmode)
1090 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */
1092 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1093 ix86_hard_regno_mode_ok ((REGNO), (MODE))
1095 /* Value is 1 if it is a good idea to tie two pseudo registers
1096 when one has mode MODE1 and one has mode MODE2.
1097 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
1098 for any hard reg, then this must be 0 for correct output. */
1100 #define MODES_TIEABLE_P(MODE1, MODE2) ix86_modes_tieable_p (MODE1, MODE2)
1102 /* It is possible to write patterns to move flags; but until someone
1104 #define AVOID_CCMODE_COPIES
1106 /* Specify the modes required to caller save a given hard regno.
1107 We do this on i386 to prevent flags from being saved at all.
1109 Kill any attempts to combine saving of modes. */
1111 #define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
1112 (CC_REGNO_P (REGNO) ? VOIDmode \
1113 : (MODE) == VOIDmode && (NREGS) != 1 ? VOIDmode \
1114 : (MODE) == VOIDmode ? choose_hard_reg_mode ((REGNO), (NREGS), false) \
1115 : (MODE) == HImode && !TARGET_PARTIAL_REG_STALL ? SImode \
1116 : (MODE) == QImode && (REGNO) > BX_REG && !TARGET_64BIT ? SImode \
1119 /* Specify the registers used for certain standard purposes.
1120 The values of these macros are register numbers. */
1122 /* on the 386 the pc register is %eip, and is not usable as a general
1123 register. The ordinary mov instructions won't work */
1124 /* #define PC_REGNUM */
1126 /* Register to use for pushing function arguments. */
1127 #define STACK_POINTER_REGNUM 7
1129 /* Base register for access to local variables of the function. */
1130 #define HARD_FRAME_POINTER_REGNUM 6
1132 /* Base register for access to local variables of the function. */
1133 #define FRAME_POINTER_REGNUM 20
1135 /* First floating point reg */
1136 #define FIRST_FLOAT_REG 8
1138 /* First & last stack-like regs */
1139 #define FIRST_STACK_REG FIRST_FLOAT_REG
1140 #define LAST_STACK_REG (FIRST_FLOAT_REG + 7)
1142 #define FIRST_SSE_REG (FRAME_POINTER_REGNUM + 1)
1143 #define LAST_SSE_REG (FIRST_SSE_REG + 7)
1145 #define FIRST_MMX_REG (LAST_SSE_REG + 1)
1146 #define LAST_MMX_REG (FIRST_MMX_REG + 7)
1148 #define FIRST_REX_INT_REG (LAST_MMX_REG + 1)
1149 #define LAST_REX_INT_REG (FIRST_REX_INT_REG + 7)
1151 #define FIRST_REX_SSE_REG (LAST_REX_INT_REG + 1)
1152 #define LAST_REX_SSE_REG (FIRST_REX_SSE_REG + 7)
1154 /* Value should be nonzero if functions must have frame pointers.
1155 Zero means the frame pointer need not be set up (and parms
1156 may be accessed via the stack pointer) in functions that seem suitable.
1157 This is computed in `reload', in reload1.c. */
1158 #define FRAME_POINTER_REQUIRED ix86_frame_pointer_required ()
1160 /* Override this in other tm.h files to cope with various OS lossage
1161 requiring a frame pointer. */
1162 #ifndef SUBTARGET_FRAME_POINTER_REQUIRED
1163 #define SUBTARGET_FRAME_POINTER_REQUIRED 0
1166 /* Make sure we can access arbitrary call frames. */
1167 #define SETUP_FRAME_ADDRESSES() ix86_setup_frame_addresses ()
1169 /* Base register for access to arguments of the function. */
1170 #define ARG_POINTER_REGNUM 16
1172 /* Register in which static-chain is passed to a function.
1173 We do use ECX as static chain register for 32 bit ABI. On the
1174 64bit ABI, ECX is an argument register, so we use R10 instead. */
1175 #define STATIC_CHAIN_REGNUM (TARGET_64BIT ? R10_REG : CX_REG)
1177 /* Register to hold the addressing base for position independent
1178 code access to data items. We don't use PIC pointer for 64bit
1179 mode. Define the regnum to dummy value to prevent gcc from
1180 pessimizing code dealing with EBX.
1182 To avoid clobbering a call-saved register unnecessarily, we renumber
1183 the pic register when possible. The change is visible after the
1184 prologue has been emitted. */
1186 #define REAL_PIC_OFFSET_TABLE_REGNUM BX_REG
1188 #define PIC_OFFSET_TABLE_REGNUM \
1189 ((TARGET_64BIT && ix86_cmodel == CM_SMALL_PIC) \
1190 || !flag_pic ? INVALID_REGNUM \
1191 : reload_completed ? REGNO (pic_offset_table_rtx) \
1192 : REAL_PIC_OFFSET_TABLE_REGNUM)
1194 #define GOT_SYMBOL_NAME "_GLOBAL_OFFSET_TABLE_"
1196 /* This is overridden by <cygwin.h>. */
1197 #define MS_AGGREGATE_RETURN 0
1199 /* This is overridden by <netware.h>. */
1200 #define KEEP_AGGREGATE_RETURN_POINTER 0
1202 /* Define the classes of registers for register constraints in the
1203 machine description. Also define ranges of constants.
1205 One of the classes must always be named ALL_REGS and include all hard regs.
1206 If there is more than one class, another class must be named NO_REGS
1207 and contain no registers.
1209 The name GENERAL_REGS must be the name of a class (or an alias for
1210 another name such as ALL_REGS). This is the class of registers
1211 that is allowed by "g" or "r" in a register constraint.
1212 Also, registers outside this class are allocated only when
1213 instructions express preferences for them.
1215 The classes must be numbered in nondecreasing order; that is,
1216 a larger-numbered class must never be contained completely
1217 in a smaller-numbered class.
1219 For any two classes, it is very desirable that there be another
1220 class that represents their union.
1222 It might seem that class BREG is unnecessary, since no useful 386
1223 opcode needs reg %ebx. But some systems pass args to the OS in ebx,
1224 and the "b" register constraint is useful in asms for syscalls.
1226 The flags, fpsr and fpcr registers are in no class. */
1231 AREG, DREG, CREG, BREG, SIREG, DIREG,
1232 AD_REGS, /* %eax/%edx for DImode */
1233 Q_REGS, /* %eax %ebx %ecx %edx */
1234 NON_Q_REGS, /* %esi %edi %ebp %esp */
1235 INDEX_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp */
1236 LEGACY_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp %esp */
1237 GENERAL_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp %esp %r8 - %r15*/
1238 FP_TOP_REG, FP_SECOND_REG, /* %st(0) %st(1) */
1249 ALL_REGS, LIM_REG_CLASSES
1252 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
1254 #define INTEGER_CLASS_P(CLASS) \
1255 reg_class_subset_p ((CLASS), GENERAL_REGS)
1256 #define FLOAT_CLASS_P(CLASS) \
1257 reg_class_subset_p ((CLASS), FLOAT_REGS)
1258 #define SSE_CLASS_P(CLASS) \
1259 reg_class_subset_p ((CLASS), SSE_REGS)
1260 #define MMX_CLASS_P(CLASS) \
1261 ((CLASS) == MMX_REGS)
1262 #define MAYBE_INTEGER_CLASS_P(CLASS) \
1263 reg_classes_intersect_p ((CLASS), GENERAL_REGS)
1264 #define MAYBE_FLOAT_CLASS_P(CLASS) \
1265 reg_classes_intersect_p ((CLASS), FLOAT_REGS)
1266 #define MAYBE_SSE_CLASS_P(CLASS) \
1267 reg_classes_intersect_p (SSE_REGS, (CLASS))
1268 #define MAYBE_MMX_CLASS_P(CLASS) \
1269 reg_classes_intersect_p (MMX_REGS, (CLASS))
1271 #define Q_CLASS_P(CLASS) \
1272 reg_class_subset_p ((CLASS), Q_REGS)
1274 /* Give names of register classes as strings for dump file. */
1276 #define REG_CLASS_NAMES \
1278 "AREG", "DREG", "CREG", "BREG", \
1281 "Q_REGS", "NON_Q_REGS", \
1285 "FP_TOP_REG", "FP_SECOND_REG", \
1290 "FP_TOP_SSE_REGS", \
1291 "FP_SECOND_SSE_REGS", \
1295 "FLOAT_INT_SSE_REGS", \
1298 /* Define which registers fit in which classes.
1299 This is an initializer for a vector of HARD_REG_SET
1300 of length N_REG_CLASSES. */
1302 #define REG_CLASS_CONTENTS \
1304 { 0x01, 0x0 }, { 0x02, 0x0 }, /* AREG, DREG */ \
1305 { 0x04, 0x0 }, { 0x08, 0x0 }, /* CREG, BREG */ \
1306 { 0x10, 0x0 }, { 0x20, 0x0 }, /* SIREG, DIREG */ \
1307 { 0x03, 0x0 }, /* AD_REGS */ \
1308 { 0x0f, 0x0 }, /* Q_REGS */ \
1309 { 0x1100f0, 0x1fe0 }, /* NON_Q_REGS */ \
1310 { 0x7f, 0x1fe0 }, /* INDEX_REGS */ \
1311 { 0x1100ff, 0x0 }, /* LEGACY_REGS */ \
1312 { 0x1100ff, 0x1fe0 }, /* GENERAL_REGS */ \
1313 { 0x100, 0x0 }, { 0x0200, 0x0 },/* FP_TOP_REG, FP_SECOND_REG */\
1314 { 0xff00, 0x0 }, /* FLOAT_REGS */ \
1315 { 0x200000, 0x0 }, /* SSE_FIRST_REG */ \
1316 { 0x1fe00000,0x1fe000 }, /* SSE_REGS */ \
1317 { 0xe0000000, 0x1f }, /* MMX_REGS */ \
1318 { 0x1fe00100,0x1fe000 }, /* FP_TOP_SSE_REG */ \
1319 { 0x1fe00200,0x1fe000 }, /* FP_SECOND_SSE_REG */ \
1320 { 0x1fe0ff00,0x3fe000 }, /* FLOAT_SSE_REGS */ \
1321 { 0x1ffff, 0x1fe0 }, /* FLOAT_INT_REGS */ \
1322 { 0x1fe100ff,0x1fffe0 }, /* INT_SSE_REGS */ \
1323 { 0x1fe1ffff,0x1fffe0 }, /* FLOAT_INT_SSE_REGS */ \
1324 { 0xffffffff,0x1fffff } \
1327 /* The following macro defines cover classes for Integrated Register
1328 Allocator. Cover classes is a set of non-intersected register
1329 classes covering all hard registers used for register allocation
1330 purpose. Any move between two registers of a cover class should be
1331 cheaper than load or store of the registers. The macro value is
1332 array of register classes with LIM_REG_CLASSES used as the end
1335 #define IRA_COVER_CLASSES \
1337 GENERAL_REGS, FLOAT_REGS, MMX_REGS, SSE_REGS, LIM_REG_CLASSES \
1340 /* The same information, inverted:
1341 Return the class number of the smallest class containing
1342 reg number REGNO. This could be a conditional expression
1343 or could index an array. */
1345 #define REGNO_REG_CLASS(REGNO) (regclass_map[REGNO])
1347 /* When defined, the compiler allows registers explicitly used in the
1348 rtl to be used as spill registers but prevents the compiler from
1349 extending the lifetime of these registers. */
1351 #define SMALL_REGISTER_CLASSES 1
1353 #define QI_REG_P(X) (REG_P (X) && REGNO (X) <= BX_REG)
1355 #define GENERAL_REGNO_P(N) \
1356 ((N) <= STACK_POINTER_REGNUM || REX_INT_REGNO_P (N))
1358 #define GENERAL_REG_P(X) \
1359 (REG_P (X) && GENERAL_REGNO_P (REGNO (X)))
1361 #define ANY_QI_REG_P(X) (TARGET_64BIT ? GENERAL_REG_P(X) : QI_REG_P (X))
1363 #define REX_INT_REGNO_P(N) \
1364 IN_RANGE ((N), FIRST_REX_INT_REG, LAST_REX_INT_REG)
1365 #define REX_INT_REG_P(X) (REG_P (X) && REX_INT_REGNO_P (REGNO (X)))
1367 #define FP_REG_P(X) (REG_P (X) && FP_REGNO_P (REGNO (X)))
1368 #define FP_REGNO_P(N) IN_RANGE ((N), FIRST_STACK_REG, LAST_STACK_REG)
1369 #define ANY_FP_REG_P(X) (REG_P (X) && ANY_FP_REGNO_P (REGNO (X)))
1370 #define ANY_FP_REGNO_P(N) (FP_REGNO_P (N) || SSE_REGNO_P (N))
1372 #define X87_FLOAT_MODE_P(MODE) \
1373 (TARGET_80387 && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode))
1375 #define SSE_REG_P(N) (REG_P (N) && SSE_REGNO_P (REGNO (N)))
1376 #define SSE_REGNO_P(N) \
1377 (IN_RANGE ((N), FIRST_SSE_REG, LAST_SSE_REG) \
1378 || REX_SSE_REGNO_P (N))
1380 #define REX_SSE_REGNO_P(N) \
1381 IN_RANGE ((N), FIRST_REX_SSE_REG, LAST_REX_SSE_REG)
1383 #define SSE_REGNO(N) \
1384 ((N) < 8 ? FIRST_SSE_REG + (N) : FIRST_REX_SSE_REG + (N) - 8)
1386 #define SSE_FLOAT_MODE_P(MODE) \
1387 ((TARGET_SSE && (MODE) == SFmode) || (TARGET_SSE2 && (MODE) == DFmode))
1389 #define SSE_VEC_FLOAT_MODE_P(MODE) \
1390 ((TARGET_SSE && (MODE) == V4SFmode) || (TARGET_SSE2 && (MODE) == V2DFmode))
1392 #define AVX_FLOAT_MODE_P(MODE) \
1393 (TARGET_AVX && ((MODE) == SFmode || (MODE) == DFmode))
1395 #define AVX128_VEC_FLOAT_MODE_P(MODE) \
1396 (TARGET_AVX && ((MODE) == V4SFmode || (MODE) == V2DFmode))
1398 #define AVX256_VEC_FLOAT_MODE_P(MODE) \
1399 (TARGET_AVX && ((MODE) == V8SFmode || (MODE) == V4DFmode))
1401 #define AVX_VEC_FLOAT_MODE_P(MODE) \
1402 (TARGET_AVX && ((MODE) == V4SFmode || (MODE) == V2DFmode \
1403 || (MODE) == V8SFmode || (MODE) == V4DFmode))
1405 #define MMX_REG_P(XOP) (REG_P (XOP) && MMX_REGNO_P (REGNO (XOP)))
1406 #define MMX_REGNO_P(N) IN_RANGE ((N), FIRST_MMX_REG, LAST_MMX_REG)
1408 #define STACK_REG_P(XOP) (REG_P (XOP) && STACK_REGNO_P (REGNO (XOP)))
1409 #define STACK_REGNO_P(N) IN_RANGE ((N), FIRST_STACK_REG, LAST_STACK_REG)
1411 #define STACK_TOP_P(XOP) (REG_P (XOP) && REGNO (XOP) == FIRST_STACK_REG)
1413 #define CC_REG_P(X) (REG_P (X) && CC_REGNO_P (REGNO (X)))
1414 #define CC_REGNO_P(X) ((X) == FLAGS_REG || (X) == FPSR_REG)
1416 /* The class value for index registers, and the one for base regs. */
1418 #define INDEX_REG_CLASS INDEX_REGS
1419 #define BASE_REG_CLASS GENERAL_REGS
1421 /* Place additional restrictions on the register class to use when it
1422 is necessary to be able to hold a value of mode MODE in a reload
1423 register for which class CLASS would ordinarily be used. */
1425 #define LIMIT_RELOAD_CLASS(MODE, CLASS) \
1426 ((MODE) == QImode && !TARGET_64BIT \
1427 && ((CLASS) == ALL_REGS || (CLASS) == GENERAL_REGS \
1428 || (CLASS) == LEGACY_REGS || (CLASS) == INDEX_REGS) \
1431 /* Given an rtx X being reloaded into a reg required to be
1432 in class CLASS, return the class of reg to actually use.
1433 In general this is just CLASS; but on some machines
1434 in some cases it is preferable to use a more restrictive class.
1435 On the 80386 series, we prevent floating constants from being
1436 reloaded into floating registers (since no move-insn can do that)
1437 and we ensure that QImodes aren't reloaded into the esi or edi reg. */
1439 /* Put float CONST_DOUBLE in the constant pool instead of fp regs.
1440 QImode must go into class Q_REGS.
1441 Narrow ALL_REGS to GENERAL_REGS. This supports allowing movsf and
1442 movdf to do mem-to-mem moves through integer regs. */
1444 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
1445 ix86_preferred_reload_class ((X), (CLASS))
1447 /* Discourage putting floating-point values in SSE registers unless
1448 SSE math is being used, and likewise for the 387 registers. */
1450 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
1451 ix86_preferred_output_reload_class ((X), (CLASS))
1453 /* If we are copying between general and FP registers, we need a memory
1454 location. The same is true for SSE and MMX registers. */
1455 #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \
1456 ix86_secondary_memory_needed ((CLASS1), (CLASS2), (MODE), 1)
1458 /* Get_secondary_mem widens integral modes to BITS_PER_WORD.
1459 There is no need to emit full 64 bit move on 64 bit targets
1460 for integral modes that can be moved using 32 bit move. */
1461 #define SECONDARY_MEMORY_NEEDED_MODE(MODE) \
1462 (GET_MODE_BITSIZE (MODE) < 32 && INTEGRAL_MODE_P (MODE) \
1463 ? mode_for_size (32, GET_MODE_CLASS (MODE), 0) \
1466 /* Return the maximum number of consecutive registers
1467 needed to represent mode MODE in a register of class CLASS. */
1468 /* On the 80386, this is the size of MODE in words,
1469 except in the FP regs, where a single reg is always enough. */
1470 #define CLASS_MAX_NREGS(CLASS, MODE) \
1471 (!MAYBE_INTEGER_CLASS_P (CLASS) \
1472 ? (COMPLEX_MODE_P (MODE) ? 2 : 1) \
1473 : (((((MODE) == XFmode ? 12 : GET_MODE_SIZE (MODE))) \
1474 + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
1476 /* A C expression whose value is nonzero if pseudos that have been
1477 assigned to registers of class CLASS would likely be spilled
1478 because registers of CLASS are needed for spill registers.
1480 The default value of this macro returns 1 if CLASS has exactly one
1481 register and zero otherwise. On most machines, this default
1482 should be used. Only define this macro to some other expression
1483 if pseudo allocated by `local-alloc.c' end up in memory because
1484 their hard registers were needed for spill registers. If this
1485 macro returns nonzero for those classes, those pseudos will only
1486 be allocated by `global.c', which knows how to reallocate the
1487 pseudo to another register. If there would not be another
1488 register available for reallocation, you should not change the
1489 definition of this macro since the only effect of such a
1490 definition would be to slow down register allocation. */
1492 #define CLASS_LIKELY_SPILLED_P(CLASS) \
1493 (((CLASS) == AREG) \
1494 || ((CLASS) == DREG) \
1495 || ((CLASS) == CREG) \
1496 || ((CLASS) == BREG) \
1497 || ((CLASS) == AD_REGS) \
1498 || ((CLASS) == SIREG) \
1499 || ((CLASS) == DIREG) \
1500 || ((CLASS) == FP_TOP_REG) \
1501 || ((CLASS) == FP_SECOND_REG))
1503 /* Return a class of registers that cannot change FROM mode to TO mode. */
1505 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1506 ix86_cannot_change_mode_class (FROM, TO, CLASS)
1508 /* Stack layout; function entry, exit and calling. */
1510 /* Define this if pushing a word on the stack
1511 makes the stack pointer a smaller address. */
1512 #define STACK_GROWS_DOWNWARD
1514 /* Define this to nonzero if the nominal address of the stack frame
1515 is at the high-address end of the local variables;
1516 that is, each additional local variable allocated
1517 goes at a more negative offset in the frame. */
1518 #define FRAME_GROWS_DOWNWARD 1
1520 /* Offset within stack frame to start allocating local variables at.
1521 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
1522 first local allocated. Otherwise, it is the offset to the BEGINNING
1523 of the first local allocated. */
1524 #define STARTING_FRAME_OFFSET 0
1526 /* If we generate an insn to push BYTES bytes,
1527 this says how many the stack pointer really advances by.
1528 On 386, we have pushw instruction that decrements by exactly 2 no
1529 matter what the position was, there is no pushb.
1530 But as CIE data alignment factor on this arch is -4, we need to make
1531 sure all stack pointer adjustments are in multiple of 4.
1533 For 64bit ABI we round up to 8 bytes.
1536 #define PUSH_ROUNDING(BYTES) \
1538 ? (((BYTES) + 7) & (-8)) \
1539 : (((BYTES) + 3) & (-4)))
1541 /* If defined, the maximum amount of space required for outgoing arguments will
1542 be computed and placed into the variable
1543 `crtl->outgoing_args_size'. No space will be pushed onto the
1544 stack for each call; instead, the function prologue should increase the stack
1545 frame size by this amount.
1547 MS ABI seem to require 16 byte alignment everywhere except for function
1548 prologue and apilogue. This is not possible without
1549 ACCUMULATE_OUTGOING_ARGS. */
1551 #define ACCUMULATE_OUTGOING_ARGS \
1552 (TARGET_ACCUMULATE_OUTGOING_ARGS || ix86_cfun_abi () == MS_ABI)
1554 /* If defined, a C expression whose value is nonzero when we want to use PUSH
1555 instructions to pass outgoing arguments. */
1557 #define PUSH_ARGS (TARGET_PUSH_ARGS && !ACCUMULATE_OUTGOING_ARGS)
1559 /* We want the stack and args grow in opposite directions, even if
1561 #define PUSH_ARGS_REVERSED 1
1563 /* Offset of first parameter from the argument pointer register value. */
1564 #define FIRST_PARM_OFFSET(FNDECL) 0
1566 /* Define this macro if functions should assume that stack space has been
1567 allocated for arguments even when their values are passed in registers.
1569 The value of this macro is the size, in bytes, of the area reserved for
1570 arguments passed in registers for the function represented by FNDECL.
1572 This space can be allocated by the caller, or be a part of the
1573 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
1575 #define REG_PARM_STACK_SPACE(FNDECL) ix86_reg_parm_stack_space (FNDECL)
1577 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) \
1578 (ix86_function_type_abi (FNTYPE) == MS_ABI)
1580 /* Value is the number of bytes of arguments automatically
1581 popped when returning from a subroutine call.
1582 FUNDECL is the declaration node of the function (as a tree),
1583 FUNTYPE is the data type of the function (as a tree),
1584 or for a library call it is an identifier node for the subroutine name.
1585 SIZE is the number of bytes of arguments passed on the stack.
1587 On the 80386, the RTD insn may be used to pop them if the number
1588 of args is fixed, but if the number is variable then the caller
1589 must pop them all. RTD can't be used for library calls now
1590 because the library is compiled with the Unix compiler.
1591 Use of RTD is a selectable option, since it is incompatible with
1592 standard Unix calling sequences. If the option is not selected,
1593 the caller must always pop the args.
1595 The attribute stdcall is equivalent to RTD on a per module basis. */
1597 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) \
1598 ix86_return_pops_args ((FUNDECL), (FUNTYPE), (SIZE))
1600 #define FUNCTION_VALUE_REGNO_P(N) ix86_function_value_regno_p (N)
1602 /* Define how to find the value returned by a library function
1603 assuming the value has mode MODE. */
1605 #define LIBCALL_VALUE(MODE) ix86_libcall_value (MODE)
1607 /* Define the size of the result block used for communication between
1608 untyped_call and untyped_return. The block contains a DImode value
1609 followed by the block used by fnsave and frstor. */
1611 #define APPLY_RESULT_SIZE (8+108)
1613 /* 1 if N is a possible register number for function argument passing. */
1614 #define FUNCTION_ARG_REGNO_P(N) ix86_function_arg_regno_p (N)
1616 /* Define a data type for recording info about an argument list
1617 during the scan of that argument list. This data type should
1618 hold all necessary information about the function itself
1619 and about the args processed so far, enough to enable macros
1620 such as FUNCTION_ARG to determine where the next arg should go. */
1622 typedef struct ix86_args {
1623 int words; /* # words passed so far */
1624 int nregs; /* # registers available for passing */
1625 int regno; /* next available register number */
1626 int fastcall; /* fastcall calling convention is used */
1627 int sse_words; /* # sse words passed so far */
1628 int sse_nregs; /* # sse registers available for passing */
1629 int warn_avx; /* True when we want to warn about AVX ABI. */
1630 int warn_sse; /* True when we want to warn about SSE ABI. */
1631 int warn_mmx; /* True when we want to warn about MMX ABI. */
1632 int sse_regno; /* next available sse register number */
1633 int mmx_words; /* # mmx words passed so far */
1634 int mmx_nregs; /* # mmx registers available for passing */
1635 int mmx_regno; /* next available mmx register number */
1636 int maybe_vaarg; /* true for calls to possibly vardic fncts. */
1637 int float_in_sse; /* 1 if in 32-bit mode SFmode (2 for DFmode) should
1638 be passed in SSE registers. Otherwise 0. */
1639 enum calling_abi call_abi; /* Set to SYSV_ABI for sysv abi. Otherwise
1640 MS_ABI for ms abi. */
1643 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1644 for a call to a function whose data type is FNTYPE.
1645 For a library call, FNTYPE is 0. */
1647 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
1648 init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (FNDECL))
1650 /* Update the data in CUM to advance over an argument
1651 of mode MODE and data type TYPE.
1652 (TYPE is null for libcalls where that information may not be available.) */
1654 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1655 function_arg_advance (&(CUM), (MODE), (TYPE), (NAMED))
1657 /* Define where to put the arguments to a function.
1658 Value is zero to push the argument on the stack,
1659 or a hard register in which to store the argument.
1661 MODE is the argument's machine mode.
1662 TYPE is the data type of the argument (as a tree).
1663 This is null for libcalls where that information may
1665 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1666 the preceding args and about the function being called.
1667 NAMED is nonzero if this argument is a named parameter
1668 (otherwise it is an extra parameter matching an ellipsis). */
1670 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1671 function_arg (&(CUM), (MODE), (TYPE), (NAMED))
1673 #define TARGET_ASM_FILE_END ix86_file_end
1674 #define NEED_INDICATE_EXEC_STACK 0
1676 /* Output assembler code to FILE to increment profiler label # LABELNO
1677 for profiling a function entry. */
1679 #define FUNCTION_PROFILER(FILE, LABELNO) x86_function_profiler (FILE, LABELNO)
1681 #define MCOUNT_NAME "_mcount"
1683 #define PROFILE_COUNT_REGISTER "edx"
1685 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1686 the stack pointer does not matter. The value is tested only in
1687 functions that have frame pointers.
1688 No definition is equivalent to always zero. */
1689 /* Note on the 386 it might be more efficient not to define this since
1690 we have to restore it ourselves from the frame pointer, in order to
1693 #define EXIT_IGNORE_STACK 1
1695 /* Output assembler code for a block containing the constant parts
1696 of a trampoline, leaving space for the variable parts. */
1698 /* On the 386, the trampoline contains two instructions:
1701 The trampoline is generated entirely at runtime. The operand of JMP
1702 is the address of FUNCTION relative to the instruction following the
1703 JMP (which is 5 bytes long). */
1705 /* Length in units of the trampoline for entering a nested function. */
1707 #define TRAMPOLINE_SIZE (TARGET_64BIT ? 23 : 10)
1709 /* Emit RTL insns to initialize the variable parts of a trampoline.
1710 FNADDR is an RTX for the address of the function's pure code.
1711 CXT is an RTX for the static chain value for the function. */
1713 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
1714 x86_initialize_trampoline ((TRAMP), (FNADDR), (CXT))
1716 /* Definitions for register eliminations.
1718 This is an array of structures. Each structure initializes one pair
1719 of eliminable registers. The "from" register number is given first,
1720 followed by "to". Eliminations of the same "from" register are listed
1721 in order of preference.
1723 There are two registers that can always be eliminated on the i386.
1724 The frame pointer and the arg pointer can be replaced by either the
1725 hard frame pointer or to the stack pointer, depending upon the
1726 circumstances. The hard frame pointer is not used before reload and
1727 so it is not eligible for elimination. */
1729 #define ELIMINABLE_REGS \
1730 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1731 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1732 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1733 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} \
1735 /* Given FROM and TO register numbers, say whether this elimination is
1738 #define CAN_ELIMINATE(FROM, TO) ix86_can_eliminate ((FROM), (TO))
1740 /* Define the offset between two registers, one to be eliminated, and the other
1741 its replacement, at the start of a routine. */
1743 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1744 ((OFFSET) = ix86_initial_elimination_offset ((FROM), (TO)))
1746 /* Addressing modes, and classification of registers for them. */
1748 /* Macros to check register numbers against specific register classes. */
1750 /* These assume that REGNO is a hard or pseudo reg number.
1751 They give nonzero only if REGNO is a hard reg of the suitable class
1752 or a pseudo reg currently allocated to a suitable hard reg.
1753 Since they use reg_renumber, they are safe only once reg_renumber
1754 has been allocated, which happens in local-alloc.c. */
1756 #define REGNO_OK_FOR_INDEX_P(REGNO) \
1757 ((REGNO) < STACK_POINTER_REGNUM \
1758 || REX_INT_REGNO_P (REGNO) \
1759 || (unsigned) reg_renumber[(REGNO)] < STACK_POINTER_REGNUM \
1760 || REX_INT_REGNO_P ((unsigned) reg_renumber[(REGNO)]))
1762 #define REGNO_OK_FOR_BASE_P(REGNO) \
1763 (GENERAL_REGNO_P (REGNO) \
1764 || (REGNO) == ARG_POINTER_REGNUM \
1765 || (REGNO) == FRAME_POINTER_REGNUM \
1766 || GENERAL_REGNO_P ((unsigned) reg_renumber[(REGNO)]))
1768 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
1769 and check its validity for a certain class.
1770 We have two alternate definitions for each of them.
1771 The usual definition accepts all pseudo regs; the other rejects
1772 them unless they have been allocated suitable hard regs.
1773 The symbol REG_OK_STRICT causes the latter definition to be used.
1775 Most source files want to accept pseudo regs in the hope that
1776 they will get allocated to the class that the insn wants them to be in.
1777 Source files for reload pass need to be strict.
1778 After reload, it makes no difference, since pseudo regs have
1779 been eliminated by then. */
1782 /* Non strict versions, pseudos are ok. */
1783 #define REG_OK_FOR_INDEX_NONSTRICT_P(X) \
1784 (REGNO (X) < STACK_POINTER_REGNUM \
1785 || REX_INT_REGNO_P (REGNO (X)) \
1786 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
1788 #define REG_OK_FOR_BASE_NONSTRICT_P(X) \
1789 (GENERAL_REGNO_P (REGNO (X)) \
1790 || REGNO (X) == ARG_POINTER_REGNUM \
1791 || REGNO (X) == FRAME_POINTER_REGNUM \
1792 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
1794 /* Strict versions, hard registers only */
1795 #define REG_OK_FOR_INDEX_STRICT_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
1796 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1798 #ifndef REG_OK_STRICT
1799 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_NONSTRICT_P (X)
1800 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NONSTRICT_P (X)
1803 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_STRICT_P (X)
1804 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
1807 /* TARGET_LEGITIMATE_ADDRESS_P recognizes an RTL expression
1808 that is a valid memory address for an instruction.
1809 The MODE argument is the machine mode for the MEM expression
1810 that wants to use this address.
1812 The other macros defined here are used only in TARGET_LEGITIMATE_ADDRESS_P,
1813 except for CONSTANT_ADDRESS_P which is usually machine-independent.
1815 See legitimize_pic_address in i386.c for details as to what
1816 constitutes a legitimate address when -fpic is used. */
1818 #define MAX_REGS_PER_ADDRESS 2
1820 #define CONSTANT_ADDRESS_P(X) constant_address_p (X)
1822 /* Nonzero if the constant value X is a legitimate general operand.
1823 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
1825 #define LEGITIMATE_CONSTANT_P(X) legitimate_constant_p (X)
1827 /* If defined, a C expression to determine the base term of address X.
1828 This macro is used in only one place: `find_base_term' in alias.c.
1830 It is always safe for this macro to not be defined. It exists so
1831 that alias analysis can understand machine-dependent addresses.
1833 The typical use of this macro is to handle addresses containing
1834 a label_ref or symbol_ref within an UNSPEC. */
1836 #define FIND_BASE_TERM(X) ix86_find_base_term (X)
1838 /* Nonzero if the constant value X is a legitimate general operand
1839 when generating PIC code. It is given that flag_pic is on and
1840 that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
1842 #define LEGITIMATE_PIC_OPERAND_P(X) legitimate_pic_operand_p (X)
1844 #define SYMBOLIC_CONST(X) \
1845 (GET_CODE (X) == SYMBOL_REF \
1846 || GET_CODE (X) == LABEL_REF \
1847 || (GET_CODE (X) == CONST && symbolic_reference_mentioned_p (X)))
1849 /* Max number of args passed in registers. If this is more than 3, we will
1850 have problems with ebx (register #4), since it is a caller save register and
1851 is also used as the pic register in ELF. So for now, don't allow more than
1852 3 registers to be passed in registers. */
1854 /* Abi specific values for REGPARM_MAX and SSE_REGPARM_MAX */
1855 #define X86_64_REGPARM_MAX 6
1856 #define X86_64_MS_REGPARM_MAX 4
1858 #define X86_32_REGPARM_MAX 3
1860 #define REGPARM_MAX \
1861 (TARGET_64BIT ? (TARGET_64BIT_MS_ABI ? X86_64_MS_REGPARM_MAX \
1862 : X86_64_REGPARM_MAX) \
1863 : X86_32_REGPARM_MAX)
1865 #define X86_64_SSE_REGPARM_MAX 8
1866 #define X86_64_MS_SSE_REGPARM_MAX 4
1868 #define X86_32_SSE_REGPARM_MAX (TARGET_SSE ? 3 : 0)
1870 #define SSE_REGPARM_MAX \
1871 (TARGET_64BIT ? (TARGET_64BIT_MS_ABI ? X86_64_MS_SSE_REGPARM_MAX \
1872 : X86_64_SSE_REGPARM_MAX) \
1873 : X86_32_SSE_REGPARM_MAX)
1875 #define MMX_REGPARM_MAX (TARGET_64BIT ? 0 : (TARGET_MMX ? 3 : 0))
1878 /* Specify the machine mode that this machine uses
1879 for the index in the tablejump instruction. */
1880 #define CASE_VECTOR_MODE \
1881 (!TARGET_64BIT || (flag_pic && ix86_cmodel != CM_LARGE_PIC) ? SImode : DImode)
1883 /* Define this as 1 if `char' should by default be signed; else as 0. */
1884 #define DEFAULT_SIGNED_CHAR 1
1886 /* Max number of bytes we can move from memory to memory
1887 in one reasonably fast instruction. */
1890 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1891 move efficiently, as opposed to MOVE_MAX which is the maximum
1892 number of bytes we can move with a single instruction. */
1893 #define MOVE_MAX_PIECES (TARGET_64BIT ? 8 : 4)
1895 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1896 move-instruction pairs, we will do a movmem or libcall instead.
1897 Increasing the value will always make code faster, but eventually
1898 incurs high cost in increased code size.
1900 If you don't define this, a reasonable default is used. */
1902 #define MOVE_RATIO(speed) ((speed) ? ix86_cost->move_ratio : 3)
1904 /* If a clear memory operation would take CLEAR_RATIO or more simple
1905 move-instruction sequences, we will do a clrmem or libcall instead. */
1907 #define CLEAR_RATIO(speed) ((speed) ? MIN (6, ix86_cost->move_ratio) : 2)
1909 /* Define if shifts truncate the shift count
1910 which implies one can omit a sign-extension or zero-extension
1911 of a shift count. */
1912 /* On i386, shifts do truncate the count. But bit opcodes don't. */
1914 /* #define SHIFT_COUNT_TRUNCATED */
1916 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1917 is done just by pretending it is already truncated. */
1918 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1920 /* A macro to update M and UNSIGNEDP when an object whose type is
1921 TYPE and which has the specified mode and signedness is to be
1922 stored in a register. This macro is only called when TYPE is a
1925 On i386 it is sometimes useful to promote HImode and QImode
1926 quantities to SImode. The choice depends on target type. */
1928 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
1930 if (((MODE) == HImode && TARGET_PROMOTE_HI_REGS) \
1931 || ((MODE) == QImode && TARGET_PROMOTE_QI_REGS)) \
1935 /* Specify the machine mode that pointers have.
1936 After generation of rtl, the compiler makes no further distinction
1937 between pointers and any other objects of this machine mode. */
1938 #define Pmode (TARGET_64BIT ? DImode : SImode)
1940 /* A function address in a call instruction
1941 is a byte address (for indexing purposes)
1942 so give the MEM rtx a byte's mode. */
1943 #define FUNCTION_MODE QImode
1945 /* A C expression for the cost of moving data from a register in class FROM to
1946 one in class TO. The classes are expressed using the enumeration values
1947 such as `GENERAL_REGS'. A value of 2 is the default; other values are
1948 interpreted relative to that.
1950 It is not required that the cost always equal 2 when FROM is the same as TO;
1951 on some machines it is expensive to move between registers if they are not
1952 general registers. */
1954 #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \
1955 ix86_register_move_cost ((MODE), (CLASS1), (CLASS2))
1957 /* A C expression for the cost of moving data of mode M between a
1958 register and memory. A value of 2 is the default; this cost is
1959 relative to those in `REGISTER_MOVE_COST'.
1961 If moving between registers and memory is more expensive than
1962 between two registers, you should define this macro to express the
1965 #define MEMORY_MOVE_COST(MODE, CLASS, IN) \
1966 ix86_memory_move_cost ((MODE), (CLASS), (IN))
1968 /* A C expression for the cost of a branch instruction. A value of 1
1969 is the default; other values are interpreted relative to that. */
1971 #define BRANCH_COST(speed_p, predictable_p) \
1972 (!(speed_p) ? 2 : (predictable_p) ? 0 : ix86_branch_cost)
1974 /* Define this macro as a C expression which is nonzero if accessing
1975 less than a word of memory (i.e. a `char' or a `short') is no
1976 faster than accessing a word of memory, i.e., if such access
1977 require more than one instruction or if there is no difference in
1978 cost between byte and (aligned) word loads.
1980 When this macro is not defined, the compiler will access a field by
1981 finding the smallest containing object; when it is defined, a
1982 fullword load will be used if alignment permits. Unless bytes
1983 accesses are faster than word accesses, using word accesses is
1984 preferable since it may eliminate subsequent memory access if
1985 subsequent accesses occur to other fields in the same word of the
1986 structure, but to different bytes. */
1988 #define SLOW_BYTE_ACCESS 0
1990 /* Nonzero if access to memory by shorts is slow and undesirable. */
1991 #define SLOW_SHORT_ACCESS 0
1993 /* Define this macro to be the value 1 if unaligned accesses have a
1994 cost many times greater than aligned accesses, for example if they
1995 are emulated in a trap handler.
1997 When this macro is nonzero, the compiler will act as if
1998 `STRICT_ALIGNMENT' were nonzero when generating code for block
1999 moves. This can cause significantly more instructions to be
2000 produced. Therefore, do not set this macro nonzero if unaligned
2001 accesses only add a cycle or two to the time for a memory access.
2003 If the value of this macro is always zero, it need not be defined. */
2005 /* #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 0 */
2007 /* Define this macro if it is as good or better to call a constant
2008 function address than to call an address kept in a register.
2010 Desirable on the 386 because a CALL with a constant address is
2011 faster than one with a register address. */
2013 #define NO_FUNCTION_CSE
2015 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
2016 return the mode to be used for the comparison.
2018 For floating-point equality comparisons, CCFPEQmode should be used.
2019 VOIDmode should be used in all other cases.
2021 For integer comparisons against zero, reduce to CCNOmode or CCZmode if
2022 possible, to allow for more combinations. */
2024 #define SELECT_CC_MODE(OP, X, Y) ix86_cc_mode ((OP), (X), (Y))
2026 /* Return nonzero if MODE implies a floating point inequality can be
2029 #define REVERSIBLE_CC_MODE(MODE) 1
2031 /* A C expression whose value is reversed condition code of the CODE for
2032 comparison done in CC_MODE mode. */
2033 #define REVERSE_CONDITION(CODE, MODE) ix86_reverse_condition ((CODE), (MODE))
2036 /* Control the assembler format that we output, to the extent
2037 this does not vary between assemblers. */
2039 /* How to refer to registers in assembler output.
2040 This sequence is indexed by compiler's hard-register-number (see above). */
2042 /* In order to refer to the first 8 regs as 32-bit regs, prefix an "e".
2043 For non floating point regs, the following are the HImode names.
2045 For float regs, the stack top is sometimes referred to as "%st(0)"
2046 instead of just "%st". PRINT_OPERAND handles this with the "y" code. */
2048 #define HI_REGISTER_NAMES \
2049 {"ax","dx","cx","bx","si","di","bp","sp", \
2050 "st","st(1)","st(2)","st(3)","st(4)","st(5)","st(6)","st(7)", \
2051 "argp", "flags", "fpsr", "fpcr", "frame", \
2052 "xmm0","xmm1","xmm2","xmm3","xmm4","xmm5","xmm6","xmm7", \
2053 "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7", \
2054 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
2055 "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15"}
2057 #define REGISTER_NAMES HI_REGISTER_NAMES
2059 /* Table of additional register names to use in user input. */
2061 #define ADDITIONAL_REGISTER_NAMES \
2062 { { "eax", 0 }, { "edx", 1 }, { "ecx", 2 }, { "ebx", 3 }, \
2063 { "esi", 4 }, { "edi", 5 }, { "ebp", 6 }, { "esp", 7 }, \
2064 { "rax", 0 }, { "rdx", 1 }, { "rcx", 2 }, { "rbx", 3 }, \
2065 { "rsi", 4 }, { "rdi", 5 }, { "rbp", 6 }, { "rsp", 7 }, \
2066 { "al", 0 }, { "dl", 1 }, { "cl", 2 }, { "bl", 3 }, \
2067 { "ah", 0 }, { "dh", 1 }, { "ch", 2 }, { "bh", 3 } }
2069 /* Note we are omitting these since currently I don't know how
2070 to get gcc to use these, since they want the same but different
2071 number as al, and ax.
2074 #define QI_REGISTER_NAMES \
2075 {"al", "dl", "cl", "bl", "sil", "dil", "bpl", "spl",}
2077 /* These parallel the array above, and can be used to access bits 8:15
2078 of regs 0 through 3. */
2080 #define QI_HIGH_REGISTER_NAMES \
2081 {"ah", "dh", "ch", "bh", }
2083 /* How to renumber registers for dbx and gdb. */
2085 #define DBX_REGISTER_NUMBER(N) \
2086 (TARGET_64BIT ? dbx64_register_map[(N)] : dbx_register_map[(N)])
2088 extern int const dbx_register_map[FIRST_PSEUDO_REGISTER];
2089 extern int const dbx64_register_map[FIRST_PSEUDO_REGISTER];
2090 extern int const svr4_dbx_register_map[FIRST_PSEUDO_REGISTER];
2092 /* Before the prologue, RA is at 0(%esp). */
2093 #define INCOMING_RETURN_ADDR_RTX \
2094 gen_rtx_MEM (VOIDmode, gen_rtx_REG (VOIDmode, STACK_POINTER_REGNUM))
2096 /* After the prologue, RA is at -4(AP) in the current frame. */
2097 #define RETURN_ADDR_RTX(COUNT, FRAME) \
2099 ? gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, -UNITS_PER_WORD)) \
2100 : gen_rtx_MEM (Pmode, plus_constant (FRAME, UNITS_PER_WORD)))
2102 /* PC is dbx register 8; let's use that column for RA. */
2103 #define DWARF_FRAME_RETURN_COLUMN (TARGET_64BIT ? 16 : 8)
2105 /* Before the prologue, the top of the frame is at 4(%esp). */
2106 #define INCOMING_FRAME_SP_OFFSET UNITS_PER_WORD
2108 /* Describe how we implement __builtin_eh_return. */
2109 #define EH_RETURN_DATA_REGNO(N) ((N) < 2 ? (N) : INVALID_REGNUM)
2110 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 2)
2113 /* Select a format to encode pointers in exception handling data. CODE
2114 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
2115 true if the symbol may be affected by dynamic relocations.
2117 ??? All x86 object file formats are capable of representing this.
2118 After all, the relocation needed is the same as for the call insn.
2119 Whether or not a particular assembler allows us to enter such, I
2120 guess we'll have to see. */
2121 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
2122 asm_preferred_eh_data_format ((CODE), (GLOBAL))
2124 /* This is how to output an insn to push a register on the stack.
2125 It need not be very fast code. */
2127 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \
2130 asm_fprintf ((FILE), "\tpush{q}\t%%r%s\n", \
2131 reg_names[(REGNO)] + (REX_INT_REGNO_P (REGNO) != 0)); \
2133 asm_fprintf ((FILE), "\tpush{l}\t%%e%s\n", reg_names[(REGNO)]); \
2136 /* This is how to output an insn to pop a register from the stack.
2137 It need not be very fast code. */
2139 #define ASM_OUTPUT_REG_POP(FILE, REGNO) \
2142 asm_fprintf ((FILE), "\tpop{q}\t%%r%s\n", \
2143 reg_names[(REGNO)] + (REX_INT_REGNO_P (REGNO) != 0)); \
2145 asm_fprintf ((FILE), "\tpop{l}\t%%e%s\n", reg_names[(REGNO)]); \
2148 /* This is how to output an element of a case-vector that is absolute. */
2150 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
2151 ix86_output_addr_vec_elt ((FILE), (VALUE))
2153 /* This is how to output an element of a case-vector that is relative. */
2155 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
2156 ix86_output_addr_diff_elt ((FILE), (VALUE), (REL))
2158 /* When we see %v, we will print the 'v' prefix if TARGET_AVX is
2161 #define ASM_OUTPUT_AVX_PREFIX(STREAM, PTR) \
2163 if ((PTR)[0] == '%' && (PTR)[1] == 'v') \
2172 /* A C statement or statements which output an assembler instruction
2173 opcode to the stdio stream STREAM. The macro-operand PTR is a
2174 variable of type `char *' which points to the opcode name in
2175 its "internal" form--the form that is written in the machine
2178 #define ASM_OUTPUT_OPCODE(STREAM, PTR) \
2179 ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR))
2181 /* A C statement to output to the stdio stream FILE an assembler
2182 command to pad the location counter to a multiple of 1<<LOG
2183 bytes if it is within MAX_SKIP bytes. */
2185 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
2186 #undef ASM_OUTPUT_MAX_SKIP_PAD
2187 #define ASM_OUTPUT_MAX_SKIP_PAD(FILE, LOG, MAX_SKIP) \
2190 if ((MAX_SKIP) == 0) \
2191 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
2193 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
2197 /* Under some conditions we need jump tables in the text section,
2198 because the assembler cannot handle label differences between
2199 sections. This is the case for x86_64 on Mach-O for example. */
2201 #define JUMP_TABLES_IN_TEXT_SECTION \
2202 (flag_pic && ((TARGET_MACHO && TARGET_64BIT) \
2203 || (!TARGET_64BIT && !HAVE_AS_GOTOFF_IN_DATA)))
2205 /* Switch to init or fini section via SECTION_OP, emit a call to FUNC,
2206 and switch back. For x86 we do this only to save a few bytes that
2207 would otherwise be unused in the text section. */
2208 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2209 asm (SECTION_OP "\n\t" \
2210 "call " USER_LABEL_PREFIX #FUNC "\n" \
2211 TEXT_SECTION_ASM_OP);
2213 /* Print operand X (an rtx) in assembler syntax to file FILE.
2214 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
2215 Effect of various CODE letters is described in i386.c near
2216 print_operand function. */
2218 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
2219 ((CODE) == '*' || (CODE) == '+' || (CODE) == '&' || (CODE) == ';')
2221 #define PRINT_OPERAND(FILE, X, CODE) \
2222 print_operand ((FILE), (X), (CODE))
2224 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
2225 print_operand_address ((FILE), (ADDR))
2227 #define OUTPUT_ADDR_CONST_EXTRA(FILE, X, FAIL) \
2229 if (! output_addr_const_extra (FILE, (X))) \
2233 /* Which processor to schedule for. The cpu attribute defines a list that
2234 mirrors this list, so changes to i386.md must be made at the same time. */
2238 PROCESSOR_I386 = 0, /* 80386 */
2239 PROCESSOR_I486, /* 80486DX, 80486SX, 80486DX[24] */
2241 PROCESSOR_PENTIUMPRO,
2249 PROCESSOR_GENERIC32,
2250 PROCESSOR_GENERIC64,
2256 extern enum processor_type ix86_tune;
2257 extern enum processor_type ix86_arch;
2265 extern enum fpmath_unit ix86_fpmath;
2274 extern enum tls_dialect ix86_tls_dialect;
2277 CM_32, /* The traditional 32-bit ABI. */
2278 CM_SMALL, /* Assumes all code and data fits in the low 31 bits. */
2279 CM_KERNEL, /* Assumes all code and data fits in the high 31 bits. */
2280 CM_MEDIUM, /* Assumes code fits in the low 31 bits; data unlimited. */
2281 CM_LARGE, /* No assumptions. */
2282 CM_SMALL_PIC, /* Assumes code+data+got/plt fits in a 31 bit region. */
2283 CM_MEDIUM_PIC,/* Assumes code+got/plt fits in a 31 bit region. */
2284 CM_LARGE_PIC /* No assumptions. */
2287 extern enum cmodel ix86_cmodel;
2289 /* Size of the RED_ZONE area. */
2290 #define RED_ZONE_SIZE 128
2291 /* Reserved area of the red zone for temporaries. */
2292 #define RED_ZONE_RESERVE 8
2299 extern enum asm_dialect ix86_asm_dialect;
2300 extern unsigned int ix86_preferred_stack_boundary;
2301 extern unsigned int ix86_incoming_stack_boundary;
2302 extern int ix86_branch_cost, ix86_section_threshold;
2304 /* Smallest class containing REGNO. */
2305 extern enum reg_class const regclass_map[FIRST_PSEUDO_REGISTER];
2307 extern rtx ix86_compare_op0; /* operand 0 for comparisons */
2308 extern rtx ix86_compare_op1; /* operand 1 for comparisons */
2310 /* To properly truncate FP values into integers, we need to set i387 control
2311 word. We can't emit proper mode switching code before reload, as spills
2312 generated by reload may truncate values incorrectly, but we still can avoid
2313 redundant computation of new control word by the mode switching pass.
2314 The fldcw instructions are still emitted redundantly, but this is probably
2315 not going to be noticeable problem, as most CPUs do have fast path for
2318 The machinery is to emit simple truncation instructions and split them
2319 before reload to instructions having USEs of two memory locations that
2320 are filled by this code to old and new control word.
2322 Post-reload pass may be later used to eliminate the redundant fildcw if
2334 enum ix86_stack_slot
2343 MAX_386_STACK_LOCALS
2346 /* Define this macro if the port needs extra instructions inserted
2347 for mode switching in an optimizing compilation. */
2349 #define OPTIMIZE_MODE_SWITCHING(ENTITY) \
2350 ix86_optimize_mode_switching[(ENTITY)]
2352 /* If you define `OPTIMIZE_MODE_SWITCHING', you have to define this as
2353 initializer for an array of integers. Each initializer element N
2354 refers to an entity that needs mode switching, and specifies the
2355 number of different modes that might need to be set for this
2356 entity. The position of the initializer in the initializer -
2357 starting counting at zero - determines the integer that is used to
2358 refer to the mode-switched entity in question. */
2360 #define NUM_MODES_FOR_MODE_SWITCHING \
2361 { I387_CW_ANY, I387_CW_ANY, I387_CW_ANY, I387_CW_ANY }
2363 /* ENTITY is an integer specifying a mode-switched entity. If
2364 `OPTIMIZE_MODE_SWITCHING' is defined, you must define this macro to
2365 return an integer value not larger than the corresponding element
2366 in `NUM_MODES_FOR_MODE_SWITCHING', to denote the mode that ENTITY
2367 must be switched into prior to the execution of INSN. */
2369 #define MODE_NEEDED(ENTITY, I) ix86_mode_needed ((ENTITY), (I))
2371 /* This macro specifies the order in which modes for ENTITY are
2372 processed. 0 is the highest priority. */
2374 #define MODE_PRIORITY_TO_MODE(ENTITY, N) (N)
2376 /* Generate one or more insns to set ENTITY to MODE. HARD_REG_LIVE
2377 is the set of hard registers live at the point where the insn(s)
2378 are to be inserted. */
2380 #define EMIT_MODE_SET(ENTITY, MODE, HARD_REGS_LIVE) \
2381 ((MODE) != I387_CW_ANY && (MODE) != I387_CW_UNINITIALIZED \
2382 ? emit_i387_cw_initialization (MODE), 0 \
2386 /* Avoid renaming of stack registers, as doing so in combination with
2387 scheduling just increases amount of live registers at time and in
2388 the turn amount of fxch instructions needed.
2390 ??? Maybe Pentium chips benefits from renaming, someone can try.... */
2392 #define HARD_REGNO_RENAME_OK(SRC, TARGET) \
2393 (! IN_RANGE ((SRC), FIRST_STACK_REG, LAST_STACK_REG))
2396 #define FASTCALL_PREFIX '@'
2398 /* Machine specific CFA tracking during prologue/epilogue generation. */
2400 #ifndef USED_FOR_TARGET
2401 struct GTY(()) machine_cfa_state
2404 HOST_WIDE_INT offset;
2407 struct GTY(()) machine_function {
2408 struct stack_local_entry *stack_locals;
2409 const char *some_ld_name;
2410 int varargs_gpr_size;
2411 int varargs_fpr_size;
2412 int accesses_prev_frame;
2413 int optimize_mode_switching[MAX_386_ENTITIES];
2415 /* Set by ix86_compute_frame_layout and used by prologue/epilogue
2416 expander to determine the style used. */
2417 int use_fast_prologue_epilogue;
2418 /* Number of saved registers USE_FAST_PROLOGUE_EPILOGUE has been computed
2420 int use_fast_prologue_epilogue_nregs;
2421 /* If true, the current function needs the default PIC register, not
2422 an alternate register (on x86) and must not use the red zone (on
2423 x86_64), even if it's a leaf function. We don't want the
2424 function to be regarded as non-leaf because TLS calls need not
2425 affect register allocation. This flag is set when a TLS call
2426 instruction is expanded within a function, and never reset, even
2427 if all such instructions are optimized away. Use the
2428 ix86_current_function_calls_tls_descriptor macro for a better
2430 int tls_descriptor_call_expanded_p;
2431 /* This value is used for amd64 targets and specifies the current abi
2432 to be used. MS_ABI means ms abi. Otherwise SYSV_ABI means sysv abi. */
2433 enum calling_abi call_abi;
2434 struct machine_cfa_state cfa;
2438 #define ix86_stack_locals (cfun->machine->stack_locals)
2439 #define ix86_varargs_gpr_size (cfun->machine->varargs_gpr_size)
2440 #define ix86_varargs_fpr_size (cfun->machine->varargs_fpr_size)
2441 #define ix86_optimize_mode_switching (cfun->machine->optimize_mode_switching)
2442 #define ix86_current_function_needs_cld (cfun->machine->needs_cld)
2443 #define ix86_tls_descriptor_calls_expanded_in_cfun \
2444 (cfun->machine->tls_descriptor_call_expanded_p)
2445 /* Since tls_descriptor_call_expanded is not cleared, even if all TLS
2446 calls are optimized away, we try to detect cases in which it was
2447 optimized away. Since such instructions (use (reg REG_SP)), we can
2448 verify whether there's any such instruction live by testing that
2450 #define ix86_current_function_calls_tls_descriptor \
2451 (ix86_tls_descriptor_calls_expanded_in_cfun && df_regs_ever_live_p (SP_REG))
2452 #define ix86_cfa_state (&cfun->machine->cfa)
2454 /* Control behavior of x86_file_start. */
2455 #define X86_FILE_START_VERSION_DIRECTIVE false
2456 #define X86_FILE_START_FLTUSED false
2458 /* Flag to mark data that is in the large address area. */
2459 #define SYMBOL_FLAG_FAR_ADDR (SYMBOL_FLAG_MACH_DEP << 0)
2460 #define SYMBOL_REF_FAR_ADDR_P(X) \
2461 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_FAR_ADDR) != 0)
2463 /* Flags to mark dllimport/dllexport. Used by PE ports, but handy to
2464 have defined always, to avoid ifdefing. */
2465 #define SYMBOL_FLAG_DLLIMPORT (SYMBOL_FLAG_MACH_DEP << 1)
2466 #define SYMBOL_REF_DLLIMPORT_P(X) \
2467 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_DLLIMPORT) != 0)
2469 #define SYMBOL_FLAG_DLLEXPORT (SYMBOL_FLAG_MACH_DEP << 2)
2470 #define SYMBOL_REF_DLLEXPORT_P(X) \
2471 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_DLLEXPORT) != 0)
2473 /* Model costs for vectorizer. */
2475 /* Cost of conditional branch. */
2476 #undef TARG_COND_BRANCH_COST
2477 #define TARG_COND_BRANCH_COST ix86_cost->branch_cost
2479 /* Enum through the target specific extra va_list types.
2480 Please, do not iterate the base va_list type name. */
2481 #define TARGET_ENUM_VA_LIST(IDX, PNAME, PTYPE) \
2482 (TARGET_64BIT ? ix86_enum_va_list (IDX, PNAME, PTYPE) : 0)
2484 /* Cost of any scalar operation, excluding load and store. */
2485 #undef TARG_SCALAR_STMT_COST
2486 #define TARG_SCALAR_STMT_COST ix86_cost->scalar_stmt_cost
2488 /* Cost of scalar load. */
2489 #undef TARG_SCALAR_LOAD_COST
2490 #define TARG_SCALAR_LOAD_COST ix86_cost->scalar_load_cost
2492 /* Cost of scalar store. */
2493 #undef TARG_SCALAR_STORE_COST
2494 #define TARG_SCALAR_STORE_COST ix86_cost->scalar_store_cost
2496 /* Cost of any vector operation, excluding load, store or vector to scalar
2498 #undef TARG_VEC_STMT_COST
2499 #define TARG_VEC_STMT_COST ix86_cost->vec_stmt_cost
2501 /* Cost of vector to scalar operation. */
2502 #undef TARG_VEC_TO_SCALAR_COST
2503 #define TARG_VEC_TO_SCALAR_COST ix86_cost->vec_to_scalar_cost
2505 /* Cost of scalar to vector operation. */
2506 #undef TARG_SCALAR_TO_VEC_COST
2507 #define TARG_SCALAR_TO_VEC_COST ix86_cost->scalar_to_vec_cost
2509 /* Cost of aligned vector load. */
2510 #undef TARG_VEC_LOAD_COST
2511 #define TARG_VEC_LOAD_COST ix86_cost->vec_align_load_cost
2513 /* Cost of misaligned vector load. */
2514 #undef TARG_VEC_UNALIGNED_LOAD_COST
2515 #define TARG_VEC_UNALIGNED_LOAD_COST ix86_cost->vec_unalign_load_cost
2517 /* Cost of vector store. */
2518 #undef TARG_VEC_STORE_COST
2519 #define TARG_VEC_STORE_COST ix86_cost->vec_store_cost
2521 /* Cost of conditional taken branch for vectorizer cost model. */
2522 #undef TARG_COND_TAKEN_BRANCH_COST
2523 #define TARG_COND_TAKEN_BRANCH_COST ix86_cost->cond_taken_branch_cost
2525 /* Cost of conditional not taken branch for vectorizer cost model. */
2526 #undef TARG_COND_NOT_TAKEN_BRANCH_COST
2527 #define TARG_COND_NOT_TAKEN_BRANCH_COST ix86_cost->cond_not_taken_branch_cost