1 /* Definitions of target machine for GNU compiler, Mitsubishi M32R cpu.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 #undef SWITCH_TAKES_ARG
27 #undef WORD_SWITCH_TAKES_ARG
28 #undef HANDLE_SYSV_PRAGMA
32 #undef WCHAR_TYPE_SIZE
34 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
41 #undef SUBTARGET_SWITCHES
44 /* M32R/X overrides. */
45 /* Print subsidiary information on the compiler version in use. */
46 #define TARGET_VERSION fprintf (stderr, " (m32r/x)");
48 /* Additional flags for the preprocessor. */
49 #define CPP_CPU_SPEC "%{m32rx:-D__M32RX__} %{m32r:-U__M32RX__}"
51 /* Assembler switches. */
52 #define ASM_CPU_SPEC \
53 "%{m32r} %{m32rx} %{!O0: %{O*: -O}} --no-warn-explicit-parallel-conflicts"
55 /* Use m32rx specific crt0/crtinit/crtfini files. */
56 #define STARTFILE_CPU_SPEC "%{!shared:crt0.o%s} %{m32rx:m32rx/crtinit.o%s} %{!m32rx:crtinit.o%s}"
57 #define ENDFILE_CPU_SPEC "-lgloss %{m32rx:m32rx/crtfini.o%s} %{!m32rx:crtfini.o%s}"
59 /* Extra machine dependent switches. */
60 #define SUBTARGET_SWITCHES \
61 { "32rx", TARGET_M32RX_MASK, "Compile for the m32rx" }, \
62 { "32r", -TARGET_M32RX_MASK, "" },
64 /* Define this macro as a C expression for the initializer of an array of
65 strings to tell the driver program which options are defaults for this
66 target and thus do not need to be handled specially when using
67 `MULTILIB_OPTIONS'. */
68 #define SUBTARGET_MULTILIB_DEFAULTS , "m32r"
70 /* Number of additional registers the subtarget defines. */
71 #define SUBTARGET_NUM_REGISTERS 1
73 /* 1 for registers that cannot be allocated. */
74 #define SUBTARGET_FIXED_REGISTERS , 1
76 /* 1 for registers that are not available across function calls. */
77 #define SUBTARGET_CALL_USED_REGISTERS , 1
79 /* Order to allocate model specific registers. */
80 #define SUBTARGET_REG_ALLOC_ORDER , 19
82 /* Registers which are accumulators. */
83 #define SUBTARGET_REG_CLASS_ACCUM 0x80000
85 /* All registers added. */
86 #define SUBTARGET_REG_CLASS_ALL SUBTARGET_REG_CLASS_ACCUM
88 /* Additional accumulator registers. */
89 #define SUBTARGET_ACCUM_P(REGNO) ((REGNO) == 19)
91 /* Define additional register names. */
92 #define SUBTARGET_REGISTER_NAMES , "a1"
93 /* end M32R/X overrides. */
95 /* Print subsidiary information on the compiler version in use. */
96 #ifndef TARGET_VERSION
97 #define TARGET_VERSION fprintf (stderr, " (m32r)")
100 /* Switch Recognition by gcc.c. Add -G xx support */
102 #undef SWITCH_TAKES_ARG
103 #define SWITCH_TAKES_ARG(CHAR) \
104 (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')
106 /* Names to predefine in the preprocessor for this target machine. */
107 /* __M32R__ is defined by the existing compiler so we use that. */
108 #define CPP_PREDEFINES "-Acpu=m32r -Amachine=m32r -D__M32R__"
110 /* This macro defines names of additional specifications to put in the specs
111 that can be used in various specifications like CC1_SPEC. Its definition
112 is an initializer with a subgrouping for each command option.
114 Each subgrouping contains a string constant, that defines the
115 specification name, and a string constant that used by the GNU CC driver
118 Do not define this macro if it does not need to do anything. */
120 #ifndef SUBTARGET_EXTRA_SPECS
121 #define SUBTARGET_EXTRA_SPECS
125 #define ASM_CPU_SPEC ""
129 #define CPP_CPU_SPEC ""
133 #define CC1_CPU_SPEC ""
136 #ifndef LINK_CPU_SPEC
137 #define LINK_CPU_SPEC ""
140 #ifndef STARTFILE_CPU_SPEC
141 #define STARTFILE_CPU_SPEC "%{!shared:crt0.o%s} crtinit.o%s"
144 #ifndef ENDFILE_CPU_SPEC
145 #define ENDFILE_CPU_SPEC "-lgloss crtfini.o%s"
149 #if 0 /* not supported yet */
150 #define RELAX_SPEC "%{mrelax:-relax}"
152 #define RELAX_SPEC ""
156 #define EXTRA_SPECS \
157 { "asm_cpu", ASM_CPU_SPEC }, \
158 { "cpp_cpu", CPP_CPU_SPEC }, \
159 { "cc1_cpu", CC1_CPU_SPEC }, \
160 { "link_cpu", LINK_CPU_SPEC }, \
161 { "startfile_cpu", STARTFILE_CPU_SPEC }, \
162 { "endfile_cpu", ENDFILE_CPU_SPEC }, \
163 { "relax", RELAX_SPEC }, \
164 SUBTARGET_EXTRA_SPECS
166 #define CC1_SPEC "%{G*} %(cc1_cpu)"
168 /* Options to pass on to the assembler. */
170 #define ASM_SPEC "%{v} %(asm_cpu) %(relax)"
172 #undef ASM_FINAL_SPEC
174 #define LINK_SPEC "%{v} %(link_cpu) %(relax)"
176 #undef STARTFILE_SPEC
177 #define STARTFILE_SPEC "%(startfile_cpu)"
180 #define ENDFILE_SPEC "%(endfile_cpu)"
184 /* Run-time compilation parameters selecting different hardware subsets. */
186 extern int target_flags;
188 /* If non-zero, tell the linker to do relaxing.
189 We don't do anything with the option, other than recognize it.
190 LINK_SPEC handles passing -relax to the linker.
191 This can cause incorrect debugging information as line numbers may
192 turn out wrong. This shouldn't be specified unless accompanied with -O2
193 [where the user expects debugging information to be less accurate]. */
194 #define TARGET_RELAX_MASK (1 << 0)
196 /* For miscellaneous debugging purposes. */
197 #define TARGET_DEBUG_MASK (1 << 1)
198 #define TARGET_DEBUG (target_flags & TARGET_DEBUG_MASK)
200 /* Align loops to 32 byte boundaries (cache line size). */
201 /* ??? This option is experimental and is not documented. */
202 #define TARGET_ALIGN_LOOPS_MASK (1 << 2)
203 #define TARGET_ALIGN_LOOPS (target_flags & TARGET_ALIGN_LOOPS_MASK)
205 /* Change issue rate. */
206 #define TARGET_LOW_ISSUE_RATE_MASK (1 << 3)
207 #define TARGET_LOW_ISSUE_RATE (target_flags & TARGET_LOW_ISSUE_RATE_MASK)
209 /* Change branch cost */
210 #define TARGET_BRANCH_COST_MASK (1 << 4)
211 #define TARGET_BRANCH_COST (target_flags & TARGET_BRANCH_COST_MASK)
213 /* Target machine to compile for. */
214 #define TARGET_M32R 1
216 /* Support extended instruction set. */
217 #define TARGET_M32RX_MASK (1 << 5)
218 #define TARGET_M32RX (target_flags & TARGET_M32RX_MASK)
220 #define TARGET_M32R (! TARGET_M32RX)
222 /* Macro to define tables used to set the flags.
223 This is a list in braces of pairs in braces,
224 each pair being { "NAME", VALUE }
225 where VALUE is the bits to set or minus the bits to clear.
226 An empty string NAME is used to identify the default VALUE. */
228 #ifndef SUBTARGET_SWITCHES
229 #define SUBTARGET_SWITCHES
232 #ifndef TARGET_DEFAULT
233 #define TARGET_DEFAULT 0
236 #define TARGET_SWITCHES \
238 /* { "relax", TARGET_RELAX_MASK, "" }, \
239 { "no-relax", -TARGET_RELAX_MASK, "" },*/ \
240 { "debug", TARGET_DEBUG_MASK, \
241 N_("Display compile time statistics") }, \
242 { "align-loops", TARGET_ALIGN_LOOPS_MASK, \
243 N_("Align all loops to 32 byte boundary") }, \
244 { "no-align-loops", -TARGET_ALIGN_LOOPS_MASK, "" }, \
245 { "issue-rate=1", TARGET_LOW_ISSUE_RATE_MASK, \
246 N_("Only issue one instruction per cycle") }, \
247 { "issue-rate=2", -TARGET_LOW_ISSUE_RATE_MASK, "" }, \
248 { "branch-cost=1", TARGET_BRANCH_COST_MASK, \
249 N_("Prefer branches over conditional execution") }, \
250 { "branch-cost=2", -TARGET_BRANCH_COST_MASK, "" }, \
252 { "", TARGET_DEFAULT, "" } \
255 extern const char * m32r_model_string;
256 extern const char * m32r_sdata_string;
258 #ifndef SUBTARGET_OPTIONS
259 #define SUBTARGET_OPTIONS
262 #define TARGET_OPTIONS \
264 { "model=", & m32r_model_string, \
265 N_("Code size: small, medium or large") }, \
266 { "sdata=", & m32r_sdata_string, \
267 N_("Small data area: none, sdata, use") } \
273 Code models are used to select between two choices of two separate
274 possibilities (address space size, call insn to use):
276 small: addresses use 24 bits, use bl to make calls
277 medium: addresses use 32 bits, use bl to make calls (*1)
278 large: addresses use 32 bits, use seth/add3/jl to make calls (*2)
280 The fourth is "addresses use 24 bits, use seth/add3/jl to make calls" but
281 using this one doesn't make much sense.
283 (*1) The linker may eventually be able to relax seth/add3 -> ld24.
284 (*2) The linker may eventually be able to relax seth/add3/jl -> bl.
286 Internally these are recorded as TARGET_ADDR{24,32} and
289 The __model__ attribute can be used to select the code model to use when
290 accessing particular objects. */
292 enum m32r_model { M32R_MODEL_SMALL, M32R_MODEL_MEDIUM, M32R_MODEL_LARGE };
294 extern enum m32r_model m32r_model;
295 #define TARGET_MODEL_SMALL (m32r_model == M32R_MODEL_SMALL)
296 #define TARGET_MODEL_MEDIUM (m32r_model == M32R_MODEL_MEDIUM)
297 #define TARGET_MODEL_LARGE (m32r_model == M32R_MODEL_LARGE)
298 #define TARGET_ADDR24 (m32r_model == M32R_MODEL_SMALL)
299 #define TARGET_ADDR32 (! TARGET_ADDR24)
300 #define TARGET_CALL26 (! TARGET_CALL32)
301 #define TARGET_CALL32 (m32r_model == M32R_MODEL_LARGE)
303 /* The default is the small model. */
304 #ifndef M32R_MODEL_DEFAULT
305 #define M32R_MODEL_DEFAULT "small"
310 The SDA consists of sections .sdata, .sbss, and .scommon.
311 .scommon isn't a real section, symbols in it have their section index
312 set to SHN_M32R_SCOMMON, though support for it exists in the linker script.
314 Two switches control the SDA:
316 -G NNN - specifies the maximum size of variable to go in the SDA
318 -msdata=foo - specifies how such variables are handled
320 -msdata=none - small data area is disabled
322 -msdata=sdata - small data goes in the SDA, special code isn't
323 generated to use it, and special relocs aren't
326 -msdata=use - small data goes in the SDA, special code is generated
327 to use the SDA and special relocs are generated
329 The SDA is not multilib'd, it isn't necessary.
330 MULTILIB_EXTRA_OPTS is set in tmake_file to -msdata=sdata so multilib'd
331 libraries have small data in .sdata/SHN_M32R_SCOMMON so programs that use
332 -msdata=use will successfully link with them (references in header files
333 will cause the compiler to emit code that refers to library objects in
334 .data). ??? There can be a problem if the user passes a -G value greater
335 than the default and a library object in a header file is that size.
336 The default is 8 so this should be rare - if it occurs the user
337 is required to rebuild the libraries or use a smaller value for -G.
340 /* Maximum size of variables that go in .sdata/.sbss.
341 The -msdata=foo switch also controls how small variables are handled. */
342 #ifndef SDATA_DEFAULT_SIZE
343 #define SDATA_DEFAULT_SIZE 8
346 extern int g_switch_value; /* value of the -G xx switch */
347 extern int g_switch_set; /* whether -G xx was passed. */
349 enum m32r_sdata { M32R_SDATA_NONE, M32R_SDATA_SDATA, M32R_SDATA_USE };
351 extern enum m32r_sdata m32r_sdata;
352 #define TARGET_SDATA_NONE (m32r_sdata == M32R_SDATA_NONE)
353 #define TARGET_SDATA_SDATA (m32r_sdata == M32R_SDATA_SDATA)
354 #define TARGET_SDATA_USE (m32r_sdata == M32R_SDATA_USE)
356 /* Default is to disable the SDA
357 [for upward compatibility with previous toolchains]. */
358 #ifndef M32R_SDATA_DEFAULT
359 #define M32R_SDATA_DEFAULT "none"
362 /* Define this macro as a C expression for the initializer of an array of
363 strings to tell the driver program which options are defaults for this
364 target and thus do not need to be handled specially when using
365 `MULTILIB_OPTIONS'. */
366 #ifndef SUBTARGET_MULTILIB_DEFAULTS
367 #define SUBTARGET_MULTILIB_DEFAULTS
370 #ifndef MULTILIB_DEFAULTS
371 #define MULTILIB_DEFAULTS { "mmodel=small" SUBTARGET_MULTILIB_DEFAULTS }
374 /* Sometimes certain combinations of command options do not make
375 sense on a particular target machine. You can define a macro
376 `OVERRIDE_OPTIONS' to take account of this. This macro, if
377 defined, is executed once just after all the command options have
380 Don't use this macro to turn on various extra optimizations for
381 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
383 #ifndef SUBTARGET_OVERRIDE_OPTIONS
384 #define SUBTARGET_OVERRIDE_OPTIONS
387 #define OVERRIDE_OPTIONS \
390 /* These need to be done at start up. \
391 It's convenient to do them here. */ \
393 SUBTARGET_OVERRIDE_OPTIONS \
397 #ifndef SUBTARGET_OPTIMIZATION_OPTIONS
398 #define SUBTARGET_OPTIMIZATION_OPTIONS
401 #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \
405 flag_regmove = TRUE; \
409 flag_omit_frame_pointer = TRUE; \
410 flag_strength_reduce = FALSE; \
413 SUBTARGET_OPTIMIZATION_OPTIONS \
417 /* Define this macro if debugging can be performed even without a
418 frame pointer. If this macro is defined, GNU CC will turn on the
419 `-fomit-frame-pointer' option whenever `-O' is specified. */
420 #define CAN_DEBUG_WITHOUT_FP
422 /* Target machine storage layout. */
424 /* Define to use software floating point emulator for REAL_ARITHMETIC and
425 decimal <-> binary conversion. */
426 #define REAL_ARITHMETIC
428 /* Define this if most significant bit is lowest numbered
429 in instructions that operate on numbered bit-fields. */
430 #define BITS_BIG_ENDIAN 1
432 /* Define this if most significant byte of a word is the lowest numbered. */
433 #define BYTES_BIG_ENDIAN 1
435 /* Define this if most significant word of a multiword number is the lowest
437 #define WORDS_BIG_ENDIAN 1
439 /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must
440 be a constant value with the same meaning as WORDS_BIG_ENDIAN,
441 which will be used only when compiling libgcc2.c. Typically the
442 value will be set based on preprocessor defines. */
443 /*#define LIBGCC2_WORDS_BIG_ENDIAN 1*/
445 /* Width of a word, in units (bytes). */
446 #define UNITS_PER_WORD 4
448 /* Define this macro if it is advisable to hold scalars in registers
449 in a wider mode than that declared by the program. In such cases,
450 the value is constrained to be within the bounds of the declared
451 type, but kept valid in the wider mode. The signedness of the
452 extension may differ from that of the type. */
453 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
454 if (GET_MODE_CLASS (MODE) == MODE_INT \
455 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
460 /* Define this macro if the promotion described by `PROMOTE_MODE'
461 should also be done for outgoing function arguments. */
462 /*#define PROMOTE_FUNCTION_ARGS*/
464 /* Likewise, if the function return value is promoted.
465 If defined, FUNCTION_VALUE must perform the same promotions done by
467 /*#define PROMOTE_FUNCTION_RETURN*/
469 /* Width in bits of a pointer.
470 See also the macro `Pmode' defined below. */
471 #define POINTER_SIZE 32
473 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
474 #define PARM_BOUNDARY 32
476 /* Boundary (in *bits*) on which stack pointer should be aligned. */
477 #define STACK_BOUNDARY 32
479 /* ALIGN FRAMES on word boundaries */
480 #define M32R_STACK_ALIGN(LOC) (((LOC)+3) & ~3)
482 /* Allocation boundary (in *bits*) for the code of a function. */
483 #define FUNCTION_BOUNDARY 32
485 /* Alignment of field after `int : 0' in a structure. */
486 #define EMPTY_FIELD_BOUNDARY 32
488 /* Every structure's size must be a multiple of this. */
489 #define STRUCTURE_SIZE_BOUNDARY 8
491 /* A bitfield declared as `int' forces `int' alignment for the struct. */
492 #define PCC_BITFIELD_TYPE_MATTERS 1
494 /* No data type wants to be aligned rounder than this. */
495 #define BIGGEST_ALIGNMENT 32
497 /* The best alignment to use in cases where we have a choice. */
498 #define FASTEST_ALIGNMENT 32
500 /* Make strings word-aligned so strcpy from constants will be faster. */
501 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
502 ((TREE_CODE (EXP) == STRING_CST \
503 && (ALIGN) < FASTEST_ALIGNMENT) \
504 ? FASTEST_ALIGNMENT : (ALIGN))
506 /* Make arrays of chars word-aligned for the same reasons. */
507 #define DATA_ALIGNMENT(TYPE, ALIGN) \
508 (TREE_CODE (TYPE) == ARRAY_TYPE \
509 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
510 && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
512 /* Set this nonzero if move instructions will actually fail to work
513 when given unaligned data. */
514 #define STRICT_ALIGNMENT 1
516 /* Layout of source language data types. */
518 #define SHORT_TYPE_SIZE 16
519 #define INT_TYPE_SIZE 32
520 #define LONG_TYPE_SIZE 32
521 #define LONG_LONG_TYPE_SIZE 64
522 #define FLOAT_TYPE_SIZE 32
523 #define DOUBLE_TYPE_SIZE 64
524 #define LONG_DOUBLE_TYPE_SIZE 64
526 /* Define this as 1 if `char' should by default be signed; else as 0. */
527 #define DEFAULT_SIGNED_CHAR 1
529 #define SIZE_TYPE "long unsigned int"
530 #define PTRDIFF_TYPE "long int"
531 #define WCHAR_TYPE "short unsigned int"
532 #define WCHAR_TYPE_SIZE 16
534 /* Standard register usage. */
536 /* Number of actual hardware registers.
537 The hardware registers are assigned numbers for the compiler
538 from 0 to just below FIRST_PSEUDO_REGISTER.
539 All registers that the compiler knows about must be given numbers,
540 even those that are not normally considered general registers. */
542 #define M32R_NUM_REGISTERS 19
544 #ifndef SUBTARGET_NUM_REGISTERS
545 #define SUBTARGET_NUM_REGISTERS 0
548 #define FIRST_PSEUDO_REGISTER (M32R_NUM_REGISTERS + SUBTARGET_NUM_REGISTERS)
550 /* 1 for registers that have pervasive standard uses
551 and are not available for the register allocator.
553 0-3 - arguments/results
554 4-5 - call used [4 is used as a tmp during prologue/epilogue generation]
556 7 - call used, static chain pointer
558 12 - call saved [reserved for global pointer]
560 14 - subroutine link register
565 19 - accumulator 1 in the m32r/x
566 By default, the extension registers are not available. */
568 #ifndef SUBTARGET_FIXED_REGISTERS
569 #define SUBTARGET_FIXED_REGISTERS
572 #define FIXED_REGISTERS \
574 0, 0, 0, 0, 0, 0, 0, 0, \
575 0, 0, 0, 0, 0, 0, 0, 1, \
577 SUBTARGET_FIXED_REGISTERS \
580 /* 1 for registers not available across function calls.
581 These must include the FIXED_REGISTERS and also any
582 registers that can be used without being saved.
583 The latter must include the registers where values are returned
584 and the register where structure-value addresses are passed.
585 Aside from that, you can include as many other registers as you like. */
587 #ifndef SUBTARGET_CALL_USED_REGISTERS
588 #define SUBTARGET_CALL_USED_REGISTERS
591 #define CALL_USED_REGISTERS \
593 1, 1, 1, 1, 1, 1, 1, 1, \
594 0, 0, 0, 0, 0, 0, 1, 1, \
596 SUBTARGET_CALL_USED_REGISTERS \
599 /* Zero or more C statements that may conditionally modify two variables
600 `fixed_regs' and `call_used_regs' (both of type `char []') after they
601 have been initialized from the two preceding macros.
603 This is necessary in case the fixed or call-clobbered registers depend
606 You need not define this macro if it has no work to do. */
608 #ifdef SUBTARGET_CONDITIONAL_REGISTER_USAGE
609 #define CONDITIONAL_REGISTER_USAGE SUBTARGET_CONDITIONAL_REGISTER_USAGE
612 /* If defined, an initializer for a vector of integers, containing the
613 numbers of hard registers in the order in which GNU CC should
614 prefer to use them (from most preferred to least). */
616 #ifndef SUBTARGET_REG_ALLOC_ORDER
617 #define SUBTARGET_REG_ALLOC_ORDER
620 #if 1 /* better for int code */
621 #define REG_ALLOC_ORDER \
623 4, 5, 6, 7, 2, 3, 8, 9, 10, \
624 11, 12, 13, 14, 0, 1, 15, 16, 17, 18 \
625 SUBTARGET_REG_ALLOC_ORDER \
628 #else /* better for fp code at expense of int code */
629 #define REG_ALLOC_ORDER \
631 0, 1, 2, 3, 4, 5, 6, 7, 8, \
632 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 \
633 SUBTARGET_REG_ALLOC_ORDER \
637 /* Return number of consecutive hard regs needed starting at reg REGNO
638 to hold something of mode MODE.
639 This is ordinarily the length in words of a value of mode MODE
640 but can be less for certain modes in special long registers. */
641 #define HARD_REGNO_NREGS(REGNO, MODE) \
642 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
644 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */
645 extern unsigned int m32r_hard_regno_mode_ok[FIRST_PSEUDO_REGISTER];
646 extern unsigned int m32r_mode_class[];
647 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
648 ((m32r_hard_regno_mode_ok[REGNO] & m32r_mode_class[MODE]) != 0)
650 /* A C expression that is nonzero if it is desirable to choose
651 register allocation so as to avoid move instructions between a
652 value of mode MODE1 and a value of mode MODE2.
654 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R,
655 MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1,
656 MODE2)' must be zero. */
658 /* Tie QI/HI/SI modes together. */
659 #define MODES_TIEABLE_P(MODE1, MODE2) \
660 (GET_MODE_CLASS (MODE1) == MODE_INT \
661 && GET_MODE_CLASS (MODE2) == MODE_INT \
662 && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \
663 && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD)
665 /* Register classes and constants. */
667 /* Define the classes of registers for register constraints in the
668 machine description. Also define ranges of constants.
670 One of the classes must always be named ALL_REGS and include all hard regs.
671 If there is more than one class, another class must be named NO_REGS
672 and contain no registers.
674 The name GENERAL_REGS must be the name of a class (or an alias for
675 another name such as ALL_REGS). This is the class of registers
676 that is allowed by "g" or "r" in a register constraint.
677 Also, registers outside this class are allocated only when
678 instructions express preferences for them.
680 The classes must be numbered in nondecreasing order; that is,
681 a larger-numbered class must never be contained completely
682 in a smaller-numbered class.
684 For any two classes, it is very desirable that there be another
685 class that represents their union.
687 It is important that any condition codes have class NO_REGS.
688 See `register_operand'. */
692 NO_REGS, CARRY_REG, ACCUM_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES
695 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
697 /* Give names of register classes as strings for dump file. */
698 #define REG_CLASS_NAMES \
699 { "NO_REGS", "CARRY_REG", "ACCUM_REGS", "GENERAL_REGS", "ALL_REGS" }
701 /* Define which registers fit in which classes.
702 This is an initializer for a vector of HARD_REG_SET
703 of length N_REG_CLASSES. */
705 #ifndef SUBTARGET_REG_CLASS_CARRY
706 #define SUBTARGET_REG_CLASS_CARRY 0
709 #ifndef SUBTARGET_REG_CLASS_ACCUM
710 #define SUBTARGET_REG_CLASS_ACCUM 0
713 #ifndef SUBTARGET_REG_CLASS_GENERAL
714 #define SUBTARGET_REG_CLASS_GENERAL 0
717 #ifndef SUBTARGET_REG_CLASS_ALL
718 #define SUBTARGET_REG_CLASS_ALL 0
721 #define REG_CLASS_CONTENTS \
724 { 0x20000 | SUBTARGET_REG_CLASS_CARRY }, \
725 { 0x40000 | SUBTARGET_REG_CLASS_ACCUM }, \
726 { 0x1ffff | SUBTARGET_REG_CLASS_GENERAL }, \
727 { 0x7ffff | SUBTARGET_REG_CLASS_ALL }, \
730 /* The same information, inverted:
731 Return the class number of the smallest class containing
732 reg number REGNO. This could be a conditional expression
733 or could index an array. */
734 extern enum reg_class m32r_regno_reg_class[FIRST_PSEUDO_REGISTER];
735 #define REGNO_REG_CLASS(REGNO) (m32r_regno_reg_class[REGNO])
737 /* The class value for index registers, and the one for base regs. */
738 #define INDEX_REG_CLASS GENERAL_REGS
739 #define BASE_REG_CLASS GENERAL_REGS
741 #define REG_CLASS_FROM_LETTER(C) \
742 ((C) == 'c' ? CARRY_REG \
743 : (C) == 'a' ? ACCUM_REGS \
746 /* These assume that REGNO is a hard or pseudo reg number.
747 They give nonzero only if REGNO is a hard reg of the suitable class
748 or a pseudo reg currently allocated to a suitable hard reg.
749 Since they use reg_renumber, they are safe only once reg_renumber
750 has been allocated, which happens in local-alloc.c. */
751 #define REGNO_OK_FOR_BASE_P(REGNO) \
752 ((REGNO) < FIRST_PSEUDO_REGISTER \
753 ? GPR_P (REGNO) || (REGNO) == ARG_POINTER_REGNUM \
754 : GPR_P (reg_renumber[REGNO]))
755 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO)
757 /* Given an rtx X being reloaded into a reg required to be
758 in class CLASS, return the class of reg to actually use.
759 In general this is just CLASS; but on some machines
760 in some cases it is preferable to use a more restrictive class. */
761 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
764 /* Return the maximum number of consecutive registers
765 needed to represent mode MODE in a register of class CLASS. */
766 #define CLASS_MAX_NREGS(CLASS, MODE) \
767 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
769 /* The letters I, J, K, L, M, N, O, P in a register constraint string
770 can be used to stand for particular ranges of immediate operands.
771 This macro defines what the ranges are.
772 C is the letter, and VALUE is a constant value.
773 Return 1 if VALUE is in the range specified by C. */
774 /* 'I' is used for 8 bit signed immediates.
775 'J' is used for 16 bit signed immediates.
776 'K' is used for 16 bit unsigned immediates.
777 'L' is used for 16 bit immediates left shifted by 16 (sign ???).
778 'M' is used for 24 bit unsigned immediates.
779 'N' is used for any 32 bit non-symbolic value.
780 'O' is used for 5 bit unsigned immediates (shift count).
781 'P' is used for 16 bit signed immediates for compares
782 (values in the range -32767 to +32768). */
784 /* Return true if a value is inside a range. */
785 #define IN_RANGE_P(VALUE, LOW, HIGH) \
786 (((unsigned HOST_WIDE_INT)((VALUE) - (LOW))) \
787 <= ((unsigned HOST_WIDE_INT)((HIGH) - (LOW))))
789 /* Local to this file. */
790 #define INT8_P(X) ((X) >= -0x80 && (X) <= 0x7f)
791 #define INT16_P(X) ((X) >= -0x8000 && (X) <= 0x7fff)
792 #define CMP_INT16_P(X) ((X) >= -0x7fff && (X) <= 0x8000)
793 #define UPPER16_P(X) (((X) & 0xffff) == 0 \
794 && ((X) >> 16) >= -0x8000 \
795 && ((X) >> 16) <= 0x7fff)
796 #define UINT16_P(X) (((unsigned HOST_WIDE_INT) (X)) <= 0x0000ffff)
797 #define UINT24_P(X) (((unsigned HOST_WIDE_INT) (X)) <= 0x00ffffff)
798 #define UINT32_P(X) (((unsigned HOST_WIDE_INT) (X)) <= 0xffffffff)
799 #define UINT5_P(X) ((X) >= 0 && (X) < 32)
800 #define INVERTED_SIGNED_8BIT(VAL) ((VAL) >= -127 && (VAL) <= 128)
802 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
803 ((C) == 'I' ? INT8_P (VALUE) \
804 : (C) == 'J' ? INT16_P (VALUE) \
805 : (C) == 'K' ? UINT16_P (VALUE) \
806 : (C) == 'L' ? UPPER16_P (VALUE) \
807 : (C) == 'M' ? UINT24_P (VALUE) \
808 : (C) == 'N' ? INVERTED_SIGNED_8BIT (VALUE) \
809 : (C) == 'O' ? UINT5_P (VALUE) \
810 : (C) == 'P' ? CMP_INT16_P (VALUE) \
813 /* Similar, but for floating constants, and defining letters G and H.
814 Here VALUE is the CONST_DOUBLE rtx itself.
815 For the m32r, handle a few constants inline.
816 ??? We needn't treat DI and DF modes differently, but for now we do. */
817 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
818 ((C) == 'G' ? easy_di_const (VALUE) \
819 : (C) == 'H' ? easy_df_const (VALUE) \
822 /* A C expression that defines the optional machine-dependent constraint
823 letters that can be used to segregate specific types of operands,
824 usually memory references, for the target machine. It should return 1 if
825 VALUE corresponds to the operand type represented by the constraint letter
826 C. If C is not defined as an extra constraint, the value returned should
827 be 0 regardless of VALUE. */
828 /* Q is for symbolic addresses loadable with ld24.
829 R is for symbolic addresses when ld24 can't be used.
830 S is for stores with pre {inc,dec}rement
831 T is for indirect of a pointer.
832 U is for loads with post increment. */
834 #define EXTRA_CONSTRAINT(VALUE, C) \
835 ( (C) == 'Q' ? ((TARGET_ADDR24 && GET_CODE (VALUE) == LABEL_REF) \
836 || addr24_operand (VALUE, VOIDmode)) \
837 : (C) == 'R' ? ((TARGET_ADDR32 && GET_CODE (VALUE) == LABEL_REF) \
838 || addr32_operand (VALUE, VOIDmode)) \
839 : (C) == 'S' ? (GET_CODE (VALUE) == MEM \
840 && STORE_PREINC_PREDEC_P (GET_MODE (VALUE), \
842 : (C) == 'T' ? (GET_CODE (VALUE) == MEM \
843 && memreg_operand (VALUE, GET_MODE (VALUE))) \
844 : (C) == 'U' ? (GET_CODE (VALUE) == MEM \
845 && LOAD_POSTINC_P (GET_MODE (VALUE), \
849 /* Stack layout and stack pointer usage. */
851 /* Define this macro if pushing a word onto the stack moves the stack
852 pointer to a smaller address. */
853 #define STACK_GROWS_DOWNWARD
855 /* Define this if the nominal address of the stack frame
856 is at the high-address end of the local variables;
857 that is, each additional local variable allocated
858 goes at a more negative offset from the frame pointer. */
859 /*#define FRAME_GROWS_DOWNWARD*/
861 /* Offset from frame pointer to start allocating local variables at.
862 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
863 first local allocated. Otherwise, it is the offset to the BEGINNING
864 of the first local allocated. */
865 /* The frame pointer points at the same place as the stack pointer, except if
866 alloca has been called. */
867 #define STARTING_FRAME_OFFSET \
868 M32R_STACK_ALIGN (current_function_outgoing_args_size)
870 /* Offset from the stack pointer register to the first location at which
871 outgoing arguments are placed. */
872 #define STACK_POINTER_OFFSET 0
874 /* Offset of first parameter from the argument pointer register value. */
875 #define FIRST_PARM_OFFSET(FNDECL) 0
877 /* A C expression whose value is RTL representing the address in a
878 stack frame where the pointer to the caller's frame is stored.
879 Assume that FRAMEADDR is an RTL expression for the address of the
882 If you don't define this macro, the default is to return the value
883 of FRAMEADDR--that is, the stack frame address is also the address
884 of the stack word that points to the previous frame. */
885 /*define DYNAMIC_CHAIN_ADDRESS (FRAMEADDR)*/
887 /* A C expression whose value is RTL representing the value of the
888 return address for the frame COUNT steps up from the current frame.
889 FRAMEADDR is the frame pointer of the COUNT frame, or the frame
890 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME'
892 /* The current return address is in r14. */
893 #if 0 /* The default value should work. */
894 #define RETURN_ADDR_RTX(COUNT, FRAME) \
896 ? gen_rtx_REG (Pmode, 14) \
897 : copy_to_reg (gen_rtx_MEM (Pmode, \
898 memory_address (Pmode, \
899 plus_constant ((FRAME), \
903 /* Register to use for pushing function arguments. */
904 #define STACK_POINTER_REGNUM 15
906 /* Base register for access to local variables of the function. */
907 #define FRAME_POINTER_REGNUM 13
909 /* Base register for access to arguments of the function. */
910 #define ARG_POINTER_REGNUM 16
912 /* The register number of the return address pointer register, which
913 is used to access the current function's return address from the
914 stack. On some machines, the return address is not at a fixed
915 offset from the frame pointer or stack pointer or argument
916 pointer. This register can be defined to point to the return
917 address on the stack, and then be converted by `ELIMINABLE_REGS'
918 into either the frame pointer or stack pointer.
920 Do not define this macro unless there is no other way to get the
921 return address from the stack. */
923 /* #define RETURN_ADDRESS_POINTER_REGNUM */
925 /* Register in which static-chain is passed to a function. This must
926 not be a register used by the prologue. */
927 #define STATIC_CHAIN_REGNUM 7
929 /* These aren't official macros. */
930 #define PROLOGUE_TMP_REGNUM 4
931 #define RETURN_ADDR_REGNUM 14
932 /* #define GP_REGNUM 12 */
933 #define CARRY_REGNUM 17
934 #define ACCUM_REGNUM 18
935 #define M32R_MAX_INT_REGS 16
937 #ifndef SUBTARGET_GPR_P
938 #define SUBTARGET_GPR_P(REGNO) 0
941 #ifndef SUBTARGET_ACCUM_P
942 #define SUBTARGET_ACCUM_P(REGNO) 0
945 #ifndef SUBTARGET_CARRY_P
946 #define SUBTARGET_CARRY_P(REGNO) 0
949 #define GPR_P(REGNO) (IN_RANGE_P ((REGNO), 0, 15) || SUBTARGET_GPR_P (REGNO))
950 #define ACCUM_P(REGNO) ((REGNO) == ACCUM_REGNUM || SUBTARGET_ACCUM_P (REGNO))
951 #define CARRY_P(REGNO) ((REGNO) == CARRY_REGNUM || SUBTARGET_CARRY_P (REGNO))
953 /* Eliminating the frame and arg pointers. */
955 /* A C expression which is nonzero if a function must have and use a
956 frame pointer. This expression is evaluated in the reload pass.
957 If its value is nonzero the function will have a frame pointer. */
958 #define FRAME_POINTER_REQUIRED current_function_calls_alloca
961 /* C statement to store the difference between the frame pointer
962 and the stack pointer values immediately after the function prologue.
963 If `ELIMINABLE_REGS' is defined, this macro will be not be used and
964 need not be defined. */
965 #define INITIAL_FRAME_POINTER_OFFSET(VAR) \
966 ((VAR) = m32r_compute_frame_size (get_frame_size ()))
969 /* If defined, this macro specifies a table of register pairs used to
970 eliminate unneeded registers that point into the stack frame. If
971 it is not defined, the only elimination attempted by the compiler
972 is to replace references to the frame pointer with references to
975 Note that the elimination of the argument pointer with the stack
976 pointer is specified first since that is the preferred elimination. */
978 #define ELIMINABLE_REGS \
979 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
980 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
981 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }}
983 /* A C expression that returns non-zero if the compiler is allowed to
984 try to replace register number FROM-REG with register number
985 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
986 defined, and will usually be the constant 1, since most of the
987 cases preventing register elimination are things that the compiler
988 already knows about. */
990 #define CAN_ELIMINATE(FROM, TO) \
991 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
992 ? ! frame_pointer_needed \
995 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
996 specifies the initial difference between the specified pair of
997 registers. This macro must be defined if `ELIMINABLE_REGS' is
1000 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1002 int size = m32r_compute_frame_size (get_frame_size ()); \
1004 if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1006 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
1007 (OFFSET) = size - current_function_pretend_args_size; \
1008 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1009 (OFFSET) = size - current_function_pretend_args_size; \
1014 /* Function argument passing. */
1016 /* When a prototype says `char' or `short', really pass an `int'. */
1017 #define PROMOTE_PROTOTYPES 1
1019 /* If defined, the maximum amount of space required for outgoing
1020 arguments will be computed and placed into the variable
1021 `current_function_outgoing_args_size'. No space will be pushed
1022 onto the stack for each call; instead, the function prologue should
1023 increase the stack frame size by this amount. */
1024 #define ACCUMULATE_OUTGOING_ARGS 1
1026 /* Define this macro if functions should assume that stack space has
1027 been allocated for arguments even when their values are passed in
1030 The value of this macro is the size, in bytes, of the area
1031 reserved for arguments passed in registers for the function
1032 represented by FNDECL.
1034 This space can be allocated by the caller, or be a part of the
1035 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
1038 #define REG_PARM_STACK_SPACE(FNDECL) \
1039 (M32R_MAX_PARM_REGS * UNITS_PER_WORD)
1042 /* Value is the number of bytes of arguments automatically
1043 popped when returning from a subroutine call.
1044 FUNDECL is the declaration node of the function (as a tree),
1045 FUNTYPE is the data type of the function (as a tree),
1046 or for a library call it is an identifier node for the subroutine name.
1047 SIZE is the number of bytes of arguments passed on the stack. */
1048 #define RETURN_POPS_ARGS(DECL, FUNTYPE, SIZE) 0
1050 /* Nonzero if we do not know how to pass TYPE solely in registers. */
1051 #define MUST_PASS_IN_STACK(MODE, TYPE) \
1053 && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \
1054 || TREE_ADDRESSABLE (TYPE)))
1056 /* Define a data type for recording info about an argument list
1057 during the scan of that argument list. This data type should
1058 hold all necessary information about the function itself
1059 and about the args processed so far, enough to enable macros
1060 such as FUNCTION_ARG to determine where the next arg should go. */
1061 #define CUMULATIVE_ARGS int
1063 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1064 for a call to a function whose data type is FNTYPE.
1065 For a library call, FNTYPE is 0. */
1066 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
1069 /* The number of registers used for parameter passing. Local to this file. */
1070 #define M32R_MAX_PARM_REGS 4
1072 /* 1 if N is a possible register number for function argument passing. */
1073 #define FUNCTION_ARG_REGNO_P(N) \
1074 ((unsigned) (N) < M32R_MAX_PARM_REGS)
1076 /* The ROUND_ADVANCE* macros are local to this file. */
1077 /* Round SIZE up to a word boundary. */
1078 #define ROUND_ADVANCE(SIZE) \
1079 (((SIZE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1081 /* Round arg MODE/TYPE up to the next word boundary. */
1082 #define ROUND_ADVANCE_ARG(MODE, TYPE) \
1083 ((MODE) == BLKmode \
1084 ? ROUND_ADVANCE ((unsigned int) int_size_in_bytes (TYPE)) \
1085 : ROUND_ADVANCE (GET_MODE_SIZE (MODE)))
1087 /* Round CUM up to the necessary point for argument MODE/TYPE. */
1088 #define ROUND_ADVANCE_CUM(CUM, MODE, TYPE) (CUM)
1090 /* Return boolean indicating arg of type TYPE and mode MODE will be passed in
1091 a reg. This includes arguments that have to be passed by reference as the
1092 pointer to them is passed in a reg if one is available (and that is what
1094 This macro is only used in this file. */
1095 #define PASS_IN_REG_P(CUM, MODE, TYPE, NAMED) \
1096 (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) < M32R_MAX_PARM_REGS)
1098 /* Determine where to put an argument to a function.
1099 Value is zero to push the argument on the stack,
1100 or a hard register in which to store the argument.
1102 MODE is the argument's machine mode.
1103 TYPE is the data type of the argument (as a tree).
1104 This is null for libcalls where that information may
1106 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1107 the preceding args and about the function being called.
1108 NAMED is nonzero if this argument is a named parameter
1109 (otherwise it is an extra parameter matching an ellipsis). */
1110 /* On the M32R the first M32R_MAX_PARM_REGS args are normally in registers
1111 and the rest are pushed. */
1112 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1113 (PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED)) \
1114 ? gen_rtx_REG ((MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))) \
1117 /* ??? Quick hack to try to get varargs working the normal way. */
1118 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
1119 (((! current_function_varargs || (NAMED)) \
1120 && PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED))) \
1121 ? gen_rtx_REG ((MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))) \
1124 /* A C expression for the number of words, at the beginning of an
1125 argument, must be put in registers. The value must be zero for
1126 arguments that are passed entirely in registers or that are entirely
1127 pushed on the stack.
1129 On some machines, certain arguments must be passed partially in
1130 registers and partially in memory. On these machines, typically the
1131 first @var{n} words of arguments are passed in registers, and the rest
1132 on the stack. If a multi-word argument (a @code{double} or a
1133 structure) crosses that boundary, its first few words must be passed
1134 in registers and the rest must be pushed. This macro tells the
1135 compiler when this occurs, and how many of the words should go in
1137 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1138 function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED)
1140 /* A C expression that indicates when an argument must be passed by
1141 reference. If nonzero for an argument, a copy of that argument is
1142 made in memory and a pointer to the argument is passed instead of
1143 the argument itself. The pointer is passed in whatever way is
1144 appropriate for passing a pointer to that type. */
1145 /* All arguments greater than 8 bytes are passed this way. */
1146 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
1147 ((TYPE) && int_size_in_bytes (TYPE) > 8)
1149 /* Update the data in CUM to advance over an argument
1150 of mode MODE and data type TYPE.
1151 (TYPE is null for libcalls where that information may not be available.) */
1152 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1153 ((CUM) = (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) \
1154 + ROUND_ADVANCE_ARG ((MODE), (TYPE))))
1156 /* If defined, a C expression that gives the alignment boundary, in bits,
1157 of an argument with the specified mode and type. If it is not defined,
1158 PARM_BOUNDARY is used for all arguments. */
1160 /* We assume PARM_BOUNDARY == UNITS_PER_WORD here. */
1161 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
1162 (((TYPE) ? TYPE_ALIGN (TYPE) : GET_MODE_BITSIZE (MODE)) <= PARM_BOUNDARY \
1164 : 2 * PARM_BOUNDARY)
1167 /* This macro offers an alternative
1168 to using `__builtin_saveregs' and defining the macro
1169 `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
1170 arguments into the stack so that all the arguments appear to have
1171 been passed consecutively on the stack. Once this is done, you
1172 can use the standard implementation of varargs that works for
1173 machines that pass all their arguments on the stack.
1175 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure,
1176 containing the values that obtain after processing of the named
1177 arguments. The arguments MODE and TYPE describe the last named
1178 argument--its machine mode and its data type as a tree node.
1180 The macro implementation should do two things: first, push onto the
1181 stack all the argument registers *not* used for the named
1182 arguments, and second, store the size of the data thus pushed into
1183 the `int'-valued variable whose name is supplied as the argument
1184 PRETEND_SIZE. The value that you store here will serve as
1185 additional offset for setting up the stack frame.
1187 If the argument NO_RTL is nonzero, it means that the
1188 arguments of the function are being analyzed for the second time.
1189 This happens for an inline function, which is not actually
1190 compiled until the end of the source file. The macro
1191 `SETUP_INCOMING_VARARGS' should not generate any instructions in
1194 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_SIZE, NO_RTL) \
1195 m32r_setup_incoming_varargs (&ARGS_SO_FAR, MODE, TYPE, &PRETEND_SIZE, NO_RTL)
1197 /* Implement `va_arg'. */
1198 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
1199 m32r_va_arg (valist, type)
1201 /* Function results. */
1203 /* Define how to find the value returned by a function.
1204 VALTYPE is the data type of the value (as a tree).
1205 If the precise function being called is known, FUNC is its FUNCTION_DECL;
1206 otherwise, FUNC is 0. */
1207 #define FUNCTION_VALUE(VALTYPE, FUNC) gen_rtx_REG (TYPE_MODE (VALTYPE), 0)
1209 /* Define how to find the value returned by a library function
1210 assuming the value has mode MODE. */
1211 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0)
1213 /* 1 if N is a possible register number for a function value
1214 as seen by the caller. */
1215 /* ??? What about r1 in DI/DF values. */
1216 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
1218 /* A C expression which can inhibit the returning of certain function
1219 values in registers, based on the type of value. A nonzero value says
1220 to return the function value in memory, just as large structures are
1221 always returned. Here TYPE will be a C expression of type `tree',
1222 representing the data type of the value. */
1223 #define RETURN_IN_MEMORY(TYPE) \
1224 (int_size_in_bytes (TYPE) > 8)
1226 /* Tell GCC to use RETURN_IN_MEMORY. */
1227 #define DEFAULT_PCC_STRUCT_RETURN 0
1229 /* Register in which address to store a structure value
1230 is passed to a function, or 0 to use `invisible' first argument. */
1231 #define STRUCT_VALUE 0
1233 /* Function entry and exit. */
1235 /* Initialize data used by insn expanders. This is called from
1236 init_emit, once for each function, before code is generated. */
1237 #define INIT_EXPANDERS m32r_init_expanders ()
1239 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1240 the stack pointer does not matter. The value is tested only in
1241 functions that have frame pointers.
1242 No definition is equivalent to always zero. */
1243 #define EXIT_IGNORE_STACK 1
1245 /* Output assembler code to FILE to increment profiler label # LABELNO
1246 for profiling a function entry. */
1247 #define FUNCTION_PROFILER(FILE, LABELNO) abort ()
1251 /* On the M32R, the trampoline is
1258 ??? Need addr32 support.
1261 /* Length in bytes of the trampoline for entering a nested function. */
1262 #define TRAMPOLINE_SIZE 12
1264 /* Emit RTL insns to initialize the variable parts of a trampoline.
1265 FNADDR is an RTX for the address of the function's pure code.
1266 CXT is an RTX for the static chain value for the function. */
1267 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
1269 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 0)), \
1270 plus_constant ((CXT), 0xe7000000)); \
1271 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 4)), \
1272 plus_constant ((FNADDR), 0xe6000000)); \
1273 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 8)), \
1274 GEN_INT (0x1fc67000)); \
1275 emit_insn (gen_flush_icache (validize_mem (gen_rtx_MEM (SImode, TRAMP)))); \
1278 /* Library calls. */
1280 /* Generate calls to memcpy, memcmp and memset. */
1281 #define TARGET_MEM_FUNCTIONS
1283 /* Addressing modes, and classification of registers for them. */
1285 /* Maximum number of registers that can appear in a valid memory address. */
1286 #define MAX_REGS_PER_ADDRESS 1
1288 /* We have post-inc load and pre-dec,pre-inc store,
1289 but only for 4 byte vals. */
1290 #define HAVE_PRE_DECREMENT 1
1291 #define HAVE_PRE_INCREMENT 1
1292 #define HAVE_POST_INCREMENT 1
1294 /* Recognize any constant value that is a valid address. */
1295 #define CONSTANT_ADDRESS_P(X) \
1296 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
1297 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST)
1299 /* Nonzero if the constant value X is a legitimate general operand.
1300 We don't allow (plus symbol large-constant) as the relocations can't
1301 describe it. INTVAL > 32767 handles both 16 bit and 24 bit relocations.
1302 We allow all CONST_DOUBLE's as the md file patterns will force the
1303 constant to memory if they can't handle them. */
1305 #define LEGITIMATE_CONSTANT_P(X) \
1306 (! (GET_CODE (X) == CONST \
1307 && GET_CODE (XEXP (X, 0)) == PLUS \
1308 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF \
1309 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
1310 && (unsigned HOST_WIDE_INT) INTVAL (XEXP (XEXP (X, 0), 1)) > 32767))
1312 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
1313 and check its validity for a certain class.
1314 We have two alternate definitions for each of them.
1315 The usual definition accepts all pseudo regs; the other rejects
1316 them unless they have been allocated suitable hard regs.
1317 The symbol REG_OK_STRICT causes the latter definition to be used.
1319 Most source files want to accept pseudo regs in the hope that
1320 they will get allocated to the class that the insn wants them to be in.
1321 Source files for reload pass need to be strict.
1322 After reload, it makes no difference, since pseudo regs have
1323 been eliminated by then. */
1325 #ifdef REG_OK_STRICT
1327 /* Nonzero if X is a hard reg that can be used as a base reg. */
1328 #define REG_OK_FOR_BASE_P(X) GPR_P (REGNO (X))
1329 /* Nonzero if X is a hard reg that can be used as an index. */
1330 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
1334 /* Nonzero if X is a hard reg that can be used as a base reg
1335 or if it is a pseudo reg. */
1336 #define REG_OK_FOR_BASE_P(X) \
1337 (GPR_P (REGNO (X)) \
1338 || (REGNO (X)) == ARG_POINTER_REGNUM \
1339 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
1340 /* Nonzero if X is a hard reg that can be used as an index
1341 or if it is a pseudo reg. */
1342 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
1346 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
1347 that is a valid memory address for an instruction.
1348 The MODE argument is the machine mode for the MEM expression
1349 that wants to use this address. */
1351 /* Local to this file. */
1352 #define RTX_OK_FOR_BASE_P(X) (REG_P (X) && REG_OK_FOR_BASE_P (X))
1354 /* Local to this file. */
1355 #define RTX_OK_FOR_OFFSET_P(X) \
1356 (GET_CODE (X) == CONST_INT && INT16_P (INTVAL (X)))
1358 /* Local to this file. */
1359 #define LEGITIMATE_OFFSET_ADDRESS_P(MODE, X) \
1360 (GET_CODE (X) == PLUS \
1361 && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \
1362 && RTX_OK_FOR_OFFSET_P (XEXP (X, 1)))
1364 /* Local to this file. */
1365 /* For LO_SUM addresses, do not allow them if the MODE is > 1 word,
1366 since more than one instruction will be required. */
1367 #define LEGITIMATE_LO_SUM_ADDRESS_P(MODE, X) \
1368 (GET_CODE (X) == LO_SUM \
1369 && (MODE != BLKmode && GET_MODE_SIZE (MODE) <= UNITS_PER_WORD) \
1370 && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \
1371 && CONSTANT_P (XEXP (X, 1)))
1373 /* Local to this file. */
1374 /* Is this a load and increment operation. */
1375 #define LOAD_POSTINC_P(MODE, X) \
1376 (((MODE) == SImode || (MODE) == SFmode) \
1377 && GET_CODE (X) == POST_INC \
1378 && GET_CODE (XEXP (X, 0)) == REG \
1379 && RTX_OK_FOR_BASE_P (XEXP (X, 0)))
1381 /* Local to this file. */
1382 /* Is this an increment/decrement and store operation. */
1383 #define STORE_PREINC_PREDEC_P(MODE, X) \
1384 (((MODE) == SImode || (MODE) == SFmode) \
1385 && (GET_CODE (X) == PRE_INC || GET_CODE (X) == PRE_DEC) \
1386 && GET_CODE (XEXP (X, 0)) == REG \
1387 && RTX_OK_FOR_BASE_P (XEXP (X, 0)))
1389 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1390 { if (RTX_OK_FOR_BASE_P (X)) \
1392 if (LEGITIMATE_OFFSET_ADDRESS_P ((MODE), (X))) \
1394 if (LEGITIMATE_LO_SUM_ADDRESS_P ((MODE), (X))) \
1396 if (LOAD_POSTINC_P ((MODE), (X))) \
1398 if (STORE_PREINC_PREDEC_P ((MODE), (X))) \
1402 /* Try machine-dependent ways of modifying an illegitimate address
1403 to be legitimate. If we find one, return the new, valid address.
1404 This macro is used in only one place: `memory_address' in explow.c.
1406 OLDX is the address as it was before break_out_memory_refs was called.
1407 In some cases it is useful to look at this to decide what needs to be done.
1409 MODE and WIN are passed so that this macro can use
1410 GO_IF_LEGITIMATE_ADDRESS.
1412 It is always safe for this macro to do nothing. It exists to recognize
1413 opportunities to optimize the output.
1415 ??? Is there anything useful we can do here for the M32R? */
1417 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
1419 /* Go to LABEL if ADDR (a legitimate address expression)
1420 has an effect that depends on the machine mode it is used for. */
1421 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
1423 if (GET_CODE (ADDR) == PRE_DEC \
1424 || GET_CODE (ADDR) == PRE_INC \
1425 || GET_CODE (ADDR) == POST_INC \
1426 || GET_CODE (ADDR) == LO_SUM) \
1430 /* Condition code usage. */
1432 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
1433 return the mode to be used for the comparison. */
1434 #define SELECT_CC_MODE(OP, X, Y) \
1435 ((enum machine_mode)m32r_select_cc_mode ((int)OP, X, Y))
1437 /* Return non-zero if SELECT_CC_MODE will never return MODE for a
1438 floating point inequality comparison. */
1439 #define REVERSIBLE_CC_MODE(MODE) 1 /*???*/
1443 /* ??? I'm quite sure I don't understand enough of the subtleties involved
1444 in choosing the right numbers to use here, but there doesn't seem to be
1445 enough documentation on this. What I've done is define an insn to cost
1446 4 "units" and work from there. COSTS_N_INSNS (N) is defined as (N) * 4 - 2
1447 so that seems reasonable. Some values are supposed to be defined relative
1448 to each other and thus aren't necessarily related to COSTS_N_INSNS. */
1450 /* Compute the cost of computing a constant rtl expression RTX
1451 whose rtx-code is CODE. The body of this macro is a portion
1452 of a switch statement. If the code is computed here,
1453 return it with a return statement. Otherwise, break from the switch. */
1454 /* Small integers are as cheap as registers. 4 byte values can be fetched
1455 as immediate constants - let's give that the cost of an extra insn. */
1456 #define CONST_COSTS(X, CODE, OUTER_CODE) \
1458 if (INT16_P (INTVAL (X))) \
1460 /* fall through */ \
1465 case CONST_DOUBLE : \
1468 split_double (X, &high, &low); \
1469 return 4 * (!INT16_P (INTVAL (high)) \
1470 + !INT16_P (INTVAL (low))); \
1473 /* Compute the cost of an address. */
1474 #define ADDRESS_COST(ADDR) m32r_address_cost (ADDR)
1476 /* Compute extra cost of moving data between one register class
1478 #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) 2
1480 /* Compute the cost of moving data between registers and memory. */
1481 /* Memory is 3 times as expensive as registers.
1482 ??? Is that the right way to look at it? */
1483 #define MEMORY_MOVE_COST(MODE,CLASS,IN_P) \
1484 (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD ? 6 : 12)
1486 /* The cost of a branch insn. */
1487 /* A value of 2 here causes GCC to avoid using branches in comparisons like
1488 while (a < N && a). Branches aren't that expensive on the M32R so
1489 we define this as 1. Defining it as 2 had a heavy hit in fp-bit.c. */
1490 #define BRANCH_COST ((TARGET_BRANCH_COST) ? 2 : 1)
1492 /* Provide the costs of a rtl expression. This is in the body of a
1493 switch on CODE. The purpose for the cost of MULT is to encourage
1494 `synth_mult' to find a synthetic multiply when reasonable.
1496 If we need more than 12 insns to do a multiply, then go out-of-line,
1497 since the call overhead will be < 10% of the cost of the multiply. */
1498 #define RTX_COSTS(X, CODE, OUTER_CODE) \
1500 return COSTS_N_INSNS (3); \
1505 return COSTS_N_INSNS (10);
1507 /* Nonzero if access to memory by bytes is slow and undesirable.
1508 For RISC chips, it means that access to memory by bytes is no
1509 better than access by words when possible, so grab a whole word
1510 and maybe make use of that. */
1511 #define SLOW_BYTE_ACCESS 1
1513 /* Define this macro if it is as good or better to call a constant
1514 function address than to call an address kept in a register. */
1515 #define NO_FUNCTION_CSE
1517 /* Define this macro if it is as good or better for a function to call
1518 itself with an explicit address than to call an address kept in a
1520 #define NO_RECURSIVE_FUNCTION_CSE
1522 /* When the `length' insn attribute is used, this macro specifies the
1523 value to be assigned to the address of the first insn in a
1524 function. If not specified, 0 is used. */
1525 #define FIRST_INSN_ADDRESS m32r_first_insn_address ()
1528 /* Section selection. */
1530 #define TEXT_SECTION_ASM_OP "\t.section .text"
1531 #define DATA_SECTION_ASM_OP "\t.section .data"
1532 #define RODATA_SECTION_ASM_OP "\t.section .rodata"
1533 #define BSS_SECTION_ASM_OP "\t.section .bss"
1534 #define SDATA_SECTION_ASM_OP "\t.section .sdata"
1535 #define SBSS_SECTION_ASM_OP "\t.section .sbss"
1536 /* This one is for svr4.h. */
1537 #undef CONST_SECTION_ASM_OP
1538 #define CONST_SECTION_ASM_OP "\t.section .rodata"
1540 /* A list of names for sections other than the standard two, which are
1541 `in_text' and `in_data'. You need not define this macro
1542 on a system with no other sections (that GCC needs to use). */
1543 #undef EXTRA_SECTIONS
1544 #define EXTRA_SECTIONS in_sdata, in_sbss, in_const
1546 /* One or more functions to be defined in "varasm.c". These
1547 functions should do jobs analogous to those of `text_section' and
1548 `data_section', for your additional sections. Do not define this
1549 macro if you do not define `EXTRA_SECTIONS'. */
1550 #undef EXTRA_SECTION_FUNCTIONS
1551 #define EXTRA_SECTION_FUNCTIONS \
1552 CONST_SECTION_FUNCTION \
1553 SDATA_SECTION_FUNCTION \
1554 SBSS_SECTION_FUNCTION
1556 #define SDATA_SECTION_FUNCTION \
1560 if (in_section != in_sdata) \
1562 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
1563 in_section = in_sdata; \
1567 #define SBSS_SECTION_FUNCTION \
1571 if (in_section != in_sbss) \
1573 fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \
1574 in_section = in_sbss; \
1578 /* A C statement or statements to switch to the appropriate section for
1579 output of EXP. You can assume that EXP is either a `VAR_DECL' node
1580 or a constant of some sort. RELOC indicates whether the initial value
1581 of EXP requires link-time relocations. */
1582 #undef SELECT_SECTION
1583 #define SELECT_SECTION(EXP, RELOC, ALIGN) \
1584 m32r_select_section ((EXP), (RELOC))
1586 /* A C statement or statements to switch to the appropriate section for
1587 output of RTX in mode MODE. You can assume that RTX
1588 is some kind of constant in RTL. The argument MODE is redundant
1589 except in the case of a `const_int' rtx. Select the section by
1590 calling `text_section' or one of the alternatives for other
1593 Do not define this macro if you put all constants in the read-only
1596 #undef SELECT_RTX_SECTION
1598 /* Define this macro if jump tables (for tablejump insns) should be
1599 output in the text section, along with the assembler instructions.
1600 Otherwise, the readonly data section is used.
1601 This macro is irrelevant if there is no separate readonly data section. */
1602 /*#define JUMP_TABLES_IN_TEXT_SECTION*/
1604 /* Define this macro if references to a symbol must be treated
1605 differently depending on something about the variable or
1606 function named by the symbol (such as what section it is in).
1608 The macro definition, if any, is executed immediately after the
1609 rtl for DECL or other node is created.
1610 The value of the rtl will be a `mem' whose address is a
1613 The usual thing for this macro to do is to store a flag in the
1614 `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified
1615 name string in the `symbol_ref' (if one bit is not enough
1618 #define SDATA_FLAG_CHAR '@'
1619 /* Small objects are recorded with no prefix for space efficiency since
1620 they'll be the most common. This isn't the case if the user passes
1621 -mmodel={medium|large} and one could choose to not mark symbols that
1622 are the default, but that complicates things. */
1623 /*#define SMALL_FLAG_CHAR '#'*/
1624 #define MEDIUM_FLAG_CHAR '%'
1625 #define LARGE_FLAG_CHAR '&'
1627 #define SDATA_NAME_P(NAME) (*(NAME) == SDATA_FLAG_CHAR)
1628 /*#define SMALL_NAME_P(NAME) (*(NAME) == SMALL_FLAG_CHAR)*/
1629 #define SMALL_NAME_P(NAME) (! ENCODED_NAME_P (NAME) && ! LIT_NAME_P (NAME))
1630 #define MEDIUM_NAME_P(NAME) (*(NAME) == MEDIUM_FLAG_CHAR)
1631 #define LARGE_NAME_P(NAME) (*(NAME) == LARGE_FLAG_CHAR)
1632 /* For string literals, etc. */
1633 #define LIT_NAME_P(NAME) ((NAME)[0] == '*' && (NAME)[1] == '.')
1635 #define ENCODED_NAME_P(SYMBOL_NAME) \
1636 (SDATA_NAME_P (SYMBOL_NAME) \
1637 /*|| SMALL_NAME_P (SYMBOL_NAME)*/ \
1638 || MEDIUM_NAME_P (SYMBOL_NAME) \
1639 || LARGE_NAME_P (SYMBOL_NAME))
1641 #define ENCODE_SECTION_INFO(DECL, FIRST) m32r_encode_section_info (DECL, FIRST)
1643 /* Decode SYM_NAME and store the real name part in VAR, sans
1644 the characters that encode section info. Define this macro if
1645 ENCODE_SECTION_INFO alters the symbol's name string. */
1646 /* Note that we have to handle symbols like "%*start". */
1647 #define STRIP_NAME_ENCODING(VAR, SYMBOL_NAME) \
1649 (VAR) = (SYMBOL_NAME) + ENCODED_NAME_P (SYMBOL_NAME); \
1650 (VAR) += *(VAR) == '*'; \
1655 /* The register number of the register used to address a table of static
1656 data addresses in memory. In some cases this register is defined by a
1657 processor's ``application binary interface'' (ABI). When this macro
1658 is defined, RTL is generated for this register once, as with the stack
1659 pointer and frame pointer registers. If this macro is not defined, it
1660 is up to the machine-dependent files to allocate such a register (if
1662 /*#define PIC_OFFSET_TABLE_REGNUM 12*/
1664 /* Define this macro if the register defined by PIC_OFFSET_TABLE_REGNUM is
1665 clobbered by calls. Do not define this macro if PIC_OFFSET_TABLE_REGNUM
1667 /* This register is call-saved on the M32R. */
1668 /*#define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED*/
1670 /* By generating position-independent code, when two different programs (A
1671 and B) share a common library (libC.a), the text of the library can be
1672 shared whether or not the library is linked at the same address for both
1673 programs. In some of these environments, position-independent code
1674 requires not only the use of different addressing modes, but also
1675 special code to enable the use of these addressing modes.
1677 The FINALIZE_PIC macro serves as a hook to emit these special
1678 codes once the function is being compiled into assembly code, but not
1679 before. (It is not done before, because in the case of compiling an
1680 inline function, it would lead to multiple PIC prologues being
1681 included in functions which used inline functions and were compiled to
1682 assembly language.) */
1684 /*#define FINALIZE_PIC m32r_finalize_pic ()*/
1686 /* A C expression that is nonzero if X is a legitimate immediate
1687 operand on the target machine when generating position independent code.
1688 You can assume that X satisfies CONSTANT_P, so you need not
1689 check this. You can also assume `flag_pic' is true, so you need not
1690 check it either. You need not define this macro if all constants
1691 (including SYMBOL_REF) can be immediate operands when generating
1692 position independent code. */
1693 /*#define LEGITIMATE_PIC_OPERAND_P(X)*/
1695 /* Control the assembler format that we output. */
1697 /* Output at beginning of assembler file. */
1698 #define ASM_FILE_START(FILE) m32r_asm_file_start (FILE)
1700 /* A C string constant describing how to begin a comment in the target
1701 assembler language. The compiler assumes that the comment will
1702 end at the end of the line. */
1703 #define ASM_COMMENT_START ";"
1705 /* Output to assembler file text saying following lines
1706 may contain character constants, extra white space, comments, etc. */
1707 #define ASM_APP_ON ""
1709 /* Output to assembler file text saying following lines
1710 no longer contain unusual constructs. */
1711 #define ASM_APP_OFF ""
1713 /* This is how to output the definition of a user-level label named NAME,
1714 such as the label on a static function or variable NAME. */
1715 /* On the M32R we need to ensure the next instruction starts on a 32 bit
1716 boundary [the previous insn must either be 2 16 bit insns or 1 32 bit]. */
1717 #define ASM_OUTPUT_LABEL(FILE, NAME) \
1720 assemble_name (FILE, NAME); \
1721 fputs (":\n", FILE); \
1725 /* This is how to output a command to make the user-level label named NAME
1726 defined for reference from other files. */
1727 #define ASM_GLOBALIZE_LABEL(FILE, NAME) \
1730 fputs ("\t.global\t", FILE); \
1731 assemble_name (FILE, NAME); \
1732 fputs ("\n", FILE); \
1736 /* This is how to output a reference to a user-level label named NAME.
1737 `assemble_name' uses this. */
1738 #undef ASM_OUTPUT_LABELREF
1739 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
1742 const char * real_name; \
1743 STRIP_NAME_ENCODING (real_name, (NAME)); \
1744 asm_fprintf (FILE, "%U%s", real_name); \
1748 /* If -Os, don't force line number labels to begin at the beginning of
1749 the word; we still want the assembler to try to put things in parallel,
1750 should that be possible.
1751 For m32r/d, instructions are never in parallel (other than with a nop)
1752 and the simulator and stub both handle a breakpoint in the middle of
1753 a word so don't ever force line number labels to begin at the beginning
1756 #undef ASM_OUTPUT_SOURCE_LINE
1757 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
1760 static int sym_lineno = 1; \
1761 fprintf (file, ".stabn 68,0,%d,.LM%d-", \
1762 line, sym_lineno); \
1764 (file, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
1765 fprintf (file, (optimize_size || TARGET_M32R) \
1766 ? "\n\t.debugsym .LM%d\n" \
1773 /* Store in OUTPUT a string (made with alloca) containing
1774 an assembler-name for a local static variable named NAME.
1775 LABELNO is an integer which is different for each call. */
1776 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1779 (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10);\
1780 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)); \
1784 /* How to refer to registers in assembler output.
1785 This sequence is indexed by compiler's hard-register-number (see above). */
1786 #ifndef SUBTARGET_REGISTER_NAMES
1787 #define SUBTARGET_REGISTER_NAMES
1790 #define REGISTER_NAMES \
1792 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
1793 "r8", "r9", "r10", "r11", "r12", "fp", "lr", "sp", \
1794 "ap", "cbit", "a0" \
1795 SUBTARGET_REGISTER_NAMES \
1798 /* If defined, a C initializer for an array of structures containing
1799 a name and a register number. This macro defines additional names
1800 for hard registers, thus allowing the `asm' option in declarations
1801 to refer to registers using alternate names. */
1802 #ifndef SUBTARGET_ADDITIONAL_REGISTER_NAMES
1803 #define SUBTARGET_ADDITIONAL_REGISTER_NAMES
1806 #define ADDITIONAL_REGISTER_NAMES \
1808 /*{ "gp", GP_REGNUM },*/ \
1809 { "r13", FRAME_POINTER_REGNUM }, \
1810 { "r14", RETURN_ADDR_REGNUM }, \
1811 { "r15", STACK_POINTER_REGNUM }, \
1812 SUBTARGET_ADDITIONAL_REGISTER_NAMES \
1815 /* A C expression which evaluates to true if CODE is a valid
1816 punctuation character for use in the `PRINT_OPERAND' macro. */
1817 extern char m32r_punct_chars[256];
1818 #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
1819 m32r_punct_chars[(unsigned char) (CHAR)]
1821 /* Print operand X (an rtx) in assembler syntax to file FILE.
1822 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
1823 For `%' followed by punctuation, CODE is the punctuation and X is null. */
1824 #define PRINT_OPERAND(FILE, X, CODE) \
1825 m32r_print_operand (FILE, X, CODE)
1827 /* A C compound statement to output to stdio stream STREAM the
1828 assembler syntax for an instruction operand that is a memory
1829 reference whose address is ADDR. ADDR is an RTL expression.
1831 On some machines, the syntax for a symbolic address depends on
1832 the section that the address refers to. On these machines,
1833 define the macro `ENCODE_SECTION_INFO' to store the information
1834 into the `symbol_ref', and then check for it here. */
1835 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
1836 m32r_print_operand_address (FILE, ADDR)
1838 /* If defined, C string expressions to be used for the `%R', `%L',
1839 `%U', and `%I' options of `asm_fprintf' (see `final.c'). These
1840 are useful when a single `md' file must support multiple assembler
1841 formats. In that case, the various `tm.h' files can define these
1842 macros differently. */
1843 #define REGISTER_PREFIX ""
1844 #define LOCAL_LABEL_PREFIX ".L"
1845 #define USER_LABEL_PREFIX ""
1846 #define IMMEDIATE_PREFIX "#"
1848 /* This is how to output an element of a case-vector that is absolute. */
1849 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1853 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \
1854 fprintf (FILE, "\t.word\t"); \
1855 assemble_name (FILE, label); \
1856 fprintf (FILE, "\n"); \
1860 /* This is how to output an element of a case-vector that is relative. */
1861 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)\
1865 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \
1866 fprintf (FILE, "\t.word\t"); \
1867 assemble_name (FILE, label); \
1868 fprintf (FILE, "-"); \
1869 ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \
1870 assemble_name (FILE, label); \
1871 fprintf (FILE, ")\n"); \
1875 /* The desired alignment for the location counter at the beginning
1877 /* On the M32R, align loops to 32 byte boundaries (cache line size)
1878 if -malign-loops. */
1879 #define LOOP_ALIGN(LABEL) (TARGET_ALIGN_LOOPS ? 5 : 0)
1881 /* Define this to be the maximum number of insns to move around when moving
1882 a loop test from the top of a loop to the bottom
1883 and seeing whether to duplicate it. The default is thirty.
1885 Loop unrolling currently doesn't like this optimization, so
1886 disable doing if we are unrolling loops and saving space. */
1887 #define LOOP_TEST_THRESHOLD (optimize_size \
1888 && !flag_unroll_loops \
1889 && !flag_unroll_all_loops ? 2 : 30)
1891 /* This is how to output an assembler line
1892 that says to advance the location counter
1893 to a multiple of 2**LOG bytes. */
1894 /* .balign is used to avoid confusion. */
1895 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
1899 fprintf (FILE, "\t.balign %d\n", 1 << (LOG)); \
1903 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a
1904 separate, explicit argument. If you define this macro, it is used in
1905 place of `ASM_OUTPUT_COMMON', and gives you more flexibility in
1906 handling the required alignment of the variable. The alignment is
1907 specified as the number of bits. */
1909 #define SCOMMON_ASM_OP "\t.scomm\t"
1911 #undef ASM_OUTPUT_ALIGNED_COMMON
1912 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
1915 if (! TARGET_SDATA_NONE \
1916 && (SIZE) > 0 && (SIZE) <= g_switch_value) \
1917 fprintf ((FILE), "%s", SCOMMON_ASM_OP); \
1919 fprintf ((FILE), "%s", COMMON_ASM_OP); \
1920 assemble_name ((FILE), (NAME)); \
1921 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
1925 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
1926 separate, explicit argument. If you define this macro, it is used in
1927 place of `ASM_OUTPUT_BSS', and gives you more flexibility in
1928 handling the required alignment of the variable. The alignment is
1929 specified as the number of bits.
1931 For the M32R we need sbss support. */
1933 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1936 ASM_GLOBALIZE_LABEL (FILE, NAME); \
1937 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
1941 /* Debugging information. */
1943 /* Generate DBX and DWARF debugging information. */
1944 #undef DBX_DEBUGGING_INFO
1945 #undef DWARF_DEBUGGING_INFO
1946 #undef DWARF2_DEBUGGING_INFO
1948 #define DBX_DEBUGGING_INFO
1949 #define DWARF_DEBUGGING_INFO
1950 #define DWARF2_DEBUGGING_INFO
1952 /* Prefer STABS (for now). */
1953 #undef PREFERRED_DEBUGGING_TYPE
1954 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
1956 /* Turn off splitting of long stabs. */
1957 #define DBX_CONTIN_LENGTH 0
1959 /* Miscellaneous. */
1961 /* Specify the machine mode that this machine uses
1962 for the index in the tablejump instruction. */
1963 #define CASE_VECTOR_MODE Pmode
1965 /* Define as C expression which evaluates to nonzero if the tablejump
1966 instruction expects the table to contain offsets from the address of the
1968 Do not define this if the table should contain absolute addresses. */
1969 /* It's not clear what PIC will look like or whether we want to use -fpic
1970 for the embedded form currently being talked about. For now require -fpic
1971 to get pc relative switch tables. */
1972 /*#define CASE_VECTOR_PC_RELATIVE 1 */
1974 /* Define if operations between registers always perform the operation
1975 on the full register even if a narrower mode is specified. */
1976 #define WORD_REGISTER_OPERATIONS
1978 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
1979 will either zero-extend or sign-extend. The value of this macro should
1980 be the code that says which one of the two operations is implicitly
1981 done, NIL if none. */
1982 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
1984 /* Max number of bytes we can move from memory to memory
1985 in one reasonably fast instruction. */
1988 /* Define this to be nonzero if shift instructions ignore all but the low-order
1990 #define SHIFT_COUNT_TRUNCATED 1
1992 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1993 is done just by pretending it is already truncated. */
1994 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1996 /* We assume that the store-condition-codes instructions store 0 for false
1997 and some other value for true. This is the value stored for true. */
1998 #define STORE_FLAG_VALUE 1
2000 /* Specify the machine mode that pointers have.
2001 After generation of rtl, the compiler makes no further distinction
2002 between pointers and any other objects of this machine mode. */
2003 /* ??? The M32R doesn't have full 32 bit pointers, but making this PSImode has
2004 it's own problems (you have to add extendpsisi2 and truncsipsi2).
2006 #define Pmode SImode
2008 /* A function address in a call instruction. */
2009 #define FUNCTION_MODE SImode
2011 /* Define the information needed to generate branch and scc insns. This is
2012 stored from the compare operation. Note that we can't use "rtx" here
2013 since it hasn't been defined! */
2014 extern struct rtx_def * m32r_compare_op0;
2015 extern struct rtx_def * m32r_compare_op1;
2017 /* M32R function types. */
2018 enum m32r_function_type
2020 M32R_FUNCTION_UNKNOWN, M32R_FUNCTION_NORMAL, M32R_FUNCTION_INTERRUPT
2023 #define M32R_INTERRUPT_P(TYPE) ((TYPE) == M32R_FUNCTION_INTERRUPT)
2025 /* Define this if you have defined special-purpose predicates in the
2026 file `MACHINE.c'. This macro is called within an initializer of an
2027 array of structures. The first field in the structure is the name
2028 of a predicate and the second field is an array of rtl codes. For
2029 each predicate, list all rtl codes that can be in expressions
2030 matched by the predicate. The list should have a trailing comma. */
2032 #define PREDICATE_CODES \
2033 { "reg_or_zero_operand", { REG, SUBREG, CONST_INT }}, \
2034 { "conditional_move_operand", { REG, SUBREG, CONST_INT }}, \
2035 { "carry_compare_operand", { EQ, NE }}, \
2036 { "eqne_comparison_operator", { EQ, NE }}, \
2037 { "signed_comparison_operator", { EQ, NE, LT, LE, GT, GE }}, \
2038 { "move_dest_operand", { REG, SUBREG, MEM }}, \
2039 { "move_src_operand", { REG, SUBREG, MEM, CONST_INT, \
2040 CONST_DOUBLE, LABEL_REF, CONST, \
2042 { "move_double_src_operand", { REG, SUBREG, MEM, CONST_INT, \
2044 { "two_insn_const_operand", { CONST_INT }}, \
2045 { "symbolic_operand", { SYMBOL_REF, LABEL_REF, CONST }}, \
2046 { "seth_add3_operand", { SYMBOL_REF, LABEL_REF, CONST }}, \
2047 { "int8_operand", { CONST_INT }}, \
2048 { "uint16_operand", { CONST_INT }}, \
2049 { "reg_or_int16_operand", { REG, SUBREG, CONST_INT }}, \
2050 { "reg_or_uint16_operand", { REG, SUBREG, CONST_INT }}, \
2051 { "reg_or_cmp_int16_operand", { REG, SUBREG, CONST_INT }}, \
2052 { "reg_or_eq_int16_operand", { REG, SUBREG, CONST_INT }}, \
2053 { "cmp_int16_operand", { CONST_INT }}, \
2054 { "call_address_operand", { SYMBOL_REF, LABEL_REF, CONST }}, \
2055 { "extend_operand", { REG, SUBREG, MEM }}, \
2056 { "small_insn_p", { INSN, CALL_INSN, JUMP_INSN }}, \
2057 { "m32r_block_immediate_operand",{ CONST_INT }}, \
2058 { "large_insn_p", { INSN, CALL_INSN, JUMP_INSN }}, \
2059 { "seth_add3_operand", { SYMBOL_REF, LABEL_REF, CONST }},
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