1 /* Definitions of target machine for GNU compiler. MIPS version.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
3 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
4 Contributed by A. Lichnewsky (lich@inria.inria.fr).
5 Changed by Michael Meissner (meissner@osf.org).
6 64 bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
7 Brendan Eich (brendan@microunity.com).
9 This file is part of GNU CC.
11 GNU CC is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 GNU CC is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with GNU CC; see the file COPYING. If not, write to
23 the Free Software Foundation, 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
27 /* Standard GCC variables that we reference. */
29 extern char *asm_file_name;
30 extern char call_used_regs[];
31 extern int may_call_alloca;
32 extern char **save_argv;
33 extern int target_flags;
35 /* MIPS external variables defined in mips.c. */
39 CMP_SI, /* compare four byte integers */
40 CMP_DI, /* compare eight byte integers */
41 CMP_SF, /* compare single precision floats */
42 CMP_DF, /* compare double precision floats */
43 CMP_MAX /* max comparison type */
46 /* Which processor to schedule for. Since there is no difference between
47 a R2000 and R3000 in terms of the scheduler, we collapse them into
48 just an R3000. The elements of the enumeration must match exactly
49 the cpu attribute in the mips.md machine description. */
75 /* Recast the cpu class to be the cpu attribute. */
76 #define mips_cpu_attr ((enum attr_cpu)mips_tune)
78 /* Which ABI to use. ABI_32 (original 32, or o32), ABI_N32 (n32),
79 ABI_64 (n64) are all defined by SGI. ABI_O64 is o32 extended
80 to work on a 64 bit machine. */
88 /* Whether to emit abicalls code sequences or not. */
90 enum mips_abicalls_type {
95 /* Recast the abicalls class to be the abicalls attribute. */
96 #define mips_abicalls_attr ((enum attr_abicalls)mips_abicalls)
98 /* Which type of block move to do (whether or not the last store is
99 split out so it can fill a branch delay slot). */
101 enum block_move_type {
102 BLOCK_MOVE_NORMAL, /* generate complete block move */
103 BLOCK_MOVE_NOT_LAST, /* generate all but last store */
104 BLOCK_MOVE_LAST /* generate just the last store */
107 /* Information about one recognized processor. Defined here for the
108 benefit of TARGET_CPU_CPP_BUILTINS. */
109 struct mips_cpu_info {
110 /* The 'canonical' name of the processor as far as GCC is concerned.
111 It's typically a manufacturer's prefix followed by a numerical
112 designation. It should be lower case. */
115 /* The internal processor number that most closely matches this
116 entry. Several processors can have the same value, if there's no
117 difference between them from GCC's point of view. */
118 enum processor_type cpu;
120 /* The ISA level that the processor implements. */
124 extern char mips_reg_names[][8]; /* register names (a0 vs. $4). */
125 extern char mips_print_operand_punct[256]; /* print_operand punctuation chars */
126 extern const char *current_function_file; /* filename current function is in */
127 extern int num_source_filenames; /* current .file # */
128 extern int inside_function; /* != 0 if inside of a function */
129 extern int ignore_line_number; /* != 0 if we are to ignore next .loc */
130 extern int file_in_function_warning; /* warning given about .file in func */
131 extern int sdb_label_count; /* block start/end next label # */
132 extern int sdb_begin_function_line; /* Starting Line of current function */
133 extern int mips_section_threshold; /* # bytes of data/sdata cutoff */
134 /* extern unsigned HOST_WIDE_INT g_switch_value; */ /* value of the -G xx switch */
135 extern int g_switch_set; /* whether -G xx was passed. */
136 extern int sym_lineno; /* sgi next label # for each stmt */
137 extern int set_noreorder; /* # of nested .set noreorder's */
138 extern int set_nomacro; /* # of nested .set nomacro's */
139 extern int set_noat; /* # of nested .set noat's */
140 extern int set_volatile; /* # of nested .set volatile's */
141 extern int mips_branch_likely; /* emit 'l' after br (branch likely) */
142 extern int mips_dbx_regno[]; /* Map register # to debug register # */
143 extern GTY(()) rtx branch_cmp[2]; /* operands for compare */
144 extern enum cmp_type branch_type; /* what type of branch to use */
145 extern enum processor_type mips_arch; /* which cpu to codegen for */
146 extern enum processor_type mips_tune; /* which cpu to schedule for */
147 extern enum mips_abicalls_type mips_abicalls;/* for svr4 abi pic calls */
148 extern int mips_isa; /* architectural level */
149 extern int mips16; /* whether generating mips16 code */
150 extern int mips16_hard_float; /* mips16 without -msoft-float */
151 extern int mips_entry; /* generate entry/exit for mips16 */
152 extern const char *mips_arch_string; /* for -march=<xxx> */
153 extern const char *mips_tune_string; /* for -mtune=<xxx> */
154 extern const char *mips_isa_string; /* for -mips{1,2,3,4} */
155 extern const char *mips_abi_string; /* for -mabi={32,n32,64} */
156 extern const char *mips_entry_string; /* for -mentry */
157 extern const char *mips_no_mips16_string;/* for -mno-mips16 */
158 extern const char *mips_cache_flush_func;/* for -mflush-func= and -mno-flush-func */
159 extern int mips_string_length; /* length of strings for mips16 */
160 extern const struct mips_cpu_info mips_cpu_info_table[];
161 extern const struct mips_cpu_info *mips_arch_info;
162 extern const struct mips_cpu_info *mips_tune_info;
164 /* Functions to change what output section we are using. */
165 extern void sdata_section PARAMS ((void));
166 extern void sbss_section PARAMS ((void));
168 /* Macros to silence warnings about numbers being signed in traditional
169 C and unsigned in ISO C when compiled on 32-bit hosts. */
171 #define BITMASK_HIGH (((unsigned long)1) << 31) /* 0x80000000 */
172 #define BITMASK_UPPER16 ((unsigned long)0xffff << 16) /* 0xffff0000 */
173 #define BITMASK_LOWER16 ((unsigned long)0xffff) /* 0x0000ffff */
176 /* Run-time compilation parameters selecting different hardware subsets. */
178 /* Macros used in the machine description to test the flags. */
180 /* Bits for real switches */
181 #define MASK_INT64 0x00000001 /* ints are 64 bits */
182 #define MASK_LONG64 0x00000002 /* longs are 64 bits */
183 #define MASK_SPLIT_ADDR 0x00000004 /* Address splitting is enabled. */
184 #define MASK_GPOPT 0x00000008 /* Optimize for global pointer */
185 #define MASK_GAS 0x00000010 /* Gas used instead of MIPS as */
186 #define MASK_NAME_REGS 0x00000020 /* Use MIPS s/w reg name convention */
187 #define MASK_EXPLICIT_RELOCS 0x00000040 /* Use relocation operators. */
188 #define MASK_MEMCPY 0x00000080 /* call memcpy instead of inline code*/
189 #define MASK_SOFT_FLOAT 0x00000100 /* software floating point */
190 #define MASK_FLOAT64 0x00000200 /* fp registers are 64 bits */
191 #define MASK_ABICALLS 0x00000400 /* emit .abicalls/.cprestore/.cpload */
192 #define MASK_UNUSED1 0x00000800 /* Unused Mask. */
193 #define MASK_LONG_CALLS 0x00001000 /* Always call through a register */
194 #define MASK_64BIT 0x00002000 /* Use 64 bit GP registers and insns */
195 #define MASK_EMBEDDED_PIC 0x00004000 /* Generate embedded PIC code */
196 #define MASK_EMBEDDED_DATA 0x00008000 /* Reduce RAM usage, not fast code */
197 #define MASK_BIG_ENDIAN 0x00010000 /* Generate big endian code */
198 #define MASK_SINGLE_FLOAT 0x00020000 /* Only single precision FPU. */
199 #define MASK_MAD 0x00040000 /* Generate mad/madu as on 4650. */
200 #define MASK_4300_MUL_FIX 0x00080000 /* Work-around early Vr4300 CPU bug */
201 #define MASK_MIPS16 0x00100000 /* Generate mips16 code */
202 #define MASK_NO_CHECK_ZERO_DIV \
203 0x00200000 /* divide by zero checking */
204 #define MASK_CHECK_RANGE_DIV \
205 0x00400000 /* divide result range checking */
206 #define MASK_UNINIT_CONST_IN_RODATA \
207 0x00800000 /* Store uninitialized
209 #define MASK_NO_FUSED_MADD 0x01000000 /* Don't generate floating point
210 multiply-add operations. */
211 #define MASK_BRANCHLIKELY 0x02000000 /* Generate Branch Likely
214 /* Debug switches, not documented */
215 #define MASK_DEBUG 0 /* unused */
216 #define MASK_DEBUG_A 0 /* don't allow <label>($reg) addrs */
217 #define MASK_DEBUG_B 0 /* GO_IF_LEGITIMATE_ADDRESS debug */
218 #define MASK_DEBUG_C 0 /* don't expand seq, etc. */
219 #define MASK_DEBUG_D 0 /* don't do define_split's */
220 #define MASK_DEBUG_E 0 /* function_arg debug */
221 #define MASK_DEBUG_F 0 /* ??? */
222 #define MASK_DEBUG_G 0 /* don't support 64 bit arithmetic */
223 #define MASK_DEBUG_I 0 /* unused */
225 /* Dummy switches used only in specs */
226 #define MASK_MIPS_TFILE 0 /* flag for mips-tfile usage */
228 /* r4000 64 bit sizes */
229 #define TARGET_INT64 (target_flags & MASK_INT64)
230 #define TARGET_LONG64 (target_flags & MASK_LONG64)
231 #define TARGET_FLOAT64 (target_flags & MASK_FLOAT64)
232 #define TARGET_64BIT (target_flags & MASK_64BIT)
234 /* Mips vs. GNU linker */
235 #define TARGET_SPLIT_ADDRESSES (target_flags & MASK_SPLIT_ADDR)
237 /* Mips vs. GNU assembler */
238 #define TARGET_GAS (target_flags & MASK_GAS)
239 #define TARGET_MIPS_AS (!TARGET_GAS)
242 #define TARGET_DEBUG_MODE (target_flags & MASK_DEBUG)
243 #define TARGET_DEBUG_A_MODE (target_flags & MASK_DEBUG_A)
244 #define TARGET_DEBUG_B_MODE (target_flags & MASK_DEBUG_B)
245 #define TARGET_DEBUG_C_MODE (target_flags & MASK_DEBUG_C)
246 #define TARGET_DEBUG_D_MODE (target_flags & MASK_DEBUG_D)
247 #define TARGET_DEBUG_E_MODE (target_flags & MASK_DEBUG_E)
248 #define TARGET_DEBUG_F_MODE (target_flags & MASK_DEBUG_F)
249 #define TARGET_DEBUG_G_MODE (target_flags & MASK_DEBUG_G)
250 #define TARGET_DEBUG_I_MODE (target_flags & MASK_DEBUG_I)
252 /* Reg. Naming in .s ($21 vs. $a0) */
253 #define TARGET_NAME_REGS (target_flags & MASK_NAME_REGS)
255 /* Optimize for Sdata/Sbss */
256 #define TARGET_GP_OPT (target_flags & MASK_GPOPT)
258 /* call memcpy instead of inline code */
259 #define TARGET_MEMCPY (target_flags & MASK_MEMCPY)
261 /* .abicalls, etc from Pyramid V.4 */
262 #define TARGET_ABICALLS (target_flags & MASK_ABICALLS)
264 /* software floating point */
265 #define TARGET_SOFT_FLOAT (target_flags & MASK_SOFT_FLOAT)
266 #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT)
268 /* always call through a register */
269 #define TARGET_LONG_CALLS (target_flags & MASK_LONG_CALLS)
271 /* generate embedded PIC code;
273 #define TARGET_EMBEDDED_PIC (target_flags & MASK_EMBEDDED_PIC)
275 /* for embedded systems, optimize for
276 reduced RAM space instead of for
278 #define TARGET_EMBEDDED_DATA (target_flags & MASK_EMBEDDED_DATA)
280 /* always store uninitialized const
281 variables in rodata, requires
282 TARGET_EMBEDDED_DATA. */
283 #define TARGET_UNINIT_CONST_IN_RODATA (target_flags & MASK_UNINIT_CONST_IN_RODATA)
285 /* generate big endian code. */
286 #define TARGET_BIG_ENDIAN (target_flags & MASK_BIG_ENDIAN)
288 #define TARGET_SINGLE_FLOAT (target_flags & MASK_SINGLE_FLOAT)
289 #define TARGET_DOUBLE_FLOAT (! TARGET_SINGLE_FLOAT)
291 #define TARGET_MAD (target_flags & MASK_MAD)
293 #define TARGET_FUSED_MADD (! (target_flags & MASK_NO_FUSED_MADD))
295 #define TARGET_4300_MUL_FIX (target_flags & MASK_4300_MUL_FIX)
297 #define TARGET_NO_CHECK_ZERO_DIV (target_flags & MASK_NO_CHECK_ZERO_DIV)
298 #define TARGET_CHECK_RANGE_DIV (target_flags & MASK_CHECK_RANGE_DIV)
300 #define TARGET_BRANCHLIKELY (target_flags & MASK_BRANCHLIKELY)
303 /* True if we should use NewABI-style relocation operators for
304 symbolic addresses. This is never true for mips16 code,
305 which has its own conventions. */
307 #define TARGET_EXPLICIT_RELOCS (target_flags & MASK_EXPLICIT_RELOCS)
310 /* This is true if we must enable the assembly language file switching
313 #define TARGET_FILE_SWITCHING \
314 (TARGET_GP_OPT && ! TARGET_GAS && ! TARGET_MIPS16)
316 /* True if the call patterns should be split into a jalr followed by
317 an instruction to restore $gp. This is only ever true for SVR4 PIC,
318 in which $gp is call-clobbered. It is only safe to split the load
319 from the call when every use of $gp is explicit. */
321 #define TARGET_SPLIT_CALLS \
322 (TARGET_EXPLICIT_RELOCS && TARGET_ABICALLS && !TARGET_NEWABI)
324 /* True if we can optimize sibling calls. For simplicity, we only
325 handle cases in which call_insn_operand will reject invalid
326 sibcall addresses. There are two cases in which this isn't true:
328 - TARGET_MIPS16. call_insn_operand accepts constant addresses
329 but there is no direct jump instruction. It isn't worth
330 using sibling calls in this case anyway; they would usually
331 be longer than normal calls.
333 - TARGET_ABICALLS && !TARGET_EXPLICIT_RELOCS. call_insn_operand
334 accepts global constants, but "jr $25" is the only allowed
337 #define TARGET_SIBCALLS \
338 (!TARGET_MIPS16 && (!TARGET_ABICALLS || TARGET_EXPLICIT_RELOCS))
340 /* True if .gpword or .gpdword should be used for switch tables.
341 Not all SGI assemblers support this. */
343 #define TARGET_GPWORD (TARGET_ABICALLS && (!TARGET_NEWABI || TARGET_GAS))
346 /* We must disable the function end stabs when doing the file switching trick,
347 because the Lscope stabs end up in the wrong place, making it impossible
348 to debug the resulting code. */
349 #define NO_DBX_FUNCTION_END TARGET_FILE_SWITCHING
351 /* Generate mips16 code */
352 #define TARGET_MIPS16 (target_flags & MASK_MIPS16)
354 /* Generic ISA defines. */
355 #define ISA_MIPS1 (mips_isa == 1)
356 #define ISA_MIPS2 (mips_isa == 2)
357 #define ISA_MIPS3 (mips_isa == 3)
358 #define ISA_MIPS4 (mips_isa == 4)
359 #define ISA_MIPS32 (mips_isa == 32)
360 #define ISA_MIPS32R2 (mips_isa == 33)
361 #define ISA_MIPS64 (mips_isa == 64)
363 /* Architecture target defines. */
364 #define TARGET_MIPS3900 (mips_arch == PROCESSOR_R3900)
365 #define TARGET_MIPS4000 (mips_arch == PROCESSOR_R4000)
366 #define TARGET_MIPS4100 (mips_arch == PROCESSOR_R4100)
367 #define TARGET_MIPS4120 (mips_arch == PROCESSOR_R4120)
368 #define TARGET_MIPS4300 (mips_arch == PROCESSOR_R4300)
369 #define TARGET_MIPS4KC (mips_arch == PROCESSOR_4KC)
370 #define TARGET_MIPS5KC (mips_arch == PROCESSOR_5KC)
371 #define TARGET_MIPS5400 (mips_arch == PROCESSOR_R5400)
372 #define TARGET_MIPS5500 (mips_arch == PROCESSOR_R5500)
373 #define TARGET_SB1 (mips_arch == PROCESSOR_SB1)
374 #define TARGET_SR71K (mips_arch == PROCESSOR_SR71000)
376 /* Scheduling target defines. */
377 #define TUNE_MIPS3000 (mips_tune == PROCESSOR_R3000)
378 #define TUNE_MIPS3900 (mips_tune == PROCESSOR_R3900)
379 #define TUNE_MIPS4000 (mips_tune == PROCESSOR_R4000)
380 #define TUNE_MIPS5000 (mips_tune == PROCESSOR_R5000)
381 #define TUNE_MIPS5400 (mips_tune == PROCESSOR_R5400)
382 #define TUNE_MIPS5500 (mips_tune == PROCESSOR_R5500)
383 #define TUNE_MIPS6000 (mips_tune == PROCESSOR_R6000)
384 #define TUNE_SB1 (mips_tune == PROCESSOR_SB1)
385 #define TUNE_SR71K (mips_tune == PROCESSOR_SR71000)
387 #define TARGET_NEWABI (mips_abi == ABI_N32 || mips_abi == ABI_64)
389 /* Define preprocessor macros for the -march and -mtune options.
390 PREFIX is either _MIPS_ARCH or _MIPS_TUNE, INFO is the selected
391 processor. If INFO's canonical name is "foo", define PREFIX to
392 be "foo", and define an additional macro PREFIX_FOO. */
393 #define MIPS_CPP_SET_PROCESSOR(PREFIX, INFO) \
398 macro = concat ((PREFIX), "_", (INFO)->name, NULL); \
399 for (p = macro; *p != 0; p++) \
402 builtin_define (macro); \
403 builtin_define_with_value ((PREFIX), (INFO)->name, 1); \
408 /* Target CPU builtins. */
409 #define TARGET_CPU_CPP_BUILTINS() \
412 builtin_assert ("cpu=mips"); \
413 builtin_define ("__mips__"); \
414 builtin_define ("_mips"); \
416 /* We do this here because __mips is defined below \
417 and so we can't use builtin_define_std. */ \
419 builtin_define ("mips"); \
421 /* Treat _R3000 and _R4000 like register-size defines, \
422 which is how they've historically been used. */ \
425 builtin_define ("__mips64"); \
426 builtin_define_std ("R4000"); \
427 builtin_define ("_R4000"); \
431 builtin_define_std ("R3000"); \
432 builtin_define ("_R3000"); \
434 if (TARGET_FLOAT64) \
435 builtin_define ("__mips_fpr=64"); \
437 builtin_define ("__mips_fpr=32"); \
440 builtin_define ("__mips16"); \
442 MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info); \
443 MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info); \
447 builtin_define ("__mips=1"); \
448 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS1"); \
450 else if (ISA_MIPS2) \
452 builtin_define ("__mips=2"); \
453 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS2"); \
455 else if (ISA_MIPS3) \
457 builtin_define ("__mips=3"); \
458 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS3"); \
460 else if (ISA_MIPS4) \
462 builtin_define ("__mips=4"); \
463 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS4"); \
465 else if (ISA_MIPS32) \
467 builtin_define ("__mips=32"); \
468 builtin_define ("__mips_isa_rev=1"); \
469 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
471 else if (ISA_MIPS32R2) \
473 builtin_define ("__mips=32"); \
474 builtin_define ("__mips_isa_rev=2"); \
475 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
477 else if (ISA_MIPS64) \
479 builtin_define ("__mips=64"); \
480 builtin_define ("__mips_isa_rev=1"); \
481 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
484 if (TARGET_HARD_FLOAT) \
485 builtin_define ("__mips_hard_float"); \
486 else if (TARGET_SOFT_FLOAT) \
487 builtin_define ("__mips_soft_float"); \
489 if (TARGET_SINGLE_FLOAT) \
490 builtin_define ("__mips_single_float"); \
492 if (TARGET_BIG_ENDIAN) \
494 builtin_define_std ("MIPSEB"); \
495 builtin_define ("_MIPSEB"); \
499 builtin_define_std ("MIPSEL"); \
500 builtin_define ("_MIPSEL"); \
503 /* Macros dependent on the C dialect. */ \
504 if (preprocessing_asm_p ()) \
506 builtin_define_std ("LANGUAGE_ASSEMBLY"); \
507 builtin_define ("_LANGUAGE_ASSEMBLY"); \
509 else if (c_language == clk_c) \
511 builtin_define_std ("LANGUAGE_C"); \
512 builtin_define ("_LANGUAGE_C"); \
514 else if (c_language == clk_cplusplus) \
516 builtin_define ("_LANGUAGE_C_PLUS_PLUS"); \
517 builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \
518 builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \
522 builtin_define ("_LANGUAGE_OBJECTIVE_C"); \
523 builtin_define ("__LANGUAGE_OBJECTIVE_C"); \
524 /* Bizzare, but needed at least for Irix. */ \
525 builtin_define_std ("LANGUAGE_C"); \
526 builtin_define ("_LANGUAGE_C"); \
529 if (mips_abi == ABI_EABI) \
530 builtin_define ("__mips_eabi"); \
536 /* Macro to define tables used to set the flags.
537 This is a list in braces of pairs in braces,
538 each pair being { "NAME", VALUE }
539 where VALUE is the bits to set or minus the bits to clear.
540 An empty string NAME is used to identify the default VALUE. */
542 #define TARGET_SWITCHES \
544 SUBTARGET_TARGET_SWITCHES \
545 {"int64", MASK_INT64 | MASK_LONG64, \
546 N_("Use 64-bit int type")}, \
547 {"long64", MASK_LONG64, \
548 N_("Use 64-bit long type")}, \
549 {"long32", -(MASK_LONG64 | MASK_INT64), \
550 N_("Use 32-bit long type")}, \
551 {"split-addresses", MASK_SPLIT_ADDR, \
552 N_("Optimize lui/addiu address loads")}, \
553 {"no-split-addresses", -MASK_SPLIT_ADDR, \
554 N_("Don't optimize lui/addiu address loads")}, \
555 {"mips-as", -MASK_GAS, \
556 N_("Use MIPS as")}, \
559 {"rnames", MASK_NAME_REGS, \
560 N_("Use symbolic register names")}, \
561 {"no-rnames", -MASK_NAME_REGS, \
562 N_("Don't use symbolic register names")}, \
563 {"gpOPT", MASK_GPOPT, \
564 N_("Use GP relative sdata/sbss sections")}, \
565 {"gpopt", MASK_GPOPT, \
566 N_("Use GP relative sdata/sbss sections")}, \
567 {"no-gpOPT", -MASK_GPOPT, \
568 N_("Don't use GP relative sdata/sbss sections")}, \
569 {"no-gpopt", -MASK_GPOPT, \
570 N_("Don't use GP relative sdata/sbss sections")}, \
572 N_("Output compiler statistics (now ignored)")}, \
574 N_("Don't output compiler statistics")}, \
575 {"memcpy", MASK_MEMCPY, \
576 N_("Don't optimize block moves")}, \
577 {"no-memcpy", -MASK_MEMCPY, \
578 N_("Optimize block moves")}, \
579 {"mips-tfile", MASK_MIPS_TFILE, \
580 N_("Use mips-tfile asm postpass")}, \
581 {"no-mips-tfile", -MASK_MIPS_TFILE, \
582 N_("Don't use mips-tfile asm postpass")}, \
583 {"soft-float", MASK_SOFT_FLOAT, \
584 N_("Use software floating point")}, \
585 {"hard-float", -MASK_SOFT_FLOAT, \
586 N_("Use hardware floating point")}, \
587 {"fp64", MASK_FLOAT64, \
588 N_("Use 64-bit FP registers")}, \
589 {"fp32", -MASK_FLOAT64, \
590 N_("Use 32-bit FP registers")}, \
591 {"gp64", MASK_64BIT, \
592 N_("Use 64-bit general registers")}, \
593 {"gp32", -MASK_64BIT, \
594 N_("Use 32-bit general registers")}, \
595 {"abicalls", MASK_ABICALLS, \
596 N_("Use Irix PIC")}, \
597 {"no-abicalls", -MASK_ABICALLS, \
598 N_("Don't use Irix PIC")}, \
599 {"long-calls", MASK_LONG_CALLS, \
600 N_("Use indirect calls")}, \
601 {"no-long-calls", -MASK_LONG_CALLS, \
602 N_("Don't use indirect calls")}, \
603 {"embedded-pic", MASK_EMBEDDED_PIC, \
604 N_("Use embedded PIC")}, \
605 {"no-embedded-pic", -MASK_EMBEDDED_PIC, \
606 N_("Don't use embedded PIC")}, \
607 {"embedded-data", MASK_EMBEDDED_DATA, \
608 N_("Use ROM instead of RAM")}, \
609 {"no-embedded-data", -MASK_EMBEDDED_DATA, \
610 N_("Don't use ROM instead of RAM")}, \
611 {"uninit-const-in-rodata", MASK_UNINIT_CONST_IN_RODATA, \
612 N_("Put uninitialized constants in ROM (needs -membedded-data)")}, \
613 {"no-uninit-const-in-rodata", -MASK_UNINIT_CONST_IN_RODATA, \
614 N_("Don't put uninitialized constants in ROM")}, \
615 {"eb", MASK_BIG_ENDIAN, \
616 N_("Use big-endian byte order")}, \
617 {"el", -MASK_BIG_ENDIAN, \
618 N_("Use little-endian byte order")}, \
619 {"single-float", MASK_SINGLE_FLOAT, \
620 N_("Use single (32-bit) FP only")}, \
621 {"double-float", -MASK_SINGLE_FLOAT, \
622 N_("Don't use single (32-bit) FP only")}, \
624 N_("Use multiply accumulate")}, \
625 {"no-mad", -MASK_MAD, \
626 N_("Don't use multiply accumulate")}, \
627 {"no-fused-madd", MASK_NO_FUSED_MADD, \
628 N_("Don't generate fused multiply/add instructions")}, \
629 {"fused-madd", -MASK_NO_FUSED_MADD, \
630 N_("Generate fused multiply/add instructions")}, \
631 {"fix4300", MASK_4300_MUL_FIX, \
632 N_("Work around early 4300 hardware bug")}, \
633 {"no-fix4300", -MASK_4300_MUL_FIX, \
634 N_("Don't work around early 4300 hardware bug")}, \
635 {"check-zero-division",-MASK_NO_CHECK_ZERO_DIV, \
636 N_("Trap on integer divide by zero")}, \
637 {"no-check-zero-division", MASK_NO_CHECK_ZERO_DIV, \
638 N_("Don't trap on integer divide by zero")}, \
639 {"check-range-division",MASK_CHECK_RANGE_DIV, \
640 N_("Trap on integer divide overflow")}, \
641 {"no-check-range-division",-MASK_CHECK_RANGE_DIV, \
642 N_("Don't trap on integer divide overflow")}, \
643 { "branch-likely", MASK_BRANCHLIKELY, \
644 N_("Use Branch Likely instructions, overriding default for arch")}, \
645 { "no-branch-likely", -MASK_BRANCHLIKELY, \
646 N_("Don't use Branch Likely instructions, overriding default for arch")}, \
647 {"explicit-relocs", MASK_EXPLICIT_RELOCS, \
648 N_("Use NewABI-style %reloc() assembly operators")}, \
649 {"no-explicit-relocs", -MASK_EXPLICIT_RELOCS, \
650 N_("Use assembler macros instead of relocation operators")}, \
651 {"debug", MASK_DEBUG, \
653 {"debuga", MASK_DEBUG_A, \
655 {"debugb", MASK_DEBUG_B, \
657 {"debugc", MASK_DEBUG_C, \
659 {"debugd", MASK_DEBUG_D, \
661 {"debuge", MASK_DEBUG_E, \
663 {"debugf", MASK_DEBUG_F, \
665 {"debugg", MASK_DEBUG_G, \
667 {"debugi", MASK_DEBUG_I, \
669 {"", (TARGET_DEFAULT \
670 | TARGET_CPU_DEFAULT \
671 | TARGET_ENDIAN_DEFAULT), \
675 /* Default target_flags if no switches are specified */
677 #ifndef TARGET_DEFAULT
678 #define TARGET_DEFAULT 0
681 #ifndef TARGET_CPU_DEFAULT
682 #define TARGET_CPU_DEFAULT 0
685 #ifndef TARGET_ENDIAN_DEFAULT
686 #define TARGET_ENDIAN_DEFAULT MASK_BIG_ENDIAN
689 /* 'from-abi' makes a good default: you get whatever the ABI requires. */
690 #ifndef MIPS_ISA_DEFAULT
691 #ifndef MIPS_CPU_STRING_DEFAULT
692 #define MIPS_CPU_STRING_DEFAULT "from-abi"
698 /* Make this compile time constant for libgcc2 */
700 #define TARGET_64BIT 1
702 #define TARGET_64BIT 0
704 #endif /* IN_LIBGCC2 */
706 #ifndef MULTILIB_ENDIAN_DEFAULT
707 #if TARGET_ENDIAN_DEFAULT == 0
708 #define MULTILIB_ENDIAN_DEFAULT "EL"
710 #define MULTILIB_ENDIAN_DEFAULT "EB"
714 #ifndef MULTILIB_ISA_DEFAULT
715 # if MIPS_ISA_DEFAULT == 1
716 # define MULTILIB_ISA_DEFAULT "mips1"
718 # if MIPS_ISA_DEFAULT == 2
719 # define MULTILIB_ISA_DEFAULT "mips2"
721 # if MIPS_ISA_DEFAULT == 3
722 # define MULTILIB_ISA_DEFAULT "mips3"
724 # if MIPS_ISA_DEFAULT == 4
725 # define MULTILIB_ISA_DEFAULT "mips4"
727 # if MIPS_ISA_DEFAULT == 32
728 # define MULTILIB_ISA_DEFAULT "mips32"
730 # if MIPS_ISA_DEFAULT == 33
731 # define MULTILIB_ISA_DEFAULT "mips32r2"
733 # if MIPS_ISA_DEFAULT == 64
734 # define MULTILIB_ISA_DEFAULT "mips64"
736 # define MULTILIB_ISA_DEFAULT "mips1"
746 #ifndef MULTILIB_DEFAULTS
747 #define MULTILIB_DEFAULTS \
748 { MULTILIB_ENDIAN_DEFAULT, MULTILIB_ISA_DEFAULT, MULTILIB_ABI_DEFAULT }
751 /* We must pass -EL to the linker by default for little endian embedded
752 targets using linker scripts with a OUTPUT_FORMAT line. Otherwise, the
753 linker will default to using big-endian output files. The OUTPUT_FORMAT
754 line must be in the linker script, otherwise -EB/-EL will not work. */
757 #if TARGET_ENDIAN_DEFAULT == 0
758 #define ENDIAN_SPEC "%{!EB:%{!meb:-EL}} %{EB|meb:-EB}"
760 #define ENDIAN_SPEC "%{!EL:%{!mel:-EB}} %{EL|mel:-EL}"
764 #define TARGET_OPTIONS \
766 SUBTARGET_TARGET_OPTIONS \
767 { "tune=", &mips_tune_string, \
768 N_("Specify CPU for scheduling purposes"), 0}, \
769 { "arch=", &mips_arch_string, \
770 N_("Specify CPU for code generation purposes"), 0}, \
771 { "abi=", &mips_abi_string, \
772 N_("Specify an ABI"), 0}, \
773 { "ips", &mips_isa_string, \
774 N_("Specify a Standard MIPS ISA"), 0}, \
775 { "entry", &mips_entry_string, \
776 N_("Use mips16 entry/exit psuedo ops"), 0}, \
777 { "no-mips16", &mips_no_mips16_string, \
778 N_("Don't use MIPS16 instructions"), 0}, \
779 { "no-flush-func", &mips_cache_flush_func, \
780 N_("Don't call any cache flush functions"), 0}, \
781 { "flush-func=", &mips_cache_flush_func, \
782 N_("Specify cache flush function"), 0}, \
785 /* This is meant to be redefined in the host dependent files. */
786 #define SUBTARGET_TARGET_OPTIONS
788 #define GENERATE_BRANCHLIKELY (TARGET_BRANCHLIKELY \
792 /* Generate three-operand multiply instructions for SImode. */
793 #define GENERATE_MULT3_SI ((TARGET_MIPS3900 \
801 /* Generate three-operand multiply instructions for DImode. */
802 #define GENERATE_MULT3_DI ((TARGET_MIPS3900) \
805 /* Macros to decide whether certain features are available or not,
806 depending on the instruction set architecture level. */
808 #define HAVE_SQRT_P() (!ISA_MIPS1)
810 /* True if the ABI can only work with 64-bit integer registers. We
811 generally allow ad-hoc variations for TARGET_SINGLE_FLOAT, but
812 otherwise floating-point registers must also be 64-bit. */
813 #define ABI_NEEDS_64BIT_REGS (mips_abi == ABI_64 \
814 || mips_abi == ABI_O64 \
815 || mips_abi == ABI_N32)
817 /* Likewise for 32-bit regs. */
818 #define ABI_NEEDS_32BIT_REGS (mips_abi == ABI_32)
820 /* True if symbols are 64 bits wide. At present, n64 is the only
821 ABI for which this is true. */
822 #define ABI_HAS_64BIT_SYMBOLS (mips_abi == ABI_64)
824 /* ISA has instructions for managing 64 bit fp and gp regs (eg. mips3). */
825 #define ISA_HAS_64BIT_REGS (ISA_MIPS3 \
829 /* ISA has branch likely instructions (eg. mips2). */
830 /* Disable branchlikely for tx39 until compare rewrite. They haven't
831 been generated up to this point. */
832 #define ISA_HAS_BRANCHLIKELY (!ISA_MIPS1 \
835 /* ISA has the conditional move instructions introduced in mips4. */
836 #define ISA_HAS_CONDMOVE ((ISA_MIPS4 \
840 && !TARGET_MIPS5500 \
843 /* ISA has just the integer condition move instructions (movn,movz) */
844 #define ISA_HAS_INT_CONDMOVE 0
846 /* ISA has the mips4 FP condition code instructions: FP-compare to CC,
847 branch on CC, and move (both FP and non-FP) on CC. */
848 #define ISA_HAS_8CC (ISA_MIPS4 \
853 /* This is a catch all for the other new mips4 instructions: indexed load and
854 indexed prefetch instructions, the FP madd and msub instructions,
855 and the FP recip and recip sqrt instructions */
856 #define ISA_HAS_FP4 ((ISA_MIPS4 \
860 /* ISA has conditional trap instructions. */
861 #define ISA_HAS_COND_TRAP (!ISA_MIPS1 \
864 /* ISA has integer multiply-accumulate instructions, madd and msub. */
865 #define ISA_HAS_MADD_MSUB ((ISA_MIPS32 \
870 /* ISA has floating-point nmadd and nmsub instructions. */
871 #define ISA_HAS_NMADD_NMSUB ((ISA_MIPS4 \
873 && (!TARGET_MIPS5400 || TARGET_MAD) \
876 /* ISA has count leading zeroes/ones instruction (not implemented). */
877 #define ISA_HAS_CLZ_CLO ((ISA_MIPS32 \
882 /* ISA has double-word count leading zeroes/ones instruction (not
884 #define ISA_HAS_DCLZ_DCLO (ISA_MIPS64 \
887 /* ISA has three operand multiply instructions that put
888 the high part in an accumulator: mulhi or mulhiu. */
889 #define ISA_HAS_MULHI (TARGET_MIPS5400 \
894 /* ISA has three operand multiply instructions that
895 negates the result and puts the result in an accumulator. */
896 #define ISA_HAS_MULS (TARGET_MIPS5400 \
901 /* ISA has three operand multiply instructions that subtracts the
902 result from a 4th operand and puts the result in an accumulator. */
903 #define ISA_HAS_MSAC (TARGET_MIPS5400 \
907 /* ISA has three operand multiply instructions that the result
908 from a 4th operand and puts the result in an accumulator. */
909 #define ISA_HAS_MACC ((TARGET_MIPS4120 && !TARGET_MIPS16) \
915 /* ISA has 32-bit rotate right instruction. */
916 #define ISA_HAS_ROTR_SI (!TARGET_MIPS16 \
923 /* ISA has 64-bit rotate right instruction. */
924 #define ISA_HAS_ROTR_DI (TARGET_64BIT \
926 && (TARGET_MIPS5400 \
931 /* ISA has data prefetch instruction. */
932 #define ISA_HAS_PREFETCH ((ISA_MIPS4 \
938 /* True if trunc.w.s and trunc.w.d are real (not synthetic)
939 instructions. Both require TARGET_HARD_FLOAT, and trunc.w.d
940 also requires TARGET_DOUBLE_FLOAT. */
941 #define ISA_HAS_TRUNC_W (!ISA_MIPS1)
943 /* ISA includes the MIPS32r2 seb and seh instructions. */
944 #define ISA_HAS_SEB_SEH (!TARGET_MIPS16 \
948 /* True if the result of a load is not available to the next instruction.
949 A nop will then be needed between instructions like "lw $4,..."
950 and "addiu $4,$4,1". */
951 #define ISA_HAS_LOAD_DELAY (mips_isa == 1 \
952 && !TARGET_MIPS3900 \
955 /* Likewise mtc1 and mfc1. */
956 #define ISA_HAS_XFER_DELAY (mips_isa <= 3)
958 /* Likewise floating-point comparisons. */
959 #define ISA_HAS_FCMP_DELAY (mips_isa <= 3)
961 /* True if mflo and mfhi can be immediately followed by instructions
962 which write to the HI and LO registers. Most targets require a
963 two-instruction gap. */
964 #define ISA_HAS_HILO_INTERLOCKS (TARGET_MIPS5500 || TARGET_SB1)
966 /* CC1_SPEC causes -mips3 and -mips4 to set -mfp64 and -mgp64; -mips1 or
967 -mips2 sets -mfp32 and -mgp32. This can be overridden by an explicit
968 -mfp32, -mfp64, -mgp32 or -mgp64. -mfp64 sets MASK_FLOAT64 in
969 target_flags, and -mgp64 sets MASK_64BIT.
971 Setting MASK_64BIT in target_flags will cause gcc to assume that
972 registers are 64 bits wide. int, long and void * will be 32 bit;
973 this may be changed with -mint64 or -mlong64.
975 The gen* programs link code that refers to MASK_64BIT. They don't
976 actually use the information in target_flags; they just refer to
979 /* Switch Recognition by gcc.c. Add -G xx support */
981 #undef SWITCH_TAKES_ARG
982 #define SWITCH_TAKES_ARG(CHAR) \
983 (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')
985 /* Sometimes certain combinations of command options do not make sense
986 on a particular target machine. You can define a macro
987 `OVERRIDE_OPTIONS' to take account of this. This macro, if
988 defined, is executed once just after all the command options have
991 On the MIPS, it is used to handle -G. We also use it to set up all
992 of the tables referenced in the other macros. */
994 #define OVERRIDE_OPTIONS override_options ()
996 #define CONDITIONAL_REGISTER_USAGE mips_conditional_register_usage ()
998 /* Show we can debug even without a frame pointer. */
999 #define CAN_DEBUG_WITHOUT_FP
1001 /* Tell collect what flags to pass to nm. */
1003 #define NM_FLAGS "-Bn"
1007 /* Assembler specs. */
1009 /* MIPS_AS_ASM_SPEC is passed when using the MIPS assembler rather
1012 #define MIPS_AS_ASM_SPEC "\
1013 %{!.s:-nocpp} %{.s: %{cpp} %{nocpp}} \
1014 %{pipe: %e-pipe is not supported} \
1015 %{K} %(subtarget_mips_as_asm_spec)"
1017 /* SUBTARGET_MIPS_AS_ASM_SPEC is passed when using the MIPS assembler
1018 rather than gas. It may be overridden by subtargets. */
1020 #ifndef SUBTARGET_MIPS_AS_ASM_SPEC
1021 #define SUBTARGET_MIPS_AS_ASM_SPEC "%{v}"
1024 /* GAS_ASM_SPEC is passed when using gas, rather than the MIPS
1027 #define GAS_ASM_SPEC "%{mtune=*} %{v}"
1029 #define SUBTARGET_TARGET_SWITCHES
1031 extern int mips_abi;
1033 #ifndef MIPS_ABI_DEFAULT
1034 #define MIPS_ABI_DEFAULT ABI_32
1037 /* Use the most portable ABI flag for the ASM specs. */
1039 #if MIPS_ABI_DEFAULT == ABI_32
1040 #define MULTILIB_ABI_DEFAULT "mabi=32"
1041 #define ASM_ABI_DEFAULT_SPEC "-32"
1044 #if MIPS_ABI_DEFAULT == ABI_O64
1045 #define MULTILIB_ABI_DEFAULT "mabi=o64"
1046 #define ASM_ABI_DEFAULT_SPEC "-mabi=o64"
1049 #if MIPS_ABI_DEFAULT == ABI_N32
1050 #define MULTILIB_ABI_DEFAULT "mabi=n32"
1051 #define ASM_ABI_DEFAULT_SPEC "-n32"
1054 #if MIPS_ABI_DEFAULT == ABI_64
1055 #define MULTILIB_ABI_DEFAULT "mabi=64"
1056 #define ASM_ABI_DEFAULT_SPEC "-64"
1059 #if MIPS_ABI_DEFAULT == ABI_EABI
1060 #define MULTILIB_ABI_DEFAULT "mabi=eabi"
1061 #define ASM_ABI_DEFAULT_SPEC "-mabi=eabi"
1064 /* Only ELF targets can switch the ABI. */
1065 #ifndef OBJECT_FORMAT_ELF
1066 #undef ASM_ABI_DEFAULT_SPEC
1067 #define ASM_ABI_DEFAULT_SPEC ""
1070 /* TARGET_ASM_SPEC is used to select either MIPS_AS_ASM_SPEC or
1071 GAS_ASM_SPEC as the default, depending upon the value of
1074 #if ((TARGET_CPU_DEFAULT | TARGET_DEFAULT) & MASK_GAS) != 0
1077 #define TARGET_ASM_SPEC "\
1078 %{mmips-as: %(mips_as_asm_spec)} \
1079 %{!mmips-as: %(gas_asm_spec)}"
1083 #define TARGET_ASM_SPEC "\
1084 %{!mgas: %(mips_as_asm_spec)} \
1085 %{mgas: %(gas_asm_spec)}"
1087 #endif /* not GAS */
1089 /* SUBTARGET_ASM_OPTIMIZING_SPEC handles passing optimization options
1090 to the assembler. It may be overridden by subtargets. */
1091 #ifndef SUBTARGET_ASM_OPTIMIZING_SPEC
1092 #define SUBTARGET_ASM_OPTIMIZING_SPEC "\
1094 %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}}"
1097 /* SUBTARGET_ASM_DEBUGGING_SPEC handles passing debugging options to
1098 the assembler. It may be overridden by subtargets. */
1099 #ifndef SUBTARGET_ASM_DEBUGGING_SPEC
1100 #define SUBTARGET_ASM_DEBUGGING_SPEC "\
1101 %{g} %{g0} %{g1} %{g2} %{g3} \
1102 %{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
1103 %{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
1104 %{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
1105 %{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \
1106 %{!gdwarf*:-mdebug} %{gdwarf*:-no-mdebug}"
1109 /* SUBTARGET_ASM_SPEC is always passed to the assembler. It may be
1110 overridden by subtargets. */
1112 #ifndef SUBTARGET_ASM_SPEC
1113 #define SUBTARGET_ASM_SPEC ""
1116 /* ASM_SPEC is the set of arguments to pass to the assembler. Note: we
1117 pass -mgp32, -mgp64, -march, -mabi=eabi and -meabi=o64 regardless of
1118 whether we're using GAS. These options can only be used properly
1119 with GAS, and it is better to get an error from a non-GAS assembler
1120 than to silently generate bad code. */
1124 %{G*} %(endian_spec) %{mips1} %{mips2} %{mips3} %{mips4} \
1125 %{mips32} %{mips32r2} %{mips64} \
1126 %{mips16:%{!mno-mips16:-mips16}} %{mno-mips16:-no-mips16} \
1127 %(subtarget_asm_optimizing_spec) \
1128 %(subtarget_asm_debugging_spec) \
1130 %{mabi=32:-32}%{mabi=n32:-n32}%{mabi=64:-64}%{mabi=n64:-64} \
1131 %{mabi=eabi} %{mabi=o64} %{!mabi*: %(asm_abi_default_spec)} \
1132 %{mgp32} %{mgp64} %{march=*} \
1133 %(target_asm_spec) \
1134 %(subtarget_asm_spec)"
1136 /* Specify to run a post-processor, mips-tfile after the assembler
1137 has run to stuff the mips debug information into the object file.
1138 This is needed because the $#!%^ MIPS assembler provides no way
1139 of specifying such information in the assembly file. If we are
1140 cross compiling, disable mips-tfile unless the user specifies
1143 #ifndef ASM_FINAL_SPEC
1144 #if ((TARGET_CPU_DEFAULT | TARGET_DEFAULT) & MASK_GAS) != 0
1146 #define ASM_FINAL_SPEC "\
1147 %{mmips-as: %{!mno-mips-tfile: \
1148 \n mips-tfile %{v*: -v} \
1150 %{!K: %{save-temps: -I %b.o~}} \
1151 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
1152 %{.s:%i} %{!.s:%g.s}}}"
1156 #define ASM_FINAL_SPEC "\
1157 %{!mgas: %{!mno-mips-tfile: \
1158 \n mips-tfile %{v*: -v} \
1160 %{!K: %{save-temps: -I %b.o~}} \
1161 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
1162 %{.s:%i} %{!.s:%g.s}}}"
1165 #endif /* ASM_FINAL_SPEC */
1167 /* Redefinition of libraries used. Mips doesn't support normal
1168 UNIX style profiling via calling _mcount. It does offer
1169 profiling that samples the PC, so do what we can... */
1172 #define LIB_SPEC "%{pg:-lprof1} %{p:-lprof1} -lc"
1175 /* Extra switches sometimes passed to the linker. */
1176 /* ??? The bestGnum will never be passed to the linker, because the gcc driver
1177 will interpret it as a -b option. */
1180 #define LINK_SPEC "\
1182 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips32r2} %{mips64} \
1183 %{bestGnum} %{shared} %{non_shared}"
1184 #endif /* LINK_SPEC defined */
1187 /* Specs for the compiler proper */
1189 /* SUBTARGET_CC1_SPEC is passed to the compiler proper. It may be
1190 overridden by subtargets. */
1191 #ifndef SUBTARGET_CC1_SPEC
1192 #define SUBTARGET_CC1_SPEC ""
1195 /* CC1_SPEC is the set of arguments to pass to the compiler proper. */
1196 /* Note, we will need to adjust the following if we ever find a MIPS variant
1197 that has 32-bit GPRs and 64-bit FPRs as well as fix all of the reload bugs
1198 that show up in this case. */
1202 %{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
1203 %{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \
1205 %(subtarget_cc1_spec)"
1208 /* Preprocessor specs. */
1210 /* SUBTARGET_CPP_SPEC is passed to the preprocessor. It may be
1211 overridden by subtargets. */
1212 #ifndef SUBTARGET_CPP_SPEC
1213 #define SUBTARGET_CPP_SPEC ""
1216 #define CPP_SPEC "%(subtarget_cpp_spec)"
1218 /* This macro defines names of additional specifications to put in the specs
1219 that can be used in various specifications like CC1_SPEC. Its definition
1220 is an initializer with a subgrouping for each command option.
1222 Each subgrouping contains a string constant, that defines the
1223 specification name, and a string constant that used by the GNU CC driver
1226 Do not define this macro if it does not need to do anything. */
1228 #define EXTRA_SPECS \
1229 { "subtarget_cc1_spec", SUBTARGET_CC1_SPEC }, \
1230 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
1231 { "mips_as_asm_spec", MIPS_AS_ASM_SPEC }, \
1232 { "gas_asm_spec", GAS_ASM_SPEC }, \
1233 { "target_asm_spec", TARGET_ASM_SPEC }, \
1234 { "subtarget_mips_as_asm_spec", SUBTARGET_MIPS_AS_ASM_SPEC }, \
1235 { "subtarget_asm_optimizing_spec", SUBTARGET_ASM_OPTIMIZING_SPEC }, \
1236 { "subtarget_asm_debugging_spec", SUBTARGET_ASM_DEBUGGING_SPEC }, \
1237 { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \
1238 { "asm_abi_default_spec", ASM_ABI_DEFAULT_SPEC }, \
1239 { "endian_spec", ENDIAN_SPEC }, \
1240 SUBTARGET_EXTRA_SPECS
1242 #ifndef SUBTARGET_EXTRA_SPECS
1243 #define SUBTARGET_EXTRA_SPECS
1246 /* If defined, this macro is an additional prefix to try after
1247 `STANDARD_EXEC_PREFIX'. */
1249 #ifndef MD_EXEC_PREFIX
1250 #define MD_EXEC_PREFIX "/usr/lib/cmplrs/cc/"
1253 #ifndef MD_STARTFILE_PREFIX
1254 #define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/"
1258 /* Print subsidiary information on the compiler version in use. */
1260 #define MIPS_VERSION "[AL 1.1, MM 40]"
1262 #ifndef MACHINE_TYPE
1263 #define MACHINE_TYPE "BSD Mips"
1266 #ifndef TARGET_VERSION_INTERNAL
1267 #define TARGET_VERSION_INTERNAL(STREAM) \
1268 fprintf (STREAM, " %s %s", MIPS_VERSION, MACHINE_TYPE)
1271 #ifndef TARGET_VERSION
1272 #define TARGET_VERSION TARGET_VERSION_INTERNAL (stderr)
1276 #define SDB_DEBUGGING_INFO 1 /* generate info for mips-tfile */
1277 #define DBX_DEBUGGING_INFO 1 /* generate stabs (OSF/rose) */
1278 #define MIPS_DEBUGGING_INFO 1 /* MIPS specific debugging info */
1280 #ifndef PREFERRED_DEBUGGING_TYPE /* assume SDB_DEBUGGING_INFO */
1281 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
1284 /* By default, turn on GDB extensions. */
1285 #define DEFAULT_GDB_EXTENSIONS 1
1287 /* If we are passing smuggling stabs through the MIPS ECOFF object
1288 format, put a comment in front of the .stab<x> operation so
1289 that the MIPS assembler does not choke. The mips-tfile program
1290 will correctly put the stab into the object file. */
1292 #define ASM_STABS_OP ((TARGET_GAS) ? "\t.stabs\t" : " #.stabs\t")
1293 #define ASM_STABN_OP ((TARGET_GAS) ? "\t.stabn\t" : " #.stabn\t")
1294 #define ASM_STABD_OP ((TARGET_GAS) ? "\t.stabd\t" : " #.stabd\t")
1296 /* Local compiler-generated symbols must have a prefix that the assembler
1297 understands. By default, this is $, although some targets (e.g.,
1298 NetBSD-ELF) need to override this. */
1300 #ifndef LOCAL_LABEL_PREFIX
1301 #define LOCAL_LABEL_PREFIX "$"
1304 /* By default on the mips, external symbols do not have an underscore
1305 prepended, but some targets (e.g., NetBSD) require this. */
1307 #ifndef USER_LABEL_PREFIX
1308 #define USER_LABEL_PREFIX ""
1311 /* Forward references to tags are allowed. */
1312 #define SDB_ALLOW_FORWARD_REFERENCES
1314 /* Unknown tags are also allowed. */
1315 #define SDB_ALLOW_UNKNOWN_REFERENCES
1317 /* On Sun 4, this limit is 2048. We use 1500 to be safe,
1318 since the length can run past this up to a continuation point. */
1319 #undef DBX_CONTIN_LENGTH
1320 #define DBX_CONTIN_LENGTH 1500
1322 /* How to renumber registers for dbx and gdb. */
1323 #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[ (REGNO) ]
1325 /* The mapping from gcc register number to DWARF 2 CFA column number.
1326 This mapping does not allow for tracking register 0, since SGI's broken
1327 dwarf reader thinks column 0 is used for the frame address, but since
1328 register 0 is fixed this is not a problem. */
1329 #define DWARF_FRAME_REGNUM(REG) \
1330 (REG == GP_REG_FIRST + 31 ? DWARF_FRAME_RETURN_COLUMN : REG)
1332 /* The DWARF 2 CFA column which tracks the return address. */
1333 #define DWARF_FRAME_RETURN_COLUMN (FP_REG_LAST + 1)
1335 /* Before the prologue, RA lives in r31. */
1336 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, GP_REG_FIRST + 31)
1338 /* Describe how we implement __builtin_eh_return. */
1339 #define EH_RETURN_DATA_REGNO(N) ((N) < (TARGET_MIPS16 ? 2 : 4) ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
1340 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_REG_FIRST + 3)
1342 /* Offsets recorded in opcodes are a multiple of this alignment factor.
1343 The default for this in 64-bit mode is 8, which causes problems with
1344 SFmode register saves. */
1345 #define DWARF_CIE_DATA_ALIGNMENT 4
1347 #define FIND_BASE_TERM(X) mips_delegitimize_address (X)
1349 /* Overrides for the COFF debug format. */
1350 #define PUT_SDB_SCL(a) \
1352 extern FILE *asm_out_text_file; \
1353 fprintf (asm_out_text_file, "\t.scl\t%d;", (a)); \
1356 #define PUT_SDB_INT_VAL(a) \
1358 extern FILE *asm_out_text_file; \
1359 fprintf (asm_out_text_file, "\t.val\t" HOST_WIDE_INT_PRINT_DEC ";", \
1360 (HOST_WIDE_INT)(a)); \
1363 #define PUT_SDB_VAL(a) \
1365 extern FILE *asm_out_text_file; \
1366 fputs ("\t.val\t", asm_out_text_file); \
1367 output_addr_const (asm_out_text_file, (a)); \
1368 fputc (';', asm_out_text_file); \
1371 #define PUT_SDB_DEF(a) \
1373 extern FILE *asm_out_text_file; \
1374 fprintf (asm_out_text_file, "\t%s.def\t", \
1375 (TARGET_GAS) ? "" : "#"); \
1376 ASM_OUTPUT_LABELREF (asm_out_text_file, a); \
1377 fputc (';', asm_out_text_file); \
1380 #define PUT_SDB_PLAIN_DEF(a) \
1382 extern FILE *asm_out_text_file; \
1383 fprintf (asm_out_text_file, "\t%s.def\t.%s;", \
1384 (TARGET_GAS) ? "" : "#", (a)); \
1387 #define PUT_SDB_ENDEF \
1389 extern FILE *asm_out_text_file; \
1390 fprintf (asm_out_text_file, "\t.endef\n"); \
1393 #define PUT_SDB_TYPE(a) \
1395 extern FILE *asm_out_text_file; \
1396 fprintf (asm_out_text_file, "\t.type\t0x%x;", (a)); \
1399 #define PUT_SDB_SIZE(a) \
1401 extern FILE *asm_out_text_file; \
1402 fprintf (asm_out_text_file, "\t.size\t" HOST_WIDE_INT_PRINT_DEC ";", \
1403 (HOST_WIDE_INT)(a)); \
1406 #define PUT_SDB_DIM(a) \
1408 extern FILE *asm_out_text_file; \
1409 fprintf (asm_out_text_file, "\t.dim\t%d;", (a)); \
1412 #ifndef PUT_SDB_START_DIM
1413 #define PUT_SDB_START_DIM \
1415 extern FILE *asm_out_text_file; \
1416 fprintf (asm_out_text_file, "\t.dim\t"); \
1420 #ifndef PUT_SDB_NEXT_DIM
1421 #define PUT_SDB_NEXT_DIM(a) \
1423 extern FILE *asm_out_text_file; \
1424 fprintf (asm_out_text_file, "%d,", a); \
1428 #ifndef PUT_SDB_LAST_DIM
1429 #define PUT_SDB_LAST_DIM(a) \
1431 extern FILE *asm_out_text_file; \
1432 fprintf (asm_out_text_file, "%d;", a); \
1436 #define PUT_SDB_TAG(a) \
1438 extern FILE *asm_out_text_file; \
1439 fprintf (asm_out_text_file, "\t.tag\t"); \
1440 ASM_OUTPUT_LABELREF (asm_out_text_file, a); \
1441 fputc (';', asm_out_text_file); \
1444 /* For block start and end, we create labels, so that
1445 later we can figure out where the correct offset is.
1446 The normal .ent/.end serve well enough for functions,
1447 so those are just commented out. */
1449 #define PUT_SDB_BLOCK_START(LINE) \
1451 extern FILE *asm_out_text_file; \
1452 fprintf (asm_out_text_file, \
1453 "%sLb%d:\n\t%s.begin\t%sLb%d\t%d\n", \
1454 LOCAL_LABEL_PREFIX, \
1456 (TARGET_GAS) ? "" : "#", \
1457 LOCAL_LABEL_PREFIX, \
1460 sdb_label_count++; \
1463 #define PUT_SDB_BLOCK_END(LINE) \
1465 extern FILE *asm_out_text_file; \
1466 fprintf (asm_out_text_file, \
1467 "%sLe%d:\n\t%s.bend\t%sLe%d\t%d\n", \
1468 LOCAL_LABEL_PREFIX, \
1470 (TARGET_GAS) ? "" : "#", \
1471 LOCAL_LABEL_PREFIX, \
1474 sdb_label_count++; \
1477 #define PUT_SDB_FUNCTION_START(LINE)
1479 #define PUT_SDB_FUNCTION_END(LINE) \
1481 extern FILE *asm_out_text_file; \
1482 ASM_OUTPUT_SOURCE_LINE (asm_out_text_file, LINE + sdb_begin_function_line); \
1485 #define PUT_SDB_EPILOGUE_END(NAME)
1487 #define PUT_SDB_SRC_FILE(FILENAME) \
1489 extern FILE *asm_out_text_file; \
1490 output_file_directive (asm_out_text_file, (FILENAME));\
1493 #define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
1494 sprintf ((BUFFER), ".%dfake", (NUMBER));
1496 /* Correct the offset of automatic variables and arguments. Note that
1497 the MIPS debug format wants all automatic variables and arguments
1498 to be in terms of the virtual frame pointer (stack pointer before
1499 any adjustment in the function), while the MIPS 3.0 linker wants
1500 the frame pointer to be the stack pointer after the initial
1503 #define DEBUGGER_AUTO_OFFSET(X) \
1504 mips_debugger_offset (X, (HOST_WIDE_INT) 0)
1505 #define DEBUGGER_ARG_OFFSET(OFFSET, X) \
1506 mips_debugger_offset (X, (HOST_WIDE_INT) OFFSET)
1508 /* Tell collect that the object format is ECOFF */
1509 #define OBJECT_FORMAT_COFF /* Object file looks like COFF */
1510 #define EXTENDED_COFF /* ECOFF, not normal coff */
1512 /* Target machine storage layout */
1514 /* Define this if most significant bit is lowest numbered
1515 in instructions that operate on numbered bit-fields.
1517 #define BITS_BIG_ENDIAN 0
1519 /* Define this if most significant byte of a word is the lowest numbered. */
1520 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1522 /* Define this if most significant word of a multiword number is the lowest. */
1523 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1525 /* Define this to set the endianness to use in libgcc2.c, which can
1526 not depend on target_flags. */
1527 #if !defined(MIPSEL) && !defined(__MIPSEL__)
1528 #define LIBGCC2_WORDS_BIG_ENDIAN 1
1530 #define LIBGCC2_WORDS_BIG_ENDIAN 0
1533 #define MAX_BITS_PER_WORD 64
1535 /* Width of a word, in units (bytes). */
1536 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
1537 #define MIN_UNITS_PER_WORD 4
1539 /* For MIPS, width of a floating point register. */
1540 #define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4)
1542 /* If register $f0 holds a floating-point value, $f(0 + FP_INC) is
1543 the next available register. */
1544 #define FP_INC (TARGET_FLOAT64 || TARGET_SINGLE_FLOAT ? 1 : 2)
1546 /* The largest size of value that can be held in floating-point
1547 registers and moved with a single instruction. */
1548 #define UNITS_PER_HWFPVALUE (TARGET_SOFT_FLOAT ? 0 : FP_INC * UNITS_PER_FPREG)
1550 /* The largest size of value that can be held in floating-point
1552 #define UNITS_PER_FPVALUE \
1553 (TARGET_SOFT_FLOAT ? 0 : (LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT))
1555 /* The number of bytes in a double. */
1556 #define UNITS_PER_DOUBLE (TYPE_PRECISION (double_type_node) / BITS_PER_UNIT)
1558 /* A C expression for the size in bits of the type `int' on the
1559 target machine. If you don't define this, the default is one
1561 #define INT_TYPE_SIZE (TARGET_INT64 ? 64 : 32)
1563 /* Tell the preprocessor the maximum size of wchar_t. */
1564 #ifndef MAX_WCHAR_TYPE_SIZE
1565 #ifndef WCHAR_TYPE_SIZE
1566 #define MAX_WCHAR_TYPE_SIZE 64
1570 /* A C expression for the size in bits of the type `short' on the
1571 target machine. If you don't define this, the default is half a
1572 word. (If this would be less than one storage unit, it is
1573 rounded up to one unit.) */
1574 #define SHORT_TYPE_SIZE 16
1576 /* A C expression for the size in bits of the type `long' on the
1577 target machine. If you don't define this, the default is one
1579 #define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32)
1580 #define MAX_LONG_TYPE_SIZE 64
1582 /* A C expression for the size in bits of the type `long long' on the
1583 target machine. If you don't define this, the default is two
1585 #define LONG_LONG_TYPE_SIZE 64
1587 /* A C expression for the size in bits of the type `float' on the
1588 target machine. If you don't define this, the default is one
1590 #define FLOAT_TYPE_SIZE 32
1592 /* A C expression for the size in bits of the type `double' on the
1593 target machine. If you don't define this, the default is two
1595 #define DOUBLE_TYPE_SIZE 64
1597 /* A C expression for the size in bits of the type `long double' on
1598 the target machine. If you don't define this, the default is two
1600 #define LONG_DOUBLE_TYPE_SIZE \
1601 (mips_abi == ABI_N32 || mips_abi == ABI_64 ? 128 : 64)
1603 /* long double is not a fixed mode, but the idea is that, if we
1604 support long double, we also want a 128-bit integer type. */
1605 #define MAX_FIXED_MODE_SIZE LONG_DOUBLE_TYPE_SIZE
1608 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
1609 || (defined _ABI64 && _MIPS_SIM == _ABI64)
1610 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
1612 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
1616 /* Width in bits of a pointer. */
1617 #ifndef POINTER_SIZE
1618 #define POINTER_SIZE ((TARGET_LONG64 && TARGET_64BIT) ? 64 : 32)
1621 #define POINTERS_EXTEND_UNSIGNED 0
1623 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
1624 #define PARM_BOUNDARY ((mips_abi == ABI_O64 || mips_abi == ABI_N32 \
1625 || mips_abi == ABI_64 \
1626 || (mips_abi == ABI_EABI && TARGET_64BIT)) ? 64 : 32)
1629 /* Allocation boundary (in *bits*) for the code of a function. */
1630 #define FUNCTION_BOUNDARY 32
1632 /* Alignment of field after `int : 0' in a structure. */
1633 #define EMPTY_FIELD_BOUNDARY 32
1635 /* Every structure's size must be a multiple of this. */
1636 /* 8 is observed right on a DECstation and on riscos 4.02. */
1637 #define STRUCTURE_SIZE_BOUNDARY 8
1639 /* There is no point aligning anything to a rounder boundary than this. */
1640 #define BIGGEST_ALIGNMENT LONG_DOUBLE_TYPE_SIZE
1642 /* Set this nonzero if move instructions will actually fail to work
1643 when given unaligned data. */
1644 #define STRICT_ALIGNMENT 1
1646 /* Define this if you wish to imitate the way many other C compilers
1647 handle alignment of bitfields and the structures that contain
1650 The behavior is that the type written for a bit-field (`int',
1651 `short', or other integer type) imposes an alignment for the
1652 entire structure, as if the structure really did contain an
1653 ordinary field of that type. In addition, the bit-field is placed
1654 within the structure so that it would fit within such a field,
1655 not crossing a boundary for it.
1657 Thus, on most machines, a bit-field whose type is written as `int'
1658 would not cross a four-byte boundary, and would force four-byte
1659 alignment for the whole structure. (The alignment used may not
1660 be four bytes; it is controlled by the other alignment
1663 If the macro is defined, its definition should be a C expression;
1664 a nonzero value for the expression enables this behavior. */
1666 #define PCC_BITFIELD_TYPE_MATTERS 1
1668 /* If defined, a C expression to compute the alignment given to a
1669 constant that is being placed in memory. CONSTANT is the constant
1670 and ALIGN is the alignment that the object would ordinarily have.
1671 The value of this macro is used instead of that alignment to align
1674 If this macro is not defined, then ALIGN is used.
1676 The typical use of this macro is to increase alignment for string
1677 constants to be word aligned so that `strcpy' calls that copy
1678 constants can be done inline. */
1680 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
1681 ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
1682 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
1684 /* If defined, a C expression to compute the alignment for a static
1685 variable. TYPE is the data type, and ALIGN is the alignment that
1686 the object would ordinarily have. The value of this macro is used
1687 instead of that alignment to align the object.
1689 If this macro is not defined, then ALIGN is used.
1691 One use of this macro is to increase alignment of medium-size
1692 data to make it all fit in fewer cache lines. Another is to
1693 cause character arrays to be word-aligned so that `strcpy' calls
1694 that copy constants to character arrays can be done inline. */
1696 #undef DATA_ALIGNMENT
1697 #define DATA_ALIGNMENT(TYPE, ALIGN) \
1698 ((((ALIGN) < BITS_PER_WORD) \
1699 && (TREE_CODE (TYPE) == ARRAY_TYPE \
1700 || TREE_CODE (TYPE) == UNION_TYPE \
1701 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
1704 /* Force right-alignment for small varargs in 32 bit little_endian mode */
1706 #define PAD_VARARGS_DOWN (TARGET_64BIT ? BYTES_BIG_ENDIAN : !BYTES_BIG_ENDIAN)
1708 /* Define this macro if an argument declared as `char' or `short' in a
1709 prototype should actually be passed as an `int'. In addition to
1710 avoiding errors in certain cases of mismatch, it also makes for
1711 better code on certain machines. */
1713 #define PROMOTE_PROTOTYPES 1
1715 /* Define if operations between registers always perform the operation
1716 on the full register even if a narrower mode is specified. */
1717 #define WORD_REGISTER_OPERATIONS
1719 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
1720 will either zero-extend or sign-extend. The value of this macro should
1721 be the code that says which one of the two operations is implicitly
1724 When in 64 bit mode, mips_move_1word will sign extend SImode and CCmode
1725 moves. All other referces are zero extended. */
1726 #define LOAD_EXTEND_OP(MODE) \
1727 (TARGET_64BIT && ((MODE) == SImode || (MODE) == CCmode) \
1728 ? SIGN_EXTEND : ZERO_EXTEND)
1730 /* Define this macro if it is advisable to hold scalars in registers
1731 in a wider mode than that declared by the program. In such cases,
1732 the value is constrained to be within the bounds of the declared
1733 type, but kept valid in the wider mode. The signedness of the
1734 extension may differ from that of the type. */
1736 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
1737 if (GET_MODE_CLASS (MODE) == MODE_INT \
1738 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
1740 if ((MODE) == SImode) \
1745 /* Define if loading short immediate values into registers sign extends. */
1746 #define SHORT_IMMEDIATES_SIGN_EXTEND
1749 /* Define this if function arguments should also be promoted using the above
1751 #define PROMOTE_FUNCTION_ARGS
1753 /* Likewise, if the function return value is promoted. */
1754 #define PROMOTE_FUNCTION_RETURN
1757 /* Standard register usage. */
1759 /* Number of actual hardware registers.
1760 The hardware registers are assigned numbers for the compiler
1761 from 0 to just below FIRST_PSEUDO_REGISTER.
1762 All registers that the compiler knows about must be given numbers,
1763 even those that are not normally considered general registers.
1765 On the Mips, we have 32 integer registers, 32 floating point
1766 registers, 8 condition code registers, and the special registers
1767 hi, lo, hilo, and rap. Afetr that we have 32 COP0 registers, 32
1768 COP2 registers, and 32 COp3 registers. (COP1 is the floating-point
1769 processor.) The 8 condition code registers are only used if
1770 mips_isa >= 4. The hilo register is only used in 64 bit mode. It
1771 represents a 64 bit value stored as two 32 bit values in the hi and
1772 lo registers; this is the result of the mult instruction. rap is a
1773 pointer to the stack where the return address reg ($31) was stored.
1774 This is needed for C++ exception handling. */
1776 #define FIRST_PSEUDO_REGISTER 176
1778 /* 1 for registers that have pervasive standard uses
1779 and are not available for the register allocator.
1781 On the MIPS, see conventions, page D-2 */
1783 /* Regarding coprocessor registers: without evidence to the contrary,
1784 it's best to assume that each coprocessor register has a unique
1785 use. This can be overridden, in, e.g., override_options() or
1786 CONDITIONAL_REGISTER_USAGE should the assumption be inappropriate
1787 for a particular target. */
1789 #define FIXED_REGISTERS \
1791 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1792 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, \
1793 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1794 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1795 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, \
1796 /* COP0 registers */ \
1797 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1798 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1799 /* COP2 registers */ \
1800 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1801 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1802 /* COP3 registers */ \
1803 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1804 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \
1808 /* Don't mark $31 as a call-clobbered register. The idea is that
1809 it's really the call instructions themselves which clobber $31.
1810 We don't care what the called function does with it afterwards.
1812 This approach makes it easier to implement sibcalls. Unlike normal
1813 calls, sibcalls don't clobber $31, so the register reaches the
1814 called function in tact. EPILOGUE_USES says that $31 is useful
1815 to the called function. */
1817 #define CALL_USED_REGISTERS \
1819 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1820 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, \
1821 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1822 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1823 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1824 /* COP0 registers */ \
1825 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1826 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1827 /* COP2 registers */ \
1828 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1829 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1830 /* COP3 registers */ \
1831 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1832 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \
1835 /* Like `CALL_USED_REGISTERS' but used to overcome a historical
1836 problem which makes CALL_USED_REGISTERS *always* include
1837 all the FIXED_REGISTERS. Until this problem has been
1838 resolved this macro can be used to overcome this situation.
1839 In particular, block_propagate() requires this list
1840 be acurate, or we can remove registers which should be live.
1841 This macro is used in regs_invalidated_by_call. */
1844 #define CALL_REALLY_USED_REGISTERS \
1845 { /* General registers. */ \
1846 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1847 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, \
1848 /* Floating-point registers. */ \
1849 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1850 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1852 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1853 /* COP0 registers */ \
1854 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1855 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1856 /* COP2 registers */ \
1857 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1858 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1859 /* COP3 registers */ \
1860 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1861 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 \
1864 /* Internal macros to classify a register number as to whether it's a
1865 general purpose register, a floating point register, a
1866 multiply/divide register, or a status register. */
1868 #define GP_REG_FIRST 0
1869 #define GP_REG_LAST 31
1870 #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
1871 #define GP_DBX_FIRST 0
1873 #define FP_REG_FIRST 32
1874 #define FP_REG_LAST 63
1875 #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
1876 #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32)
1878 #define MD_REG_FIRST 64
1879 #define MD_REG_LAST 66
1880 #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1)
1881 #define MD_DBX_FIRST (FP_DBX_FIRST + FP_REG_NUM)
1883 #define ST_REG_FIRST 67
1884 #define ST_REG_LAST 74
1885 #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1)
1888 /* FIXME: renumber. */
1889 #define COP0_REG_FIRST 80
1890 #define COP0_REG_LAST 111
1891 #define COP0_REG_NUM (COP0_REG_LAST - COP0_REG_FIRST + 1)
1893 #define COP2_REG_FIRST 112
1894 #define COP2_REG_LAST 143
1895 #define COP2_REG_NUM (COP2_REG_LAST - COP2_REG_FIRST + 1)
1897 #define COP3_REG_FIRST 144
1898 #define COP3_REG_LAST 175
1899 #define COP3_REG_NUM (COP3_REG_LAST - COP3_REG_FIRST + 1)
1900 /* ALL_COP_REG_NUM assumes that COP0,2,and 3 are numbered consecutively. */
1901 #define ALL_COP_REG_NUM (COP3_REG_LAST - COP0_REG_FIRST + 1)
1903 #define AT_REGNUM (GP_REG_FIRST + 1)
1904 #define HI_REGNUM (MD_REG_FIRST + 0)
1905 #define LO_REGNUM (MD_REG_FIRST + 1)
1906 #define HILO_REGNUM (MD_REG_FIRST + 2)
1908 /* FPSW_REGNUM is the single condition code used if mips_isa < 4. If
1909 mips_isa >= 4, it should not be used, and an arbitrary ST_REG
1910 should be used instead. */
1911 #define FPSW_REGNUM ST_REG_FIRST
1913 #define GP_REG_P(REGNO) \
1914 ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
1915 #define M16_REG_P(REGNO) \
1916 (((REGNO) >= 2 && (REGNO) <= 7) || (REGNO) == 16 || (REGNO) == 17)
1917 #define FP_REG_P(REGNO) \
1918 ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
1919 #define MD_REG_P(REGNO) \
1920 ((unsigned int) ((int) (REGNO) - MD_REG_FIRST) < MD_REG_NUM)
1921 #define ST_REG_P(REGNO) \
1922 ((unsigned int) ((int) (REGNO) - ST_REG_FIRST) < ST_REG_NUM)
1923 #define COP0_REG_P(REGNO) \
1924 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < COP0_REG_NUM)
1925 #define COP2_REG_P(REGNO) \
1926 ((unsigned int) ((int) (REGNO) - COP2_REG_FIRST) < COP2_REG_NUM)
1927 #define COP3_REG_P(REGNO) \
1928 ((unsigned int) ((int) (REGNO) - COP3_REG_FIRST) < COP3_REG_NUM)
1929 #define ALL_COP_REG_P(REGNO) \
1930 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < ALL_COP_REG_NUM)
1932 #define FP_REG_RTX_P(X) (GET_CODE (X) == REG && FP_REG_P (REGNO (X)))
1934 /* Return coprocessor number from register number. */
1936 #define COPNUM_AS_CHAR_FROM_REGNUM(REGNO) \
1937 (COP0_REG_P (REGNO) ? '0' : COP2_REG_P (REGNO) ? '2' \
1938 : COP3_REG_P (REGNO) ? '3' : '?')
1940 /* Return number of consecutive hard regs needed starting at reg REGNO
1941 to hold something of mode MODE.
1942 This is ordinarily the length in words of a value of mode MODE
1943 but can be less for certain modes in special long registers.
1945 On the MIPS, all general registers are one word long. Except on
1946 the R4000 with the FR bit set, the floating point uses register
1947 pairs, with the second register not being allocable. */
1949 #define HARD_REGNO_NREGS(REGNO, MODE) mips_hard_regno_nregs (REGNO, MODE)
1951 /* Value is 1 if hard register REGNO can hold a value of machine-mode
1952 MODE. In 32 bit mode, require that DImode and DFmode be in even
1953 registers. For DImode, this makes some of the insns easier to
1954 write, since you don't have to worry about a DImode value in
1955 registers 3 & 4, producing a result in 4 & 5.
1957 To make the code simpler HARD_REGNO_MODE_OK now just references an
1958 array built in override_options. Because machmodes.h is not yet
1959 included before this file is processed, the MODE bound can't be
1962 extern char mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
1964 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1965 mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ]
1967 /* Value is 1 if it is a good idea to tie two pseudo registers
1968 when one has mode MODE1 and one has mode MODE2.
1969 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
1970 for any hard reg, then this must be 0 for correct output. */
1971 #define MODES_TIEABLE_P(MODE1, MODE2) \
1972 ((GET_MODE_CLASS (MODE1) == MODE_FLOAT || \
1973 GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT) \
1974 == (GET_MODE_CLASS (MODE2) == MODE_FLOAT || \
1975 GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT))
1977 /* MIPS pc is not overloaded on a register. */
1978 /* #define PC_REGNUM xx */
1980 /* Register to use for pushing function arguments. */
1981 #define STACK_POINTER_REGNUM (GP_REG_FIRST + 29)
1983 /* Offset from the stack pointer to the first available location. Use
1984 the default value zero. */
1985 /* #define STACK_POINTER_OFFSET 0 */
1987 /* Base register for access to local variables of the function. We
1988 pretend that the frame pointer is $1, and then eliminate it to
1989 HARD_FRAME_POINTER_REGNUM. We can get away with this because $1 is
1990 a fixed register, and will not be used for anything else. */
1991 #define FRAME_POINTER_REGNUM (GP_REG_FIRST + 1)
1993 /* Temporary scratch register for use by the assembler. */
1994 #define ASSEMBLER_SCRATCH_REGNUM (GP_REG_FIRST + 1)
1996 /* $30 is not available on the mips16, so we use $17 as the frame
1998 #define HARD_FRAME_POINTER_REGNUM \
1999 (TARGET_MIPS16 ? GP_REG_FIRST + 17 : GP_REG_FIRST + 30)
2001 /* Value should be nonzero if functions must have frame pointers.
2002 Zero means the frame pointer need not be set up (and parms
2003 may be accessed via the stack pointer) in functions that seem suitable.
2004 This is computed in `reload', in reload1.c. */
2005 #define FRAME_POINTER_REQUIRED (current_function_calls_alloca)
2007 /* Base register for access to arguments of the function. */
2008 #define ARG_POINTER_REGNUM GP_REG_FIRST
2010 /* Register in which static-chain is passed to a function. */
2011 #define STATIC_CHAIN_REGNUM (GP_REG_FIRST + 2)
2013 /* If the structure value address is passed in a register, then
2014 `STRUCT_VALUE_REGNUM' should be the number of that register. */
2015 /* #define STRUCT_VALUE_REGNUM (GP_REG_FIRST + 4) */
2017 /* If the structure value address is not passed in a register, define
2018 `STRUCT_VALUE' as an expression returning an RTX for the place
2019 where the address is passed. If it returns 0, the address is
2020 passed as an "invisible" first argument. */
2021 #define STRUCT_VALUE 0
2023 /* Mips registers used in prologue/epilogue code when the stack frame
2024 is larger than 32K bytes. These registers must come from the
2025 scratch register set, and not used for passing and returning
2026 arguments and any other information used in the calling sequence
2027 (such as pic). Must start at 12, since t0/t3 are parameter passing
2028 registers in the 64 bit ABI. */
2030 #define MIPS_TEMP1_REGNUM (GP_REG_FIRST + 12)
2031 #define MIPS_TEMP2_REGNUM (GP_REG_FIRST + 13)
2033 /* Define this macro if it is as good or better to call a constant
2034 function address than to call an address kept in a register. */
2035 #define NO_FUNCTION_CSE 1
2037 /* Define this macro if it is as good or better for a function to
2038 call itself with an explicit address than to call an address
2039 kept in a register. */
2040 #define NO_RECURSIVE_FUNCTION_CSE 1
2042 /* The register number of the register used to address a table of
2043 static data addresses in memory. In some cases this register is
2044 defined by a processor's "application binary interface" (ABI).
2045 When this macro is defined, RTL is generated for this register
2046 once, as with the stack pointer and frame pointer registers. If
2047 this macro is not defined, it is up to the machine-dependent
2048 files to allocate such a register (if necessary). */
2049 #define PIC_OFFSET_TABLE_REGNUM (GP_REG_FIRST + 28)
2051 #define PIC_FUNCTION_ADDR_REGNUM (GP_REG_FIRST + 25)
2053 /* Define the classes of registers for register constraints in the
2054 machine description. Also define ranges of constants.
2056 One of the classes must always be named ALL_REGS and include all hard regs.
2057 If there is more than one class, another class must be named NO_REGS
2058 and contain no registers.
2060 The name GENERAL_REGS must be the name of a class (or an alias for
2061 another name such as ALL_REGS). This is the class of registers
2062 that is allowed by "g" or "r" in a register constraint.
2063 Also, registers outside this class are allocated only when
2064 instructions express preferences for them.
2066 The classes must be numbered in nondecreasing order; that is,
2067 a larger-numbered class must never be contained completely
2068 in a smaller-numbered class.
2070 For any two classes, it is very desirable that there be another
2071 class that represents their union. */
2075 NO_REGS, /* no registers in set */
2076 M16_NA_REGS, /* mips16 regs not used to pass args */
2077 M16_REGS, /* mips16 directly accessible registers */
2078 T_REG, /* mips16 T register ($24) */
2079 M16_T_REGS, /* mips16 registers plus T register */
2080 PIC_FN_ADDR_REG, /* SVR4 PIC function address register */
2081 LEA_REGS, /* Every GPR except $25 */
2082 GR_REGS, /* integer registers */
2083 FP_REGS, /* floating point registers */
2084 HI_REG, /* hi register */
2085 LO_REG, /* lo register */
2086 HILO_REG, /* hilo register pair for 64 bit mode mult */
2087 MD_REGS, /* multiply/divide registers (hi/lo) */
2088 COP0_REGS, /* generic coprocessor classes */
2091 HI_AND_GR_REGS, /* union classes */
2099 ALL_COP_AND_GR_REGS,
2100 ST_REGS, /* status registers (fp status) */
2101 ALL_REGS, /* all registers */
2102 LIM_REG_CLASSES /* max value + 1 */
2105 #define N_REG_CLASSES (int) LIM_REG_CLASSES
2107 #define GENERAL_REGS GR_REGS
2109 /* An initializer containing the names of the register classes as C
2110 string constants. These names are used in writing some of the
2113 #define REG_CLASS_NAMES \
2120 "PIC_FN_ADDR_REG", \
2128 /* coprocessor registers */ \
2134 "HILO_AND_GR_REGS", \
2136 "COP0_AND_GR_REGS", \
2137 "COP2_AND_GR_REGS", \
2138 "COP3_AND_GR_REGS", \
2140 "ALL_COP_AND_GR_REGS", \
2145 /* An initializer containing the contents of the register classes,
2146 as integers which are bit masks. The Nth integer specifies the
2147 contents of class N. The way the integer MASK is interpreted is
2148 that register R is in the class if `MASK & (1 << R)' is 1.
2150 When the machine has more than 32 registers, an integer does not
2151 suffice. Then the integers are replaced by sub-initializers,
2152 braced groupings containing several integers. Each
2153 sub-initializer must be suitable as an initializer for the type
2154 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
2156 #define REG_CLASS_CONTENTS \
2158 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* no registers */ \
2159 { 0x0003000c, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 nonarg regs */\
2160 { 0x000300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 registers */ \
2161 { 0x01000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 T register */ \
2162 { 0x010300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 and T regs */ \
2163 { 0x02000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* SVR4 PIC function address register */ \
2164 { 0xfdffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* Every other GPR */ \
2165 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* integer registers */ \
2166 { 0x00000000, 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* floating registers*/ \
2167 { 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* hi register */ \
2168 { 0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* lo register */ \
2169 { 0x00000000, 0x00000000, 0x00000004, 0x00000000, 0x00000000, 0x00000000 }, /* hilo register */ \
2170 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* mul/div registers */ \
2171 { 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, /* cop0 registers */ \
2172 { 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, /* cop2 registers */ \
2173 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, /* cop3 registers */ \
2174 { 0xffffffff, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* union classes */ \
2175 { 0xffffffff, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, \
2176 { 0xffffffff, 0x00000000, 0x00000004, 0x00000000, 0x00000000, 0x00000000 }, \
2177 { 0x00000000, 0xffffffff, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, \
2178 { 0xffffffff, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, \
2179 { 0xffffffff, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, \
2180 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, \
2181 { 0x00000000, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
2182 { 0xffffffff, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
2183 { 0x00000000, 0x00000000, 0x000007f8, 0x00000000, 0x00000000, 0x00000000 }, /* status registers */ \
2184 { 0xffffffff, 0xffffffff, 0xffff07ff, 0xffffffff, 0xffffffff, 0x0000ffff } /* all registers */ \
2188 /* A C expression whose value is a register class containing hard
2189 register REGNO. In general there is more that one such class;
2190 choose a class which is "minimal", meaning that no smaller class
2191 also contains the register. */
2193 extern const enum reg_class mips_regno_to_class[];
2195 #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ]
2197 /* A macro whose definition is the name of the class to which a
2198 valid base register must belong. A base register is one used in
2199 an address which is the register value plus a displacement. */
2201 #define BASE_REG_CLASS (TARGET_MIPS16 ? M16_REGS : GR_REGS)
2203 /* A macro whose definition is the name of the class to which a
2204 valid index register must belong. An index register is one used
2205 in an address where its value is either multiplied by a scale
2206 factor or added to another register (as well as added to a
2209 #define INDEX_REG_CLASS NO_REGS
2211 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
2212 registers explicitly used in the rtl to be used as spill registers
2213 but prevents the compiler from extending the lifetime of these
2216 #define SMALL_REGISTER_CLASSES (TARGET_MIPS16)
2218 /* This macro is used later on in the file. */
2219 #define GR_REG_CLASS_P(CLASS) \
2220 ((CLASS) == GR_REGS || (CLASS) == M16_REGS || (CLASS) == T_REG \
2221 || (CLASS) == M16_T_REGS || (CLASS) == M16_NA_REGS \
2222 || (CLASS) == PIC_FN_ADDR_REG || (CLASS) == LEA_REGS)
2224 /* This macro is also used later on in the file. */
2225 #define COP_REG_CLASS_P(CLASS) \
2226 ((CLASS) == COP0_REGS || (CLASS) == COP2_REGS || (CLASS) == COP3_REGS)
2228 /* REG_ALLOC_ORDER is to order in which to allocate registers. This
2229 is the default value (allocate the registers in numeric order). We
2230 define it just so that we can override it for the mips16 target in
2231 ORDER_REGS_FOR_LOCAL_ALLOC. */
2233 #define REG_ALLOC_ORDER \
2234 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \
2235 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, \
2236 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \
2237 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \
2238 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
2239 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \
2240 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \
2241 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, \
2242 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, \
2243 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, \
2244 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175 \
2247 /* ORDER_REGS_FOR_LOCAL_ALLOC is a macro which permits reg_alloc_order
2248 to be rearranged based on a particular function. On the mips16, we
2249 want to allocate $24 (T_REG) before other registers for
2250 instructions for which it is possible. */
2252 #define ORDER_REGS_FOR_LOCAL_ALLOC mips_order_regs_for_local_alloc ()
2254 /* REGISTER AND CONSTANT CLASSES */
2256 /* Get reg_class from a letter such as appears in the machine
2259 DEFINED REGISTER CLASSES:
2261 'd' General (aka integer) registers
2262 Normally this is GR_REGS, but in mips16 mode this is M16_REGS
2263 'y' General registers (in both mips16 and non mips16 mode)
2264 'e' mips16 non argument registers (M16_NA_REGS)
2265 't' mips16 temporary register ($24)
2266 'f' Floating point registers
2269 'x' Multiply/divide registers
2271 'z' FP Status register
2275 'b' All registers */
2277 extern enum reg_class mips_char_to_class[256];
2279 #define REG_CLASS_FROM_LETTER(C) mips_char_to_class[(unsigned char)(C)]
2281 /* True if VALUE is a signed 16-bit number. */
2283 #define SMALL_OPERAND(VALUE) \
2284 ((unsigned HOST_WIDE_INT) (VALUE) + 0x8000 < 0x10000)
2286 /* True if VALUE is an unsigned 16-bit number. */
2288 #define SMALL_OPERAND_UNSIGNED(VALUE) \
2289 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0xffff) == 0)
2291 /* True if VALUE can be loaded into a register using LUI. */
2293 #define LUI_OPERAND(VALUE) \
2294 (((VALUE) | 0x7fff0000) == 0x7fff0000 \
2295 || ((VALUE) | 0x7fff0000) + 0x10000 == 0)
2297 /* Return a value X with the low 16 bits clear, and such that
2298 VALUE - X is a signed 16-bit value. */
2300 #define CONST_HIGH_PART(VALUE) \
2301 (((VALUE) + 0x8000) & ~(unsigned HOST_WIDE_INT) 0xffff)
2303 #define CONST_LOW_PART(VALUE) \
2304 ((VALUE) - CONST_HIGH_PART (VALUE))
2306 #define SMALL_INT(X) SMALL_OPERAND (INTVAL (X))
2307 #define SMALL_INT_UNSIGNED(X) SMALL_OPERAND_UNSIGNED (INTVAL (X))
2308 #define LUI_INT(X) LUI_OPERAND (INTVAL (X))
2310 /* The letters I, J, K, L, M, N, O, and P in a register constraint
2311 string can be used to stand for particular ranges of immediate
2312 operands. This macro defines what the ranges are. C is the
2313 letter, and VALUE is a constant value. Return 1 if VALUE is
2314 in the range specified by C. */
2318 `I' is used for the range of constants an arithmetic insn can
2319 actually contain (16 bits signed integers).
2321 `J' is used for the range which is just zero (ie, $r0).
2323 `K' is used for the range of constants a logical insn can actually
2324 contain (16 bit zero-extended integers).
2326 `L' is used for the range of constants that be loaded with lui
2327 (ie, the bottom 16 bits are zero).
2329 `M' is used for the range of constants that take two words to load
2330 (ie, not matched by `I', `K', and `L').
2332 `N' is used for negative 16 bit constants other than -65536.
2334 `O' is a 15 bit signed integer.
2336 `P' is used for positive 16 bit constants. */
2338 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
2339 ((C) == 'I' ? SMALL_OPERAND (VALUE) \
2340 : (C) == 'J' ? ((VALUE) == 0) \
2341 : (C) == 'K' ? SMALL_OPERAND_UNSIGNED (VALUE) \
2342 : (C) == 'L' ? LUI_OPERAND (VALUE) \
2343 : (C) == 'M' ? (!SMALL_OPERAND (VALUE) \
2344 && !SMALL_OPERAND_UNSIGNED (VALUE) \
2345 && !LUI_OPERAND (VALUE)) \
2346 : (C) == 'N' ? ((unsigned HOST_WIDE_INT) ((VALUE) + 0xffff) < 0xffff) \
2347 : (C) == 'O' ? ((unsigned HOST_WIDE_INT) ((VALUE) + 0x4000) < 0x8000) \
2348 : (C) == 'P' ? ((VALUE) != 0 && (((VALUE) & ~0x0000ffff) == 0)) \
2351 /* Similar, but for floating constants, and defining letters G and H.
2352 Here VALUE is the CONST_DOUBLE rtx itself. */
2356 'G' : Floating point 0 */
2358 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
2360 && (VALUE) == CONST0_RTX (GET_MODE (VALUE)))
2362 /* True if OP is a constant that should not be moved into $25.
2363 We need this because many versions of gas treat 'la $25,foo' as
2364 part of a call sequence and allow a global 'foo' to be lazily bound. */
2366 #define DANGEROUS_FOR_LA25_P(OP) \
2368 && !TARGET_EXPLICIT_RELOCS \
2369 && mips_global_pic_constant_p (OP))
2371 /* Letters in the range `Q' through `U' may be defined in a
2372 machine-dependent fashion to stand for arbitrary operand types.
2373 The machine description macro `EXTRA_CONSTRAINT' is passed the
2374 operand as its first argument and the constraint letter as its
2377 `Q' is for signed 16-bit constants.
2378 `R' is for single-instruction memory references. Note that this
2379 constraint has often been used in linux and glibc code.
2380 `S' is for legitimate constant call addresses.
2381 `T' is for constant move_operands that cannot be safely loaded into $25.
2382 `U' is for constant move_operands that can be safely loaded into $25. */
2384 #define EXTRA_CONSTRAINT(OP,CODE) \
2385 (((CODE) == 'Q') ? const_arith_operand (OP, VOIDmode) \
2386 : ((CODE) == 'R') ? (GET_CODE (OP) == MEM \
2387 && mips_fetch_insns (OP) == 1) \
2388 : ((CODE) == 'S') ? (CONSTANT_P (OP) \
2389 && call_insn_operand (OP, VOIDmode)) \
2390 : ((CODE) == 'T') ? (CONSTANT_P (OP) \
2391 && move_operand (OP, VOIDmode) \
2392 && DANGEROUS_FOR_LA25_P (OP)) \
2393 : ((CODE) == 'U') ? (CONSTANT_P (OP) \
2394 && move_operand (OP, VOIDmode) \
2395 && !DANGEROUS_FOR_LA25_P (OP)) \
2398 /* Given an rtx X being reloaded into a reg required to be
2399 in class CLASS, return the class of reg to actually use.
2400 In general this is just CLASS; but on some machines
2401 in some cases it is preferable to use a more restrictive class. */
2403 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
2404 ((CLASS) != ALL_REGS \
2405 ? (! TARGET_MIPS16 \
2407 : ((CLASS) != GR_REGS \
2410 : ((GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
2411 || GET_MODE_CLASS (GET_MODE (X)) == MODE_COMPLEX_FLOAT) \
2412 ? (TARGET_SOFT_FLOAT \
2413 ? (TARGET_MIPS16 ? M16_REGS : GR_REGS) \
2415 : ((GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
2416 || GET_MODE (X) == VOIDmode) \
2417 ? (TARGET_MIPS16 ? M16_REGS : GR_REGS) \
2420 /* Certain machines have the property that some registers cannot be
2421 copied to some other registers without using memory. Define this
2422 macro on those machines to be a C expression that is nonzero if
2423 objects of mode MODE in registers of CLASS1 can only be copied to
2424 registers of class CLASS2 by storing a register of CLASS1 into
2425 memory and loading that memory location into a register of CLASS2.
2427 Do not define this macro if its value would always be zero. */
2429 #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \
2430 ((!TARGET_DEBUG_H_MODE \
2431 && GET_MODE_CLASS (MODE) == MODE_INT \
2432 && ((CLASS1 == FP_REGS && GR_REG_CLASS_P (CLASS2)) \
2433 || (GR_REG_CLASS_P (CLASS1) && CLASS2 == FP_REGS))) \
2434 || (TARGET_FLOAT64 && !TARGET_64BIT && (MODE) == DFmode \
2435 && ((GR_REG_CLASS_P (CLASS1) && CLASS2 == FP_REGS) \
2436 || (GR_REG_CLASS_P (CLASS2) && CLASS1 == FP_REGS))))
2438 /* The HI and LO registers can only be reloaded via the general
2439 registers. Condition code registers can only be loaded to the
2440 general registers, and from the floating point registers. */
2442 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
2443 mips_secondary_reload_class (CLASS, MODE, X, 1)
2444 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
2445 mips_secondary_reload_class (CLASS, MODE, X, 0)
2447 /* Return the maximum number of consecutive registers
2448 needed to represent mode MODE in a register of class CLASS. */
2450 #define CLASS_MAX_NREGS(CLASS, MODE) mips_class_max_nregs (CLASS, MODE)
2452 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
2453 mips_cannot_change_mode_class (FROM, TO, CLASS)
2455 /* Stack layout; function entry, exit and calling. */
2457 /* Define this if pushing a word on the stack
2458 makes the stack pointer a smaller address. */
2459 #define STACK_GROWS_DOWNWARD
2461 /* Define this if the nominal address of the stack frame
2462 is at the high-address end of the local variables;
2463 that is, each additional local variable allocated
2464 goes at a more negative offset in the frame. */
2465 /* #define FRAME_GROWS_DOWNWARD */
2467 /* Offset within stack frame to start allocating local variables at.
2468 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
2469 first local allocated. Otherwise, it is the offset to the BEGINNING
2470 of the first local allocated. */
2471 #define STARTING_FRAME_OFFSET \
2472 (current_function_outgoing_args_size \
2473 + (TARGET_ABICALLS ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
2475 /* Offset from the stack pointer register to an item dynamically
2476 allocated on the stack, e.g., by `alloca'.
2478 The default value for this macro is `STACK_POINTER_OFFSET' plus the
2479 length of the outgoing arguments. The default is correct for most
2480 machines. See `function.c' for details.
2482 The MIPS ABI states that functions which dynamically allocate the
2483 stack must not have 0 for STACK_DYNAMIC_OFFSET, since it looks like
2484 we are trying to create a second frame pointer to the function, so
2485 allocate some stack space to make it happy.
2487 However, the linker currently complains about linking any code that
2488 dynamically allocates stack space, and there seems to be a bug in
2489 STACK_DYNAMIC_OFFSET, so don't define this right now. */
2492 #define STACK_DYNAMIC_OFFSET(FUNDECL) \
2493 ((current_function_outgoing_args_size == 0 && current_function_calls_alloca) \
2494 ? 4*UNITS_PER_WORD \
2495 : current_function_outgoing_args_size)
2498 /* The return address for the current frame is in r31 if this is a leaf
2499 function. Otherwise, it is on the stack. It is at a variable offset
2500 from sp/fp/ap, so we define a fake hard register rap which is a
2501 poiner to the return address on the stack. This always gets eliminated
2502 during reload to be either the frame pointer or the stack pointer plus
2505 #define RETURN_ADDR_RTX mips_return_addr
2507 /* Since the mips16 ISA mode is encoded in the least-significant bit
2508 of the address, mask it off return addresses for purposes of
2509 finding exception handling regions. */
2511 #define MASK_RETURN_ADDR GEN_INT (-2)
2514 /* Similarly, don't use the least-significant bit to tell pointers to
2515 code from vtable index. */
2517 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
2519 /* If defined, this macro specifies a table of register pairs used to
2520 eliminate unneeded registers that point into the stack frame. If
2521 it is not defined, the only elimination attempted by the compiler
2522 is to replace references to the frame pointer with references to
2525 The definition of this macro is a list of structure
2526 initializations, each of which specifies an original and
2527 replacement register.
2529 On some machines, the position of the argument pointer is not
2530 known until the compilation is completed. In such a case, a
2531 separate hard register must be used for the argument pointer.
2532 This register can be eliminated by replacing it with either the
2533 frame pointer or the argument pointer, depending on whether or not
2534 the frame pointer has been eliminated.
2536 In this case, you might specify:
2537 #define ELIMINABLE_REGS \
2538 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2539 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
2540 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
2542 Note that the elimination of the argument pointer with the stack
2543 pointer is specified first since that is the preferred elimination.
2545 The eliminations to $17 are only used on the mips16. See the
2546 definition of HARD_FRAME_POINTER_REGNUM. */
2548 #define ELIMINABLE_REGS \
2549 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2550 { ARG_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2551 { ARG_POINTER_REGNUM, GP_REG_FIRST + 17}, \
2552 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2553 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2554 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 17}}
2556 /* A C expression that returns nonzero if the compiler is allowed to
2557 try to replace register number FROM-REG with register number
2558 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
2559 defined, and will usually be the constant 1, since most of the
2560 cases preventing register elimination are things that the compiler
2561 already knows about.
2563 When not in mips16 and mips64, we can always eliminate to the
2564 frame pointer. We can eliminate to the stack pointer unless
2565 a frame pointer is needed. In mips16 mode, we need a frame
2566 pointer for a large frame; otherwise, reload may be unable
2567 to compute the address of a local variable, since there is
2568 no way to add a large constant to the stack pointer
2569 without using a temporary register.
2571 In mips16, for some instructions (eg lwu), we can't eliminate the
2572 frame pointer for the stack pointer. These instructions are
2573 only generated in TARGET_64BIT mode.
2576 #define CAN_ELIMINATE(FROM, TO) \
2577 (((TO) == HARD_FRAME_POINTER_REGNUM \
2578 || ((TO) == STACK_POINTER_REGNUM && ! frame_pointer_needed \
2579 && ! (TARGET_MIPS16 && TARGET_64BIT) \
2580 && (! TARGET_MIPS16 \
2581 || compute_frame_size (get_frame_size ()) < 32768))))
2583 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2584 (OFFSET) = mips_initial_elimination_offset ((FROM), (TO))
2586 /* If we generate an insn to push BYTES bytes,
2587 this says how many the stack pointer really advances by.
2588 On the VAX, sp@- in a byte insn really pushes a word. */
2590 /* #define PUSH_ROUNDING(BYTES) 0 */
2592 /* If defined, the maximum amount of space required for outgoing
2593 arguments will be computed and placed into the variable
2594 `current_function_outgoing_args_size'. No space will be pushed
2595 onto the stack for each call; instead, the function prologue
2596 should increase the stack frame size by this amount.
2598 It is not proper to define both `PUSH_ROUNDING' and
2599 `ACCUMULATE_OUTGOING_ARGS'. */
2600 #define ACCUMULATE_OUTGOING_ARGS 1
2602 /* Offset from the argument pointer register to the first argument's
2603 address. On some machines it may depend on the data type of the
2606 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
2607 the first argument's address.
2609 On the MIPS, we must skip the first argument position if we are
2610 returning a structure or a union, to account for its address being
2611 passed in $4. However, at the current time, this produces a compiler
2612 that can't bootstrap, so comment it out for now. */
2615 #define FIRST_PARM_OFFSET(FNDECL) \
2617 && TREE_TYPE (FNDECL) != 0 \
2618 && TREE_TYPE (TREE_TYPE (FNDECL)) != 0 \
2619 && (TREE_CODE (TREE_TYPE (TREE_TYPE (FNDECL))) == RECORD_TYPE \
2620 || TREE_CODE (TREE_TYPE (TREE_TYPE (FNDECL))) == UNION_TYPE) \
2624 #define FIRST_PARM_OFFSET(FNDECL) 0
2627 /* When a parameter is passed in a register, stack space is still
2628 allocated for it. For the MIPS, stack space must be allocated, cf
2629 Asm Lang Prog Guide page 7-8.
2631 BEWARE that some space is also allocated for non existing arguments
2632 in register. In case an argument list is of form GF used registers
2633 are a0 (a2,a3), but we should push over a1... */
2635 #define REG_PARM_STACK_SPACE(FNDECL) \
2636 ((mips_abi == ABI_32 || mips_abi == ABI_O64) \
2637 ? (MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD) - FIRST_PARM_OFFSET (FNDECL) \
2640 /* Define this if it is the responsibility of the caller to
2641 allocate the area reserved for arguments passed in registers.
2642 If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
2643 of this macro is to determine whether the space is included in
2644 `current_function_outgoing_args_size'. */
2645 #define OUTGOING_REG_PARM_STACK_SPACE
2647 #define STACK_BOUNDARY \
2648 ((mips_abi == ABI_32 || mips_abi == ABI_O64 || mips_abi == ABI_EABI) \
2651 /* Make sure 4 words are always allocated on the stack. */
2653 #ifndef STACK_ARGS_ADJUST
2654 #define STACK_ARGS_ADJUST(SIZE) \
2656 if (SIZE.constant < 4 * UNITS_PER_WORD) \
2657 SIZE.constant = 4 * UNITS_PER_WORD; \
2662 /* A C expression that should indicate the number of bytes of its
2663 own arguments that a function pops on returning, or 0
2664 if the function pops no arguments and the caller must therefore
2665 pop them all after the function returns.
2667 FUNDECL is the declaration node of the function (as a tree).
2669 FUNTYPE is a C variable whose value is a tree node that
2670 describes the function in question. Normally it is a node of
2671 type `FUNCTION_TYPE' that describes the data type of the function.
2672 From this it is possible to obtain the data types of the value
2673 and arguments (if known).
2675 When a call to a library function is being considered, FUNTYPE
2676 will contain an identifier node for the library function. Thus,
2677 if you need to distinguish among various library functions, you
2678 can do so by their names. Note that "library function" in this
2679 context means a function used to perform arithmetic, whose name
2680 is known specially in the compiler and was not mentioned in the
2681 C code being compiled.
2683 STACK-SIZE is the number of bytes of arguments passed on the
2684 stack. If a variable number of bytes is passed, it is zero, and
2685 argument popping will always be the responsibility of the
2686 calling function. */
2688 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
2691 /* Symbolic macros for the registers used to return integer and floating
2694 #define GP_RETURN (GP_REG_FIRST + 2)
2695 #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0))
2697 #define MAX_ARGS_IN_REGISTERS \
2698 ((mips_abi == ABI_32 || mips_abi == ABI_O64) ? 4 : 8)
2700 /* Largest possible value of MAX_ARGS_IN_REGISTERS. */
2702 #define BIGGEST_MAX_ARGS_IN_REGISTERS 8
2704 /* Symbolic macros for the first/last argument registers. */
2706 #define GP_ARG_FIRST (GP_REG_FIRST + 4)
2707 #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2708 #define FP_ARG_FIRST (FP_REG_FIRST + 12)
2709 #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2711 /* Define how to find the value returned by a library function
2712 assuming the value has mode MODE. Because we define
2713 PROMOTE_FUNCTION_RETURN, we must promote the mode just as
2714 PROMOTE_MODE does. */
2716 #define LIBCALL_VALUE(MODE) \
2717 mips_function_value (NULL_TREE, NULL, (MODE))
2719 /* Define how to find the value returned by a function.
2720 VALTYPE is the data type of the value (as a tree).
2721 If the precise function being called is known, FUNC is its FUNCTION_DECL;
2722 otherwise, FUNC is 0. */
2724 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2725 mips_function_value ((VALTYPE), (FUNC), VOIDmode)
2727 /* 1 if N is a possible register number for a function value.
2728 On the MIPS, R2 R3 and F0 F2 are the only register thus used.
2729 Currently, R2 and F0 are only implemented here (C has no complex type) */
2731 #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN \
2732 || (LONG_DOUBLE_TYPE_SIZE == 128 && FP_RETURN != GP_RETURN \
2733 && (N) == FP_RETURN + 2))
2735 /* 1 if N is a possible register number for function argument passing.
2736 We have no FP argument registers when soft-float. When FP registers
2737 are 32 bits, we can't directly reference the odd numbered ones. */
2739 #define FUNCTION_ARG_REGNO_P(N) \
2740 ((IN_RANGE((N), GP_ARG_FIRST, GP_ARG_LAST) \
2741 || (IN_RANGE((N), FP_ARG_FIRST, FP_ARG_LAST) \
2742 && ((N) % FP_INC == 0) && mips_abi != ABI_O64)) \
2745 /* A C expression which can inhibit the returning of certain function
2746 values in registers, based on the type of value. A nonzero value says
2747 to return the function value in memory, just as large structures are
2748 always returned. Here TYPE will be a C expression of type
2749 `tree', representing the data type of the value.
2751 Note that values of mode `BLKmode' must be explicitly
2752 handled by this macro. Also, the option `-fpcc-struct-return'
2753 takes effect regardless of this macro. On most systems, it is
2754 possible to leave the macro undefined; this causes a default
2755 definition to be used, whose value is the constant 1 for BLKmode
2756 values, and 0 otherwise.
2758 GCC normally converts 1 byte structures into chars, 2 byte
2759 structs into shorts, and 4 byte structs into ints, and returns
2760 them this way. Defining the following macro overrides this,
2761 to give us MIPS cc compatibility. */
2763 #define RETURN_IN_MEMORY(TYPE) \
2764 mips_return_in_memory (TYPE)
2766 #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
2767 (PRETEND_SIZE) = mips_setup_incoming_varargs (&(CUM), (MODE), \
2770 #define STRICT_ARGUMENT_NAMING (mips_abi != ABI_32 && mips_abi != ABI_O64)
2772 /* Define a data type for recording info about an argument list
2773 during the scan of that argument list. This data type should
2774 hold all necessary information about the function itself
2775 and about the args processed so far, enough to enable macros
2776 such as FUNCTION_ARG to determine where the next arg should go.
2778 This structure has to cope with two different argument allocation
2779 schemes. Most MIPS ABIs view the arguments as a struct, of which the
2780 first N words go in registers and the rest go on the stack. If I < N,
2781 the Ith word might go in Ith integer argument register or the
2782 Ith floating-point one. In some cases, it has to go in both (see
2783 function_arg). For these ABIs, we only need to remember the number
2784 of words passed so far.
2786 The EABI instead allocates the integer and floating-point arguments
2787 separately. The first N words of FP arguments go in FP registers,
2788 the rest go on the stack. Likewise, the first N words of the other
2789 arguments go in integer registers, and the rest go on the stack. We
2790 need to maintain three counts: the number of integer registers used,
2791 the number of floating-point registers used, and the number of words
2792 passed on the stack.
2794 We could keep separate information for the two ABIs (a word count for
2795 the standard ABIs, and three separate counts for the EABI). But it
2796 seems simpler to view the standard ABIs as forms of EABI that do not
2797 allocate floating-point registers.
2799 So for the standard ABIs, the first N words are allocated to integer
2800 registers, and function_arg decides on an argument-by-argument basis
2801 whether that argument should really go in an integer register, or in
2802 a floating-point one. */
2804 typedef struct mips_args {
2805 /* Always true for varargs functions. Otherwise true if at least
2806 one argument has been passed in an integer register. */
2809 /* The number of arguments seen so far. */
2810 unsigned int arg_number;
2812 /* For EABI, the number of integer registers used so far. For other
2813 ABIs, the number of words passed in registers (whether integer
2814 or floating-point). */
2815 unsigned int num_gprs;
2817 /* For EABI, the number of floating-point registers used so far. */
2818 unsigned int num_fprs;
2820 /* The number of words passed on the stack. */
2821 unsigned int stack_words;
2823 /* On the mips16, we need to keep track of which floating point
2824 arguments were passed in general registers, but would have been
2825 passed in the FP regs if this were a 32 bit function, so that we
2826 can move them to the FP regs if we wind up calling a 32 bit
2827 function. We record this information in fp_code, encoded in base
2828 four. A zero digit means no floating point argument, a one digit
2829 means an SFmode argument, and a two digit means a DFmode argument,
2830 and a three digit is not used. The low order digit is the first
2831 argument. Thus 6 == 1 * 4 + 2 means a DFmode argument followed by
2832 an SFmode argument. ??? A more sophisticated approach will be
2833 needed if MIPS_ABI != ABI_32. */
2836 /* True if the function has a prototype. */
2839 /* When a structure does not take up a full register, the argument
2840 should sometimes be shifted left so that it occupies the high part
2841 of the register. These two fields describe an array of ashl
2842 patterns for doing this. See function_arg_advance, which creates
2843 the shift patterns, and function_arg, which returns them when given
2844 a VOIDmode argument. */
2845 unsigned int num_adjusts;
2846 rtx adjust[BIGGEST_MAX_ARGS_IN_REGISTERS];
2849 /* Initialize a variable CUM of type CUMULATIVE_ARGS
2850 for a call to a function whose data type is FNTYPE.
2851 For a library call, FNTYPE is 0.
2855 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
2856 init_cumulative_args (&CUM, FNTYPE, LIBNAME) \
2858 /* Update the data in CUM to advance over an argument
2859 of mode MODE and data type TYPE.
2860 (TYPE is null for libcalls where that information may not be available.) */
2862 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2863 function_arg_advance (&CUM, MODE, TYPE, NAMED)
2865 /* Determine where to put an argument to a function.
2866 Value is zero to push the argument on the stack,
2867 or a hard register in which to store the argument.
2869 MODE is the argument's machine mode.
2870 TYPE is the data type of the argument (as a tree).
2871 This is null for libcalls where that information may
2873 CUM is a variable of type CUMULATIVE_ARGS which gives info about
2874 the preceding args and about the function being called.
2875 NAMED is nonzero if this argument is a named parameter
2876 (otherwise it is an extra parameter matching an ellipsis). */
2878 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2879 function_arg( &CUM, MODE, TYPE, NAMED)
2881 /* For an arg passed partly in registers and partly in memory,
2882 this is the number of registers used.
2883 For args passed entirely in registers or entirely in memory, zero. */
2885 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
2886 function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
2888 /* If defined, a C expression that gives the alignment boundary, in
2889 bits, of an argument with the specified mode and type. If it is
2890 not defined, `PARM_BOUNDARY' is used for all arguments. */
2892 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
2894 ? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY) \
2896 : TYPE_ALIGN(TYPE)) \
2897 : ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY) \
2899 : GET_MODE_ALIGNMENT(MODE)))
2901 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
2902 function_arg_pass_by_reference (&CUM, MODE, TYPE, NAMED)
2904 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
2905 (! BYTES_BIG_ENDIAN \
2907 : (((MODE) == BLKmode \
2908 ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
2909 && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT))\
2910 : (GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY \
2911 && (mips_abi == ABI_32 \
2912 || mips_abi == ABI_O64 \
2913 || mips_abi == ABI_EABI \
2914 || GET_MODE_CLASS (MODE) == MODE_INT))) \
2915 ? downward : upward))
2917 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
2918 (mips_abi == ABI_EABI && (NAMED) \
2919 && FUNCTION_ARG_PASS_BY_REFERENCE (CUM, MODE, TYPE, NAMED))
2921 /* Modified version of the macro in expr.h. */
2922 #define MUST_PASS_IN_STACK(MODE,TYPE) \
2924 && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \
2925 || TREE_ADDRESSABLE (TYPE) \
2926 || ((MODE) == BLKmode \
2927 && mips_abi != ABI_32 && mips_abi != ABI_O64 \
2928 && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
2929 && 0 == (int_size_in_bytes (TYPE) \
2930 % (PARM_BOUNDARY / BITS_PER_UNIT))) \
2931 && (FUNCTION_ARG_PADDING (MODE, TYPE) \
2932 == (BYTES_BIG_ENDIAN ? upward : downward)))))
2934 /* True if using EABI and varargs can be passed in floating-point
2935 registers. Under these conditions, we need a more complex form
2936 of va_list, which tracks GPR, FPR and stack arguments separately. */
2937 #define EABI_FLOAT_VARARGS_P \
2938 (mips_abi == ABI_EABI && UNITS_PER_FPVALUE >= UNITS_PER_DOUBLE)
2941 /* Tell prologue and epilogue if register REGNO should be saved / restored. */
2943 #define MUST_SAVE_REGISTER(regno) \
2944 ((regs_ever_live[regno] && !call_used_regs[regno]) \
2945 || (regno == HARD_FRAME_POINTER_REGNUM && frame_pointer_needed) \
2946 || (regno == (GP_REG_FIRST + 31) && regs_ever_live[GP_REG_FIRST + 31]))
2948 /* Say that the epilogue uses the return address register. Note that
2949 in the case of sibcalls, the values "used by the epilogue" are
2950 considered live at the start of the called function. */
2951 #define EPILOGUE_USES(REGNO) ((REGNO) == 31)
2953 /* Treat LOC as a byte offset from the stack pointer and round it up
2954 to the next fully-aligned offset. */
2955 #define MIPS_STACK_ALIGN(LOC) \
2956 ((mips_abi == ABI_32 || mips_abi == ABI_O64 || mips_abi == ABI_EABI) \
2957 ? ((LOC) + 7) & ~7 \
2958 : ((LOC) + 15) & ~15)
2961 /* Define the `__builtin_va_list' type for the ABI. */
2962 #define BUILD_VA_LIST_TYPE(VALIST) \
2963 (VALIST) = mips_build_va_list ()
2965 /* Implement `va_start' for varargs and stdarg. */
2966 #define EXPAND_BUILTIN_VA_START(valist, nextarg) \
2967 mips_va_start (valist, nextarg)
2969 /* Implement `va_arg'. */
2970 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
2971 mips_va_arg (valist, type)
2973 /* Output assembler code to FILE to increment profiler label # LABELNO
2974 for profiling a function entry. */
2976 #define FUNCTION_PROFILER(FILE, LABELNO) \
2978 if (TARGET_MIPS16) \
2979 sorry ("mips16 function profiling"); \
2980 fprintf (FILE, "\t.set\tnoat\n"); \
2981 fprintf (FILE, "\tmove\t%s,%s\t\t# save current return address\n", \
2982 reg_names[GP_REG_FIRST + 1], reg_names[GP_REG_FIRST + 31]); \
2983 if (mips_abi != ABI_N32 && mips_abi != ABI_64) \
2986 "\t%s\t%s,%s,%d\t\t# _mcount pops 2 words from stack\n", \
2987 TARGET_64BIT ? "dsubu" : "subu", \
2988 reg_names[STACK_POINTER_REGNUM], \
2989 reg_names[STACK_POINTER_REGNUM], \
2990 Pmode == DImode ? 16 : 8); \
2992 fprintf (FILE, "\tjal\t_mcount\n"); \
2993 fprintf (FILE, "\t.set\tat\n"); \
2996 /* Define this macro if the code for function profiling should come
2997 before the function prologue. Normally, the profiling code comes
3000 /* #define PROFILE_BEFORE_PROLOGUE */
3002 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
3003 the stack pointer does not matter. The value is tested only in
3004 functions that have frame pointers.
3005 No definition is equivalent to always zero. */
3007 #define EXIT_IGNORE_STACK 1
3010 /* A C statement to output, on the stream FILE, assembler code for a
3011 block of data that contains the constant parts of a trampoline.
3012 This code should not include a label--the label is taken care of
3015 #define TRAMPOLINE_TEMPLATE(STREAM) \
3017 fprintf (STREAM, "\t.word\t0x03e00821\t\t# move $1,$31\n"); \
3018 fprintf (STREAM, "\t.word\t0x04110001\t\t# bgezal $0,.+8\n"); \
3019 fprintf (STREAM, "\t.word\t0x00000000\t\t# nop\n"); \
3020 if (ptr_mode == DImode) \
3022 fprintf (STREAM, "\t.word\t0xdfe30014\t\t# ld $3,20($31)\n"); \
3023 fprintf (STREAM, "\t.word\t0xdfe2001c\t\t# ld $2,28($31)\n"); \
3027 fprintf (STREAM, "\t.word\t0x8fe30014\t\t# lw $3,20($31)\n"); \
3028 fprintf (STREAM, "\t.word\t0x8fe20018\t\t# lw $2,24($31)\n"); \
3030 fprintf (STREAM, "\t.word\t0x0060c821\t\t# move $25,$3 (abicalls)\n"); \
3031 fprintf (STREAM, "\t.word\t0x00600008\t\t# jr $3\n"); \
3032 fprintf (STREAM, "\t.word\t0x0020f821\t\t# move $31,$1\n"); \
3033 if (ptr_mode == DImode) \
3035 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <function address>\n"); \
3036 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <static chain value>\n"); \
3040 fprintf (STREAM, "\t.word\t0x00000000\t\t# <function address>\n"); \
3041 fprintf (STREAM, "\t.word\t0x00000000\t\t# <static chain value>\n"); \
3045 /* A C expression for the size in bytes of the trampoline, as an
3048 #define TRAMPOLINE_SIZE (32 + GET_MODE_SIZE (ptr_mode) * 2)
3050 /* Alignment required for trampolines, in bits. */
3052 #define TRAMPOLINE_ALIGNMENT GET_MODE_BITSIZE (ptr_mode)
3054 /* INITIALIZE_TRAMPOLINE calls this library function to flush
3055 program and data caches. */
3057 #ifndef CACHE_FLUSH_FUNC
3058 #define CACHE_FLUSH_FUNC "_flush_cache"
3061 /* A C statement to initialize the variable parts of a trampoline.
3062 ADDR is an RTX for the address of the trampoline; FNADDR is an
3063 RTX for the address of the nested function; STATIC_CHAIN is an
3064 RTX for the static chain value that should be passed to the
3065 function when it is called. */
3067 #define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \
3069 rtx func_addr, chain_addr; \
3071 func_addr = plus_constant (ADDR, 32); \
3072 chain_addr = plus_constant (func_addr, GET_MODE_SIZE (ptr_mode)); \
3073 emit_move_insn (gen_rtx_MEM (ptr_mode, func_addr), \
3074 gen_lowpart (ptr_mode, force_reg (Pmode, FUNC))); \
3075 emit_move_insn (gen_rtx_MEM (ptr_mode, chain_addr), \
3076 gen_lowpart (ptr_mode, force_reg (Pmode, CHAIN))); \
3078 /* Flush both caches. We need to flush the data cache in case \
3079 the system has a write-back cache. */ \
3080 /* ??? Should check the return value for errors. */ \
3081 if (mips_cache_flush_func && mips_cache_flush_func[0]) \
3082 emit_library_call (gen_rtx_SYMBOL_REF (Pmode, mips_cache_flush_func), \
3083 0, VOIDmode, 3, ADDR, Pmode, \
3084 GEN_INT (TRAMPOLINE_SIZE), TYPE_MODE (integer_type_node),\
3085 GEN_INT (3), TYPE_MODE (integer_type_node)); \
3088 /* Addressing modes, and classification of registers for them. */
3090 /* These assume that REGNO is a hard or pseudo reg number.
3091 They give nonzero only if REGNO is a hard reg of the suitable class
3092 or a pseudo reg currently allocated to a suitable hard reg.
3093 These definitions are NOT overridden anywhere. */
3095 #define BASE_REG_P(regno, mode) \
3097 ? (M16_REG_P (regno) \
3098 || (regno) == FRAME_POINTER_REGNUM \
3099 || (regno) == ARG_POINTER_REGNUM \
3100 || ((regno) == STACK_POINTER_REGNUM \
3101 && (GET_MODE_SIZE (mode) == 4 \
3102 || GET_MODE_SIZE (mode) == 8))) \
3105 #define GP_REG_OR_PSEUDO_STRICT_P(regno, mode) \
3106 BASE_REG_P((regno < FIRST_PSEUDO_REGISTER) ? (int) regno : reg_renumber[regno], \
3109 #define GP_REG_OR_PSEUDO_NONSTRICT_P(regno, mode) \
3110 (((regno) >= FIRST_PSEUDO_REGISTER) || (BASE_REG_P ((regno), (mode))))
3112 #define REGNO_OK_FOR_INDEX_P(regno) 0
3113 #define REGNO_MODE_OK_FOR_BASE_P(regno, mode) \
3114 GP_REG_OR_PSEUDO_STRICT_P ((regno), (mode))
3116 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
3117 and check its validity for a certain class.
3118 We have two alternate definitions for each of them.
3119 The usual definition accepts all pseudo regs; the other rejects them all.
3120 The symbol REG_OK_STRICT causes the latter definition to be used.
3122 Most source files want to accept pseudo regs in the hope that
3123 they will get allocated to the class that the insn wants them to be in.
3124 Some source files that are used after register allocation
3125 need to be strict. */
3127 #ifndef REG_OK_STRICT
3128 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
3129 mips_reg_mode_ok_for_base_p (X, MODE, 0)
3131 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
3132 mips_reg_mode_ok_for_base_p (X, MODE, 1)
3135 #define REG_OK_FOR_INDEX_P(X) 0
3138 /* Maximum number of registers that can appear in a valid memory address. */
3140 #define MAX_REGS_PER_ADDRESS 1
3142 /* A C compound statement with a conditional `goto LABEL;' executed
3143 if X (an RTX) is a legitimate memory address on the target
3144 machine for a memory operand of mode MODE. */
3147 #define GO_PRINTF(x) fprintf(stderr, (x))
3148 #define GO_PRINTF2(x,y) fprintf(stderr, (x), (y))
3149 #define GO_DEBUG_RTX(x) debug_rtx(x)
3152 #define GO_PRINTF(x)
3153 #define GO_PRINTF2(x,y)
3154 #define GO_DEBUG_RTX(x)
3157 #ifdef REG_OK_STRICT
3158 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
3160 if (mips_legitimate_address_p (MODE, X, 1)) \
3164 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
3166 if (mips_legitimate_address_p (MODE, X, 0)) \
3171 /* Check for constness inline but use mips_legitimate_address_p
3172 to check whether a constant really is an address. */
3174 #define CONSTANT_ADDRESS_P(X) \
3175 (CONSTANT_P (X) && mips_legitimate_address_p (SImode, X, 0))
3178 /* Nonzero if the constant value X is a legitimate general operand.
3179 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
3181 At present, GAS doesn't understand li.[sd], so don't allow it
3182 to be generated at present. Also, the MIPS assembler does not
3183 grok li.d Infinity. */
3185 /* ??? SGI Irix 6 assembler fails for CONST address, so reject them.
3186 Note that the Irix 6 assembler problem may already be fixed.
3187 Note also that the GET_CODE (X) == CONST test catches the mips16
3188 gp pseudo reg (see mips16_gp_pseudo_reg) deciding it is not
3189 a LEGITIMATE_CONSTANT. If we ever want mips16 and ABI_N32 or
3190 ABI_64 to work together, we'll need to fix this. */
3191 #define LEGITIMATE_CONSTANT_P(X) (mips_const_insns (X) > 0)
3193 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
3195 if (mips_legitimize_address (&(X), MODE)) \
3200 /* A C statement or compound statement with a conditional `goto
3201 LABEL;' executed if memory address X (an RTX) can have different
3202 meanings depending on the machine mode of the memory reference it
3205 Autoincrement and autodecrement addresses typically have
3206 mode-dependent effects because the amount of the increment or
3207 decrement is the size of the operand being addressed. Some
3208 machines have other mode-dependent addresses. Many RISC machines
3209 have no mode-dependent addresses.
3211 You may assume that ADDR is a valid address for the machine. */
3213 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
3215 /* This handles the magic '..CURRENT_FUNCTION' symbol, which means
3216 'the start of the function that this code is output in'. */
3218 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
3219 if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
3220 asm_fprintf ((FILE), "%U%s", \
3221 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
3223 asm_fprintf ((FILE), "%U%s", (NAME))
3225 /* The mips16 wants the constant pool to be after the function,
3226 because the PC relative load instructions use unsigned offsets. */
3228 #define CONSTANT_POOL_BEFORE_FUNCTION (! TARGET_MIPS16)
3230 #define ASM_OUTPUT_POOL_EPILOGUE(FILE, FNNAME, FNDECL, SIZE) \
3231 mips_string_length = 0;
3233 /* Specify the machine mode that this machine uses
3234 for the index in the tablejump instruction.
3235 ??? Using HImode in mips16 mode can cause overflow. However, the
3236 overflow is no more likely than the overflow in a branch
3237 instruction. Large functions can currently break in both ways. */
3238 #define CASE_VECTOR_MODE \
3239 (TARGET_MIPS16 ? HImode : ptr_mode)
3241 /* Define as C expression which evaluates to nonzero if the tablejump
3242 instruction expects the table to contain offsets from the address of the
3244 Do not define this if the table should contain absolute addresses. */
3245 #define CASE_VECTOR_PC_RELATIVE (TARGET_MIPS16)
3247 /* Define this as 1 if `char' should by default be signed; else as 0. */
3248 #ifndef DEFAULT_SIGNED_CHAR
3249 #define DEFAULT_SIGNED_CHAR 1
3252 /* Max number of bytes we can move from memory to memory
3253 in one reasonably fast instruction. */
3254 #define MOVE_MAX (TARGET_64BIT ? 8 : 4)
3255 #define MAX_MOVE_MAX 8
3257 /* Define this macro as a C expression which is nonzero if
3258 accessing less than a word of memory (i.e. a `char' or a
3259 `short') is no faster than accessing a word of memory, i.e., if
3260 such access require more than one instruction or if there is no
3261 difference in cost between byte and (aligned) word loads.
3263 On RISC machines, it tends to generate better code to define
3264 this as 1, since it avoids making a QI or HI mode register. */
3265 #define SLOW_BYTE_ACCESS 1
3267 /* We assume that the store-condition-codes instructions store 0 for false
3268 and some other value for true. This is the value stored for true. */
3270 #define STORE_FLAG_VALUE 1
3272 /* Define this to be nonzero if shift instructions ignore all but the low-order
3274 #define SHIFT_COUNT_TRUNCATED 1
3276 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
3277 is done just by pretending it is already truncated. */
3278 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) \
3279 (TARGET_64BIT ? ((INPREC) <= 32 || (OUTPREC) > 32) : 1)
3282 /* Specify the machine mode that pointers have.
3283 After generation of rtl, the compiler makes no further distinction
3284 between pointers and any other objects of this machine mode. */
3287 #define Pmode (TARGET_64BIT && TARGET_LONG64 ? DImode : SImode)
3290 /* Give call MEMs SImode since it is the "most permissive" mode
3291 for both 32-bit and 64-bit targets. */
3293 #define FUNCTION_MODE SImode
3296 /* The cost of loading values from the constant pool. It should be
3297 larger than the cost of any constant we want to synthesise in-line. */
3299 #define CONSTANT_POOL_COST COSTS_N_INSNS (8)
3301 /* A C expression for the cost of moving data from a register in
3302 class FROM to one in class TO. The classes are expressed using
3303 the enumeration values such as `GENERAL_REGS'. A value of 2 is
3304 the default; other values are interpreted relative to that.
3306 It is not required that the cost always equal 2 when FROM is the
3307 same as TO; on some machines it is expensive to move between
3308 registers if they are not general registers.
3310 If reload sees an insn consisting of a single `set' between two
3311 hard registers, and if `REGISTER_MOVE_COST' applied to their
3312 classes returns a value of 2, reload does not check to ensure
3313 that the constraints of the insn are met. Setting a cost of
3314 other than 2 will allow reload to verify that the constraints are
3315 met. You should do this if the `movM' pattern's constraints do
3316 not allow such copying. */
3318 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
3319 mips_register_move_cost (MODE, FROM, TO)
3321 /* ??? Fix this to be right for the R8000. */
3322 #define MEMORY_MOVE_COST(MODE,CLASS,TO_P) \
3323 (((TUNE_MIPS4000 || TUNE_MIPS6000) ? 6 : 4) \
3324 + memory_move_secondary_cost ((MODE), (CLASS), (TO_P)))
3326 /* Define if copies to/from condition code registers should be avoided.
3328 This is needed for the MIPS because reload_outcc is not complete;
3329 it needs to handle cases where the source is a general or another
3330 condition code register. */
3331 #define AVOID_CCMODE_COPIES
3333 /* A C expression for the cost of a branch instruction. A value of
3334 1 is the default; other values are interpreted relative to that. */
3336 /* ??? Fix this to be right for the R8000. */
3337 #define BRANCH_COST \
3339 && (TUNE_MIPS4000 || TUNE_MIPS6000)) \
3342 /* If defined, modifies the length assigned to instruction INSN as a
3343 function of the context in which it is used. LENGTH is an lvalue
3344 that contains the initially computed length of the insn and should
3345 be updated with the correct length of the insn. */
3346 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
3347 ((LENGTH) = mips_adjust_insn_length ((INSN), (LENGTH)))
3350 /* Optionally define this if you have added predicates to
3351 `MACHINE.c'. This macro is called within an initializer of an
3352 array of structures. The first field in the structure is the
3353 name of a predicate and the second field is an array of rtl
3354 codes. For each predicate, list all rtl codes that can be in
3355 expressions matched by the predicate. The list should have a
3356 trailing comma. Here is an example of two entries in the list
3357 for a typical RISC machine:
3359 #define PREDICATE_CODES \
3360 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
3361 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
3363 Defining this macro does not affect the generated code (however,
3364 incorrect definitions that omit an rtl code that may be matched
3365 by the predicate can cause the compiler to malfunction).
3366 Instead, it allows the table built by `genrecog' to be more
3367 compact and efficient, thus speeding up the compiler. The most
3368 important predicates to include in the list specified by this
3369 macro are thoses used in the most insn patterns. */
3371 #define PREDICATE_CODES \
3372 {"uns_arith_operand", { REG, CONST_INT, SUBREG, ADDRESSOF }}, \
3373 {"symbolic_operand", { CONST, SYMBOL_REF, LABEL_REF }}, \
3374 {"const_arith_operand", { CONST, CONST_INT }}, \
3375 {"arith_operand", { REG, CONST_INT, CONST, SUBREG, ADDRESSOF }}, \
3376 {"arith32_operand", { REG, CONST_INT, SUBREG, ADDRESSOF }}, \
3377 {"reg_or_0_operand", { REG, CONST_INT, CONST_DOUBLE, SUBREG, ADDRESSOF }}, \
3378 {"true_reg_or_0_operand", { REG, CONST_INT, CONST_DOUBLE, SUBREG, ADDRESSOF }}, \
3379 {"small_int", { CONST_INT }}, \
3380 {"large_int", { CONST_INT }}, \
3381 {"mips_const_double_ok", { CONST_DOUBLE }}, \
3382 {"const_float_1_operand", { CONST_DOUBLE }}, \
3383 {"simple_memory_operand", { MEM, SUBREG }}, \
3384 {"equality_op", { EQ, NE }}, \
3385 {"cmp_op", { EQ, NE, GT, GE, GTU, GEU, LT, LE, \
3387 {"trap_cmp_op", { EQ, NE, GE, GEU, LT, LTU }}, \
3388 {"pc_or_label_operand", { PC, LABEL_REF }}, \
3389 {"call_insn_operand", { CONST, SYMBOL_REF, LABEL_REF, REG }}, \
3390 {"move_operand", { CONST_INT, CONST_DOUBLE, CONST, \
3391 SYMBOL_REF, LABEL_REF, SUBREG, \
3393 {"consttable_operand", { LABEL_REF, SYMBOL_REF, CONST_INT, \
3394 CONST_DOUBLE, CONST }}, \
3395 {"fcc_register_operand", { REG, SUBREG }}, \
3396 {"hilo_operand", { REG }},
3398 /* A list of predicates that do special things with modes, and so
3399 should not elicit warnings for VOIDmode match_operand. */
3401 #define SPECIAL_MODE_PREDICATES \
3402 "pc_or_label_operand",
3404 /* Control the assembler format that we output. */
3406 /* Output at beginning of assembler file.
3407 If we are optimizing to use the global pointer, create a temporary
3408 file to hold all of the text stuff, and write it out to the end.
3409 This is needed because the MIPS assembler is evidently one pass,
3410 and if it hasn't seen the relevant .comm/.lcomm/.extern/.sdata
3411 declaration when the code is processed, it generates a two
3412 instruction sequence. */
3414 #undef ASM_FILE_START
3415 #define ASM_FILE_START(STREAM) mips_asm_file_start (STREAM)
3417 /* Output to assembler file text saying following lines
3418 may contain character constants, extra white space, comments, etc. */
3421 #define ASM_APP_ON " #APP\n"
3424 /* Output to assembler file text saying following lines
3425 no longer contain unusual constructs. */
3428 #define ASM_APP_OFF " #NO_APP\n"
3431 /* How to refer to registers in assembler output.
3432 This sequence is indexed by compiler's hard-register-number (see above).
3434 In order to support the two different conventions for register names,
3435 we use the name of a table set up in mips.c, which is overwritten
3436 if -mrnames is used. */
3438 #define REGISTER_NAMES \
3440 &mips_reg_names[ 0][0], \
3441 &mips_reg_names[ 1][0], \
3442 &mips_reg_names[ 2][0], \
3443 &mips_reg_names[ 3][0], \
3444 &mips_reg_names[ 4][0], \
3445 &mips_reg_names[ 5][0], \
3446 &mips_reg_names[ 6][0], \
3447 &mips_reg_names[ 7][0], \
3448 &mips_reg_names[ 8][0], \
3449 &mips_reg_names[ 9][0], \
3450 &mips_reg_names[10][0], \
3451 &mips_reg_names[11][0], \
3452 &mips_reg_names[12][0], \
3453 &mips_reg_names[13][0], \
3454 &mips_reg_names[14][0], \
3455 &mips_reg_names[15][0], \
3456 &mips_reg_names[16][0], \
3457 &mips_reg_names[17][0], \
3458 &mips_reg_names[18][0], \
3459 &mips_reg_names[19][0], \
3460 &mips_reg_names[20][0], \
3461 &mips_reg_names[21][0], \
3462 &mips_reg_names[22][0], \
3463 &mips_reg_names[23][0], \
3464 &mips_reg_names[24][0], \
3465 &mips_reg_names[25][0], \
3466 &mips_reg_names[26][0], \
3467 &mips_reg_names[27][0], \
3468 &mips_reg_names[28][0], \
3469 &mips_reg_names[29][0], \
3470 &mips_reg_names[30][0], \
3471 &mips_reg_names[31][0], \
3472 &mips_reg_names[32][0], \
3473 &mips_reg_names[33][0], \
3474 &mips_reg_names[34][0], \
3475 &mips_reg_names[35][0], \
3476 &mips_reg_names[36][0], \
3477 &mips_reg_names[37][0], \
3478 &mips_reg_names[38][0], \
3479 &mips_reg_names[39][0], \
3480 &mips_reg_names[40][0], \
3481 &mips_reg_names[41][0], \
3482 &mips_reg_names[42][0], \
3483 &mips_reg_names[43][0], \
3484 &mips_reg_names[44][0], \
3485 &mips_reg_names[45][0], \
3486 &mips_reg_names[46][0], \
3487 &mips_reg_names[47][0], \
3488 &mips_reg_names[48][0], \
3489 &mips_reg_names[49][0], \
3490 &mips_reg_names[50][0], \
3491 &mips_reg_names[51][0], \
3492 &mips_reg_names[52][0], \
3493 &mips_reg_names[53][0], \
3494 &mips_reg_names[54][0], \
3495 &mips_reg_names[55][0], \
3496 &mips_reg_names[56][0], \
3497 &mips_reg_names[57][0], \
3498 &mips_reg_names[58][0], \
3499 &mips_reg_names[59][0], \
3500 &mips_reg_names[60][0], \
3501 &mips_reg_names[61][0], \
3502 &mips_reg_names[62][0], \
3503 &mips_reg_names[63][0], \
3504 &mips_reg_names[64][0], \
3505 &mips_reg_names[65][0], \
3506 &mips_reg_names[66][0], \
3507 &mips_reg_names[67][0], \
3508 &mips_reg_names[68][0], \
3509 &mips_reg_names[69][0], \
3510 &mips_reg_names[70][0], \
3511 &mips_reg_names[71][0], \
3512 &mips_reg_names[72][0], \
3513 &mips_reg_names[73][0], \
3514 &mips_reg_names[74][0], \
3515 &mips_reg_names[75][0], \
3516 &mips_reg_names[76][0], \
3517 &mips_reg_names[77][0], \
3518 &mips_reg_names[78][0], \
3519 &mips_reg_names[79][0], \
3520 &mips_reg_names[80][0], \
3521 &mips_reg_names[81][0], \
3522 &mips_reg_names[82][0], \
3523 &mips_reg_names[83][0], \
3524 &mips_reg_names[84][0], \
3525 &mips_reg_names[85][0], \
3526 &mips_reg_names[86][0], \
3527 &mips_reg_names[87][0], \
3528 &mips_reg_names[88][0], \
3529 &mips_reg_names[89][0], \
3530 &mips_reg_names[90][0], \
3531 &mips_reg_names[91][0], \
3532 &mips_reg_names[92][0], \
3533 &mips_reg_names[93][0], \
3534 &mips_reg_names[94][0], \
3535 &mips_reg_names[95][0], \
3536 &mips_reg_names[96][0], \
3537 &mips_reg_names[97][0], \
3538 &mips_reg_names[98][0], \
3539 &mips_reg_names[99][0], \
3540 &mips_reg_names[100][0], \
3541 &mips_reg_names[101][0], \
3542 &mips_reg_names[102][0], \
3543 &mips_reg_names[103][0], \
3544 &mips_reg_names[104][0], \
3545 &mips_reg_names[105][0], \
3546 &mips_reg_names[106][0], \
3547 &mips_reg_names[107][0], \
3548 &mips_reg_names[108][0], \
3549 &mips_reg_names[109][0], \
3550 &mips_reg_names[110][0], \
3551 &mips_reg_names[111][0], \
3552 &mips_reg_names[112][0], \
3553 &mips_reg_names[113][0], \
3554 &mips_reg_names[114][0], \
3555 &mips_reg_names[115][0], \
3556 &mips_reg_names[116][0], \
3557 &mips_reg_names[117][0], \
3558 &mips_reg_names[118][0], \
3559 &mips_reg_names[119][0], \
3560 &mips_reg_names[120][0], \
3561 &mips_reg_names[121][0], \
3562 &mips_reg_names[122][0], \
3563 &mips_reg_names[123][0], \
3564 &mips_reg_names[124][0], \
3565 &mips_reg_names[125][0], \
3566 &mips_reg_names[126][0], \
3567 &mips_reg_names[127][0], \
3568 &mips_reg_names[128][0], \
3569 &mips_reg_names[129][0], \
3570 &mips_reg_names[130][0], \
3571 &mips_reg_names[131][0], \
3572 &mips_reg_names[132][0], \
3573 &mips_reg_names[133][0], \
3574 &mips_reg_names[134][0], \
3575 &mips_reg_names[135][0], \
3576 &mips_reg_names[136][0], \
3577 &mips_reg_names[137][0], \
3578 &mips_reg_names[138][0], \
3579 &mips_reg_names[139][0], \
3580 &mips_reg_names[140][0], \
3581 &mips_reg_names[141][0], \
3582 &mips_reg_names[142][0], \
3583 &mips_reg_names[143][0], \
3584 &mips_reg_names[144][0], \
3585 &mips_reg_names[145][0], \
3586 &mips_reg_names[146][0], \
3587 &mips_reg_names[147][0], \
3588 &mips_reg_names[148][0], \
3589 &mips_reg_names[149][0], \
3590 &mips_reg_names[150][0], \
3591 &mips_reg_names[151][0], \
3592 &mips_reg_names[152][0], \
3593 &mips_reg_names[153][0], \
3594 &mips_reg_names[154][0], \
3595 &mips_reg_names[155][0], \
3596 &mips_reg_names[156][0], \
3597 &mips_reg_names[157][0], \
3598 &mips_reg_names[158][0], \
3599 &mips_reg_names[159][0], \
3600 &mips_reg_names[160][0], \
3601 &mips_reg_names[161][0], \
3602 &mips_reg_names[162][0], \
3603 &mips_reg_names[163][0], \
3604 &mips_reg_names[164][0], \
3605 &mips_reg_names[165][0], \
3606 &mips_reg_names[166][0], \
3607 &mips_reg_names[167][0], \
3608 &mips_reg_names[168][0], \
3609 &mips_reg_names[169][0], \
3610 &mips_reg_names[170][0], \
3611 &mips_reg_names[171][0], \
3612 &mips_reg_names[172][0], \
3613 &mips_reg_names[173][0], \
3614 &mips_reg_names[174][0], \
3615 &mips_reg_names[175][0] \
3618 /* print-rtl.c can't use REGISTER_NAMES, since it depends on mips.c.
3619 So define this for it. */
3620 #define DEBUG_REGISTER_NAMES \
3622 "$0", "at", "v0", "v1", "a0", "a1", "a2", "a3", \
3623 "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", \
3624 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \
3625 "t8", "t9", "k0", "k1", "gp", "sp", "$fp", "ra", \
3626 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", \
3627 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \
3628 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", \
3629 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31", \
3630 "hi", "lo", "accum","$fcc0","$fcc1","$fcc2","$fcc3","$fcc4", \
3631 "$fcc5","$fcc6","$fcc7","$rap", "", "", "", "", \
3632 "$c0r0", "$c0r1", "$c0r2", "$c0r3", "$c0r4", "$c0r5", "$c0r6", "$c0r7",\
3633 "$c0r8", "$c0r9", "$c0r10","$c0r11","$c0r12","$c0r13","$c0r14","$c0r15",\
3634 "$c0r16","$c0r17","$c0r18","$c0r19","$c0r20","$c0r21","$c0r22","$c0r23",\
3635 "$c0r24","$c0r25","$c0r26","$c0r27","$c0r28","$c0r29","$c0r30","$c0r31",\
3636 "$c2r0", "$c2r1", "$c2r2", "$c2r3", "$c2r4", "$c2r5", "$c2r6", "$c2r7",\
3637 "$c2r8", "$c2r9", "$c2r10","$c2r11","$c2r12","$c2r13","$c2r14","$c2r15",\
3638 "$c2r16","$c2r17","$c2r18","$c2r19","$c2r20","$c2r21","$c2r22","$c2r23",\
3639 "$c2r24","$c2r25","$c2r26","$c2r27","$c2r28","$c2r29","$c2r30","$c2r31",\
3640 "$c3r0", "$c3r1", "$c3r2", "$c3r3", "$c3r4", "$c3r5", "$c3r6", "$c3r7",\
3641 "$c3r8", "$c3r9", "$c3r10","$c3r11","$c3r12","$c3r13","$c3r14","$c3r15",\
3642 "$c3r16","$c3r17","$c3r18","$c3r19","$c3r20","$c3r21","$c3r22","$c3r23",\
3643 "$c3r24","$c3r25","$c3r26","$c3r27","$c3r28","$c3r29","$c3r30","$c3r31"\
3646 /* If defined, a C initializer for an array of structures
3647 containing a name and a register number. This macro defines
3648 additional names for hard registers, thus allowing the `asm'
3649 option in declarations to refer to registers using alternate
3652 We define both names for the integer registers here. */
3654 #define ADDITIONAL_REGISTER_NAMES \
3656 { "$0", 0 + GP_REG_FIRST }, \
3657 { "$1", 1 + GP_REG_FIRST }, \
3658 { "$2", 2 + GP_REG_FIRST }, \
3659 { "$3", 3 + GP_REG_FIRST }, \
3660 { "$4", 4 + GP_REG_FIRST }, \
3661 { "$5", 5 + GP_REG_FIRST }, \
3662 { "$6", 6 + GP_REG_FIRST }, \
3663 { "$7", 7 + GP_REG_FIRST }, \
3664 { "$8", 8 + GP_REG_FIRST }, \
3665 { "$9", 9 + GP_REG_FIRST }, \
3666 { "$10", 10 + GP_REG_FIRST }, \
3667 { "$11", 11 + GP_REG_FIRST }, \
3668 { "$12", 12 + GP_REG_FIRST }, \
3669 { "$13", 13 + GP_REG_FIRST }, \
3670 { "$14", 14 + GP_REG_FIRST }, \
3671 { "$15", 15 + GP_REG_FIRST }, \
3672 { "$16", 16 + GP_REG_FIRST }, \
3673 { "$17", 17 + GP_REG_FIRST }, \
3674 { "$18", 18 + GP_REG_FIRST }, \
3675 { "$19", 19 + GP_REG_FIRST }, \
3676 { "$20", 20 + GP_REG_FIRST }, \
3677 { "$21", 21 + GP_REG_FIRST }, \
3678 { "$22", 22 + GP_REG_FIRST }, \
3679 { "$23", 23 + GP_REG_FIRST }, \
3680 { "$24", 24 + GP_REG_FIRST }, \
3681 { "$25", 25 + GP_REG_FIRST }, \
3682 { "$26", 26 + GP_REG_FIRST }, \
3683 { "$27", 27 + GP_REG_FIRST }, \
3684 { "$28", 28 + GP_REG_FIRST }, \
3685 { "$29", 29 + GP_REG_FIRST }, \
3686 { "$30", 30 + GP_REG_FIRST }, \
3687 { "$31", 31 + GP_REG_FIRST }, \
3688 { "$sp", 29 + GP_REG_FIRST }, \
3689 { "$fp", 30 + GP_REG_FIRST }, \
3690 { "at", 1 + GP_REG_FIRST }, \
3691 { "v0", 2 + GP_REG_FIRST }, \
3692 { "v1", 3 + GP_REG_FIRST }, \
3693 { "a0", 4 + GP_REG_FIRST }, \
3694 { "a1", 5 + GP_REG_FIRST }, \
3695 { "a2", 6 + GP_REG_FIRST }, \
3696 { "a3", 7 + GP_REG_FIRST }, \
3697 { "t0", 8 + GP_REG_FIRST }, \
3698 { "t1", 9 + GP_REG_FIRST }, \
3699 { "t2", 10 + GP_REG_FIRST }, \
3700 { "t3", 11 + GP_REG_FIRST }, \
3701 { "t4", 12 + GP_REG_FIRST }, \
3702 { "t5", 13 + GP_REG_FIRST }, \
3703 { "t6", 14 + GP_REG_FIRST }, \
3704 { "t7", 15 + GP_REG_FIRST }, \
3705 { "s0", 16 + GP_REG_FIRST }, \
3706 { "s1", 17 + GP_REG_FIRST }, \
3707 { "s2", 18 + GP_REG_FIRST }, \
3708 { "s3", 19 + GP_REG_FIRST }, \
3709 { "s4", 20 + GP_REG_FIRST }, \
3710 { "s5", 21 + GP_REG_FIRST }, \
3711 { "s6", 22 + GP_REG_FIRST }, \
3712 { "s7", 23 + GP_REG_FIRST }, \
3713 { "t8", 24 + GP_REG_FIRST }, \
3714 { "t9", 25 + GP_REG_FIRST }, \
3715 { "k0", 26 + GP_REG_FIRST }, \
3716 { "k1", 27 + GP_REG_FIRST }, \
3717 { "gp", 28 + GP_REG_FIRST }, \
3718 { "sp", 29 + GP_REG_FIRST }, \
3719 { "fp", 30 + GP_REG_FIRST }, \
3720 { "ra", 31 + GP_REG_FIRST }, \
3721 { "$sp", 29 + GP_REG_FIRST }, \
3722 { "$fp", 30 + GP_REG_FIRST } \
3723 ALL_COP_ADDITIONAL_REGISTER_NAMES \
3726 /* This is meant to be redefined in the host dependent files. It is a
3727 set of alternative names and regnums for mips coprocessors. */
3729 #define ALL_COP_ADDITIONAL_REGISTER_NAMES
3731 /* A C compound statement to output to stdio stream STREAM the
3732 assembler syntax for an instruction operand X. X is an RTL
3735 CODE is a value that can be used to specify one of several ways
3736 of printing the operand. It is used when identical operands
3737 must be printed differently depending on the context. CODE
3738 comes from the `%' specification that was used to request
3739 printing of the operand. If the specification was just `%DIGIT'
3740 then CODE is 0; if the specification was `%LTR DIGIT' then CODE
3741 is the ASCII code for LTR.
3743 If X is a register, this macro should print the register's name.
3744 The names can be found in an array `reg_names' whose type is
3745 `char *[]'. `reg_names' is initialized from `REGISTER_NAMES'.
3747 When the machine description has a specification `%PUNCT' (a `%'
3748 followed by a punctuation character), this macro is called with
3749 a null pointer for X and the punctuation character for CODE.
3751 See mips.c for the MIPS specific codes. */
3753 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
3755 /* A C expression which evaluates to true if CODE is a valid
3756 punctuation character for use in the `PRINT_OPERAND' macro. If
3757 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no
3758 punctuation characters (except for the standard one, `%') are
3759 used in this way. */
3761 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) mips_print_operand_punct[CODE]
3763 /* A C compound statement to output to stdio stream STREAM the
3764 assembler syntax for an instruction operand that is a memory
3765 reference whose address is ADDR. ADDR is an RTL expression. */
3767 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
3770 /* A C statement, to be executed after all slot-filler instructions
3771 have been output. If necessary, call `dbr_sequence_length' to
3772 determine the number of slots filled in a sequence (zero if not
3773 currently outputting a sequence), to decide how many no-ops to
3774 output, or whatever.
3776 Don't define this macro if it has nothing to do, but it is
3777 helpful in reading assembly output if the extent of the delay
3778 sequence is made explicit (e.g. with white space).
3780 Note that output routines for instructions with delay slots must
3781 be prepared to deal with not being output as part of a sequence
3782 (i.e. when the scheduling pass is not run, or when no slot
3783 fillers could be found.) The variable `final_sequence' is null
3784 when not processing a sequence, otherwise it contains the
3785 `sequence' rtx being output. */
3787 #define DBR_OUTPUT_SEQEND(STREAM) \
3790 if (set_nomacro > 0 && --set_nomacro == 0) \
3791 fputs ("\t.set\tmacro\n", STREAM); \
3793 if (set_noreorder > 0 && --set_noreorder == 0) \
3794 fputs ("\t.set\treorder\n", STREAM); \
3796 fputs ("\n", STREAM); \
3801 /* How to tell the debugger about changes of source files. Note, the
3802 mips ECOFF format cannot deal with changes of files inside of
3803 functions, which means the output of parser generators like bison
3804 is generally not debuggable without using the -l switch. Lose,
3805 lose, lose. Silicon graphics seems to want all .file's hardwired
3808 #ifndef SET_FILE_NUMBER
3809 #define SET_FILE_NUMBER() ++num_source_filenames
3812 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
3813 mips_output_filename (STREAM, NAME)
3815 /* This is defined so that it can be overridden in iris6.h. */
3816 #define ASM_OUTPUT_FILENAME(STREAM, NUM_SOURCE_FILENAMES, NAME) \
3819 fprintf (STREAM, "\t.file\t%d ", NUM_SOURCE_FILENAMES); \
3820 output_quoted_string (STREAM, NAME); \
3821 fputs ("\n", STREAM); \
3825 /* This is how to output a note the debugger telling it the line number
3826 to which the following sequence of instructions corresponds.
3827 Silicon graphics puts a label after each .loc. */
3829 #ifndef LABEL_AFTER_LOC
3830 #define LABEL_AFTER_LOC(STREAM)
3833 #ifndef ASM_OUTPUT_SOURCE_LINE
3834 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \
3835 mips_output_lineno (STREAM, LINE)
3838 /* The MIPS implementation uses some labels for its own purpose. The
3839 following lists what labels are created, and are all formed by the
3840 pattern $L[a-z].*. The machine independent portion of GCC creates
3841 labels matching: $L[A-Z][0-9]+ and $L[0-9]+.
3843 LM[0-9]+ Silicon Graphics/ECOFF stabs label before each stmt.
3844 $Lb[0-9]+ Begin blocks for MIPS debug support
3845 $Lc[0-9]+ Label for use in s<xx> operation.
3846 $Le[0-9]+ End blocks for MIPS debug support */
3848 /* A C statement (sans semicolon) to output to the stdio stream
3849 STREAM any text necessary for declaring the name NAME of an
3850 initialized variable which is being defined. This macro must
3851 output the label definition (perhaps using `ASM_OUTPUT_LABEL').
3852 The argument DECL is the `VAR_DECL' tree node representing the
3855 If this macro is not defined, then the variable name is defined
3856 in the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */
3858 #undef ASM_DECLARE_OBJECT_NAME
3859 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
3862 mips_declare_object (STREAM, NAME, "", ":\n", 0); \
3866 /* Globalizing directive for a label. */
3867 #define GLOBAL_ASM_OP "\t.globl\t"
3869 /* This says how to define a global common symbol. */
3871 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(STREAM, DECL, NAME, SIZE, ALIGN) \
3873 /* If the target wants uninitialized const declarations in \
3874 .rdata then don't put them in .comm */ \
3875 if (TARGET_EMBEDDED_DATA && TARGET_UNINIT_CONST_IN_RODATA \
3876 && TREE_CODE (DECL) == VAR_DECL && TREE_READONLY (DECL) \
3877 && (DECL_INITIAL (DECL) == 0 \
3878 || DECL_INITIAL (DECL) == error_mark_node)) \
3880 if (TREE_PUBLIC (DECL) && DECL_NAME (DECL)) \
3881 (*targetm.asm_out.globalize_label) (STREAM, NAME); \
3883 readonly_data_section (); \
3884 ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT)); \
3885 mips_declare_object (STREAM, NAME, "", ":\n\t.space\t%u\n", \
3889 mips_declare_object (STREAM, NAME, "\n\t.comm\t", ",%u\n", \
3894 /* This says how to define a local common symbol (ie, not visible to
3897 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \
3898 mips_declare_object (STREAM, NAME, "\n\t.lcomm\t", ",%u\n", (int)(SIZE))
3901 /* This says how to output an external. It would be possible not to
3902 output anything and let undefined symbol become external. However
3903 the assembler uses length information on externals to allocate in
3904 data/sdata bss/sbss, thereby saving exec time. */
3906 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \
3907 mips_output_external(STREAM,DECL,NAME)
3909 /* This says what to print at the end of the assembly file */
3911 #define ASM_FILE_END(STREAM) mips_asm_file_end(STREAM)
3914 /* Play switch file games if we're optimizing the global pointer. */
3917 #define TEXT_SECTION() \
3919 extern FILE *asm_out_text_file; \
3920 if (TARGET_FILE_SWITCHING) \
3921 asm_out_file = asm_out_text_file; \
3922 fputs (TEXT_SECTION_ASM_OP, asm_out_file); \
3923 fputc ('\n', asm_out_file); \
3927 /* This is how to declare a function name. The actual work of
3928 emitting the label is moved to function_prologue, so that we can
3929 get the line number correctly emitted before the .ent directive,
3930 and after any .file directives. Define as empty so that the function
3931 is not declared before the .ent directive elsewhere. */
3933 #undef ASM_DECLARE_FUNCTION_NAME
3934 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL)
3936 /* This is how to store into the string LABEL
3937 the symbol_ref name of an internal numbered label where
3938 PREFIX is the class of label and NUM is the number within the class.
3939 This is suitable for output with `assemble_name'. */
3941 #undef ASM_GENERATE_INTERNAL_LABEL
3942 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
3943 sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
3945 /* This is how to output an element of a case-vector that is absolute. */
3947 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
3948 fprintf (STREAM, "\t%s\t%sL%d\n", \
3949 ptr_mode == DImode ? ".dword" : ".word", \
3950 LOCAL_LABEL_PREFIX, \
3953 /* This is how to output an element of a case-vector that is relative.
3954 This is used for pc-relative code (e.g. when TARGET_ABICALLS or
3955 TARGET_EMBEDDED_PIC). */
3957 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
3959 if (TARGET_MIPS16) \
3960 fprintf (STREAM, "\t.half\t%sL%d-%sL%d\n", \
3961 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \
3962 else if (TARGET_EMBEDDED_PIC) \
3963 fprintf (STREAM, "\t%s\t%sL%d-%sLS%d\n", \
3964 ptr_mode == DImode ? ".dword" : ".word", \
3965 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \
3966 else if (TARGET_GPWORD) \
3967 fprintf (STREAM, "\t%s\t%sL%d\n", \
3968 ptr_mode == DImode ? ".gpdword" : ".gpword", \
3969 LOCAL_LABEL_PREFIX, VALUE); \
3971 fprintf (STREAM, "\t%s\t%sL%d\n", \
3972 ptr_mode == DImode ? ".dword" : ".word", \
3973 LOCAL_LABEL_PREFIX, VALUE); \
3976 /* When generating embedded PIC or mips16 code we want to put the jump
3977 table in the .text section. In all other cases, we want to put the
3978 jump table in the .rdata section. Unfortunately, we can't use
3979 JUMP_TABLES_IN_TEXT_SECTION, because it is not conditional.
3980 Instead, we use ASM_OUTPUT_CASE_LABEL to switch back to the .text
3981 section if appropriate. */
3982 #undef ASM_OUTPUT_CASE_LABEL
3983 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, INSN) \
3985 if (TARGET_EMBEDDED_PIC || TARGET_MIPS16) \
3986 function_section (current_function_decl); \
3987 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); \
3990 /* This is how to output an assembler line
3991 that says to advance the location counter
3992 to a multiple of 2**LOG bytes. */
3994 #define ASM_OUTPUT_ALIGN(STREAM,LOG) \
3995 fprintf (STREAM, "\t.align\t%d\n", (LOG))
3997 /* This is how to output an assembler line to advance the location
3998 counter by SIZE bytes. */
4000 #undef ASM_OUTPUT_SKIP
4001 #define ASM_OUTPUT_SKIP(STREAM,SIZE) \
4002 fprintf (STREAM, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))
4004 /* This is how to output a string. */
4005 #undef ASM_OUTPUT_ASCII
4006 #define ASM_OUTPUT_ASCII(STREAM, STRING, LEN) \
4007 mips_output_ascii (STREAM, STRING, LEN)
4009 /* Output #ident as a in the read-only data section. */
4010 #undef ASM_OUTPUT_IDENT
4011 #define ASM_OUTPUT_IDENT(FILE, STRING) \
4013 const char *p = STRING; \
4014 int size = strlen (p) + 1; \
4015 readonly_data_section (); \
4016 assemble_string (p, size); \
4019 /* Default to -G 8 */
4020 #ifndef MIPS_DEFAULT_GVALUE
4021 #define MIPS_DEFAULT_GVALUE 8
4024 /* Define the strings to put out for each section in the object file. */
4025 #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
4026 #define DATA_SECTION_ASM_OP "\t.data" /* large data */
4027 #define SDATA_SECTION_ASM_OP "\t.sdata" /* small data */
4029 #undef READONLY_DATA_SECTION_ASM_OP
4030 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" /* read-only data */
4032 #define SMALL_DATA_SECTION sdata_section
4034 /* What other sections we support other than the normal .data/.text. */
4036 #undef EXTRA_SECTIONS
4037 #define EXTRA_SECTIONS in_sdata
4039 /* Define the additional functions to select our additional sections. */
4041 /* on the MIPS it is not a good idea to put constants in the text
4042 section, since this defeats the sdata/data mechanism. This is
4043 especially true when -O is used. In this case an effort is made to
4044 address with faster (gp) register relative addressing, which can
4045 only get at sdata and sbss items (there is no stext !!) However,
4046 if the constant is too large for sdata, and it's readonly, it
4047 will go into the .rdata section. */
4049 #undef EXTRA_SECTION_FUNCTIONS
4050 #define EXTRA_SECTION_FUNCTIONS \
4054 if (in_section != in_sdata) \
4056 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
4057 in_section = in_sdata; \
4061 /* Given a decl node or constant node, choose the section to output it in
4062 and select that section. */
4064 #undef TARGET_ASM_SELECT_SECTION
4065 #define TARGET_ASM_SELECT_SECTION mips_select_section
4067 #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
4070 fprintf (STREAM, "\t%s\t%s,%s,8\n\t%s\t%s,0(%s)\n", \
4071 TARGET_64BIT ? "dsubu" : "subu", \
4072 reg_names[STACK_POINTER_REGNUM], \
4073 reg_names[STACK_POINTER_REGNUM], \
4074 TARGET_64BIT ? "sd" : "sw", \
4076 reg_names[STACK_POINTER_REGNUM]); \
4080 #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
4083 if (! set_noreorder) \
4084 fprintf (STREAM, "\t.set\tnoreorder\n"); \
4086 fprintf (STREAM, "\t%s\t%s,0(%s)\n\t%s\t%s,%s,8\n", \
4087 TARGET_64BIT ? "ld" : "lw", \
4089 reg_names[STACK_POINTER_REGNUM], \
4090 TARGET_64BIT ? "daddu" : "addu", \
4091 reg_names[STACK_POINTER_REGNUM], \
4092 reg_names[STACK_POINTER_REGNUM]); \
4094 if (! set_noreorder) \
4095 fprintf (STREAM, "\t.set\treorder\n"); \
4099 /* How to start an assembler comment.
4100 The leading space is important (the mips native assembler requires it). */
4101 #ifndef ASM_COMMENT_START
4102 #define ASM_COMMENT_START " #"
4106 /* Macros for mips-tfile.c to encapsulate stabs in ECOFF, and for
4107 and mips-tdump.c to print them out.
4109 These must match the corresponding definitions in gdb/mipsread.c.
4110 Unfortunately, gcc and gdb do not currently share any directories. */
4112 #define CODE_MASK 0x8F300
4113 #define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK)
4114 #define MIPS_MARK_STAB(code) ((code)+CODE_MASK)
4115 #define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK)
4118 /* Default definitions for size_t and ptrdiff_t. We must override the
4119 definitions from ../svr4.h on mips-*-linux-gnu. */
4122 #define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
4125 #ifndef PTRDIFF_TYPE
4126 #define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
4129 /* See mips_expand_prologue's use of loadgp for when this should be
4132 #define DONT_ACCESS_GBLS_AFTER_EPILOGUE (TARGET_ABICALLS \
4133 && mips_abi != ABI_32 \
4134 && mips_abi != ABI_O64)
4136 /* We need to use a special set of functions to handle hard floating
4137 point code in mips16 mode. */
4139 #ifndef INIT_SUBTARGET_OPTABS
4140 #define INIT_SUBTARGET_OPTABS
4143 #define INIT_TARGET_OPTABS \
4146 if (! TARGET_MIPS16 || ! mips16_hard_float) \
4147 INIT_SUBTARGET_OPTABS; \
4150 add_optab->handlers[(int) SFmode].libfunc = \
4151 init_one_libfunc ("__mips16_addsf3"); \
4152 sub_optab->handlers[(int) SFmode].libfunc = \
4153 init_one_libfunc ("__mips16_subsf3"); \
4154 smul_optab->handlers[(int) SFmode].libfunc = \
4155 init_one_libfunc ("__mips16_mulsf3"); \
4156 sdiv_optab->handlers[(int) SFmode].libfunc = \
4157 init_one_libfunc ("__mips16_divsf3"); \
4159 eqsf2_libfunc = init_one_libfunc ("__mips16_eqsf2"); \
4160 nesf2_libfunc = init_one_libfunc ("__mips16_nesf2"); \
4161 gtsf2_libfunc = init_one_libfunc ("__mips16_gtsf2"); \
4162 gesf2_libfunc = init_one_libfunc ("__mips16_gesf2"); \
4163 ltsf2_libfunc = init_one_libfunc ("__mips16_ltsf2"); \
4164 lesf2_libfunc = init_one_libfunc ("__mips16_lesf2"); \
4166 floatsisf_libfunc = \
4167 init_one_libfunc ("__mips16_floatsisf"); \
4169 init_one_libfunc ("__mips16_fixsfsi"); \
4171 if (TARGET_DOUBLE_FLOAT) \
4173 add_optab->handlers[(int) DFmode].libfunc = \
4174 init_one_libfunc ("__mips16_adddf3"); \
4175 sub_optab->handlers[(int) DFmode].libfunc = \
4176 init_one_libfunc ("__mips16_subdf3"); \
4177 smul_optab->handlers[(int) DFmode].libfunc = \
4178 init_one_libfunc ("__mips16_muldf3"); \
4179 sdiv_optab->handlers[(int) DFmode].libfunc = \
4180 init_one_libfunc ("__mips16_divdf3"); \
4182 extendsfdf2_libfunc = \
4183 init_one_libfunc ("__mips16_extendsfdf2"); \
4184 truncdfsf2_libfunc = \
4185 init_one_libfunc ("__mips16_truncdfsf2"); \
4188 init_one_libfunc ("__mips16_eqdf2"); \
4190 init_one_libfunc ("__mips16_nedf2"); \
4192 init_one_libfunc ("__mips16_gtdf2"); \
4194 init_one_libfunc ("__mips16_gedf2"); \
4196 init_one_libfunc ("__mips16_ltdf2"); \
4198 init_one_libfunc ("__mips16_ledf2"); \
4200 floatsidf_libfunc = \
4201 init_one_libfunc ("__mips16_floatsidf"); \
4203 init_one_libfunc ("__mips16_fixdfsi"); \
4209 #define DFMODE_NAN \
4210 unsigned short DFbignan[4] = {0x7ff7, 0xffff, 0xffff, 0xffff}; \
4211 unsigned short DFlittlenan[4] = {0xffff, 0xffff, 0xffff, 0xfff7}
4212 #define SFMODE_NAN \
4213 unsigned short SFbignan[2] = {0x7fbf, 0xffff}; \
4214 unsigned short SFlittlenan[2] = {0xffff, 0xffbf}
4216 /* Generate calls to memcpy, etc., not bcopy, etc. */
4217 #define TARGET_MEM_FUNCTIONS
4220 /* Since the bits of the _init and _fini function is spread across
4221 many object files, each potentially with its own GP, we must assume
4222 we need to load our GP. We don't preserve $gp or $ra, since each
4223 init/fini chunk is supposed to initialize $gp, and crti/crtn
4224 already take care of preserving $ra and, when appropriate, $gp. */
4225 #if _MIPS_SIM == _MIPS_SIM_ABI32
4226 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
4227 asm (SECTION_OP "\n\
4233 jal " USER_LABEL_PREFIX #FUNC "\n\
4234 " TEXT_SECTION_ASM_OP);
4235 #endif /* Switch to #elif when we're no longer limited by K&R C. */
4236 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
4237 || (defined _ABI64 && _MIPS_SIM == _ABI64)
4238 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
4239 asm (SECTION_OP "\n\
4244 .cpsetup $31, $2, 1b\n\
4245 jal " USER_LABEL_PREFIX #FUNC "\n\
4246 " TEXT_SECTION_ASM_OP);