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, 2004, 2005 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 GCC.
11 GCC 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 GCC 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 GCC; see the file COPYING. If not, write to
23 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
24 Boston, MA 02110-1301, USA. */
27 /* MIPS external variables defined in mips.c. */
29 /* Which processor to schedule for. Since there is no difference between
30 a R2000 and R3000 in terms of the scheduler, we collapse them into
31 just an R3000. The elements of the enumeration must match exactly
32 the cpu attribute in the mips.md machine description. */
67 /* Costs of various operations on the different architectures. */
69 struct mips_rtx_cost_data
71 unsigned short fp_add;
72 unsigned short fp_mult_sf;
73 unsigned short fp_mult_df;
74 unsigned short fp_div_sf;
75 unsigned short fp_div_df;
76 unsigned short int_mult_si;
77 unsigned short int_mult_di;
78 unsigned short int_div_si;
79 unsigned short int_div_di;
80 unsigned short branch_cost;
81 unsigned short memory_latency;
84 /* Which ABI to use. ABI_32 (original 32, or o32), ABI_N32 (n32),
85 ABI_64 (n64) are all defined by SGI. ABI_O64 is o32 extended
86 to work on a 64-bit machine. */
94 /* Information about one recognized processor. Defined here for the
95 benefit of TARGET_CPU_CPP_BUILTINS. */
96 struct mips_cpu_info {
97 /* The 'canonical' name of the processor as far as GCC is concerned.
98 It's typically a manufacturer's prefix followed by a numerical
99 designation. It should be lowercase. */
102 /* The internal processor number that most closely matches this
103 entry. Several processors can have the same value, if there's no
104 difference between them from GCC's point of view. */
105 enum processor_type cpu;
107 /* The ISA level that the processor implements. */
111 #ifndef USED_FOR_TARGET
112 extern char mips_print_operand_punct[256]; /* print_operand punctuation chars */
113 extern const char *current_function_file; /* filename current function is in */
114 extern int num_source_filenames; /* current .file # */
115 extern int mips_section_threshold; /* # bytes of data/sdata cutoff */
116 extern int sym_lineno; /* sgi next label # for each stmt */
117 extern int set_noreorder; /* # of nested .set noreorder's */
118 extern int set_nomacro; /* # of nested .set nomacro's */
119 extern int set_noat; /* # of nested .set noat's */
120 extern int set_volatile; /* # of nested .set volatile's */
121 extern int mips_branch_likely; /* emit 'l' after br (branch likely) */
122 extern int mips_dbx_regno[]; /* Map register # to debug register # */
123 extern bool mips_split_p[];
124 extern GTY(()) rtx cmp_operands[2];
125 extern enum processor_type mips_arch; /* which cpu to codegen for */
126 extern enum processor_type mips_tune; /* which cpu to schedule for */
127 extern int mips_isa; /* architectural level */
128 extern int mips_abi; /* which ABI to use */
129 extern int mips16_hard_float; /* mips16 without -msoft-float */
130 extern const struct mips_cpu_info mips_cpu_info_table[];
131 extern const struct mips_cpu_info *mips_arch_info;
132 extern const struct mips_cpu_info *mips_tune_info;
133 extern const struct mips_rtx_cost_data *mips_cost;
136 /* Macros to silence warnings about numbers being signed in traditional
137 C and unsigned in ISO C when compiled on 32-bit hosts. */
139 #define BITMASK_HIGH (((unsigned long)1) << 31) /* 0x80000000 */
140 #define BITMASK_UPPER16 ((unsigned long)0xffff << 16) /* 0xffff0000 */
141 #define BITMASK_LOWER16 ((unsigned long)0xffff) /* 0x0000ffff */
144 /* Run-time compilation parameters selecting different hardware subsets. */
146 /* True if the call patterns should be split into a jalr followed by
147 an instruction to restore $gp. This is only ever true for SVR4 PIC,
148 in which $gp is call-clobbered. It is only safe to split the load
149 from the call when every use of $gp is explicit. */
151 #define TARGET_SPLIT_CALLS \
152 (TARGET_EXPLICIT_RELOCS && TARGET_ABICALLS && !TARGET_NEWABI)
154 /* True if we're generating a form of -mabicalls in which we can use
155 operators like %hi and %lo to refer to locally-binding symbols.
156 We can only do this for -mno-shared, and only then if we can use
157 relocation operations instead of assembly macros. It isn't really
158 worth using absolute sequences for 64-bit symbols because GOT
159 accesses are so much shorter. */
161 #define TARGET_ABSOLUTE_ABICALLS \
164 && TARGET_EXPLICIT_RELOCS \
165 && !ABI_HAS_64BIT_SYMBOLS)
167 /* True if we can optimize sibling calls. For simplicity, we only
168 handle cases in which call_insn_operand will reject invalid
169 sibcall addresses. There are two cases in which this isn't true:
171 - TARGET_MIPS16. call_insn_operand accepts constant addresses
172 but there is no direct jump instruction. It isn't worth
173 using sibling calls in this case anyway; they would usually
174 be longer than normal calls.
176 - TARGET_ABICALLS && !TARGET_EXPLICIT_RELOCS. call_insn_operand
177 accepts global constants, but "jr $25" is the only allowed
180 #define TARGET_SIBCALLS \
181 (!TARGET_MIPS16 && (!TARGET_ABICALLS || TARGET_EXPLICIT_RELOCS))
183 /* True if .gpword or .gpdword should be used for switch tables.
185 Although GAS does understand .gpdword, the SGI linker mishandles
186 the relocations GAS generates (R_MIPS_GPREL32 followed by R_MIPS_64).
187 We therefore disable GP-relative switch tables for n64 on IRIX targets. */
188 #define TARGET_GPWORD (TARGET_ABICALLS && !(mips_abi == ABI_64 && TARGET_IRIX))
190 /* Generate mips16 code */
191 #define TARGET_MIPS16 ((target_flags & MASK_MIPS16) != 0)
192 /* Generate mips16e code. Default 16bit ASE for mips32/mips32r2/mips64 */
193 #define GENERATE_MIPS16E (TARGET_MIPS16 && mips_isa >= 32)
195 /* Generic ISA defines. */
196 #define ISA_MIPS1 (mips_isa == 1)
197 #define ISA_MIPS2 (mips_isa == 2)
198 #define ISA_MIPS3 (mips_isa == 3)
199 #define ISA_MIPS4 (mips_isa == 4)
200 #define ISA_MIPS32 (mips_isa == 32)
201 #define ISA_MIPS32R2 (mips_isa == 33)
202 #define ISA_MIPS64 (mips_isa == 64)
204 /* Architecture target defines. */
205 #define TARGET_MIPS3900 (mips_arch == PROCESSOR_R3900)
206 #define TARGET_MIPS4000 (mips_arch == PROCESSOR_R4000)
207 #define TARGET_MIPS4120 (mips_arch == PROCESSOR_R4120)
208 #define TARGET_MIPS4130 (mips_arch == PROCESSOR_R4130)
209 #define TARGET_MIPS5400 (mips_arch == PROCESSOR_R5400)
210 #define TARGET_MIPS5500 (mips_arch == PROCESSOR_R5500)
211 #define TARGET_MIPS7000 (mips_arch == PROCESSOR_R7000)
212 #define TARGET_MIPS9000 (mips_arch == PROCESSOR_R9000)
213 #define TARGET_SB1 (mips_arch == PROCESSOR_SB1 \
214 || mips_arch == PROCESSOR_SB1A)
215 #define TARGET_SR71K (mips_arch == PROCESSOR_SR71000)
217 /* Scheduling target defines. */
218 #define TUNE_MIPS3000 (mips_tune == PROCESSOR_R3000)
219 #define TUNE_MIPS3900 (mips_tune == PROCESSOR_R3900)
220 #define TUNE_MIPS4000 (mips_tune == PROCESSOR_R4000)
221 #define TUNE_MIPS4120 (mips_tune == PROCESSOR_R4120)
222 #define TUNE_MIPS4130 (mips_tune == PROCESSOR_R4130)
223 #define TUNE_MIPS5000 (mips_tune == PROCESSOR_R5000)
224 #define TUNE_MIPS5400 (mips_tune == PROCESSOR_R5400)
225 #define TUNE_MIPS5500 (mips_tune == PROCESSOR_R5500)
226 #define TUNE_MIPS6000 (mips_tune == PROCESSOR_R6000)
227 #define TUNE_MIPS7000 (mips_tune == PROCESSOR_R7000)
228 #define TUNE_MIPS9000 (mips_tune == PROCESSOR_R9000)
229 #define TUNE_SB1 (mips_tune == PROCESSOR_SB1 \
230 || mips_tune == PROCESSOR_SB1A)
232 /* True if the pre-reload scheduler should try to create chains of
233 multiply-add or multiply-subtract instructions. For example,
241 t1 will have a higher priority than t2 and t3 will have a higher
242 priority than t4. However, before reload, there is no dependence
243 between t1 and t3, and they can often have similar priorities.
244 The scheduler will then tend to prefer:
251 which stops us from making full use of macc/madd-style instructions.
252 This sort of situation occurs frequently in Fourier transforms and
255 To counter this, the TUNE_MACC_CHAINS code will reorder the ready
256 queue so that chained multiply-add and multiply-subtract instructions
257 appear ahead of any other instruction that is likely to clobber lo.
258 In the example above, if t2 and t3 become ready at the same time,
259 the code ensures that t2 is scheduled first.
261 Multiply-accumulate instructions are a bigger win for some targets
262 than others, so this macro is defined on an opt-in basis. */
263 #define TUNE_MACC_CHAINS (TUNE_MIPS5500 \
267 #define TARGET_OLDABI (mips_abi == ABI_32 || mips_abi == ABI_O64)
268 #define TARGET_NEWABI (mips_abi == ABI_N32 || mips_abi == ABI_64)
270 /* IRIX specific stuff. */
271 #define TARGET_IRIX 0
272 #define TARGET_IRIX6 0
274 /* Define preprocessor macros for the -march and -mtune options.
275 PREFIX is either _MIPS_ARCH or _MIPS_TUNE, INFO is the selected
276 processor. If INFO's canonical name is "foo", define PREFIX to
277 be "foo", and define an additional macro PREFIX_FOO. */
278 #define MIPS_CPP_SET_PROCESSOR(PREFIX, INFO) \
283 macro = concat ((PREFIX), "_", (INFO)->name, NULL); \
284 for (p = macro; *p != 0; p++) \
287 builtin_define (macro); \
288 builtin_define_with_value ((PREFIX), (INFO)->name, 1); \
293 /* Target CPU builtins. */
294 #define TARGET_CPU_CPP_BUILTINS() \
297 /* Everyone but IRIX defines this to mips. */ \
299 builtin_assert ("machine=mips"); \
301 builtin_assert ("cpu=mips"); \
302 builtin_define ("__mips__"); \
303 builtin_define ("_mips"); \
305 /* We do this here because __mips is defined below \
306 and so we can't use builtin_define_std. */ \
308 builtin_define ("mips"); \
311 builtin_define ("__mips64"); \
315 /* Treat _R3000 and _R4000 like register-size \
316 defines, which is how they've historically \
320 builtin_define_std ("R4000"); \
321 builtin_define ("_R4000"); \
325 builtin_define_std ("R3000"); \
326 builtin_define ("_R3000"); \
329 if (TARGET_FLOAT64) \
330 builtin_define ("__mips_fpr=64"); \
332 builtin_define ("__mips_fpr=32"); \
335 builtin_define ("__mips16"); \
338 builtin_define ("__mips3d"); \
341 builtin_define ("__mips_dsp"); \
343 MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info); \
344 MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info); \
348 builtin_define ("__mips=1"); \
349 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS1"); \
351 else if (ISA_MIPS2) \
353 builtin_define ("__mips=2"); \
354 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS2"); \
356 else if (ISA_MIPS3) \
358 builtin_define ("__mips=3"); \
359 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS3"); \
361 else if (ISA_MIPS4) \
363 builtin_define ("__mips=4"); \
364 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS4"); \
366 else if (ISA_MIPS32) \
368 builtin_define ("__mips=32"); \
369 builtin_define ("__mips_isa_rev=1"); \
370 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
372 else if (ISA_MIPS32R2) \
374 builtin_define ("__mips=32"); \
375 builtin_define ("__mips_isa_rev=2"); \
376 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
378 else if (ISA_MIPS64) \
380 builtin_define ("__mips=64"); \
381 builtin_define ("__mips_isa_rev=1"); \
382 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
385 if (TARGET_HARD_FLOAT) \
386 builtin_define ("__mips_hard_float"); \
387 else if (TARGET_SOFT_FLOAT) \
388 builtin_define ("__mips_soft_float"); \
390 if (TARGET_SINGLE_FLOAT) \
391 builtin_define ("__mips_single_float"); \
393 if (TARGET_PAIRED_SINGLE_FLOAT) \
394 builtin_define ("__mips_paired_single_float"); \
396 if (TARGET_BIG_ENDIAN) \
398 builtin_define_std ("MIPSEB"); \
399 builtin_define ("_MIPSEB"); \
403 builtin_define_std ("MIPSEL"); \
404 builtin_define ("_MIPSEL"); \
407 /* Macros dependent on the C dialect. */ \
408 if (preprocessing_asm_p ()) \
410 builtin_define_std ("LANGUAGE_ASSEMBLY"); \
411 builtin_define ("_LANGUAGE_ASSEMBLY"); \
413 else if (c_dialect_cxx ()) \
415 builtin_define ("_LANGUAGE_C_PLUS_PLUS"); \
416 builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \
417 builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \
421 builtin_define_std ("LANGUAGE_C"); \
422 builtin_define ("_LANGUAGE_C"); \
424 if (c_dialect_objc ()) \
426 builtin_define ("_LANGUAGE_OBJECTIVE_C"); \
427 builtin_define ("__LANGUAGE_OBJECTIVE_C"); \
428 /* Bizarre, but needed at least for Irix. */ \
429 builtin_define_std ("LANGUAGE_C"); \
430 builtin_define ("_LANGUAGE_C"); \
433 if (mips_abi == ABI_EABI) \
434 builtin_define ("__mips_eabi"); \
438 /* Default target_flags if no switches are specified */
440 #ifndef TARGET_DEFAULT
441 #define TARGET_DEFAULT 0
444 #ifndef TARGET_CPU_DEFAULT
445 #define TARGET_CPU_DEFAULT 0
448 #ifndef TARGET_ENDIAN_DEFAULT
449 #define TARGET_ENDIAN_DEFAULT MASK_BIG_ENDIAN
452 #ifndef TARGET_FP_EXCEPTIONS_DEFAULT
453 #define TARGET_FP_EXCEPTIONS_DEFAULT MASK_FP_EXCEPTIONS
456 /* 'from-abi' makes a good default: you get whatever the ABI requires. */
457 #ifndef MIPS_ISA_DEFAULT
458 #ifndef MIPS_CPU_STRING_DEFAULT
459 #define MIPS_CPU_STRING_DEFAULT "from-abi"
465 /* Make this compile time constant for libgcc2 */
467 #define TARGET_64BIT 1
469 #define TARGET_64BIT 0
471 #endif /* IN_LIBGCC2 */
473 #define TARGET_LIBGCC_SDATA_SECTION ".sdata"
475 #ifndef MULTILIB_ENDIAN_DEFAULT
476 #if TARGET_ENDIAN_DEFAULT == 0
477 #define MULTILIB_ENDIAN_DEFAULT "EL"
479 #define MULTILIB_ENDIAN_DEFAULT "EB"
483 #ifndef MULTILIB_ISA_DEFAULT
484 # if MIPS_ISA_DEFAULT == 1
485 # define MULTILIB_ISA_DEFAULT "mips1"
487 # if MIPS_ISA_DEFAULT == 2
488 # define MULTILIB_ISA_DEFAULT "mips2"
490 # if MIPS_ISA_DEFAULT == 3
491 # define MULTILIB_ISA_DEFAULT "mips3"
493 # if MIPS_ISA_DEFAULT == 4
494 # define MULTILIB_ISA_DEFAULT "mips4"
496 # if MIPS_ISA_DEFAULT == 32
497 # define MULTILIB_ISA_DEFAULT "mips32"
499 # if MIPS_ISA_DEFAULT == 33
500 # define MULTILIB_ISA_DEFAULT "mips32r2"
502 # if MIPS_ISA_DEFAULT == 64
503 # define MULTILIB_ISA_DEFAULT "mips64"
505 # define MULTILIB_ISA_DEFAULT "mips1"
515 #ifndef MULTILIB_DEFAULTS
516 #define MULTILIB_DEFAULTS \
517 { MULTILIB_ENDIAN_DEFAULT, MULTILIB_ISA_DEFAULT, MULTILIB_ABI_DEFAULT }
520 /* We must pass -EL to the linker by default for little endian embedded
521 targets using linker scripts with a OUTPUT_FORMAT line. Otherwise, the
522 linker will default to using big-endian output files. The OUTPUT_FORMAT
523 line must be in the linker script, otherwise -EB/-EL will not work. */
526 #if TARGET_ENDIAN_DEFAULT == 0
527 #define ENDIAN_SPEC "%{!EB:%{!meb:-EL}} %{EB|meb:-EB}"
529 #define ENDIAN_SPEC "%{!EL:%{!mel:-EB}} %{EL|mel:-EL}"
533 /* Support for a compile-time default CPU, et cetera. The rules are:
534 --with-arch is ignored if -march is specified or a -mips is specified
535 (other than -mips16).
536 --with-tune is ignored if -mtune is specified.
537 --with-abi is ignored if -mabi is specified.
538 --with-float is ignored if -mhard-float or -msoft-float are
540 --with-divide is ignored if -mdivide-traps or -mdivide-breaks are
542 #define OPTION_DEFAULT_SPECS \
543 {"arch", "%{!march=*:%{mips16:-march=%(VALUE)}%{!mips*:-march=%(VALUE)}}" }, \
544 {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
545 {"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
546 {"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }, \
547 {"divide", "%{!mdivide-traps:%{!mdivide-breaks:-mdivide-%(VALUE)}}" }
550 #define GENERATE_DIVIDE_TRAPS (TARGET_DIVIDE_TRAPS \
551 && ISA_HAS_COND_TRAP)
553 #define GENERATE_BRANCHLIKELY (TARGET_BRANCHLIKELY \
557 /* True if the ABI can only work with 64-bit integer registers. We
558 generally allow ad-hoc variations for TARGET_SINGLE_FLOAT, but
559 otherwise floating-point registers must also be 64-bit. */
560 #define ABI_NEEDS_64BIT_REGS (TARGET_NEWABI || mips_abi == ABI_O64)
562 /* Likewise for 32-bit regs. */
563 #define ABI_NEEDS_32BIT_REGS (mips_abi == ABI_32)
565 /* True if symbols are 64 bits wide. At present, n64 is the only
566 ABI for which this is true. */
567 #define ABI_HAS_64BIT_SYMBOLS (mips_abi == ABI_64 && !TARGET_SYM32)
569 /* ISA has instructions for managing 64-bit fp and gp regs (e.g. mips3). */
570 #define ISA_HAS_64BIT_REGS (ISA_MIPS3 \
574 /* ISA has branch likely instructions (e.g. mips2). */
575 /* Disable branchlikely for tx39 until compare rewrite. They haven't
576 been generated up to this point. */
577 #define ISA_HAS_BRANCHLIKELY (!ISA_MIPS1)
579 /* ISA has a three-operand multiplication instruction (usually spelt "mul"). */
580 #define ISA_HAS_MUL3 ((TARGET_MIPS3900 \
591 /* ISA has the conditional move instructions introduced in mips4. */
592 #define ISA_HAS_CONDMOVE ((ISA_MIPS4 \
596 && !TARGET_MIPS5500 \
599 /* ISA has the mips4 FP condition code instructions: FP-compare to CC,
600 branch on CC, and move (both FP and non-FP) on CC. */
601 #define ISA_HAS_8CC (ISA_MIPS4 \
606 /* This is a catch all for other mips4 instructions: indexed load, the
607 FP madd and msub instructions, and the FP recip and recip sqrt
609 #define ISA_HAS_FP4 ((ISA_MIPS4 \
610 || (ISA_MIPS32R2 && TARGET_FLOAT64) \
614 /* ISA has conditional trap instructions. */
615 #define ISA_HAS_COND_TRAP (!ISA_MIPS1 \
618 /* ISA has integer multiply-accumulate instructions, madd and msub. */
619 #define ISA_HAS_MADD_MSUB ((ISA_MIPS32 \
624 /* ISA has floating-point nmadd and nmsub instructions. */
625 #define ISA_HAS_NMADD_NMSUB ((ISA_MIPS4 \
627 && (!TARGET_MIPS5400 || TARGET_MAD) \
630 /* ISA has count leading zeroes/ones instruction (not implemented). */
631 #define ISA_HAS_CLZ_CLO ((ISA_MIPS32 \
636 /* ISA has three operand multiply instructions that put
637 the high part in an accumulator: mulhi or mulhiu. */
638 #define ISA_HAS_MULHI ((TARGET_MIPS5400 \
643 /* ISA has three operand multiply instructions that
644 negates the result and puts the result in an accumulator. */
645 #define ISA_HAS_MULS ((TARGET_MIPS5400 \
650 /* ISA has three operand multiply instructions that subtracts the
651 result from a 4th operand and puts the result in an accumulator. */
652 #define ISA_HAS_MSAC ((TARGET_MIPS5400 \
657 /* ISA has three operand multiply instructions that the result
658 from a 4th operand and puts the result in an accumulator. */
659 #define ISA_HAS_MACC ((TARGET_MIPS4120 \
666 /* ISA has NEC VR-style MACC, MACCHI, DMACC and DMACCHI instructions. */
667 #define ISA_HAS_MACCHI ((TARGET_MIPS4120 \
668 || TARGET_MIPS4130) \
671 /* ISA has the "ror" (rotate right) instructions. */
672 #define ISA_HAS_ROR ((ISA_MIPS32R2 \
678 /* ISA has data prefetch instructions. This controls use of 'pref'. */
679 #define ISA_HAS_PREFETCH ((ISA_MIPS4 \
685 /* ISA has data indexed prefetch instructions. This controls use of
686 'prefx', along with TARGET_HARD_FLOAT and TARGET_DOUBLE_FLOAT.
687 (prefx is a cop1x instruction, so can only be used if FP is
689 #define ISA_HAS_PREFETCHX ((ISA_MIPS4 \
694 /* True if trunc.w.s and trunc.w.d are real (not synthetic)
695 instructions. Both require TARGET_HARD_FLOAT, and trunc.w.d
696 also requires TARGET_DOUBLE_FLOAT. */
697 #define ISA_HAS_TRUNC_W (!ISA_MIPS1)
699 /* ISA includes the MIPS32r2 seb and seh instructions. */
700 #define ISA_HAS_SEB_SEH (ISA_MIPS32R2 \
703 /* ISA includes the MIPS32/64 rev 2 ext and ins instructions. */
704 #define ISA_HAS_EXT_INS (ISA_MIPS32R2 \
707 /* ISA has instructions for accessing top part of 64-bit fp regs. */
708 #define ISA_HAS_MXHC1 (TARGET_FLOAT64 && ISA_MIPS32R2)
710 /* True if the result of a load is not available to the next instruction.
711 A nop will then be needed between instructions like "lw $4,..."
712 and "addiu $4,$4,1". */
713 #define ISA_HAS_LOAD_DELAY (ISA_MIPS1 \
714 && !TARGET_MIPS3900 \
717 /* Likewise mtc1 and mfc1. */
718 #define ISA_HAS_XFER_DELAY (mips_isa <= 3)
720 /* Likewise floating-point comparisons. */
721 #define ISA_HAS_FCMP_DELAY (mips_isa <= 3)
723 /* True if mflo and mfhi can be immediately followed by instructions
724 which write to the HI and LO registers.
726 According to MIPS specifications, MIPS ISAs I, II, and III need
727 (at least) two instructions between the reads of HI/LO and
728 instructions which write them, and later ISAs do not. Contradicting
729 the MIPS specifications, some MIPS IV processor user manuals (e.g.
730 the UM for the NEC Vr5000) document needing the instructions between
731 HI/LO reads and writes, as well. Therefore, we declare only MIPS32,
732 MIPS64 and later ISAs to have the interlocks, plus any specific
733 earlier-ISA CPUs for which CPU documentation declares that the
734 instructions are really interlocked. */
735 #define ISA_HAS_HILO_INTERLOCKS (ISA_MIPS32 \
740 /* Add -G xx support. */
742 #undef SWITCH_TAKES_ARG
743 #define SWITCH_TAKES_ARG(CHAR) \
744 (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')
746 #define OVERRIDE_OPTIONS override_options ()
748 #define CONDITIONAL_REGISTER_USAGE mips_conditional_register_usage ()
750 /* Show we can debug even without a frame pointer. */
751 #define CAN_DEBUG_WITHOUT_FP
753 /* Tell collect what flags to pass to nm. */
755 #define NM_FLAGS "-Bn"
759 #ifndef MIPS_ABI_DEFAULT
760 #define MIPS_ABI_DEFAULT ABI_32
763 /* Use the most portable ABI flag for the ASM specs. */
765 #if MIPS_ABI_DEFAULT == ABI_32
766 #define MULTILIB_ABI_DEFAULT "mabi=32"
769 #if MIPS_ABI_DEFAULT == ABI_O64
770 #define MULTILIB_ABI_DEFAULT "mabi=o64"
773 #if MIPS_ABI_DEFAULT == ABI_N32
774 #define MULTILIB_ABI_DEFAULT "mabi=n32"
777 #if MIPS_ABI_DEFAULT == ABI_64
778 #define MULTILIB_ABI_DEFAULT "mabi=64"
781 #if MIPS_ABI_DEFAULT == ABI_EABI
782 #define MULTILIB_ABI_DEFAULT "mabi=eabi"
785 /* SUBTARGET_ASM_OPTIMIZING_SPEC handles passing optimization options
786 to the assembler. It may be overridden by subtargets. */
787 #ifndef SUBTARGET_ASM_OPTIMIZING_SPEC
788 #define SUBTARGET_ASM_OPTIMIZING_SPEC "\
790 %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}}"
793 /* SUBTARGET_ASM_DEBUGGING_SPEC handles passing debugging options to
794 the assembler. It may be overridden by subtargets.
796 Beginning with gas 2.13, -mdebug must be passed to correctly handle
797 COFF debugging info. */
799 #ifndef SUBTARGET_ASM_DEBUGGING_SPEC
800 #define SUBTARGET_ASM_DEBUGGING_SPEC "\
801 %{g} %{g0} %{g1} %{g2} %{g3} \
802 %{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
803 %{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
804 %{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
805 %{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \
806 %{gcoff*:-mdebug} %{!gcoff*:-no-mdebug}"
809 /* SUBTARGET_ASM_SPEC is always passed to the assembler. It may be
810 overridden by subtargets. */
812 #ifndef SUBTARGET_ASM_SPEC
813 #define SUBTARGET_ASM_SPEC ""
818 %{G*} %(endian_spec) %{mips1} %{mips2} %{mips3} %{mips4} \
819 %{mips32} %{mips32r2} %{mips64} \
820 %{mips16:%{!mno-mips16:-mips16}} %{mno-mips16:-no-mips16} \
823 %{mfix-vr4120} %{mfix-vr4130} \
824 %(subtarget_asm_optimizing_spec) \
825 %(subtarget_asm_debugging_spec) \
826 %{mabi=*} %{!mabi*: %(asm_abi_default_spec)} \
827 %{mgp32} %{mgp64} %{march=*} %{mxgot:-xgot} \
829 %{mshared} %{mno-shared} \
830 %{msym32} %{mno-sym32} \
832 %(subtarget_asm_spec)"
834 /* Extra switches sometimes passed to the linker. */
835 /* ??? The bestGnum will never be passed to the linker, because the gcc driver
836 will interpret it as a -b option. */
841 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips32r2} %{mips64} \
842 %{bestGnum} %{shared} %{non_shared}"
843 #endif /* LINK_SPEC defined */
846 /* Specs for the compiler proper */
848 /* SUBTARGET_CC1_SPEC is passed to the compiler proper. It may be
849 overridden by subtargets. */
850 #ifndef SUBTARGET_CC1_SPEC
851 #define SUBTARGET_CC1_SPEC ""
854 /* CC1_SPEC is the set of arguments to pass to the compiler proper. */
858 %{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
859 %{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \
861 %(subtarget_cc1_spec)"
863 /* Preprocessor specs. */
865 /* SUBTARGET_CPP_SPEC is passed to the preprocessor. It may be
866 overridden by subtargets. */
867 #ifndef SUBTARGET_CPP_SPEC
868 #define SUBTARGET_CPP_SPEC ""
871 #define CPP_SPEC "%(subtarget_cpp_spec)"
873 /* This macro defines names of additional specifications to put in the specs
874 that can be used in various specifications like CC1_SPEC. Its definition
875 is an initializer with a subgrouping for each command option.
877 Each subgrouping contains a string constant, that defines the
878 specification name, and a string constant that used by the GCC driver
881 Do not define this macro if it does not need to do anything. */
883 #define EXTRA_SPECS \
884 { "subtarget_cc1_spec", SUBTARGET_CC1_SPEC }, \
885 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
886 { "subtarget_asm_optimizing_spec", SUBTARGET_ASM_OPTIMIZING_SPEC }, \
887 { "subtarget_asm_debugging_spec", SUBTARGET_ASM_DEBUGGING_SPEC }, \
888 { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \
889 { "asm_abi_default_spec", "-" MULTILIB_ABI_DEFAULT }, \
890 { "endian_spec", ENDIAN_SPEC }, \
891 SUBTARGET_EXTRA_SPECS
893 #ifndef SUBTARGET_EXTRA_SPECS
894 #define SUBTARGET_EXTRA_SPECS
897 #define DBX_DEBUGGING_INFO 1 /* generate stabs (OSF/rose) */
898 #define MIPS_DEBUGGING_INFO 1 /* MIPS specific debugging info */
899 #define DWARF2_DEBUGGING_INFO 1 /* dwarf2 debugging info */
901 #ifndef PREFERRED_DEBUGGING_TYPE
902 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
905 #define DWARF2_ADDR_SIZE (ABI_HAS_64BIT_SYMBOLS ? 8 : 4)
907 /* By default, turn on GDB extensions. */
908 #define DEFAULT_GDB_EXTENSIONS 1
910 /* Local compiler-generated symbols must have a prefix that the assembler
911 understands. By default, this is $, although some targets (e.g.,
912 NetBSD-ELF) need to override this. */
914 #ifndef LOCAL_LABEL_PREFIX
915 #define LOCAL_LABEL_PREFIX "$"
918 /* By default on the mips, external symbols do not have an underscore
919 prepended, but some targets (e.g., NetBSD) require this. */
921 #ifndef USER_LABEL_PREFIX
922 #define USER_LABEL_PREFIX ""
925 /* On Sun 4, this limit is 2048. We use 1500 to be safe,
926 since the length can run past this up to a continuation point. */
927 #undef DBX_CONTIN_LENGTH
928 #define DBX_CONTIN_LENGTH 1500
930 /* How to renumber registers for dbx and gdb. */
931 #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[ (REGNO) ]
933 /* The mapping from gcc register number to DWARF 2 CFA column number. */
934 #define DWARF_FRAME_REGNUM(REG) (REG)
936 /* The DWARF 2 CFA column which tracks the return address. */
937 #define DWARF_FRAME_RETURN_COLUMN (GP_REG_FIRST + 31)
939 /* The DWARF 2 CFA column which tracks the return address from a
940 signal handler context. */
941 #define SIGNAL_UNWIND_RETURN_COLUMN (FP_REG_LAST + 1)
943 /* Before the prologue, RA lives in r31. */
944 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, GP_REG_FIRST + 31)
946 /* Describe how we implement __builtin_eh_return. */
947 #define EH_RETURN_DATA_REGNO(N) \
948 ((N) < (TARGET_MIPS16 ? 2 : 4) ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
950 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_REG_FIRST + 3)
952 /* Offsets recorded in opcodes are a multiple of this alignment factor.
953 The default for this in 64-bit mode is 8, which causes problems with
954 SFmode register saves. */
955 #define DWARF_CIE_DATA_ALIGNMENT -4
957 /* Correct the offset of automatic variables and arguments. Note that
958 the MIPS debug format wants all automatic variables and arguments
959 to be in terms of the virtual frame pointer (stack pointer before
960 any adjustment in the function), while the MIPS 3.0 linker wants
961 the frame pointer to be the stack pointer after the initial
964 #define DEBUGGER_AUTO_OFFSET(X) \
965 mips_debugger_offset (X, (HOST_WIDE_INT) 0)
966 #define DEBUGGER_ARG_OFFSET(OFFSET, X) \
967 mips_debugger_offset (X, (HOST_WIDE_INT) OFFSET)
969 /* Target machine storage layout */
971 #define BITS_BIG_ENDIAN 0
972 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
973 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
975 /* Define this to set the endianness to use in libgcc2.c, which can
976 not depend on target_flags. */
977 #if !defined(MIPSEL) && !defined(__MIPSEL__)
978 #define LIBGCC2_WORDS_BIG_ENDIAN 1
980 #define LIBGCC2_WORDS_BIG_ENDIAN 0
983 #define MAX_BITS_PER_WORD 64
985 /* Width of a word, in units (bytes). */
986 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
988 #define MIN_UNITS_PER_WORD 4
991 /* For MIPS, width of a floating point register. */
992 #define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4)
994 /* If register $f0 holds a floating-point value, $f(0 + FP_INC) is
995 the next available register. */
996 #define FP_INC (TARGET_FLOAT64 || TARGET_SINGLE_FLOAT ? 1 : 2)
998 /* The largest size of value that can be held in floating-point
999 registers and moved with a single instruction. */
1000 #define UNITS_PER_HWFPVALUE (TARGET_SOFT_FLOAT ? 0 : FP_INC * UNITS_PER_FPREG)
1002 /* The largest size of value that can be held in floating-point
1004 #define UNITS_PER_FPVALUE \
1005 (TARGET_SOFT_FLOAT ? 0 \
1006 : TARGET_SINGLE_FLOAT ? UNITS_PER_FPREG \
1007 : LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)
1009 /* The number of bytes in a double. */
1010 #define UNITS_PER_DOUBLE (TYPE_PRECISION (double_type_node) / BITS_PER_UNIT)
1012 #define UNITS_PER_SIMD_WORD (TARGET_PAIRED_SINGLE_FLOAT ? 8 : UNITS_PER_WORD)
1014 /* Set the sizes of the core types. */
1015 #define SHORT_TYPE_SIZE 16
1016 #define INT_TYPE_SIZE 32
1017 #define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32)
1018 #define LONG_LONG_TYPE_SIZE 64
1020 #define FLOAT_TYPE_SIZE 32
1021 #define DOUBLE_TYPE_SIZE 64
1022 #define LONG_DOUBLE_TYPE_SIZE (TARGET_NEWABI ? 128 : 64)
1024 /* long double is not a fixed mode, but the idea is that, if we
1025 support long double, we also want a 128-bit integer type. */
1026 #define MAX_FIXED_MODE_SIZE LONG_DOUBLE_TYPE_SIZE
1029 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
1030 || (defined _ABI64 && _MIPS_SIM == _ABI64)
1031 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
1033 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
1037 /* Width in bits of a pointer. */
1038 #ifndef POINTER_SIZE
1039 #define POINTER_SIZE ((TARGET_LONG64 && TARGET_64BIT) ? 64 : 32)
1042 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
1043 #define PARM_BOUNDARY BITS_PER_WORD
1045 /* Allocation boundary (in *bits*) for the code of a function. */
1046 #define FUNCTION_BOUNDARY 32
1048 /* Alignment of field after `int : 0' in a structure. */
1049 #define EMPTY_FIELD_BOUNDARY 32
1051 /* Every structure's size must be a multiple of this. */
1052 /* 8 is observed right on a DECstation and on riscos 4.02. */
1053 #define STRUCTURE_SIZE_BOUNDARY 8
1055 /* There is no point aligning anything to a rounder boundary than this. */
1056 #define BIGGEST_ALIGNMENT LONG_DOUBLE_TYPE_SIZE
1058 /* All accesses must be aligned. */
1059 #define STRICT_ALIGNMENT 1
1061 /* Define this if you wish to imitate the way many other C compilers
1062 handle alignment of bitfields and the structures that contain
1065 The behavior is that the type written for a bit-field (`int',
1066 `short', or other integer type) imposes an alignment for the
1067 entire structure, as if the structure really did contain an
1068 ordinary field of that type. In addition, the bit-field is placed
1069 within the structure so that it would fit within such a field,
1070 not crossing a boundary for it.
1072 Thus, on most machines, a bit-field whose type is written as `int'
1073 would not cross a four-byte boundary, and would force four-byte
1074 alignment for the whole structure. (The alignment used may not
1075 be four bytes; it is controlled by the other alignment
1078 If the macro is defined, its definition should be a C expression;
1079 a nonzero value for the expression enables this behavior. */
1081 #define PCC_BITFIELD_TYPE_MATTERS 1
1083 /* If defined, a C expression to compute the alignment given to a
1084 constant that is being placed in memory. CONSTANT is the constant
1085 and ALIGN is the alignment that the object would ordinarily have.
1086 The value of this macro is used instead of that alignment to align
1089 If this macro is not defined, then ALIGN is used.
1091 The typical use of this macro is to increase alignment for string
1092 constants to be word aligned so that `strcpy' calls that copy
1093 constants can be done inline. */
1095 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
1096 ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
1097 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
1099 /* If defined, a C expression to compute the alignment for a static
1100 variable. TYPE is the data type, and ALIGN is the alignment that
1101 the object would ordinarily have. The value of this macro is used
1102 instead of that alignment to align the object.
1104 If this macro is not defined, then ALIGN is used.
1106 One use of this macro is to increase alignment of medium-size
1107 data to make it all fit in fewer cache lines. Another is to
1108 cause character arrays to be word-aligned so that `strcpy' calls
1109 that copy constants to character arrays can be done inline. */
1111 #undef DATA_ALIGNMENT
1112 #define DATA_ALIGNMENT(TYPE, ALIGN) \
1113 ((((ALIGN) < BITS_PER_WORD) \
1114 && (TREE_CODE (TYPE) == ARRAY_TYPE \
1115 || TREE_CODE (TYPE) == UNION_TYPE \
1116 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
1119 #define PAD_VARARGS_DOWN \
1120 (FUNCTION_ARG_PADDING (TYPE_MODE (type), type) == downward)
1122 /* Define if operations between registers always perform the operation
1123 on the full register even if a narrower mode is specified. */
1124 #define WORD_REGISTER_OPERATIONS
1126 /* When in 64-bit mode, move insns will sign extend SImode and CCmode
1127 moves. All other references are zero extended. */
1128 #define LOAD_EXTEND_OP(MODE) \
1129 (TARGET_64BIT && ((MODE) == SImode || (MODE) == CCmode) \
1130 ? SIGN_EXTEND : ZERO_EXTEND)
1132 /* Define this macro if it is advisable to hold scalars in registers
1133 in a wider mode than that declared by the program. In such cases,
1134 the value is constrained to be within the bounds of the declared
1135 type, but kept valid in the wider mode. The signedness of the
1136 extension may differ from that of the type. */
1138 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
1139 if (GET_MODE_CLASS (MODE) == MODE_INT \
1140 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
1142 if ((MODE) == SImode) \
1147 /* Define if loading short immediate values into registers sign extends. */
1148 #define SHORT_IMMEDIATES_SIGN_EXTEND
1150 /* The [d]clz instructions have the natural values at 0. */
1152 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
1153 ((VALUE) = GET_MODE_BITSIZE (MODE), true)
1155 /* Standard register usage. */
1157 /* Number of hardware registers. We have:
1159 - 32 integer registers
1160 - 32 floating point registers
1161 - 8 condition code registers
1162 - 2 accumulator registers (hi and lo)
1163 - 32 registers each for coprocessors 0, 2 and 3
1165 - ARG_POINTER_REGNUM
1166 - FRAME_POINTER_REGNUM
1167 - FAKE_CALL_REGNO (see the comment above load_callsi for details)
1168 - 3 dummy entries that were used at various times in the past.
1169 - 6 DSP accumulator registers (3 hi-lo pairs) for MIPS DSP ASE
1170 - 6 DSP control registers */
1172 #define FIRST_PSEUDO_REGISTER 188
1174 /* By default, fix the kernel registers ($26 and $27), the global
1175 pointer ($28) and the stack pointer ($29). This can change
1176 depending on the command-line options.
1178 Regarding coprocessor registers: without evidence to the contrary,
1179 it's best to assume that each coprocessor register has a unique
1180 use. This can be overridden, in, e.g., override_options() or
1181 CONDITIONAL_REGISTER_USAGE should the assumption be inappropriate
1182 for a particular target. */
1184 #define FIXED_REGISTERS \
1186 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1187 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, \
1188 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1189 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1190 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, \
1191 /* COP0 registers */ \
1192 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1193 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1194 /* COP2 registers */ \
1195 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1196 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1197 /* COP3 registers */ \
1198 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1199 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1200 /* 6 DSP accumulator registers & 6 control registers */ \
1201 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1 \
1205 /* Set up this array for o32 by default.
1207 Note that we don't mark $31 as a call-clobbered register. The idea is
1208 that it's really the call instructions themselves which clobber $31.
1209 We don't care what the called function does with it afterwards.
1211 This approach makes it easier to implement sibcalls. Unlike normal
1212 calls, sibcalls don't clobber $31, so the register reaches the
1213 called function in tact. EPILOGUE_USES says that $31 is useful
1214 to the called function. */
1216 #define CALL_USED_REGISTERS \
1218 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1219 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, \
1220 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1221 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1222 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1223 /* COP0 registers */ \
1224 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1225 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1226 /* COP2 registers */ \
1227 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1228 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1229 /* COP3 registers */ \
1230 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1231 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1232 /* 6 DSP accumulator registers & 6 control registers */ \
1233 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \
1237 /* Define this since $28, though fixed, is call-saved in many ABIs. */
1239 #define CALL_REALLY_USED_REGISTERS \
1240 { /* General registers. */ \
1241 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1242 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, \
1243 /* Floating-point registers. */ \
1244 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1245 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1247 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1248 /* COP0 registers */ \
1249 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1250 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1251 /* COP2 registers */ \
1252 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1253 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1254 /* COP3 registers */ \
1255 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1256 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1257 /* 6 DSP accumulator registers & 6 control registers */ \
1258 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 \
1261 /* Internal macros to classify a register number as to whether it's a
1262 general purpose register, a floating point register, a
1263 multiply/divide register, or a status register. */
1265 #define GP_REG_FIRST 0
1266 #define GP_REG_LAST 31
1267 #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
1268 #define GP_DBX_FIRST 0
1270 #define FP_REG_FIRST 32
1271 #define FP_REG_LAST 63
1272 #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
1273 #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32)
1275 #define MD_REG_FIRST 64
1276 #define MD_REG_LAST 65
1277 #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1)
1278 #define MD_DBX_FIRST (FP_DBX_FIRST + FP_REG_NUM)
1280 #define ST_REG_FIRST 67
1281 #define ST_REG_LAST 74
1282 #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1)
1285 /* FIXME: renumber. */
1286 #define COP0_REG_FIRST 80
1287 #define COP0_REG_LAST 111
1288 #define COP0_REG_NUM (COP0_REG_LAST - COP0_REG_FIRST + 1)
1290 #define COP2_REG_FIRST 112
1291 #define COP2_REG_LAST 143
1292 #define COP2_REG_NUM (COP2_REG_LAST - COP2_REG_FIRST + 1)
1294 #define COP3_REG_FIRST 144
1295 #define COP3_REG_LAST 175
1296 #define COP3_REG_NUM (COP3_REG_LAST - COP3_REG_FIRST + 1)
1297 /* ALL_COP_REG_NUM assumes that COP0,2,and 3 are numbered consecutively. */
1298 #define ALL_COP_REG_NUM (COP3_REG_LAST - COP0_REG_FIRST + 1)
1300 #define DSP_ACC_REG_FIRST 176
1301 #define DSP_ACC_REG_LAST 181
1302 #define DSP_ACC_REG_NUM (DSP_ACC_REG_LAST - DSP_ACC_REG_FIRST + 1)
1304 #define AT_REGNUM (GP_REG_FIRST + 1)
1305 #define HI_REGNUM (MD_REG_FIRST + 0)
1306 #define LO_REGNUM (MD_REG_FIRST + 1)
1307 #define AC1HI_REGNUM (DSP_ACC_REG_FIRST + 0)
1308 #define AC1LO_REGNUM (DSP_ACC_REG_FIRST + 1)
1309 #define AC2HI_REGNUM (DSP_ACC_REG_FIRST + 2)
1310 #define AC2LO_REGNUM (DSP_ACC_REG_FIRST + 3)
1311 #define AC3HI_REGNUM (DSP_ACC_REG_FIRST + 4)
1312 #define AC3LO_REGNUM (DSP_ACC_REG_FIRST + 5)
1314 /* FPSW_REGNUM is the single condition code used if !ISA_HAS_8CC.
1315 If ISA_HAS_8CC, it should not be used, and an arbitrary ST_REG
1316 should be used instead. */
1317 #define FPSW_REGNUM ST_REG_FIRST
1319 #define GP_REG_P(REGNO) \
1320 ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
1321 #define M16_REG_P(REGNO) \
1322 (((REGNO) >= 2 && (REGNO) <= 7) || (REGNO) == 16 || (REGNO) == 17)
1323 #define FP_REG_P(REGNO) \
1324 ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
1325 #define MD_REG_P(REGNO) \
1326 ((unsigned int) ((int) (REGNO) - MD_REG_FIRST) < MD_REG_NUM)
1327 #define ST_REG_P(REGNO) \
1328 ((unsigned int) ((int) (REGNO) - ST_REG_FIRST) < ST_REG_NUM)
1329 #define COP0_REG_P(REGNO) \
1330 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < COP0_REG_NUM)
1331 #define COP2_REG_P(REGNO) \
1332 ((unsigned int) ((int) (REGNO) - COP2_REG_FIRST) < COP2_REG_NUM)
1333 #define COP3_REG_P(REGNO) \
1334 ((unsigned int) ((int) (REGNO) - COP3_REG_FIRST) < COP3_REG_NUM)
1335 #define ALL_COP_REG_P(REGNO) \
1336 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < ALL_COP_REG_NUM)
1337 /* Test if REGNO is one of the 6 new DSP accumulators. */
1338 #define DSP_ACC_REG_P(REGNO) \
1339 ((unsigned int) ((int) (REGNO) - DSP_ACC_REG_FIRST) < DSP_ACC_REG_NUM)
1340 /* Test if REGNO is hi, lo, or one of the 6 new DSP accumulators. */
1341 #define ACC_REG_P(REGNO) \
1342 (MD_REG_P (REGNO) || DSP_ACC_REG_P (REGNO))
1343 /* Test if REGNO is HI or the first register of 3 new DSP accumulator pairs. */
1344 #define ACC_HI_REG_P(REGNO) \
1345 ((REGNO) == HI_REGNUM || (REGNO) == AC1HI_REGNUM || (REGNO) == AC2HI_REGNUM \
1346 || (REGNO) == AC3HI_REGNUM)
1348 #define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X)))
1350 /* True if X is (const (unspec [(const_int 0)] UNSPEC_GP)). This is used
1351 to initialize the mips16 gp pseudo register. */
1352 #define CONST_GP_P(X) \
1353 (GET_CODE (X) == CONST \
1354 && GET_CODE (XEXP (X, 0)) == UNSPEC \
1355 && XINT (XEXP (X, 0), 1) == UNSPEC_GP)
1357 /* Return coprocessor number from register number. */
1359 #define COPNUM_AS_CHAR_FROM_REGNUM(REGNO) \
1360 (COP0_REG_P (REGNO) ? '0' : COP2_REG_P (REGNO) ? '2' \
1361 : COP3_REG_P (REGNO) ? '3' : '?')
1364 #define HARD_REGNO_NREGS(REGNO, MODE) mips_hard_regno_nregs (REGNO, MODE)
1366 /* To make the code simpler, HARD_REGNO_MODE_OK just references an
1367 array built in override_options. Because machmodes.h is not yet
1368 included before this file is processed, the MODE bound can't be
1371 extern char mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
1373 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1374 mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ]
1376 /* Value is 1 if it is a good idea to tie two pseudo registers
1377 when one has mode MODE1 and one has mode MODE2.
1378 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
1379 for any hard reg, then this must be 0 for correct output. */
1380 #define MODES_TIEABLE_P(MODE1, MODE2) \
1381 ((GET_MODE_CLASS (MODE1) == MODE_FLOAT || \
1382 GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT) \
1383 == (GET_MODE_CLASS (MODE2) == MODE_FLOAT || \
1384 GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT))
1386 /* Register to use for pushing function arguments. */
1387 #define STACK_POINTER_REGNUM (GP_REG_FIRST + 29)
1389 /* These two registers don't really exist: they get eliminated to either
1390 the stack or hard frame pointer. */
1391 #define ARG_POINTER_REGNUM 77
1392 #define FRAME_POINTER_REGNUM 78
1394 /* $30 is not available on the mips16, so we use $17 as the frame
1396 #define HARD_FRAME_POINTER_REGNUM \
1397 (TARGET_MIPS16 ? GP_REG_FIRST + 17 : GP_REG_FIRST + 30)
1399 /* Value should be nonzero if functions must have frame pointers.
1400 Zero means the frame pointer need not be set up (and parms
1401 may be accessed via the stack pointer) in functions that seem suitable.
1402 This is computed in `reload', in reload1.c. */
1403 #define FRAME_POINTER_REQUIRED (current_function_calls_alloca)
1405 /* Register in which static-chain is passed to a function. */
1406 #define STATIC_CHAIN_REGNUM (GP_REG_FIRST + 2)
1408 /* Registers used as temporaries in prologue/epilogue code. If we're
1409 generating mips16 code, these registers must come from the core set
1410 of 8. The prologue register mustn't conflict with any incoming
1411 arguments, the static chain pointer, or the frame pointer. The
1412 epilogue temporary mustn't conflict with the return registers, the
1413 frame pointer, the EH stack adjustment, or the EH data registers. */
1415 #define MIPS_PROLOGUE_TEMP_REGNUM (GP_REG_FIRST + 3)
1416 #define MIPS_EPILOGUE_TEMP_REGNUM (GP_REG_FIRST + (TARGET_MIPS16 ? 6 : 8))
1418 #define MIPS_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_PROLOGUE_TEMP_REGNUM)
1419 #define MIPS_EPILOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_EPILOGUE_TEMP_REGNUM)
1421 /* Define this macro if it is as good or better to call a constant
1422 function address than to call an address kept in a register. */
1423 #define NO_FUNCTION_CSE 1
1425 /* The ABI-defined global pointer. Sometimes we use a different
1426 register in leaf functions: see PIC_OFFSET_TABLE_REGNUM. */
1427 #define GLOBAL_POINTER_REGNUM (GP_REG_FIRST + 28)
1429 /* We normally use $28 as the global pointer. However, when generating
1430 n32/64 PIC, it is better for leaf functions to use a call-clobbered
1431 register instead. They can then avoid saving and restoring $28
1432 and perhaps avoid using a frame at all.
1434 When a leaf function uses something other than $28, mips_expand_prologue
1435 will modify pic_offset_table_rtx in place. Take the register number
1436 from there after reload. */
1437 #define PIC_OFFSET_TABLE_REGNUM \
1438 (reload_completed ? REGNO (pic_offset_table_rtx) : GLOBAL_POINTER_REGNUM)
1440 #define PIC_FUNCTION_ADDR_REGNUM (GP_REG_FIRST + 25)
1442 /* Define the classes of registers for register constraints in the
1443 machine description. Also define ranges of constants.
1445 One of the classes must always be named ALL_REGS and include all hard regs.
1446 If there is more than one class, another class must be named NO_REGS
1447 and contain no registers.
1449 The name GENERAL_REGS must be the name of a class (or an alias for
1450 another name such as ALL_REGS). This is the class of registers
1451 that is allowed by "g" or "r" in a register constraint.
1452 Also, registers outside this class are allocated only when
1453 instructions express preferences for them.
1455 The classes must be numbered in nondecreasing order; that is,
1456 a larger-numbered class must never be contained completely
1457 in a smaller-numbered class.
1459 For any two classes, it is very desirable that there be another
1460 class that represents their union. */
1464 NO_REGS, /* no registers in set */
1465 M16_NA_REGS, /* mips16 regs not used to pass args */
1466 M16_REGS, /* mips16 directly accessible registers */
1467 T_REG, /* mips16 T register ($24) */
1468 M16_T_REGS, /* mips16 registers plus T register */
1469 PIC_FN_ADDR_REG, /* SVR4 PIC function address register */
1470 V1_REG, /* Register $v1 ($3) used for TLS access. */
1471 LEA_REGS, /* Every GPR except $25 */
1472 GR_REGS, /* integer registers */
1473 FP_REGS, /* floating point registers */
1474 HI_REG, /* hi register */
1475 LO_REG, /* lo register */
1476 MD_REGS, /* multiply/divide registers (hi/lo) */
1477 COP0_REGS, /* generic coprocessor classes */
1480 HI_AND_GR_REGS, /* union classes */
1487 ALL_COP_AND_GR_REGS,
1488 ST_REGS, /* status registers (fp status) */
1489 DSP_ACC_REGS, /* DSP accumulator registers */
1490 ACC_REGS, /* Hi/Lo and DSP accumulator registers */
1491 ALL_REGS, /* all registers */
1492 LIM_REG_CLASSES /* max value + 1 */
1495 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1497 #define GENERAL_REGS GR_REGS
1499 /* An initializer containing the names of the register classes as C
1500 string constants. These names are used in writing some of the
1503 #define REG_CLASS_NAMES \
1510 "PIC_FN_ADDR_REG", \
1518 /* coprocessor registers */ \
1525 "COP0_AND_GR_REGS", \
1526 "COP2_AND_GR_REGS", \
1527 "COP3_AND_GR_REGS", \
1529 "ALL_COP_AND_GR_REGS", \
1536 /* An initializer containing the contents of the register classes,
1537 as integers which are bit masks. The Nth integer specifies the
1538 contents of class N. The way the integer MASK is interpreted is
1539 that register R is in the class if `MASK & (1 << R)' is 1.
1541 When the machine has more than 32 registers, an integer does not
1542 suffice. Then the integers are replaced by sub-initializers,
1543 braced groupings containing several integers. Each
1544 sub-initializer must be suitable as an initializer for the type
1545 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
1547 #define REG_CLASS_CONTENTS \
1549 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* no registers */ \
1550 { 0x0003000c, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 nonarg regs */\
1551 { 0x000300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 registers */ \
1552 { 0x01000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 T register */ \
1553 { 0x010300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 and T regs */ \
1554 { 0x02000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* SVR4 PIC function address register */ \
1555 { 0x00000008, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* only $v1 */ \
1556 { 0xfdffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* Every other GPR except $25 */ \
1557 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* integer registers */ \
1558 { 0x00000000, 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* floating registers*/ \
1559 { 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* hi register */ \
1560 { 0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* lo register */ \
1561 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* mul/div registers */ \
1562 { 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, /* cop0 registers */ \
1563 { 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, /* cop2 registers */ \
1564 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, /* cop3 registers */ \
1565 { 0xffffffff, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* union classes */ \
1566 { 0xffffffff, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, \
1567 { 0x00000000, 0xffffffff, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, \
1568 { 0xffffffff, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, \
1569 { 0xffffffff, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, \
1570 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, \
1571 { 0x00000000, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
1572 { 0xffffffff, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
1573 { 0x00000000, 0x00000000, 0x000007f8, 0x00000000, 0x00000000, 0x00000000 }, /* status registers */ \
1574 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x003f0000 }, /* dsp accumulator registers */ \
1575 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x003f0000 }, /* hi/lo and dsp accumulator registers */ \
1576 { 0xffffffff, 0xffffffff, 0xffff07ff, 0xffffffff, 0xffffffff, 0x0fffffff } /* all registers */ \
1580 /* A C expression whose value is a register class containing hard
1581 register REGNO. In general there is more that one such class;
1582 choose a class which is "minimal", meaning that no smaller class
1583 also contains the register. */
1585 extern const enum reg_class mips_regno_to_class[];
1587 #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ]
1589 /* A macro whose definition is the name of the class to which a
1590 valid base register must belong. A base register is one used in
1591 an address which is the register value plus a displacement. */
1593 #define BASE_REG_CLASS (TARGET_MIPS16 ? M16_REGS : GR_REGS)
1595 /* A macro whose definition is the name of the class to which a
1596 valid index register must belong. An index register is one used
1597 in an address where its value is either multiplied by a scale
1598 factor or added to another register (as well as added to a
1601 #define INDEX_REG_CLASS NO_REGS
1603 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
1604 registers explicitly used in the rtl to be used as spill registers
1605 but prevents the compiler from extending the lifetime of these
1608 #define SMALL_REGISTER_CLASSES (TARGET_MIPS16)
1610 /* This macro is used later on in the file. */
1611 #define GR_REG_CLASS_P(CLASS) \
1612 ((CLASS) == GR_REGS || (CLASS) == M16_REGS || (CLASS) == T_REG \
1613 || (CLASS) == M16_T_REGS || (CLASS) == M16_NA_REGS \
1614 || (CLASS) == V1_REG \
1615 || (CLASS) == PIC_FN_ADDR_REG || (CLASS) == LEA_REGS)
1617 /* This macro is also used later on in the file. */
1618 #define COP_REG_CLASS_P(CLASS) \
1619 ((CLASS) == COP0_REGS || (CLASS) == COP2_REGS || (CLASS) == COP3_REGS)
1621 /* REG_ALLOC_ORDER is to order in which to allocate registers. This
1622 is the default value (allocate the registers in numeric order). We
1623 define it just so that we can override it for the mips16 target in
1624 ORDER_REGS_FOR_LOCAL_ALLOC. */
1626 #define REG_ALLOC_ORDER \
1627 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \
1628 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, \
1629 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \
1630 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \
1631 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
1632 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \
1633 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \
1634 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, \
1635 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, \
1636 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, \
1637 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, \
1638 176,177,178,179,180,181,182,183,184,185,186,187 \
1641 /* ORDER_REGS_FOR_LOCAL_ALLOC is a macro which permits reg_alloc_order
1642 to be rearranged based on a particular function. On the mips16, we
1643 want to allocate $24 (T_REG) before other registers for
1644 instructions for which it is possible. */
1646 #define ORDER_REGS_FOR_LOCAL_ALLOC mips_order_regs_for_local_alloc ()
1648 /* True if VALUE is an unsigned 6-bit number. */
1650 #define UIMM6_OPERAND(VALUE) \
1651 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0x3f) == 0)
1653 /* True if VALUE is a signed 10-bit number. */
1655 #define IMM10_OPERAND(VALUE) \
1656 ((unsigned HOST_WIDE_INT) (VALUE) + 0x200 < 0x400)
1658 /* True if VALUE is a signed 16-bit number. */
1660 #define SMALL_OPERAND(VALUE) \
1661 ((unsigned HOST_WIDE_INT) (VALUE) + 0x8000 < 0x10000)
1663 /* True if VALUE is an unsigned 16-bit number. */
1665 #define SMALL_OPERAND_UNSIGNED(VALUE) \
1666 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0xffff) == 0)
1668 /* True if VALUE can be loaded into a register using LUI. */
1670 #define LUI_OPERAND(VALUE) \
1671 (((VALUE) | 0x7fff0000) == 0x7fff0000 \
1672 || ((VALUE) | 0x7fff0000) + 0x10000 == 0)
1674 /* Return a value X with the low 16 bits clear, and such that
1675 VALUE - X is a signed 16-bit value. */
1677 #define CONST_HIGH_PART(VALUE) \
1678 (((VALUE) + 0x8000) & ~(unsigned HOST_WIDE_INT) 0xffff)
1680 #define CONST_LOW_PART(VALUE) \
1681 ((VALUE) - CONST_HIGH_PART (VALUE))
1683 #define SMALL_INT(X) SMALL_OPERAND (INTVAL (X))
1684 #define SMALL_INT_UNSIGNED(X) SMALL_OPERAND_UNSIGNED (INTVAL (X))
1685 #define LUI_INT(X) LUI_OPERAND (INTVAL (X))
1687 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
1688 mips_preferred_reload_class (X, CLASS)
1690 /* Certain machines have the property that some registers cannot be
1691 copied to some other registers without using memory. Define this
1692 macro on those machines to be a C expression that is nonzero if
1693 objects of mode MODE in registers of CLASS1 can only be copied to
1694 registers of class CLASS2 by storing a register of CLASS1 into
1695 memory and loading that memory location into a register of CLASS2.
1697 Do not define this macro if its value would always be zero. */
1699 #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \
1700 ((!TARGET_DEBUG_H_MODE \
1701 && GET_MODE_CLASS (MODE) == MODE_INT \
1702 && ((CLASS1 == FP_REGS && GR_REG_CLASS_P (CLASS2)) \
1703 || (GR_REG_CLASS_P (CLASS1) && CLASS2 == FP_REGS))) \
1704 || (TARGET_FLOAT64 && !TARGET_64BIT && (MODE) == DFmode \
1705 && ((GR_REG_CLASS_P (CLASS1) && CLASS2 == FP_REGS) \
1706 || (GR_REG_CLASS_P (CLASS2) && CLASS1 == FP_REGS))))
1708 /* The HI and LO registers can only be reloaded via the general
1709 registers. Condition code registers can only be loaded to the
1710 general registers, and from the floating point registers. */
1712 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1713 mips_secondary_reload_class (CLASS, MODE, X, 1)
1714 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1715 mips_secondary_reload_class (CLASS, MODE, X, 0)
1717 /* Return the maximum number of consecutive registers
1718 needed to represent mode MODE in a register of class CLASS. */
1720 #define CLASS_MAX_NREGS(CLASS, MODE) mips_class_max_nregs (CLASS, MODE)
1722 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1723 mips_cannot_change_mode_class (FROM, TO, CLASS)
1725 /* Stack layout; function entry, exit and calling. */
1727 #define STACK_GROWS_DOWNWARD
1729 /* The offset of the first local variable from the beginning of the frame.
1730 See compute_frame_size for details about the frame layout.
1732 ??? If flag_profile_values is true, and we are generating 32-bit code, then
1733 we assume that we will need 16 bytes of argument space. This is because
1734 the value profiling code may emit calls to cmpdi2 in leaf functions.
1735 Without this hack, the local variables will start at sp+8 and the gp save
1736 area will be at sp+16, and thus they will overlap. compute_frame_size is
1737 OK because it uses STARTING_FRAME_OFFSET to compute cprestore_size, which
1738 will end up as 24 instead of 8. This won't be needed if profiling code is
1739 inserted before virtual register instantiation. */
1741 #define STARTING_FRAME_OFFSET \
1742 ((flag_profile_values && ! TARGET_64BIT \
1743 ? MAX (REG_PARM_STACK_SPACE(NULL), current_function_outgoing_args_size) \
1744 : current_function_outgoing_args_size) \
1745 + (TARGET_ABICALLS && !TARGET_NEWABI \
1746 ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
1748 #define RETURN_ADDR_RTX mips_return_addr
1750 /* Since the mips16 ISA mode is encoded in the least-significant bit
1751 of the address, mask it off return addresses for purposes of
1752 finding exception handling regions. */
1754 #define MASK_RETURN_ADDR GEN_INT (-2)
1757 /* Similarly, don't use the least-significant bit to tell pointers to
1758 code from vtable index. */
1760 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
1762 /* The eliminations to $17 are only used for mips16 code. See the
1763 definition of HARD_FRAME_POINTER_REGNUM. */
1765 #define ELIMINABLE_REGS \
1766 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1767 { ARG_POINTER_REGNUM, GP_REG_FIRST + 30}, \
1768 { ARG_POINTER_REGNUM, GP_REG_FIRST + 17}, \
1769 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1770 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 30}, \
1771 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 17}}
1773 /* We can always eliminate to the hard frame pointer. We can eliminate
1774 to the stack pointer unless a frame pointer is needed.
1776 In mips16 mode, we need a frame pointer for a large frame; otherwise,
1777 reload may be unable to compute the address of a local variable,
1778 since there is no way to add a large constant to the stack pointer
1779 without using a temporary register. */
1780 #define CAN_ELIMINATE(FROM, TO) \
1781 ((TO) == HARD_FRAME_POINTER_REGNUM \
1782 || ((TO) == STACK_POINTER_REGNUM && !frame_pointer_needed \
1783 && (!TARGET_MIPS16 \
1784 || compute_frame_size (get_frame_size ()) < 32768)))
1786 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1787 (OFFSET) = mips_initial_elimination_offset ((FROM), (TO))
1789 /* Allocate stack space for arguments at the beginning of each function. */
1790 #define ACCUMULATE_OUTGOING_ARGS 1
1792 /* The argument pointer always points to the first argument. */
1793 #define FIRST_PARM_OFFSET(FNDECL) 0
1795 /* o32 and o64 reserve stack space for all argument registers. */
1796 #define REG_PARM_STACK_SPACE(FNDECL) \
1798 ? (MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD) \
1801 /* Define this if it is the responsibility of the caller to
1802 allocate the area reserved for arguments passed in registers.
1803 If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
1804 of this macro is to determine whether the space is included in
1805 `current_function_outgoing_args_size'. */
1806 #define OUTGOING_REG_PARM_STACK_SPACE
1808 #define STACK_BOUNDARY (TARGET_NEWABI ? 128 : 64)
1810 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
1812 /* Symbolic macros for the registers used to return integer and floating
1815 #define GP_RETURN (GP_REG_FIRST + 2)
1816 #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0))
1818 #define MAX_ARGS_IN_REGISTERS (TARGET_OLDABI ? 4 : 8)
1820 /* Symbolic macros for the first/last argument registers. */
1822 #define GP_ARG_FIRST (GP_REG_FIRST + 4)
1823 #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
1824 #define FP_ARG_FIRST (FP_REG_FIRST + 12)
1825 #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
1827 #define LIBCALL_VALUE(MODE) \
1828 mips_function_value (NULL_TREE, NULL, (MODE))
1830 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1831 mips_function_value ((VALTYPE), (FUNC), VOIDmode)
1833 /* 1 if N is a possible register number for a function value.
1834 On the MIPS, R2 R3 and F0 F2 are the only register thus used.
1835 Currently, R2 and F0 are only implemented here (C has no complex type) */
1837 #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN \
1838 || (LONG_DOUBLE_TYPE_SIZE == 128 && FP_RETURN != GP_RETURN \
1839 && (N) == FP_RETURN + 2))
1841 /* 1 if N is a possible register number for function argument passing.
1842 We have no FP argument registers when soft-float. When FP registers
1843 are 32 bits, we can't directly reference the odd numbered ones. */
1845 #define FUNCTION_ARG_REGNO_P(N) \
1846 ((IN_RANGE((N), GP_ARG_FIRST, GP_ARG_LAST) \
1847 || (IN_RANGE((N), FP_ARG_FIRST, FP_ARG_LAST))) \
1850 /* This structure has to cope with two different argument allocation
1851 schemes. Most MIPS ABIs view the arguments as a structure, of which
1852 the first N words go in registers and the rest go on the stack. If I
1853 < N, the Ith word might go in Ith integer argument register or in a
1854 floating-point register. For these ABIs, we only need to remember
1855 the offset of the current argument into the structure.
1857 The EABI instead allocates the integer and floating-point arguments
1858 separately. The first N words of FP arguments go in FP registers,
1859 the rest go on the stack. Likewise, the first N words of the other
1860 arguments go in integer registers, and the rest go on the stack. We
1861 need to maintain three counts: the number of integer registers used,
1862 the number of floating-point registers used, and the number of words
1863 passed on the stack.
1865 We could keep separate information for the two ABIs (a word count for
1866 the standard ABIs, and three separate counts for the EABI). But it
1867 seems simpler to view the standard ABIs as forms of EABI that do not
1868 allocate floating-point registers.
1870 So for the standard ABIs, the first N words are allocated to integer
1871 registers, and function_arg decides on an argument-by-argument basis
1872 whether that argument should really go in an integer register, or in
1873 a floating-point one. */
1875 typedef struct mips_args {
1876 /* Always true for varargs functions. Otherwise true if at least
1877 one argument has been passed in an integer register. */
1880 /* The number of arguments seen so far. */
1881 unsigned int arg_number;
1883 /* The number of integer registers used so far. For all ABIs except
1884 EABI, this is the number of words that have been added to the
1885 argument structure, limited to MAX_ARGS_IN_REGISTERS. */
1886 unsigned int num_gprs;
1888 /* For EABI, the number of floating-point registers used so far. */
1889 unsigned int num_fprs;
1891 /* The number of words passed on the stack. */
1892 unsigned int stack_words;
1894 /* On the mips16, we need to keep track of which floating point
1895 arguments were passed in general registers, but would have been
1896 passed in the FP regs if this were a 32-bit function, so that we
1897 can move them to the FP regs if we wind up calling a 32-bit
1898 function. We record this information in fp_code, encoded in base
1899 four. A zero digit means no floating point argument, a one digit
1900 means an SFmode argument, and a two digit means a DFmode argument,
1901 and a three digit is not used. The low order digit is the first
1902 argument. Thus 6 == 1 * 4 + 2 means a DFmode argument followed by
1903 an SFmode argument. ??? A more sophisticated approach will be
1904 needed if MIPS_ABI != ABI_32. */
1907 /* True if the function has a prototype. */
1911 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1912 for a call to a function whose data type is FNTYPE.
1913 For a library call, FNTYPE is 0. */
1915 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
1916 init_cumulative_args (&CUM, FNTYPE, LIBNAME) \
1918 /* Update the data in CUM to advance over an argument
1919 of mode MODE and data type TYPE.
1920 (TYPE is null for libcalls where that information may not be available.) */
1922 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1923 function_arg_advance (&CUM, MODE, TYPE, NAMED)
1925 /* Determine where to put an argument to a function.
1926 Value is zero to push the argument on the stack,
1927 or a hard register in which to store the argument.
1929 MODE is the argument's machine mode.
1930 TYPE is the data type of the argument (as a tree).
1931 This is null for libcalls where that information may
1933 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1934 the preceding args and about the function being called.
1935 NAMED is nonzero if this argument is a named parameter
1936 (otherwise it is an extra parameter matching an ellipsis). */
1938 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1939 function_arg( &CUM, MODE, TYPE, NAMED)
1941 #define FUNCTION_ARG_BOUNDARY function_arg_boundary
1943 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
1944 (mips_pad_arg_upward (MODE, TYPE) ? upward : downward)
1946 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
1947 (mips_pad_reg_upward (MODE, TYPE) ? upward : downward)
1949 /* True if using EABI and varargs can be passed in floating-point
1950 registers. Under these conditions, we need a more complex form
1951 of va_list, which tracks GPR, FPR and stack arguments separately. */
1952 #define EABI_FLOAT_VARARGS_P \
1953 (mips_abi == ABI_EABI && UNITS_PER_FPVALUE >= UNITS_PER_DOUBLE)
1956 /* Say that the epilogue uses the return address register. Note that
1957 in the case of sibcalls, the values "used by the epilogue" are
1958 considered live at the start of the called function. */
1959 #define EPILOGUE_USES(REGNO) ((REGNO) == 31)
1961 /* Treat LOC as a byte offset from the stack pointer and round it up
1962 to the next fully-aligned offset. */
1963 #define MIPS_STACK_ALIGN(LOC) \
1964 (TARGET_NEWABI ? ((LOC) + 15) & -16 : ((LOC) + 7) & -8)
1967 /* Implement `va_start' for varargs and stdarg. */
1968 #define EXPAND_BUILTIN_VA_START(valist, nextarg) \
1969 mips_va_start (valist, nextarg)
1971 /* Output assembler code to FILE to increment profiler label # LABELNO
1972 for profiling a function entry. */
1974 #define FUNCTION_PROFILER(FILE, LABELNO) \
1976 if (TARGET_MIPS16) \
1977 sorry ("mips16 function profiling"); \
1978 fprintf (FILE, "\t.set\tnoat\n"); \
1979 fprintf (FILE, "\tmove\t%s,%s\t\t# save current return address\n", \
1980 reg_names[GP_REG_FIRST + 1], reg_names[GP_REG_FIRST + 31]); \
1981 if (!TARGET_NEWABI) \
1984 "\t%s\t%s,%s,%d\t\t# _mcount pops 2 words from stack\n", \
1985 TARGET_64BIT ? "dsubu" : "subu", \
1986 reg_names[STACK_POINTER_REGNUM], \
1987 reg_names[STACK_POINTER_REGNUM], \
1988 Pmode == DImode ? 16 : 8); \
1990 fprintf (FILE, "\tjal\t_mcount\n"); \
1991 fprintf (FILE, "\t.set\tat\n"); \
1994 /* No mips port has ever used the profiler counter word, so don't emit it
1995 or the label for it. */
1997 #define NO_PROFILE_COUNTERS 1
1999 /* Define this macro if the code for function profiling should come
2000 before the function prologue. Normally, the profiling code comes
2003 /* #define PROFILE_BEFORE_PROLOGUE */
2005 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
2006 the stack pointer does not matter. The value is tested only in
2007 functions that have frame pointers.
2008 No definition is equivalent to always zero. */
2010 #define EXIT_IGNORE_STACK 1
2013 /* A C statement to output, on the stream FILE, assembler code for a
2014 block of data that contains the constant parts of a trampoline.
2015 This code should not include a label--the label is taken care of
2018 #define TRAMPOLINE_TEMPLATE(STREAM) \
2020 if (ptr_mode == DImode) \
2021 fprintf (STREAM, "\t.word\t0x03e0082d\t\t# dmove $1,$31\n"); \
2023 fprintf (STREAM, "\t.word\t0x03e00821\t\t# move $1,$31\n"); \
2024 fprintf (STREAM, "\t.word\t0x04110001\t\t# bgezal $0,.+8\n"); \
2025 fprintf (STREAM, "\t.word\t0x00000000\t\t# nop\n"); \
2026 if (ptr_mode == DImode) \
2028 fprintf (STREAM, "\t.word\t0xdfe30014\t\t# ld $3,20($31)\n"); \
2029 fprintf (STREAM, "\t.word\t0xdfe2001c\t\t# ld $2,28($31)\n"); \
2030 fprintf (STREAM, "\t.word\t0x0060c82d\t\t# dmove $25,$3\n"); \
2034 fprintf (STREAM, "\t.word\t0x8fe30014\t\t# lw $3,20($31)\n"); \
2035 fprintf (STREAM, "\t.word\t0x8fe20018\t\t# lw $2,24($31)\n"); \
2036 fprintf (STREAM, "\t.word\t0x0060c821\t\t# move $25,$3\n"); \
2038 fprintf (STREAM, "\t.word\t0x00600008\t\t# jr $3\n"); \
2039 if (ptr_mode == DImode) \
2041 fprintf (STREAM, "\t.word\t0x0020f82d\t\t# dmove $31,$1\n"); \
2042 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <function address>\n"); \
2043 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <static chain value>\n"); \
2047 fprintf (STREAM, "\t.word\t0x0020f821\t\t# move $31,$1\n"); \
2048 fprintf (STREAM, "\t.word\t0x00000000\t\t# <function address>\n"); \
2049 fprintf (STREAM, "\t.word\t0x00000000\t\t# <static chain value>\n"); \
2053 /* A C expression for the size in bytes of the trampoline, as an
2056 #define TRAMPOLINE_SIZE (32 + GET_MODE_SIZE (ptr_mode) * 2)
2058 /* Alignment required for trampolines, in bits. */
2060 #define TRAMPOLINE_ALIGNMENT GET_MODE_BITSIZE (ptr_mode)
2062 /* INITIALIZE_TRAMPOLINE calls this library function to flush
2063 program and data caches. */
2065 #ifndef CACHE_FLUSH_FUNC
2066 #define CACHE_FLUSH_FUNC "_flush_cache"
2069 /* A C statement to initialize the variable parts of a trampoline.
2070 ADDR is an RTX for the address of the trampoline; FNADDR is an
2071 RTX for the address of the nested function; STATIC_CHAIN is an
2072 RTX for the static chain value that should be passed to the
2073 function when it is called. */
2075 #define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \
2077 rtx func_addr, chain_addr; \
2079 func_addr = plus_constant (ADDR, 32); \
2080 chain_addr = plus_constant (func_addr, GET_MODE_SIZE (ptr_mode)); \
2081 emit_move_insn (gen_rtx_MEM (ptr_mode, func_addr), FUNC); \
2082 emit_move_insn (gen_rtx_MEM (ptr_mode, chain_addr), CHAIN); \
2084 /* Flush both caches. We need to flush the data cache in case \
2085 the system has a write-back cache. */ \
2086 /* ??? Should check the return value for errors. */ \
2087 if (mips_cache_flush_func && mips_cache_flush_func[0]) \
2088 emit_library_call (gen_rtx_SYMBOL_REF (Pmode, mips_cache_flush_func), \
2089 0, VOIDmode, 3, ADDR, Pmode, \
2090 GEN_INT (TRAMPOLINE_SIZE), TYPE_MODE (integer_type_node),\
2091 GEN_INT (3), TYPE_MODE (integer_type_node)); \
2094 /* Addressing modes, and classification of registers for them. */
2096 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
2097 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2098 mips_regno_mode_ok_for_base_p (REGNO, MODE, 1)
2100 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
2101 and check its validity for a certain class.
2102 We have two alternate definitions for each of them.
2103 The usual definition accepts all pseudo regs; the other rejects them all.
2104 The symbol REG_OK_STRICT causes the latter definition to be used.
2106 Most source files want to accept pseudo regs in the hope that
2107 they will get allocated to the class that the insn wants them to be in.
2108 Some source files that are used after register allocation
2109 need to be strict. */
2111 #ifndef REG_OK_STRICT
2112 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2113 mips_regno_mode_ok_for_base_p (REGNO (X), MODE, 0)
2115 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2116 mips_regno_mode_ok_for_base_p (REGNO (X), MODE, 1)
2119 #define REG_OK_FOR_INDEX_P(X) 0
2122 /* Maximum number of registers that can appear in a valid memory address. */
2124 #define MAX_REGS_PER_ADDRESS 1
2126 #ifdef REG_OK_STRICT
2127 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2129 if (mips_legitimate_address_p (MODE, X, 1)) \
2133 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2135 if (mips_legitimate_address_p (MODE, X, 0)) \
2140 /* Check for constness inline but use mips_legitimate_address_p
2141 to check whether a constant really is an address. */
2143 #define CONSTANT_ADDRESS_P(X) \
2144 (CONSTANT_P (X) && mips_legitimate_address_p (SImode, X, 0))
2146 #define LEGITIMATE_CONSTANT_P(X) (mips_const_insns (X) > 0)
2148 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
2150 if (mips_legitimize_address (&(X), MODE)) \
2155 /* A C statement or compound statement with a conditional `goto
2156 LABEL;' executed if memory address X (an RTX) can have different
2157 meanings depending on the machine mode of the memory reference it
2160 Autoincrement and autodecrement addresses typically have
2161 mode-dependent effects because the amount of the increment or
2162 decrement is the size of the operand being addressed. Some
2163 machines have other mode-dependent addresses. Many RISC machines
2164 have no mode-dependent addresses.
2166 You may assume that ADDR is a valid address for the machine. */
2168 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
2170 /* This handles the magic '..CURRENT_FUNCTION' symbol, which means
2171 'the start of the function that this code is output in'. */
2173 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
2174 if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
2175 asm_fprintf ((FILE), "%U%s", \
2176 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
2178 asm_fprintf ((FILE), "%U%s", (NAME))
2180 /* Flag to mark a function decl symbol that requires a long call. */
2181 #define SYMBOL_FLAG_LONG_CALL (SYMBOL_FLAG_MACH_DEP << 0)
2182 #define SYMBOL_REF_LONG_CALL_P(X) \
2183 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_LONG_CALL) != 0)
2185 /* Specify the machine mode that this machine uses
2186 for the index in the tablejump instruction.
2187 ??? Using HImode in mips16 mode can cause overflow. */
2188 #define CASE_VECTOR_MODE \
2189 (TARGET_MIPS16 ? HImode : ptr_mode)
2191 /* Define as C expression which evaluates to nonzero if the tablejump
2192 instruction expects the table to contain offsets from the address of the
2194 Do not define this if the table should contain absolute addresses. */
2195 #define CASE_VECTOR_PC_RELATIVE (TARGET_MIPS16)
2197 /* Define this as 1 if `char' should by default be signed; else as 0. */
2198 #ifndef DEFAULT_SIGNED_CHAR
2199 #define DEFAULT_SIGNED_CHAR 1
2202 /* Max number of bytes we can move from memory to memory
2203 in one reasonably fast instruction. */
2204 #define MOVE_MAX (TARGET_64BIT ? 8 : 4)
2205 #define MAX_MOVE_MAX 8
2207 /* Define this macro as a C expression which is nonzero if
2208 accessing less than a word of memory (i.e. a `char' or a
2209 `short') is no faster than accessing a word of memory, i.e., if
2210 such access require more than one instruction or if there is no
2211 difference in cost between byte and (aligned) word loads.
2213 On RISC machines, it tends to generate better code to define
2214 this as 1, since it avoids making a QI or HI mode register. */
2215 #define SLOW_BYTE_ACCESS 1
2217 /* Define this to be nonzero if shift instructions ignore all but the low-order
2219 #define SHIFT_COUNT_TRUNCATED 1
2221 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
2222 is done just by pretending it is already truncated. */
2223 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) \
2224 (TARGET_64BIT ? ((INPREC) <= 32 || (OUTPREC) > 32) : 1)
2227 /* Specify the machine mode that pointers have.
2228 After generation of rtl, the compiler makes no further distinction
2229 between pointers and any other objects of this machine mode. */
2232 #define Pmode (TARGET_64BIT && TARGET_LONG64 ? DImode : SImode)
2235 /* Give call MEMs SImode since it is the "most permissive" mode
2236 for both 32-bit and 64-bit targets. */
2238 #define FUNCTION_MODE SImode
2241 /* The cost of loading values from the constant pool. It should be
2242 larger than the cost of any constant we want to synthesize in-line. */
2244 #define CONSTANT_POOL_COST COSTS_N_INSNS (8)
2246 /* A C expression for the cost of moving data from a register in
2247 class FROM to one in class TO. The classes are expressed using
2248 the enumeration values such as `GENERAL_REGS'. A value of 2 is
2249 the default; other values are interpreted relative to that.
2251 It is not required that the cost always equal 2 when FROM is the
2252 same as TO; on some machines it is expensive to move between
2253 registers if they are not general registers.
2255 If reload sees an insn consisting of a single `set' between two
2256 hard registers, and if `REGISTER_MOVE_COST' applied to their
2257 classes returns a value of 2, reload does not check to ensure
2258 that the constraints of the insn are met. Setting a cost of
2259 other than 2 will allow reload to verify that the constraints are
2260 met. You should do this if the `movM' pattern's constraints do
2261 not allow such copying. */
2263 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
2264 mips_register_move_cost (MODE, FROM, TO)
2266 #define MEMORY_MOVE_COST(MODE,CLASS,TO_P) \
2267 (mips_cost->memory_latency \
2268 + memory_move_secondary_cost ((MODE), (CLASS), (TO_P)))
2270 /* Define if copies to/from condition code registers should be avoided.
2272 This is needed for the MIPS because reload_outcc is not complete;
2273 it needs to handle cases where the source is a general or another
2274 condition code register. */
2275 #define AVOID_CCMODE_COPIES
2277 /* A C expression for the cost of a branch instruction. A value of
2278 1 is the default; other values are interpreted relative to that. */
2280 #define BRANCH_COST mips_cost->branch_cost
2281 #define LOGICAL_OP_NON_SHORT_CIRCUIT 0
2283 /* If defined, modifies the length assigned to instruction INSN as a
2284 function of the context in which it is used. LENGTH is an lvalue
2285 that contains the initially computed length of the insn and should
2286 be updated with the correct length of the insn. */
2287 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
2288 ((LENGTH) = mips_adjust_insn_length ((INSN), (LENGTH)))
2290 /* Return the asm template for a non-MIPS16 conditional branch instruction.
2291 OPCODE is the opcode's mnemonic and OPERANDS is the asm template for
2293 #define MIPS_BRANCH(OPCODE, OPERANDS) \
2294 "%*" OPCODE "%?\t" OPERANDS "%/"
2296 /* Return the asm template for a call. INSN is the instruction's mnemonic
2297 ("j" or "jal"), OPERANDS are its operands, and OPNO is the operand number
2300 When generating -mabicalls without explicit relocation operators,
2301 all calls should use assembly macros. Otherwise, all indirect
2302 calls should use "jr" or "jalr"; we will arrange to restore $gp
2303 afterwards if necessary. Finally, we can only generate direct
2304 calls for -mabicalls by temporarily switching to non-PIC mode. */
2305 #define MIPS_CALL(INSN, OPERANDS, OPNO) \
2306 (TARGET_ABICALLS && !TARGET_EXPLICIT_RELOCS \
2307 ? "%*" INSN "\t%" #OPNO "%/" \
2308 : REG_P (OPERANDS[OPNO]) \
2309 ? "%*" INSN "r\t%" #OPNO "%/" \
2311 ? (".option\tpic0\n\t" \
2312 "%*" INSN "\t%" #OPNO "%/\n\t" \
2314 : "%*" INSN "\t%" #OPNO "%/")
2316 /* Control the assembler format that we output. */
2318 /* Output to assembler file text saying following lines
2319 may contain character constants, extra white space, comments, etc. */
2322 #define ASM_APP_ON " #APP\n"
2325 /* Output to assembler file text saying following lines
2326 no longer contain unusual constructs. */
2329 #define ASM_APP_OFF " #NO_APP\n"
2332 #define REGISTER_NAMES \
2333 { "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
2334 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
2335 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
2336 "$24", "$25", "$26", "$27", "$28", "$sp", "$fp", "$31", \
2337 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", \
2338 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \
2339 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", \
2340 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31", \
2341 "hi", "lo", "", "$fcc0","$fcc1","$fcc2","$fcc3","$fcc4", \
2342 "$fcc5","$fcc6","$fcc7","", "", "$arg", "$frame", "$fakec", \
2343 "$c0r0", "$c0r1", "$c0r2", "$c0r3", "$c0r4", "$c0r5", "$c0r6", "$c0r7", \
2344 "$c0r8", "$c0r9", "$c0r10","$c0r11","$c0r12","$c0r13","$c0r14","$c0r15", \
2345 "$c0r16","$c0r17","$c0r18","$c0r19","$c0r20","$c0r21","$c0r22","$c0r23", \
2346 "$c0r24","$c0r25","$c0r26","$c0r27","$c0r28","$c0r29","$c0r30","$c0r31", \
2347 "$c2r0", "$c2r1", "$c2r2", "$c2r3", "$c2r4", "$c2r5", "$c2r6", "$c2r7", \
2348 "$c2r8", "$c2r9", "$c2r10","$c2r11","$c2r12","$c2r13","$c2r14","$c2r15", \
2349 "$c2r16","$c2r17","$c2r18","$c2r19","$c2r20","$c2r21","$c2r22","$c2r23", \
2350 "$c2r24","$c2r25","$c2r26","$c2r27","$c2r28","$c2r29","$c2r30","$c2r31", \
2351 "$c3r0", "$c3r1", "$c3r2", "$c3r3", "$c3r4", "$c3r5", "$c3r6", "$c3r7", \
2352 "$c3r8", "$c3r9", "$c3r10","$c3r11","$c3r12","$c3r13","$c3r14","$c3r15", \
2353 "$c3r16","$c3r17","$c3r18","$c3r19","$c3r20","$c3r21","$c3r22","$c3r23", \
2354 "$c3r24","$c3r25","$c3r26","$c3r27","$c3r28","$c3r29","$c3r30","$c3r31", \
2355 "$ac1hi","$ac1lo","$ac2hi","$ac2lo","$ac3hi","$ac3lo","$dsp_po","$dsp_sc", \
2356 "$dsp_ca","$dsp_ou","$dsp_cc","$dsp_ef" }
2358 /* List the "software" names for each register. Also list the numerical
2359 names for $fp and $sp. */
2361 #define ADDITIONAL_REGISTER_NAMES \
2363 { "$29", 29 + GP_REG_FIRST }, \
2364 { "$30", 30 + GP_REG_FIRST }, \
2365 { "at", 1 + GP_REG_FIRST }, \
2366 { "v0", 2 + GP_REG_FIRST }, \
2367 { "v1", 3 + GP_REG_FIRST }, \
2368 { "a0", 4 + GP_REG_FIRST }, \
2369 { "a1", 5 + GP_REG_FIRST }, \
2370 { "a2", 6 + GP_REG_FIRST }, \
2371 { "a3", 7 + GP_REG_FIRST }, \
2372 { "t0", 8 + GP_REG_FIRST }, \
2373 { "t1", 9 + GP_REG_FIRST }, \
2374 { "t2", 10 + GP_REG_FIRST }, \
2375 { "t3", 11 + GP_REG_FIRST }, \
2376 { "t4", 12 + GP_REG_FIRST }, \
2377 { "t5", 13 + GP_REG_FIRST }, \
2378 { "t6", 14 + GP_REG_FIRST }, \
2379 { "t7", 15 + GP_REG_FIRST }, \
2380 { "s0", 16 + GP_REG_FIRST }, \
2381 { "s1", 17 + GP_REG_FIRST }, \
2382 { "s2", 18 + GP_REG_FIRST }, \
2383 { "s3", 19 + GP_REG_FIRST }, \
2384 { "s4", 20 + GP_REG_FIRST }, \
2385 { "s5", 21 + GP_REG_FIRST }, \
2386 { "s6", 22 + GP_REG_FIRST }, \
2387 { "s7", 23 + GP_REG_FIRST }, \
2388 { "t8", 24 + GP_REG_FIRST }, \
2389 { "t9", 25 + GP_REG_FIRST }, \
2390 { "k0", 26 + GP_REG_FIRST }, \
2391 { "k1", 27 + GP_REG_FIRST }, \
2392 { "gp", 28 + GP_REG_FIRST }, \
2393 { "sp", 29 + GP_REG_FIRST }, \
2394 { "fp", 30 + GP_REG_FIRST }, \
2395 { "ra", 31 + GP_REG_FIRST }, \
2396 ALL_COP_ADDITIONAL_REGISTER_NAMES \
2399 /* This is meant to be redefined in the host dependent files. It is a
2400 set of alternative names and regnums for mips coprocessors. */
2402 #define ALL_COP_ADDITIONAL_REGISTER_NAMES
2404 /* A C compound statement to output to stdio stream STREAM the
2405 assembler syntax for an instruction operand X. X is an RTL
2408 CODE is a value that can be used to specify one of several ways
2409 of printing the operand. It is used when identical operands
2410 must be printed differently depending on the context. CODE
2411 comes from the `%' specification that was used to request
2412 printing of the operand. If the specification was just `%DIGIT'
2413 then CODE is 0; if the specification was `%LTR DIGIT' then CODE
2414 is the ASCII code for LTR.
2416 If X is a register, this macro should print the register's name.
2417 The names can be found in an array `reg_names' whose type is
2418 `char *[]'. `reg_names' is initialized from `REGISTER_NAMES'.
2420 When the machine description has a specification `%PUNCT' (a `%'
2421 followed by a punctuation character), this macro is called with
2422 a null pointer for X and the punctuation character for CODE.
2424 See mips.c for the MIPS specific codes. */
2426 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
2428 /* A C expression which evaluates to true if CODE is a valid
2429 punctuation character for use in the `PRINT_OPERAND' macro. If
2430 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no
2431 punctuation characters (except for the standard one, `%') are
2432 used in this way. */
2434 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) mips_print_operand_punct[CODE]
2436 /* A C compound statement to output to stdio stream STREAM the
2437 assembler syntax for an instruction operand that is a memory
2438 reference whose address is ADDR. ADDR is an RTL expression. */
2440 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
2443 /* A C statement, to be executed after all slot-filler instructions
2444 have been output. If necessary, call `dbr_sequence_length' to
2445 determine the number of slots filled in a sequence (zero if not
2446 currently outputting a sequence), to decide how many no-ops to
2447 output, or whatever.
2449 Don't define this macro if it has nothing to do, but it is
2450 helpful in reading assembly output if the extent of the delay
2451 sequence is made explicit (e.g. with white space).
2453 Note that output routines for instructions with delay slots must
2454 be prepared to deal with not being output as part of a sequence
2455 (i.e. when the scheduling pass is not run, or when no slot
2456 fillers could be found.) The variable `final_sequence' is null
2457 when not processing a sequence, otherwise it contains the
2458 `sequence' rtx being output. */
2460 #define DBR_OUTPUT_SEQEND(STREAM) \
2463 if (set_nomacro > 0 && --set_nomacro == 0) \
2464 fputs ("\t.set\tmacro\n", STREAM); \
2466 if (set_noreorder > 0 && --set_noreorder == 0) \
2467 fputs ("\t.set\treorder\n", STREAM); \
2469 fputs ("\n", STREAM); \
2474 /* How to tell the debugger about changes of source files. */
2475 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
2476 mips_output_filename (STREAM, NAME)
2478 /* mips-tfile does not understand .stabd directives. */
2479 #define DBX_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) do { \
2480 dbxout_begin_stabn_sline (LINE); \
2481 dbxout_stab_value_internal_label ("LM", &COUNTER); \
2484 /* Use .loc directives for SDB line numbers. */
2485 #define SDB_OUTPUT_SOURCE_LINE(STREAM, LINE) \
2486 fprintf (STREAM, "\t.loc\t%d %d\n", num_source_filenames, LINE)
2488 /* The MIPS implementation uses some labels for its own purpose. The
2489 following lists what labels are created, and are all formed by the
2490 pattern $L[a-z].*. The machine independent portion of GCC creates
2491 labels matching: $L[A-Z][0-9]+ and $L[0-9]+.
2493 LM[0-9]+ Silicon Graphics/ECOFF stabs label before each stmt.
2494 $Lb[0-9]+ Begin blocks for MIPS debug support
2495 $Lc[0-9]+ Label for use in s<xx> operation.
2496 $Le[0-9]+ End blocks for MIPS debug support */
2498 #undef ASM_DECLARE_OBJECT_NAME
2499 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
2500 mips_declare_object (STREAM, NAME, "", ":\n", 0)
2502 /* Globalizing directive for a label. */
2503 #define GLOBAL_ASM_OP "\t.globl\t"
2505 /* This says how to define a global common symbol. */
2507 #define ASM_OUTPUT_ALIGNED_DECL_COMMON mips_output_aligned_decl_common
2509 /* This says how to define a local common symbol (i.e., not visible to
2512 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
2513 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
2514 mips_declare_common_object (STREAM, NAME, "\n\t.lcomm\t", SIZE, ALIGN, false)
2517 /* This says how to output an external. It would be possible not to
2518 output anything and let undefined symbol become external. However
2519 the assembler uses length information on externals to allocate in
2520 data/sdata bss/sbss, thereby saving exec time. */
2522 #undef ASM_OUTPUT_EXTERNAL
2523 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \
2524 mips_output_external(STREAM,DECL,NAME)
2526 /* This is how to declare a function name. The actual work of
2527 emitting the label is moved to function_prologue, so that we can
2528 get the line number correctly emitted before the .ent directive,
2529 and after any .file directives. Define as empty so that the function
2530 is not declared before the .ent directive elsewhere. */
2532 #undef ASM_DECLARE_FUNCTION_NAME
2533 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL)
2535 #ifndef FUNCTION_NAME_ALREADY_DECLARED
2536 #define FUNCTION_NAME_ALREADY_DECLARED 0
2539 /* This is how to store into the string LABEL
2540 the symbol_ref name of an internal numbered label where
2541 PREFIX is the class of label and NUM is the number within the class.
2542 This is suitable for output with `assemble_name'. */
2544 #undef ASM_GENERATE_INTERNAL_LABEL
2545 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
2546 sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
2548 /* This is how to output an element of a case-vector that is absolute. */
2550 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
2551 fprintf (STREAM, "\t%s\t%sL%d\n", \
2552 ptr_mode == DImode ? ".dword" : ".word", \
2553 LOCAL_LABEL_PREFIX, \
2556 /* This is how to output an element of a case-vector. We can make the
2557 entries PC-relative in MIPS16 code and GP-relative when .gp(d)word
2560 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
2562 if (TARGET_MIPS16) \
2563 fprintf (STREAM, "\t.half\t%sL%d-%sL%d\n", \
2564 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \
2565 else if (TARGET_GPWORD) \
2566 fprintf (STREAM, "\t%s\t%sL%d\n", \
2567 ptr_mode == DImode ? ".gpdword" : ".gpword", \
2568 LOCAL_LABEL_PREFIX, VALUE); \
2570 fprintf (STREAM, "\t%s\t%sL%d\n", \
2571 ptr_mode == DImode ? ".dword" : ".word", \
2572 LOCAL_LABEL_PREFIX, VALUE); \
2575 /* When generating MIPS16 code, we want the jump table to be in the text
2576 section so that we can load its address using a PC-relative addition. */
2577 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_MIPS16
2579 /* This is how to output an assembler line
2580 that says to advance the location counter
2581 to a multiple of 2**LOG bytes. */
2583 #define ASM_OUTPUT_ALIGN(STREAM,LOG) \
2584 fprintf (STREAM, "\t.align\t%d\n", (LOG))
2586 /* This is how to output an assembler line to advance the location
2587 counter by SIZE bytes. */
2589 #undef ASM_OUTPUT_SKIP
2590 #define ASM_OUTPUT_SKIP(STREAM,SIZE) \
2591 fprintf (STREAM, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))
2593 /* This is how to output a string. */
2594 #undef ASM_OUTPUT_ASCII
2595 #define ASM_OUTPUT_ASCII(STREAM, STRING, LEN) \
2596 mips_output_ascii (STREAM, STRING, LEN, "\t.ascii\t")
2598 /* Output #ident as a in the read-only data section. */
2599 #undef ASM_OUTPUT_IDENT
2600 #define ASM_OUTPUT_IDENT(FILE, STRING) \
2602 const char *p = STRING; \
2603 int size = strlen (p) + 1; \
2604 switch_to_section (readonly_data_section); \
2605 assemble_string (p, size); \
2608 /* Default to -G 8 */
2609 #ifndef MIPS_DEFAULT_GVALUE
2610 #define MIPS_DEFAULT_GVALUE 8
2613 /* Define the strings to put out for each section in the object file. */
2614 #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
2615 #define DATA_SECTION_ASM_OP "\t.data" /* large data */
2617 #undef READONLY_DATA_SECTION_ASM_OP
2618 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" /* read-only data */
2620 #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
2623 fprintf (STREAM, "\t%s\t%s,%s,8\n\t%s\t%s,0(%s)\n", \
2624 TARGET_64BIT ? "dsubu" : "subu", \
2625 reg_names[STACK_POINTER_REGNUM], \
2626 reg_names[STACK_POINTER_REGNUM], \
2627 TARGET_64BIT ? "sd" : "sw", \
2629 reg_names[STACK_POINTER_REGNUM]); \
2633 #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
2636 if (! set_noreorder) \
2637 fprintf (STREAM, "\t.set\tnoreorder\n"); \
2639 fprintf (STREAM, "\t%s\t%s,0(%s)\n\t%s\t%s,%s,8\n", \
2640 TARGET_64BIT ? "ld" : "lw", \
2642 reg_names[STACK_POINTER_REGNUM], \
2643 TARGET_64BIT ? "daddu" : "addu", \
2644 reg_names[STACK_POINTER_REGNUM], \
2645 reg_names[STACK_POINTER_REGNUM]); \
2647 if (! set_noreorder) \
2648 fprintf (STREAM, "\t.set\treorder\n"); \
2652 /* How to start an assembler comment.
2653 The leading space is important (the mips native assembler requires it). */
2654 #ifndef ASM_COMMENT_START
2655 #define ASM_COMMENT_START " #"
2658 /* Default definitions for size_t and ptrdiff_t. We must override the
2659 definitions from ../svr4.h on mips-*-linux-gnu. */
2662 #define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
2665 #define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
2668 /* Since the bits of the _init and _fini function is spread across
2669 many object files, each potentially with its own GP, we must assume
2670 we need to load our GP. We don't preserve $gp or $ra, since each
2671 init/fini chunk is supposed to initialize $gp, and crti/crtn
2672 already take care of preserving $ra and, when appropriate, $gp. */
2673 #if (defined _ABIO32 && _MIPS_SIM == _ABIO32)
2674 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2675 asm (SECTION_OP "\n\
2681 jal " USER_LABEL_PREFIX #FUNC "\n\
2682 " TEXT_SECTION_ASM_OP);
2683 #endif /* Switch to #elif when we're no longer limited by K&R C. */
2684 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
2685 || (defined _ABI64 && _MIPS_SIM == _ABI64)
2686 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2687 asm (SECTION_OP "\n\
2692 .cpsetup $31, $2, 1b\n\
2693 jal " USER_LABEL_PREFIX #FUNC "\n\
2694 " TEXT_SECTION_ASM_OP);
2699 #define HAVE_AS_TLS 0
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