1 /* Definitions of target machine for Mitsubishi D30V.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Solutions.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 /* D30V specific macros */
27 /* Align an address */
28 #define D30V_ALIGN(addr,align) (((addr) + (align) - 1) & ~((align) - 1))
31 /* Driver configuration */
33 /* Defined in svr4.h. */
34 /* #define SWITCH_TAKES_ARG(CHAR) */
36 /* Defined in svr4.h. */
37 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
39 /* Defined in svr4.h. */
42 %{!mno-asm-optimize: %{O*: %{!O0: -O} %{O0: %{masm-optimize: -O}}}} \
43 %{v} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
45 /* Defined in svr4.h. */
46 /* #define ASM_FINAL_SPEC "" */
48 /* Defined in svr4.h. */
53 %{static:-dn -Bstatic} \
54 %{shared:-G -dy -z text} \
55 %{symbolic:-Bsymbolic -G -dy -z text} \
59 %{mextmem: -m d30v_e} %{mextmemory: -m d30v_e} %{monchip: -m d30v_o}"
61 /* Defined in svr4.h. */
63 #define LIB_SPEC "--start-group -lsim -lc --end-group"
65 /* Defined in svr4.h. */
67 #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s"
69 /* Defined in svr4.h. */
71 #define ENDFILE_SPEC "crtend%O%s"
73 /* Defined in svr4.h for host compilers. */
74 /* #define MD_EXEC_PREFIX "" */
76 /* Defined in svr4.h for host compilers. */
77 /* #define MD_STARTFILE_PREFIX "" */
80 /* Run-time target specifications */
82 #define TARGET_CPU_CPP_BUILTINS() \
85 builtin_define ("__D30V__"); \
86 builtin_assert ("machine=d30v"); \
90 /* This declaration should be present. */
91 extern int target_flags;
93 #define MASK_NO_COND_MOVE 0x00000001 /* disable conditional moves */
95 #define MASK_DEBUG_ARG 0x10000000 /* debug argument handling */
96 #define MASK_DEBUG_STACK 0x20000000 /* debug stack allocations */
97 #define MASK_DEBUG_ADDR 0x40000000 /* debug GO_IF_LEGITIMATE_ADDRESS */
99 #define TARGET_NO_COND_MOVE (target_flags & MASK_NO_COND_MOVE)
100 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
101 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK)
102 #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR)
104 #define TARGET_COND_MOVE (! TARGET_NO_COND_MOVE)
106 /* Default switches used. */
107 #ifndef TARGET_DEFAULT
108 #define TARGET_DEFAULT 0
111 #define TARGET_SWITCHES \
113 { "cond-move", -MASK_NO_COND_MOVE, \
114 N_("Enable use of conditional move instructions") }, \
116 { "no-cond-move", MASK_NO_COND_MOVE, \
117 N_("Disable use of conditional move instructions") }, \
119 { "debug-arg", MASK_DEBUG_ARG, \
120 N_("Debug argument support in compiler") }, \
122 { "debug-stack", MASK_DEBUG_STACK, \
123 N_("Debug stack support in compiler") }, \
125 { "debug-addr", MASK_DEBUG_ADDR, \
126 N_("Debug memory address support in compiler") }, \
128 { "asm-optimize", 0, \
129 N_("Make adjacent short instructions parallel if possible") }, \
131 { "no-asm-optimize", 0, \
132 N_("Do not make adjacent short instructions parallel") }, \
135 N_("Link programs/data to be in external memory by default") }, \
138 N_("Link programs/data to be in external memory by default") }, \
141 N_("Link programs/data to be in onchip memory by default") }, \
143 { "", TARGET_DEFAULT, "" }, \
146 #define TARGET_OPTIONS \
148 {"branch-cost=", &d30v_branch_cost_string, \
149 N_("Change the branch costs within the compiler") }, \
151 {"cond-exec=", &d30v_cond_exec_string, \
152 N_("Change the threshold for conversion to conditional execution") }, \
155 #define TARGET_VERSION fprintf (stderr, " d30v")
157 #define OVERRIDE_OPTIONS override_options ()
159 #define CAN_DEBUG_WITHOUT_FP
164 #define BITS_BIG_ENDIAN 1
166 #define BYTES_BIG_ENDIAN 1
168 #define WORDS_BIG_ENDIAN 1
170 #define UNITS_PER_WORD 4
172 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
174 if (GET_MODE_CLASS (MODE) == MODE_INT \
175 && GET_MODE_SIZE (MODE) < 4) \
179 #define PARM_BOUNDARY 32
181 #define STACK_BOUNDARY 64
183 #define FUNCTION_BOUNDARY 64
185 #define BIGGEST_ALIGNMENT 64
187 /* Defined in svr4.h. */
188 /* #define MAX_OFILE_ALIGNMENT */
190 #define DATA_ALIGNMENT(TYPE, ALIGN) \
191 (TREE_CODE (TYPE) == ARRAY_TYPE \
192 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
193 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
195 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
196 (TREE_CODE (EXP) == STRING_CST \
197 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
199 #define STRICT_ALIGNMENT 1
201 /* Defined in svr4.h. */
203 #define PCC_BITFIELD_TYPE_MATTERS 1
205 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
208 /* Layout of Source Language Data Types */
210 #define INT_TYPE_SIZE 32
212 #define SHORT_TYPE_SIZE 16
214 #define LONG_TYPE_SIZE 32
216 #define LONG_LONG_TYPE_SIZE 64
218 #define FLOAT_TYPE_SIZE 32
220 #define DOUBLE_TYPE_SIZE 64
222 #define LONG_DOUBLE_TYPE_SIZE 64
224 #define DEFAULT_SIGNED_CHAR 1
226 /* Defined in svr4.h. */
227 /* #define SIZE_TYPE */
229 /* Defined in svr4.h. */
230 /* #define PTRDIFF_TYPE */
232 /* Defined in svr4.h. */
233 /* #define WCHAR_TYPE */
235 /* Defined in svr4.h. */
236 /* #define WCHAR_TYPE_SIZE */
239 /* D30V register layout. */
241 /* Return true if a value is inside a range */
242 #define IN_RANGE_P(VALUE, LOW, HIGH) \
243 (((unsigned)((VALUE) - (LOW))) <= ((unsigned)((HIGH) - (LOW))))
245 /* General purpose registers. */
246 #define GPR_FIRST 0 /* First gpr */
247 #define GPR_LAST (GPR_FIRST + 63) /* Last gpr */
248 #define GPR_R0 GPR_FIRST /* R0, constant 0 */
249 #define GPR_ARG_FIRST (GPR_FIRST + 2) /* R2, first argument reg */
250 #define GPR_ARG_LAST (GPR_FIRST + 17) /* R17, last argument reg */
251 #define GPR_RET_VALUE GPR_ARG_FIRST /* R2, function return reg */
252 #define GPR_ATMP_FIRST (GPR_FIRST + 20) /* R20, tmp to save accs */
253 #define GPR_ATMP_LAST (GPR_FIRST + 21) /* R21, tmp to save accs */
254 #define GPR_STACK_TMP (GPR_FIRST + 22) /* R22, tmp for saving stack */
255 #define GPR_RES_FIRST (GPR_FIRST + 32) /* R32, first reserved reg */
256 #define GPR_RES_LAST (GPR_FIRST + 35) /* R35, last reserved reg */
257 #define GPR_FP (GPR_FIRST + 61) /* Frame pointer */
258 #define GPR_LINK (GPR_FIRST + 62) /* Return address register */
259 #define GPR_SP (GPR_FIRST + 63) /* Stack pointer */
261 /* Argument register that is eliminated in favor of the frame and/or stack
262 pointer. Also add register to point to where the return address is
264 #define SPECIAL_REG_FIRST (GPR_LAST + 1)
265 #define SPECIAL_REG_LAST (SPECIAL_REG_FIRST)
266 #define ARG_POINTER_REGNUM (SPECIAL_REG_FIRST + 0)
267 #define SPECIAL_REG_P(R) ((R) == SPECIAL_REG_FIRST)
269 #define GPR_OR_SPECIAL_REG_P(R) IN_RANGE_P (R, GPR_FIRST, SPECIAL_REG_LAST)
270 #define GPR_P(R) IN_RANGE_P (R, GPR_FIRST, GPR_LAST)
271 #define GPR_OR_PSEUDO_P(R) (GPR_OR_SPECIAL_REG_P (R) \
272 || (R) >= FIRST_PSEUDO_REGISTER)
275 #define FLAG_FIRST (SPECIAL_REG_LAST + 1) /* First flag */
276 #define FLAG_LAST (FLAG_FIRST + 7) /* Last flag */
277 #define FLAG_F0 (FLAG_FIRST) /* F0, used in prediction */
278 #define FLAG_F1 (FLAG_FIRST + 1) /* F1, used in prediction */
279 #define FLAG_F2 (FLAG_FIRST + 2) /* F2, general flag */
280 #define FLAG_F3 (FLAG_FIRST + 3) /* F3, general flag */
281 #define FLAG_SAT (FLAG_FIRST + 4) /* F4, saturation flag */
282 #define FLAG_OVERFLOW (FLAG_FIRST + 5) /* F5, overflow flag */
283 #define FLAG_ACC_OVER (FLAG_FIRST + 6) /* F6, accumulated overflow */
284 #define FLAG_CARRY (FLAG_FIRST + 7) /* F7, carry/borrow flag */
285 #define FLAG_BORROW FLAG_CARRY
287 #define FLAG_P(R) IN_RANGE_P (R, FLAG_FIRST, FLAG_LAST)
288 #define FLAG_OR_PSEUDO_P(R) (FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
290 #define BR_FLAG_P(R) IN_RANGE_P (R, FLAG_F0, FLAG_F1)
291 #define BR_FLAG_OR_PSEUDO_P(R) (BR_FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
294 #define ACCUM_FIRST (FLAG_LAST + 1) /* First accumulator */
295 #define ACCUM_A0 ACCUM_FIRST /* Register A0 */
296 #define ACCUM_A1 (ACCUM_FIRST + 1) /* Register A1 */
297 #define ACCUM_LAST (ACCUM_FIRST + 1) /* Last accumulator */
299 #define ACCUM_P(R) IN_RANGE_P (R, ACCUM_FIRST, ACCUM_LAST)
300 #define ACCUM_OR_PSEUDO_P(R) (ACCUM_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
302 /* Special registers. Note, we only define the registers that can actually
304 #define CR_FIRST (ACCUM_LAST + 1) /* First CR */
305 #define CR_LAST (CR_FIRST + 14) /* Last CR */
306 #define CR_PSW (CR_FIRST + 0) /* CR0, Program status word */
307 #define CR_BPSW (CR_FIRST + 1) /* CR1, Backup PSW */
308 #define CR_PC (CR_FIRST + 2) /* CR2, Program counter */
309 #define CR_BPC (CR_FIRST + 3) /* CR3, Backup PC */
310 #define CR_DPSW (CR_FIRST + 4) /* CR4, Debug PSW */
311 #define CR_DPC (CR_FIRST + 5) /* CR5, Debug PC */
312 #define CR_RPT_C (CR_FIRST + 6) /* CR7, loop count register */
313 #define CR_RPT_S (CR_FIRST + 7) /* CR8, loop start address */
314 #define CR_RPT_E (CR_FIRST + 8) /* CR9, loop end address */
315 #define CR_MOD_S (CR_FIRST + 9) /* CR10, modulo address start*/
316 #define CR_MOD_E (CR_FIRST + 10) /* CR11, modulo address */
317 #define CR_IBA (CR_FIRST + 11) /* CR14, Interrupt break addr */
318 #define CR_EIT_VB (CR_FIRST + 12) /* CR15, EIT vector address */
319 #define CR_INT_S (CR_FIRST + 13) /* CR16, Interrupt status */
320 #define CR_INT_M (CR_FIRST + 14) /* CR17, Interrupt mask */
322 #define CR_P(R) IN_RANGE_P (R, CR_FIRST, CR_LAST)
323 #define CR_OR_PSEUDO_P(R) (CR_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
326 /* Register Basics */
328 /* Number of hardware registers known to the compiler. They receive numbers 0
329 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
330 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
331 #define FIRST_PSEUDO_REGISTER (CR_LAST + 1)
333 /* An initializer that says which registers are used for fixed purposes all
334 throughout the compiled code and are therefore not available for general
335 allocation. These would include the stack pointer, the frame pointer
336 (except on machines where that can be used as a general register when no
337 frame pointer is needed), the program counter on machines where that is
338 considered one of the addressable registers, and any other numbered register
341 This information is expressed as a sequence of numbers, separated by commas
342 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
345 The table initialized from this macro, and the table initialized by the
346 following one, may be overridden at run time either automatically, by the
347 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
348 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
349 #define FIXED_REGISTERS \
351 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R15 */ \
352 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
353 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
354 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
356 0, 0, 0, 0, 1, 1, 1, 1, /* F0 - F7 */ \
357 0, 0, /* A0 - A1 */ \
358 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
361 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
362 general) by function calls as well as for fixed registers. This macro
363 therefore identifies the registers that are not available for general
364 allocation of values that must live across function calls.
366 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
367 saves it on function entry and restores it on function exit, if the register
368 is used within the function. */
369 #define CALL_USED_REGISTERS \
371 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R15 */ \
372 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
373 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
374 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
376 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - F7 */ \
377 1, 0, /* A0 - A1 */ \
378 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
381 /* Zero or more C statements that may conditionally modify two variables
382 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
383 been initialized from the two preceding macros.
385 This is necessary in case the fixed or call-clobbered registers depend on
388 You need not define this macro if it has no work to do.
390 If the usage of an entire class of registers depends on the target flags,
391 you may indicate this to GCC by using this macro to modify `fixed_regs' and
392 `call_used_regs' to 1 for each of the registers in the classes which should
393 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
394 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
396 (However, if this class is not included in `GENERAL_REGS' and all of the
397 insn patterns whose constraints permit this class are controlled by target
398 switches, then GCC will automatically avoid using these registers when the
399 target switches are opposed to them.) */
400 /* #define CONDITIONAL_REGISTER_USAGE */
402 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
403 related functions fail to save the registers, or that `longjmp' fails to
404 restore them. To compensate, the compiler avoids putting variables in
405 registers in functions that use `setjmp'. */
406 /* #define NON_SAVING_SETJMP */
408 /* Define this macro if the target machine has register windows. This C
409 expression returns the register number as seen by the called function
410 corresponding to the register number OUT as seen by the calling function.
411 Return OUT if register number OUT is not an outbound register. */
412 /* #define INCOMING_REGNO(OUT) */
414 /* Define this macro if the target machine has register windows. This C
415 expression returns the register number as seen by the calling function
416 corresponding to the register number IN as seen by the called function.
417 Return IN if register number IN is not an inbound register. */
418 /* #define OUTGOING_REGNO(IN) */
421 /* Order of allocation of registers */
423 /* If defined, an initializer for a vector of integers, containing the numbers
424 of hard registers in the order in which GNU CC should prefer to use them
425 (from most preferred to least).
427 If this macro is not defined, registers are used lowest numbered first (all
430 One use of this macro is on machines where the highest numbered registers
431 must always be saved and the save-multiple-registers instruction supports
432 only sequences of consecutive registers. On such machines, define
433 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
434 allocatable register first. */
436 #define REG_ALLOC_ORDER \
438 /* volatile registers */ \
439 GPR_FIRST + 2, GPR_FIRST + 3, GPR_FIRST + 4, GPR_FIRST + 5, \
440 GPR_FIRST + 6, GPR_FIRST + 7, GPR_FIRST + 8, GPR_FIRST + 9, \
441 GPR_FIRST + 10, GPR_FIRST + 11, GPR_FIRST + 12, GPR_FIRST + 13, \
442 GPR_FIRST + 14, GPR_FIRST + 15, GPR_FIRST + 16, GPR_FIRST + 17, \
443 GPR_FIRST + 18, GPR_FIRST + 19, GPR_FIRST + 20, GPR_FIRST + 21, \
444 GPR_FIRST + 22, GPR_FIRST + 23, GPR_FIRST + 24, GPR_FIRST + 25, \
447 /* saved registers */ \
448 GPR_FIRST + 34, GPR_FIRST + 35, GPR_FIRST + 36, GPR_FIRST + 37, \
449 GPR_FIRST + 38, GPR_FIRST + 39, GPR_FIRST + 40, GPR_FIRST + 41, \
450 GPR_FIRST + 42, GPR_FIRST + 43, GPR_FIRST + 44, GPR_FIRST + 45, \
451 GPR_FIRST + 46, GPR_FIRST + 47, GPR_FIRST + 48, GPR_FIRST + 49, \
452 GPR_FIRST + 50, GPR_FIRST + 51, GPR_FIRST + 52, GPR_FIRST + 53, \
453 GPR_FIRST + 54, GPR_FIRST + 55, GPR_FIRST + 56, GPR_FIRST + 57, \
454 GPR_FIRST + 58, GPR_FIRST + 59, GPR_FIRST + 60, GPR_FIRST + 61, \
458 FLAG_F2, FLAG_F3, FLAG_F0, FLAG_F1, \
459 FLAG_SAT, FLAG_OVERFLOW, FLAG_ACC_OVER, FLAG_CARRY, \
462 ACCUM_FIRST + 0, ACCUM_FIRST + 1, \
464 /* fixed registers */ \
465 GPR_FIRST + 0, GPR_FIRST + 26, GPR_FIRST + 27, GPR_FIRST + 28, \
466 GPR_FIRST + 29, GPR_FIRST + 30, GPR_FIRST + 31, GPR_FIRST + 32, \
467 GPR_FIRST + 33, GPR_FIRST + 63, \
468 CR_PSW, CR_BPSW, CR_PC, CR_BPC, \
469 CR_DPSW, CR_DPC, CR_RPT_C, CR_RPT_S, \
470 CR_RPT_E, CR_MOD_S, CR_MOD_E, CR_IBA, \
471 CR_EIT_VB, CR_INT_S, CR_INT_M, \
472 ARG_POINTER_REGNUM, \
475 /* A C statement (sans semicolon) to choose the order in which to allocate hard
476 registers for pseudo-registers local to a basic block.
478 Store the desired register order in the array `reg_alloc_order'. Element 0
479 should be the register to allocate first; element 1, the next register; and
482 The macro body should not assume anything about the contents of
483 `reg_alloc_order' before execution of the macro.
485 On most machines, it is not necessary to define this macro. */
486 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
489 /* How Values Fit in Registers */
491 /* A C expression for the number of consecutive hard registers, starting at
492 register number REGNO, required to hold a value of mode MODE.
494 On a machine where all registers are exactly one word, a suitable definition
497 #define HARD_REGNO_NREGS(REGNO, MODE) \
498 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
499 / UNITS_PER_WORD)) */
501 #define HARD_REGNO_NREGS(REGNO, MODE) \
502 (ACCUM_P (REGNO) ? ((GET_MODE_SIZE (MODE) + 2*UNITS_PER_WORD - 1) \
503 / (2*UNITS_PER_WORD)) \
504 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
507 /* A C expression that is nonzero if it is permissible to store a value of mode
508 MODE in hard register number REGNO (or in several registers starting with
509 that one). For a machine where all registers are equivalent, a suitable
512 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
514 It is not necessary for this macro to check for the numbers of fixed
515 registers, because the allocation mechanism considers them to be always
518 On some machines, double-precision values must be kept in even/odd register
519 pairs. The way to implement that is to define this macro to reject odd
520 register numbers for such modes.
522 The minimum requirement for a mode to be OK in a register is that the
523 `movMODE' instruction pattern support moves between the register and any
524 other hard register for which the mode is OK; and that moving a value into
525 the register and back out not alter it.
527 Since the same instruction used to move `SImode' will work for all narrower
528 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
529 to distinguish between these modes, provided you define patterns `movhi',
530 etc., to take advantage of this. This is useful because of the interaction
531 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
532 all integer modes to be tieable.
534 Many machines have special registers for floating point arithmetic. Often
535 people assume that floating point machine modes are allowed only in floating
536 point registers. This is not true. Any registers that can hold integers
537 can safely *hold* a floating point machine mode, whether or not floating
538 arithmetic can be done on it in those registers. Integer move instructions
539 can be used to move the values.
541 On some machines, though, the converse is true: fixed-point machine modes
542 may not go in floating registers. This is true if the floating registers
543 normalize any value stored in them, because storing a non-floating value
544 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
545 fixed-point machine modes in floating registers. But if the floating
546 registers do not automatically normalize, if you can store any bit pattern
547 in one and retrieve it unchanged without a trap, then any machine mode may
548 go in a floating register, so you can define this macro to say so.
550 The primary significance of special floating registers is rather that they
551 are the registers acceptable in floating point arithmetic instructions.
552 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
553 writing the proper constraints for those instructions.
555 On some machines, the floating registers are especially slow to access, so
556 that it is better to store a value in a stack frame than in such a register
557 if floating point arithmetic is not being done. As long as the floating
558 registers are not in class `GENERAL_REGS', they will not be used unless some
559 pattern's constraint asks for one. */
561 extern unsigned char hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
562 #define HARD_REGNO_MODE_OK(REGNO, MODE) hard_regno_mode_ok[ (int)MODE ][ REGNO ]
564 /* A C expression that is nonzero if it is desirable to choose register
565 allocation so as to avoid move instructions between a value of mode MODE1
566 and a value of mode MODE2.
568 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
569 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
572 extern unsigned char modes_tieable_p[];
573 #define MODES_TIEABLE_P(MODE1, MODE2) \
574 modes_tieable_p[ (((int)(MODE1)) * (NUM_MACHINE_MODES)) + (int)(MODE2) ]
576 /* Define this macro if the compiler should avoid copies to/from CCmode
577 registers. You should only define this macro if support fo copying to/from
578 CCmode is incomplete. */
580 /* On the D30V, copying to/from CCmode is complete, but since there are only
581 two CC registers usable for conditional tests, this helps gcse not compound
582 the reload problem. */
583 #define AVOID_CCMODE_COPIES
586 /* Handling Leaf Functions */
588 /* A C initializer for a vector, indexed by hard register number, which
589 contains 1 for a register that is allowable in a candidate for leaf function
592 If leaf function treatment involves renumbering the registers, then the
593 registers marked here should be the ones before renumbering--those that GNU
594 CC would ordinarily allocate. The registers which will actually be used in
595 the assembler code, after renumbering, should not be marked with 1 in this
598 Define this macro only if the target machine offers a way to optimize the
599 treatment of leaf functions. */
600 /* #define LEAF_REGISTERS */
602 /* A C expression whose value is the register number to which REGNO should be
603 renumbered, when a function is treated as a leaf function.
605 If REGNO is a register number which should not appear in a leaf function
606 before renumbering, then the expression should yield -1, which will cause
607 the compiler to abort.
609 Define this macro only if the target machine offers a way to optimize the
610 treatment of leaf functions, and registers need to be renumbered to do this. */
611 /* #define LEAF_REG_REMAP(REGNO) */
614 /* Register Classes */
616 /* An enumeral type that must be defined with all the register class names as
617 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
618 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
619 which is not a register class but rather tells how many classes there are.
621 Each register class has a number, which is the value of casting the class
622 name to type `int'. The number serves as an index in many of the tables
641 #define GENERAL_REGS GPR_REGS
643 /* The number of distinct register classes, defined as follows:
645 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
646 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
648 /* An initializer containing the names of the register classes as C string
649 constants. These names are used in writing some of the debugging dumps. */
650 #define REG_CLASS_NAMES \
666 /* Create mask bits for 3rd word of REG_CLASS_CONTENTS */
667 #define MASK_WORD3(REG) ((long)1 << ((REG) - 64))
670 #define REPEAT_MASK MASK_WORD3 (CR_RPT_C)
671 #define CR_MASK (MASK_WORD3 (CR_PSW) | MASK_WORD3 (CR_BPSW) \
672 | MASK_WORD3 (CR_PC) | MASK_WORD3 (CR_BPC) \
673 | MASK_WORD3 (CR_DPSW) | MASK_WORD3 (CR_DPC) \
674 | MASK_WORD3 (CR_RPT_C) | MASK_WORD3 (CR_RPT_S) \
675 | MASK_WORD3 (CR_RPT_E) | MASK_WORD3 (CR_MOD_S) \
676 | MASK_WORD3 (CR_MOD_E) | MASK_WORD3 (CR_IBA) \
677 | MASK_WORD3 (CR_EIT_VB) | MASK_WORD3 (CR_INT_S) \
678 | MASK_WORD3 (CR_INT_M))
680 #define ACCUM_MASK (MASK_WORD3 (ACCUM_A0) | MASK_WORD3 (ACCUM_A1))
681 #define OTHER_FLAG_MASK (MASK_WORD3 (FLAG_F2) | MASK_WORD3 (FLAG_F3) \
682 | MASK_WORD3 (FLAG_SAT) | MASK_WORD3 (FLAG_OVERFLOW) \
683 | MASK_WORD3 (FLAG_ACC_OVER) | MASK_WORD3 (FLAG_CARRY))
685 #define F0_MASK MASK_WORD3 (FLAG_F0)
686 #define F1_MASK MASK_WORD3 (FLAG_F1)
687 #define BR_FLAG_MASK (F0_MASK | F1_MASK)
688 #define FLAG_MASK (BR_FLAG_MASK | OTHER_FLAG_MASK)
689 #define SPECIAL_MASK MASK_WORD3 (ARG_POINTER_REGNUM)
691 #define ALL_MASK (CR_MASK | ACCUM_MASK | FLAG_MASK | SPECIAL_MASK)
693 /* An initializer containing the contents of the register classes, as integers
694 which are bit masks. The Nth integer specifies the contents of class N.
695 The way the integer MASK is interpreted is that register R is in the class
696 if `MASK & (1 << R)' is 1.
698 When the machine has more than 32 registers, an integer does not suffice.
699 Then the integers are replaced by sub-initializers, braced groupings
700 containing several integers. Each sub-initializer must be suitable as an
701 initializer for the type `HARD_REG_SET' which is defined in
703 #define REG_CLASS_CONTENTS \
705 { 0x00000000, 0x00000000, NO_MASK }, /* NO_REGS */ \
706 { 0x00000000, 0x00000000, REPEAT_MASK }, /* REPEAT_REGS */ \
707 { 0x00000000, 0x00000000, CR_MASK }, /* CR_REGS */ \
708 { 0x00000000, 0x00000000, ACCUM_MASK }, /* ACCUM_REGS */ \
709 { 0x00000000, 0x00000000, OTHER_FLAG_MASK }, /* OTHER_FLAG_REGS */ \
710 { 0x00000000, 0x00000000, F0_MASK }, /* F0_REGS */ \
711 { 0x00000000, 0x00000000, F1_MASK }, /* F1_REGS */ \
712 { 0x00000000, 0x00000000, BR_FLAG_MASK }, /* BR_FLAG_REGS */ \
713 { 0x00000000, 0x00000000, FLAG_MASK }, /* FLAG_REGS */ \
714 { 0xfffffffc, 0x3fffffff, NO_MASK }, /* EVEN_REGS */ \
715 { 0xffffffff, 0xffffffff, SPECIAL_MASK }, /* GPR_REGS */ \
716 { 0xffffffff, 0xffffffff, ALL_MASK }, /* ALL_REGS */ \
719 /* A C expression whose value is a register class containing hard register
720 REGNO. In general there is more than one such class; choose a class which
721 is "minimal", meaning that no smaller class also contains the register. */
723 extern enum reg_class regno_reg_class[FIRST_PSEUDO_REGISTER];
724 #define REGNO_REG_CLASS(REGNO) regno_reg_class[ (REGNO) ]
726 /* A macro whose definition is the name of the class to which a valid base
727 register must belong. A base register is one used in an address which is
728 the register value plus a displacement. */
729 #define BASE_REG_CLASS GPR_REGS
731 /* A macro whose definition is the name of the class to which a valid index
732 register must belong. An index register is one used in an address where its
733 value is either multiplied by a scale factor or added to another register
734 (as well as added to a displacement). */
735 #define INDEX_REG_CLASS GPR_REGS
737 /* A C expression which defines the machine-dependent operand constraint
738 letters for register classes. If CHAR is such a letter, the value should be
739 the register class corresponding to it. Otherwise, the value should be
740 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
741 will not be passed to this macro; you do not need to handle it.
743 The following letters are unavailable, due to being used as
748 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
749 'Q', 'R', 'S', 'T', 'U'
751 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
753 extern enum reg_class reg_class_from_letter[256];
754 #define REG_CLASS_FROM_LETTER(CHAR) reg_class_from_letter[(unsigned char)(CHAR)]
756 /* A C expression which is nonzero if register number NUM is suitable for use
757 as a base register in operand addresses. It may be either a suitable hard
758 register or a pseudo register that has been allocated such a hard register. */
760 #define REGNO_OK_FOR_BASE_P(NUM) \
761 ((NUM) < FIRST_PSEUDO_REGISTER \
763 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
766 /* A C expression which is nonzero if register number NUM is suitable for use
767 as an index register in operand addresses. It may be either a suitable hard
768 register or a pseudo register that has been allocated such a hard register.
770 The difference between an index register and a base register is that the
771 index register may be scaled. If an address involves the sum of two
772 registers, neither one of them scaled, then either one may be labeled the
773 "base" and the other the "index"; but whichever labeling is used must fit
774 the machine's constraints of which registers may serve in each capacity.
775 The compiler will try both labelings, looking for one that is valid, and
776 will reload one or both registers only if neither labeling works. */
778 #define REGNO_OK_FOR_INDEX_P(NUM) \
779 ((NUM) < FIRST_PSEUDO_REGISTER \
781 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
783 /* A C expression that places additional restrictions on the register class to
784 use when it is necessary to copy value X into a register in class CLASS.
785 The value is a register class; perhaps CLASS, or perhaps another, smaller
786 class. On many machines, the following definition is safe:
788 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
790 Sometimes returning a more restrictive class makes better code. For
791 example, on the 68000, when X is an integer constant that is in range for a
792 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
793 as CLASS includes the data registers. Requiring a data register guarantees
794 that a `moveq' will be used.
796 If X is a `const_double', by returning `NO_REGS' you can force X into a
797 memory constant. This is useful on certain machines where immediate
798 floating values cannot be loaded into certain kinds of registers. */
799 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
801 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
802 reloads. If you don't define this macro, the default is to use CLASS,
804 /* #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) */
806 /* A C expression that places additional restrictions on the register class to
807 use when it is necessary to be able to hold a value of mode MODE in a reload
808 register for which class CLASS would ordinarily be used.
810 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
811 certain modes that simply can't go in certain reload classes.
813 The value is a register class; perhaps CLASS, or perhaps another, smaller
816 Don't define this macro unless the target machine has limitations which
817 require the macro to do something nontrivial. */
818 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
820 /* Many machines have some registers that cannot be copied directly to or from
821 memory or even from other types of registers. An example is the `MQ'
822 register, which on most machines, can only be copied to or from general
823 registers, but not memory. Some machines allow copying all registers to and
824 from memory, but require a scratch register for stores to some memory
825 locations (e.g., those with symbolic address on the RT, and those with
826 certain symbolic address on the Sparc when compiling PIC). In some cases,
827 both an intermediate and a scratch register are required.
829 You should define these macros to indicate to the reload phase that it may
830 need to allocate at least one register for a reload in addition to the
831 register to contain the data. Specifically, if copying X to a register
832 CLASS in MODE requires an intermediate register, you should define
833 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
834 whose registers can be used as intermediate registers or scratch registers.
836 If copying a register CLASS in MODE to X requires an intermediate or scratch
837 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
838 largest register class required. If the requirements for input and output
839 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
840 instead of defining both macros identically.
842 The values returned by these macros are often `GENERAL_REGS'. Return
843 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
844 to or from a register of CLASS in MODE without requiring a scratch register.
845 Do not define this macro if it would always return `NO_REGS'.
847 If a scratch register is required (either with or without an intermediate
848 register), you should define patterns for `reload_inM' or `reload_outM', as
849 required (*note Standard Names::.. These patterns, which will normally be
850 implemented with a `define_expand', should be similar to the `movM'
851 patterns, except that operand 2 is the scratch register.
853 Define constraints for the reload register and scratch register that contain
854 a single register class. If the original reload register (whose class is
855 CLASS) can meet the constraint given in the pattern, the value returned by
856 these macros is used for the class of the scratch register. Otherwise, two
857 additional reload registers are required. Their classes are obtained from
858 the constraints in the insn pattern.
860 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
861 either be in a hard register or in memory. Use `true_regnum' to find out;
862 it will return -1 if the pseudo is in memory and the hard register number if
865 These macros should not be used in the case where a particular class of
866 registers can only be copied to memory and not to another class of
867 registers. In that case, secondary reload registers are not needed and
868 would not be helpful. Instead, a stack location must be used to perform the
869 copy and the `movM' pattern should use memory as an intermediate storage.
870 This case often occurs between floating-point and general registers. */
872 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
873 ((CLASS) == GPR_REGS ? NO_REGS \
874 : (CLASS) == EVEN_REGS ? NO_REGS \
875 : (CLASS) == ACCUM_REGS ? EVEN_REGS \
878 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
879 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
881 /* Certain machines have the property that some registers cannot be copied to
882 some other registers without using memory. Define this macro on those
883 machines to be a C expression that is non-zero if objects of mode M in
884 registers of CLASS1 can only be copied to registers of class CLASS2 by
885 storing a register of CLASS1 into memory and loading that memory location
886 into a register of CLASS2.
888 Do not define this macro if its value would always be zero. */
889 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
891 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
892 stack slot for a memory location needed for register copies. If this macro
893 is defined, the compiler instead uses the memory location defined by this
896 Do not define this macro if you do not define
897 `SECONDARY_MEMORY_NEEDED'. */
898 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
900 /* When the compiler needs a secondary memory location to copy between two
901 registers of mode MODE, it normally allocates sufficient memory to hold a
902 quantity of `BITS_PER_WORD' bits and performs the store and load operations
903 in a mode that many bits wide and whose class is the same as that of MODE.
905 This is right thing to do on most machines because it ensures that all bits
906 of the register are copied and prevents accesses to the registers in a
907 narrower mode, which some machines prohibit for floating-point registers.
909 However, this default behavior is not correct on some machines, such as the
910 DEC Alpha, that store short integers in floating-point registers differently
911 than in integer registers. On those machines, the default widening will not
912 work correctly and you must define this macro to suppress that widening in
913 some cases. See the file `alpha.h' for details.
915 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
916 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
918 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
920 /* Normally the compiler avoids choosing registers that have been explicitly
921 mentioned in the rtl as spill registers (these registers are normally those
922 used to pass parameters and return values). However, some machines have so
923 few registers of certain classes that there would not be enough registers to
924 use as spill registers if this were done.
926 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
927 these machines. When this macro has a non-zero value, the compiler allows
928 registers explicitly used in the rtl to be used as spill registers but
929 avoids extending the lifetime of these registers.
931 It is always safe to define this macro with a non-zero value, but if you
932 unnecessarily define it, you will reduce the amount of optimizations that
933 can be performed in some cases. If you do not define this macro with a
934 non-zero value when it is required, the compiler will run out of spill
935 registers and print a fatal error message. For most machines, you should
936 not define this macro at all. */
937 /* #define SMALL_REGISTER_CLASSES */
939 /* A C expression whose value is nonzero if pseudos that have been assigned to
940 registers of class CLASS would likely be spilled because registers of CLASS
941 are needed for spill registers.
943 The default value of this macro returns 1 if CLASS has exactly one register
944 and zero otherwise. On most machines, this default should be used. Only
945 define this macro to some other expression if pseudo allocated by
946 `local-alloc.c' end up in memory because their hard registers were needed
947 for spill registers. If this macro returns nonzero for those classes, those
948 pseudos will only be allocated by `global.c', which knows how to reallocate
949 the pseudo to another register. If there would not be another register
950 available for reallocation, you should not change the definition of this
951 macro since the only effect of such a definition would be to slow down
952 register allocation. */
953 #define CLASS_LIKELY_SPILLED_P(CLASS) \
954 ((CLASS) != GPR_REGS && (CLASS) != EVEN_REGS)
956 /* A C expression for the maximum number of consecutive registers of
957 class CLASS needed to hold a value of mode MODE.
959 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
960 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
961 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
963 This macro helps control the handling of multiple-word values in
966 #define CLASS_MAX_NREGS(CLASS, MODE) \
967 (((CLASS) == ACCUM_REGS) \
968 ? ((GET_MODE_SIZE (MODE) + 8 - 1) / 8) \
969 : ((GET_MODE_SIZE (MODE) + 4 - 1) / 4))
971 /* A C expression that defines the machine-dependent operand constraint letters
972 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
973 If C is one of those letters, the expression should check that VALUE, an
974 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
975 is not one of those letters, the value should be 0 regardless of VALUE. */
976 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
977 ((C) == 'I' ? IN_RANGE_P (VALUE, -32, 31) \
978 : (C) == 'J' ? IN_RANGE_P (VALUE, 0, 31) \
979 : (C) == 'K' ? IN_RANGE_P (exact_log2 (VALUE), 0, 31) \
980 : (C) == 'L' ? IN_RANGE_P (exact_log2 (~ (VALUE)), 0, 31) \
981 : (C) == 'M' ? ((VALUE) == 32) \
982 : (C) == 'N' ? ((VALUE) == 1) \
983 : (C) == 'O' ? ((VALUE) == 0) \
984 : (C) == 'P' ? IN_RANGE_P (VALUE, 32, 63) \
987 /* A C expression that defines the machine-dependent operand constraint letters
988 (`G', `H') that specify particular ranges of `const_double' values.
990 If C is one of those letters, the expression should check that VALUE, an RTX
991 of code `const_double', is in the appropriate range and return 1 if so, 0
992 otherwise. If C is not one of those letters, the value should be 0
995 `const_double' is used for all floating-point constants and for `DImode'
996 fixed-point constants. A given letter can accept either or both kinds of
997 values. It can use `GET_MODE' to distinguish between these kinds. */
998 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
999 ((C) == 'G' ? (CONST_DOUBLE_LOW (VALUE) == 0 \
1000 && CONST_DOUBLE_HIGH (VALUE) == 0) \
1001 : (C) == 'H' ? FALSE \
1004 /* A C expression that defines the optional machine-dependent constraint
1005 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1006 types of operands, usually memory references, for the target machine.
1007 Normally this macro will not be defined. If it is required for a particular
1008 target machine, it should return 1 if VALUE corresponds to the operand type
1009 represented by the constraint letter C. If C is not defined as an extra
1010 constraint, the value returned should be 0 regardless of VALUE.
1012 For example, on the ROMP, load instructions cannot have their output in r0
1013 if the memory reference contains a symbolic address. Constraint letter `Q'
1014 is defined as representing a memory address that does *not* contain a
1015 symbolic address. An alternative is specified with a `Q' constraint on the
1016 input and `r' on the output. The next alternative specifies `m' on the
1017 input and a register class that does not include r0 on the output. */
1019 #define EXTRA_CONSTRAINT(VALUE, C) \
1020 (((C) == 'Q') ? short_memory_operand ((VALUE), GET_MODE (VALUE)) \
1021 : ((C) == 'R') ? single_reg_memory_operand ((VALUE), GET_MODE (VALUE)) \
1022 : ((C) == 'S') ? const_addr_memory_operand ((VALUE), GET_MODE (VALUE)) \
1023 : ((C) == 'T') ? long_memory_operand ((VALUE), GET_MODE (VALUE)) \
1024 : ((C) == 'U') ? FALSE \
1028 /* Basic Stack Layout */
1032 /* Structure used to define the d30v stack */
1033 typedef struct d30v_stack {
1034 int varargs_p; /* whether this is a varargs function */
1035 int varargs_size; /* size to hold varargs args passed in regs */
1036 int vars_size; /* variable save area size */
1037 int parm_size; /* outgoing parameter size */
1038 int gpr_size; /* size of saved GPR registers */
1039 int accum_size; /* size of saved ACCUM registers */
1040 int total_size; /* total bytes allocated for stack */
1041 /* which registers are to be saved */
1042 int save_offset; /* offset from new sp to start saving vars at */
1043 int link_offset; /* offset r62 is saved at */
1044 int memrefs_varargs; /* # of 2 word memory references for varargs */
1045 int memrefs_2words; /* # of 2 word memory references */
1046 int memrefs_1word; /* # of 1 word memory references */
1047 /* 1 for ldw/stw ops; 2 for ld2w/st2w ops */
1048 unsigned char save_p[FIRST_PSEUDO_REGISTER];
1051 /* Define this macro if pushing a word onto the stack moves the stack pointer
1052 to a smaller address.
1054 When we say, "define this macro if ...," it means that the compiler checks
1055 this macro only with `#ifdef' so the precise definition used does not
1057 #define STACK_GROWS_DOWNWARD 1
1059 /* Define this macro if the addresses of local variable slots are at negative
1060 offsets from the frame pointer. */
1061 /* #define FRAME_GROWS_DOWNWARD */
1063 /* Define this macro if successive arguments to a function occupy decreasing
1064 addresses on the stack. */
1065 /* #define ARGS_GROW_DOWNWARD */
1067 /* Offset from the frame pointer to the first local variable slot to be
1070 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
1071 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
1072 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
1074 #define STARTING_FRAME_OFFSET \
1075 (D30V_ALIGN (current_function_outgoing_args_size, \
1076 (STACK_BOUNDARY / BITS_PER_UNIT)))
1078 /* Offset from the stack pointer register to the first location at which
1079 outgoing arguments are placed. If not specified, the default value of zero
1080 is used. This is the proper value for most machines.
1082 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1083 location at which outgoing arguments are placed. */
1084 /* #define STACK_POINTER_OFFSET */
1086 /* Offset from the argument pointer register to the first argument's address.
1087 On some machines it may depend on the data type of the function.
1089 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1090 argument's address. */
1091 #define FIRST_PARM_OFFSET(FUNDECL) 0
1093 /* Offset from the stack pointer register to an item dynamically allocated on
1094 the stack, e.g., by `alloca'.
1096 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1097 of the outgoing arguments. The default is correct for most machines. See
1098 `function.c' for details. */
1099 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1101 /* A C expression whose value is RTL representing the address in a stack frame
1102 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1103 an RTL expression for the address of the stack frame itself.
1105 If you don't define this macro, the default is to return the value of
1106 FRAMEADDR--that is, the stack frame address is also the address of the stack
1107 word that points to the previous frame. */
1108 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1110 /* If defined, a C expression that produces the machine-specific code to setup
1111 the stack so that arbitrary frames can be accessed. For example, on the
1112 Sparc, we must flush all of the register windows to the stack before we can
1113 access arbitrary stack frames. This macro will seldom need to be defined. */
1114 /* #define SETUP_FRAME_ADDRESSES() */
1116 /* A C expression whose value is RTL representing the value of the return
1117 address for the frame COUNT steps up from the current frame, after the
1118 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1119 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1122 The value of the expression must always be the correct address when COUNT is
1123 zero, but may be `NULL_RTX' if there is not way to determine the return
1124 address of other frames. */
1126 /* ??? This definition fails for leaf functions. There is currently no
1127 general solution for this problem. */
1129 /* ??? There appears to be no way to get the return address of any previous
1130 frame except by disassembling instructions in the prologue/epilogue.
1131 So currently we support only the current frame. */
1133 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1134 ((COUNT) == 0 ? d30v_return_addr() : const0_rtx)
1136 /* Define this if the return address of a particular stack frame is
1137 accessed from the frame pointer of the previous stack frame. */
1138 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1140 /* A C expression whose value is RTL representing the location of the incoming
1141 return address at the beginning of any function, before the prologue. This
1142 RTL is either a `REG', indicating that the return value is saved in `REG',
1143 or a `MEM' representing a location in the stack.
1145 You only need to define this macro if you want to support call frame
1146 debugging information like that provided by DWARF 2. */
1148 /* Before the prologue, RA lives in r62. */
1149 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, GPR_LINK)
1151 /* A C expression whose value is an integer giving the offset, in bytes, from
1152 the value of the stack pointer register to the top of the stack frame at the
1153 beginning of any function, before the prologue. The top of the frame is
1154 defined to be the value of the stack pointer in the previous frame, just
1155 before the call instruction.
1157 You only need to define this macro if you want to support call frame
1158 debugging information like that provided by DWARF 2. */
1159 #define INCOMING_FRAME_SP_OFFSET 0
1161 /* Initialize data used by insn expanders. This is called from insn_emit,
1162 once for every function before code is generated. */
1164 #define INIT_EXPANDERS d30v_init_expanders ()
1167 /* Stack Checking. */
1169 /* A nonzero value if stack checking is done by the configuration files in a
1170 machine-dependent manner. You should define this macro if stack checking is
1171 require by the ABI of your machine or if you would like to have to stack
1172 checking in some more efficient way than GNU CC's portable approach. The
1173 default value of this macro is zero. */
1174 /* #define STACK_CHECK_BUILTIN */
1176 /* An integer representing the interval at which GNU CC must generate stack
1177 probe instructions. You will normally define this macro to be no larger
1178 than the size of the "guard pages" at the end of a stack area. The default
1179 value of 4096 is suitable for most systems. */
1180 /* #define STACK_CHECK_PROBE_INTERVAL */
1182 /* An integer which is nonzero if GNU CC should perform the stack probe as a
1183 load instruction and zero if GNU CC should use a store instruction. The
1184 default is zero, which is the most efficient choice on most systems. */
1185 /* #define STACK_CHECK_PROBE_LOAD */
1187 /* The number of bytes of stack needed to recover from a stack overflow, for
1188 languages where such a recovery is supported. The default value of 75 words
1189 should be adequate for most machines. */
1190 /* #define STACK_CHECK_PROTECT */
1192 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
1193 instructions in non-leaf functions to ensure at least this many bytes of
1194 stack are available. If a stack frame is larger than this size, stack
1195 checking will not be reliable and GNU CC will issue a warning. The default
1196 is chosen so that GNU CC only generates one instruction on most systems.
1197 You should normally not change the default value of this macro. */
1198 /* #define STACK_CHECK_MAX_FRAME_SIZE */
1200 /* GNU CC uses this value to generate the above warning message. It represents
1201 the amount of fixed frame used by a function, not including space for any
1202 callee-saved registers, temporaries and user variables. You need only
1203 specify an upper bound for this amount and will normally use the default of
1205 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
1207 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
1208 area of the stack frame when the user specifies `-fstack-check'. GNU CC
1209 computed the default from the values of the above macros and you will
1210 normally not need to override that default. */
1211 /* #define STACK_CHECK_MAX_VAR_SIZE */
1214 /* Register That Address the Stack Frame. */
1216 /* The register number of the stack pointer register, which must also be a
1217 fixed register according to `FIXED_REGISTERS'. On most machines, the
1218 hardware determines which register this is. */
1219 #define STACK_POINTER_REGNUM GPR_SP
1221 /* The register number of the frame pointer register, which is used to access
1222 automatic variables in the stack frame. On some machines, the hardware
1223 determines which register this is. On other machines, you can choose any
1224 register you wish for this purpose. */
1225 #define FRAME_POINTER_REGNUM GPR_FP
1227 /* On some machines the offset between the frame pointer and starting offset of
1228 the automatic variables is not known until after register allocation has
1229 been done (for example, because the saved registers are between these two
1230 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
1231 a special, fixed register to be used internally until the offset is known,
1232 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
1233 used for the frame pointer.
1235 You should define this macro only in the very rare circumstances when it is
1236 not possible to calculate the offset between the frame pointer and the
1237 automatic variables until after register allocation has been completed.
1238 When this macro is defined, you must also indicate in your definition of
1239 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
1240 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
1242 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
1243 /* #define HARD_FRAME_POINTER_REGNUM */
1245 /* The register number of the arg pointer register, which is used to access the
1246 function's argument list. On some machines, this is the same as the frame
1247 pointer register. On some machines, the hardware determines which register
1248 this is. On other machines, you can choose any register you wish for this
1249 purpose. If this is not the same register as the frame pointer register,
1250 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
1251 arrange to be able to eliminate it (*note Elimination::.). */
1252 /* #define ARG_POINTER_REGNUM */
1254 /* The register number of the return address pointer register, which is used to
1255 access the current function's return address from the stack. On some
1256 machines, the return address is not at a fixed offset from the frame pointer
1257 or stack pointer or argument pointer. This register can be defined to point
1258 to the return address on the stack, and then be converted by
1259 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
1261 Do not define this macro unless there is no other way to get the return
1262 address from the stack. */
1263 /* #define RETURN_ADDRESS_POINTER_REGNUM */
1265 /* Register numbers used for passing a function's static chain pointer. If
1266 register windows are used, the register number as seen by the called
1267 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
1268 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
1269 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
1271 The static chain register need not be a fixed register.
1273 If the static chain is passed in memory, these macros should not be defined;
1274 instead, the next two macros should be defined. */
1276 #define STATIC_CHAIN_REGNUM (GPR_FIRST + 18)
1277 /* #define STATIC_CHAIN_INCOMING_REGNUM */
1279 /* If the static chain is passed in memory, these macros provide rtx giving
1280 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
1281 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
1282 functions, respectively. Often the former will be at an offset from the
1283 stack pointer and the latter at an offset from the frame pointer.
1285 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
1286 `arg_pointer_rtx' will have been initialized prior to the use of these
1287 macros and should be used to refer to those items.
1289 If the static chain is passed in a register, the two previous
1290 macros should be defined instead. */
1291 /* #define STATIC_CHAIN */
1292 /* #define STATIC_CHAIN_INCOMING */
1295 /* Eliminating the Frame Pointer and the Arg Pointer */
1297 /* A C expression which is nonzero if a function must have and use a frame
1298 pointer. This expression is evaluated in the reload pass. If its value is
1299 nonzero the function will have a frame pointer.
1301 The expression can in principle examine the current function and decide
1302 according to the facts, but on most machines the constant 0 or the constant
1303 1 suffices. Use 0 when the machine allows code to be generated with no
1304 frame pointer, and doing so saves some time or space. Use 1 when there is
1305 no possible advantage to avoiding a frame pointer.
1307 In certain cases, the compiler does not know how to produce valid code
1308 without a frame pointer. The compiler recognizes those cases and
1309 automatically gives the function a frame pointer regardless of what
1310 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
1312 In a function that does not require a frame pointer, the frame pointer
1313 register can be allocated for ordinary usage, unless you mark it as a fixed
1314 register. See `FIXED_REGISTERS' for more information. */
1315 #define FRAME_POINTER_REQUIRED 0
1317 /* A C statement to store in the variable DEPTH-VAR the difference between the
1318 frame pointer and the stack pointer values immediately after the function
1319 prologue. The value would be computed from information such as the result
1320 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
1323 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
1324 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
1325 is defined to always be true; in that case, you may set DEPTH-VAR to
1327 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
1329 /* If defined, this macro specifies a table of register pairs used to eliminate
1330 unneeded registers that point into the stack frame. If it is not defined,
1331 the only elimination attempted by the compiler is to replace references to
1332 the frame pointer with references to the stack pointer.
1334 The definition of this macro is a list of structure initializations, each of
1335 which specifies an original and replacement register.
1337 On some machines, the position of the argument pointer is not known until
1338 the compilation is completed. In such a case, a separate hard register must
1339 be used for the argument pointer. This register can be eliminated by
1340 replacing it with either the frame pointer or the argument pointer,
1341 depending on whether or not the frame pointer has been eliminated.
1343 In this case, you might specify:
1344 #define ELIMINABLE_REGS \
1345 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1346 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
1347 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
1349 Note that the elimination of the argument pointer with the stack pointer is
1350 specified first since that is the preferred elimination. */
1351 #define ELIMINABLE_REGS \
1353 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
1354 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \
1355 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } \
1358 /* A C expression that returns non-zero if the compiler is allowed to try to
1359 replace register number FROM-REG with register number TO-REG. This macro
1360 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
1361 the constant 1, since most of the cases preventing register elimination are
1362 things that the compiler already knows about. */
1364 #define CAN_ELIMINATE(FROM, TO) \
1365 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
1366 ? ! frame_pointer_needed \
1369 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
1370 initial difference between the specified pair of registers. This macro must
1371 be defined if `ELIMINABLE_REGS' is defined. */
1373 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1375 d30v_stack_t *info = d30v_stack_info (); \
1377 if ((FROM) == FRAME_POINTER_REGNUM) \
1379 else if ((FROM) == ARG_POINTER_REGNUM) \
1380 (OFFSET) = info->total_size - current_function_pretend_args_size; \
1386 /* Passing Function Arguments on the Stack */
1388 /* Define this macro if an argument declared in a prototype as an integral type
1389 smaller than `int' should actually be passed as an `int'. In addition to
1390 avoiding errors in certain cases of mismatch, it also makes for better code
1391 on certain machines. */
1392 /* #define PROMOTE_PROTOTYPES */
1394 /* A C expression that is the number of bytes actually pushed onto the stack
1395 when an instruction attempts to push NPUSHED bytes.
1397 If the target machine does not have a push instruction, do not define this
1398 macro. That directs GNU CC to use an alternate strategy: to allocate the
1399 entire argument block and then store the arguments into it.
1401 On some machines, the definition
1403 #define PUSH_ROUNDING(BYTES) (BYTES)
1405 will suffice. But on other machines, instructions that appear to push one
1406 byte actually push two bytes in an attempt to maintain alignment. Then the
1407 definition should be
1409 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
1410 /* #define PUSH_ROUNDING(NPUSHED) */
1412 /* If defined, the maximum amount of space required for outgoing arguments will
1413 be computed and placed into the variable
1414 `current_function_outgoing_args_size'. No space will be pushed onto the
1415 stack for each call; instead, the function prologue should increase the
1416 stack frame size by this amount.
1418 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
1420 #define ACCUMULATE_OUTGOING_ARGS 1
1422 /* Define this macro if functions should assume that stack space has been
1423 allocated for arguments even when their values are passed in registers.
1425 The value of this macro is the size, in bytes, of the area reserved for
1426 arguments passed in registers for the function represented by FNDECL.
1428 This space can be allocated by the caller, or be a part of the
1429 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
1431 /* #define REG_PARM_STACK_SPACE(FNDECL) */
1433 /* Define these macros in addition to the one above if functions might allocate
1434 stack space for arguments even when their values are passed in registers.
1435 These should be used when the stack space allocated for arguments in
1436 registers is not a simple constant independent of the function declaration.
1438 The value of the first macro is the size, in bytes, of the area that we
1439 should initially assume would be reserved for arguments passed in registers.
1441 The value of the second macro is the actual size, in bytes, of the area that
1442 will be reserved for arguments passed in registers. This takes two
1443 arguments: an integer representing the number of bytes of fixed sized
1444 arguments on the stack, and a tree representing the number of bytes of
1445 variable sized arguments on the stack.
1447 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
1448 for libcall functions, the current function, or for a function being called
1449 when it is known that such stack space must be allocated. In each case this
1450 value can be easily computed.
1452 When deciding whether a called function needs such stack space, and how much
1453 space to reserve, GNU CC uses these two macros instead of
1454 `REG_PARM_STACK_SPACE'. */
1455 /* #define MAYBE_REG_PARM_STACK_SPACE */
1456 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
1458 /* Define this if it is the responsibility of the caller to allocate the area
1459 reserved for arguments passed in registers.
1461 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
1462 space for these arguments counts in the value of
1463 `current_function_outgoing_args_size'. */
1464 /* #define OUTGOING_REG_PARM_STACK_SPACE */
1466 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
1467 parameters don't skip the area specified by it.
1469 Normally, when a parameter is not passed in registers, it is placed on the
1470 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
1471 suppresses this behavior and causes the parameter to be passed on the stack
1472 in its natural location. */
1473 /* #define STACK_PARMS_IN_REG_PARM_AREA */
1475 /* A C expression that should indicate the number of bytes of its own arguments
1476 that a function pops on returning, or 0 if the function pops no arguments
1477 and the caller must therefore pop them all after the function returns.
1479 FUNDECL is a C variable whose value is a tree node that describes the
1480 function in question. Normally it is a node of type `FUNCTION_DECL' that
1481 describes the declaration of the function. From this it is possible to
1482 obtain the DECL_ATTRIBUTES of the function.
1484 FUNTYPE is a C variable whose value is a tree node that describes the
1485 function in question. Normally it is a node of type `FUNCTION_TYPE' that
1486 describes the data type of the function. From this it is possible to obtain
1487 the data types of the value and arguments (if known).
1489 When a call to a library function is being considered, FUNTYPE will contain
1490 an identifier node for the library function. Thus, if you need to
1491 distinguish among various library functions, you can do so by their names.
1492 Note that "library function" in this context means a function used to
1493 perform arithmetic, whose name is known specially in the compiler and was
1494 not mentioned in the C code being compiled.
1496 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
1497 variable number of bytes is passed, it is zero, and argument popping will
1498 always be the responsibility of the calling function.
1500 On the VAX, all functions always pop their arguments, so the definition of
1501 this macro is STACK-SIZE. On the 68000, using the standard calling
1502 convention, no functions pop their arguments, so the value of the macro is
1503 always 0 in this case. But an alternative calling convention is available
1504 in which functions that take a fixed number of arguments pop them but other
1505 functions (such as `printf') pop nothing (the caller pops all). When this
1506 convention is in use, FUNTYPE is examined to determine whether a function
1507 takes a fixed number of arguments. */
1508 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
1511 /* Function Arguments in Registers */
1513 /* A C expression that controls whether a function argument is passed in a
1514 register, and which register.
1516 The arguments are CUM, which summarizes all the previous arguments; MODE,
1517 the machine mode of the argument; TYPE, the data type of the argument as a
1518 tree node or 0 if that is not known (which happens for C support library
1519 functions); and NAMED, which is 1 for an ordinary argument and 0 for
1520 nameless arguments that correspond to `...' in the called function's
1523 The value of the expression should either be a `reg' RTX for the hard
1524 register in which to pass the argument, or zero to pass the argument on the
1527 For machines like the VAX and 68000, where normally all arguments are
1528 pushed, zero suffices as a definition.
1530 The usual way to make the ANSI library `stdarg.h' work on a machine where
1531 some arguments are usually passed in registers, is to cause nameless
1532 arguments to be passed on the stack instead. This is done by making
1533 `FUNCTION_ARG' return 0 whenever NAMED is 0.
1535 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
1536 this macro to determine if this argument is of a type that must be passed in
1537 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
1538 returns non-zero for such an argument, the compiler will abort. If
1539 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
1540 stack and then loaded into a register. */
1542 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1543 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, FALSE)
1545 /* Define this macro if the target machine has "register windows", so that the
1546 register in which a function sees an arguments is not necessarily the same
1547 as the one in which the caller passed the argument.
1549 For such machines, `FUNCTION_ARG' computes the register in which the caller
1550 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
1551 fashion to tell the function being called where the arguments will arrive.
1553 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
1556 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
1557 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, TRUE)
1559 /* A C expression for the number of words, at the beginning of an argument,
1560 must be put in registers. The value must be zero for arguments that are
1561 passed entirely in registers or that are entirely pushed on the stack.
1563 On some machines, certain arguments must be passed partially in registers
1564 and partially in memory. On these machines, typically the first N words of
1565 arguments are passed in registers, and the rest on the stack. If a
1566 multi-word argument (a `double' or a structure) crosses that boundary, its
1567 first few words must be passed in registers and the rest must be pushed.
1568 This macro tells the compiler when this occurs, and how many of the words
1569 should go in registers.
1571 `FUNCTION_ARG' for these arguments should return the first register to be
1572 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
1573 the called function. */
1574 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1575 d30v_function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED)
1577 /* A C expression that indicates when an argument must be passed by reference.
1578 If nonzero for an argument, a copy of that argument is made in memory and a
1579 pointer to the argument is passed instead of the argument itself. The
1580 pointer is passed in whatever way is appropriate for passing a pointer to
1583 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
1584 definition of this macro might be
1585 #define FUNCTION_ARG_PASS_BY_REFERENCE\
1586 (CUM, MODE, TYPE, NAMED) \
1587 MUST_PASS_IN_STACK (MODE, TYPE) */
1588 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
1590 /* If defined, a C expression that indicates when it is the called function's
1591 responsibility to make a copy of arguments passed by invisible reference.
1592 Normally, the caller makes a copy and passes the address of the copy to the
1593 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
1594 nonzero, the caller does not make a copy. Instead, it passes a pointer to
1595 the "live" value. The called function must not modify this value. If it
1596 can be determined that the value won't be modified, it need not make a copy;
1597 otherwise a copy must be made. */
1598 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
1600 /* A C type for declaring a variable that is used as the first argument of
1601 `FUNCTION_ARG' and other related values. For some target machines, the type
1602 `int' suffices and can hold the number of bytes of argument so far.
1604 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
1605 that have been passed on the stack. The compiler has other variables to
1606 keep track of that. For target machines on which all arguments are passed
1607 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
1608 however, the data structure must exist and should not be empty, so use
1610 #define CUMULATIVE_ARGS int
1612 /* A C statement (sans semicolon) for initializing the variable CUM for the
1613 state at the beginning of the argument list. The variable has type
1614 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
1615 of the function which will receive the args, or 0 if the args are to a
1616 compiler support library function. The value of INDIRECT is nonzero when
1617 processing an indirect call, for example a call through a function pointer.
1618 The value of INDIRECT is zero for a call to an explicitly named function, a
1619 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
1620 arguments for the function being compiled.
1622 When processing a call to a compiler support library function, LIBNAME
1623 identifies which one. It is a `symbol_ref' rtx which contains the name of
1624 the function, as a string. LIBNAME is 0 when an ordinary C function call is
1625 being processed. Thus, each time this macro is called, either LIBNAME or
1626 FNTYPE is nonzero, but never both of them at once. */
1628 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
1629 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, INDIRECT, FALSE)
1631 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
1632 arguments for the function being compiled. If this macro is undefined,
1633 `INIT_CUMULATIVE_ARGS' is used instead.
1635 The value passed for LIBNAME is always 0, since library routines with
1636 special calling conventions are never compiled with GNU CC. The argument
1637 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
1639 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
1640 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, TRUE)
1642 /* A C statement (sans semicolon) to update the summarizer variable CUM to
1643 advance past an argument in the argument list. The values MODE, TYPE and
1644 NAMED describe that argument. Once this is done, the variable CUM is
1645 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
1647 This macro need not do anything if the argument in question was passed on
1648 the stack. The compiler knows how to track the amount of stack space used
1649 for arguments without any special help. */
1651 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1652 d30v_function_arg_advance (&CUM, (int) MODE, TYPE, NAMED)
1654 /* If defined, a C expression which determines whether, and in which direction,
1655 to pad out an argument with extra space. The value should be of type `enum
1656 direction': either `upward' to pad above the argument, `downward' to pad
1657 below, or `none' to inhibit padding.
1659 The *amount* of padding is always just enough to reach the next multiple of
1660 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
1662 This macro has a default definition which is right for most systems. For
1663 little-endian machines, the default is to pad upward. For big-endian
1664 machines, the default is to pad downward for an argument of constant size
1665 shorter than an `int', and upward otherwise. */
1666 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
1668 /* If defined, a C expression that gives the alignment boundary, in bits, of an
1669 argument with the specified mode and type. If it is not defined,
1670 `PARM_BOUNDARY' is used for all arguments. */
1672 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
1673 d30v_function_arg_boundary ((int) MODE, TYPE)
1675 /* A C expression that is nonzero if REGNO is the number of a hard register in
1676 which function arguments are sometimes passed. This does *not* include
1677 implicit arguments such as the static chain and the structure-value address.
1678 On many machines, no registers can be used for this purpose since all
1679 function arguments are pushed on the stack. */
1681 #define FUNCTION_ARG_REGNO_P(REGNO) \
1682 IN_RANGE_P (REGNO, GPR_ARG_FIRST, GPR_ARG_LAST)
1685 /* How Scalar Function Values are Returned */
1687 /* A C expression to create an RTX representing the place where a function
1688 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
1689 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
1690 represent that type. On many machines, only the mode is relevant.
1691 (Actually, on most machines, scalar values are returned in the same place
1692 regardless of mode).
1694 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
1695 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
1697 If the precise function being called is known, FUNC is a tree node
1698 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
1699 possible to use a different value-returning convention for specific
1700 functions when all their calls are known.
1702 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
1703 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
1704 related macros, below. */
1706 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1707 gen_rtx (REG, TYPE_MODE (VALTYPE), GPR_RET_VALUE)
1709 /* Define this macro if the target machine has "register windows" so that the
1710 register in which a function returns its value is not the same as the one in
1711 which the caller sees the value.
1713 For such machines, `FUNCTION_VALUE' computes the register in which the
1714 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
1715 similar fashion to tell the function where to put the value.
1717 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
1720 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
1721 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
1722 and related macros, below. */
1723 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
1725 /* A C expression to create an RTX representing the place where a library
1726 function returns a value of mode MODE. If the precise function being called
1727 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
1728 null pointer. This makes it possible to use a different value-returning
1729 convention for specific functions when all their calls are known.
1731 Note that "library function" in this context means a compiler support
1732 routine, used to perform arithmetic, whose name is known specially by the
1733 compiler and was not mentioned in the C code being compiled.
1735 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
1736 types, because none of the library functions returns such types. */
1738 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, GPR_RET_VALUE)
1740 /* A C expression that is nonzero if REGNO is the number of a hard register in
1741 which the values of called function may come back.
1743 A register whose use for returning values is limited to serving as the
1744 second of a pair (for a value of type `double', say) need not be recognized
1745 by this macro. So for most machines, this definition suffices:
1747 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
1749 If the machine has register windows, so that the caller and the called
1750 function use different registers for the return value, this macro should
1751 recognize only the caller's register numbers. */
1753 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == GPR_RET_VALUE)
1755 /* Define this macro if `untyped_call' and `untyped_return' need more space
1756 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
1757 arbitrary return value. */
1758 /* #define APPLY_RESULT_SIZE */
1761 /* How Large Values are Returned */
1763 /* A C expression which can inhibit the returning of certain function values in
1764 registers, based on the type of value. A nonzero value says to return the
1765 function value in memory, just as large structures are always returned.
1766 Here TYPE will be a C expression of type `tree', representing the data type
1769 Note that values of mode `BLKmode' must be explicitly handled by this macro.
1770 Also, the option `-fpcc-struct-return' takes effect regardless of this
1771 macro. On most systems, it is possible to leave the macro undefined; this
1772 causes a default definition to be used, whose value is the constant 1 for
1773 `BLKmode' values, and 0 otherwise.
1775 Do not use this macro to indicate that structures and unions should always
1776 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
1777 to indicate this. */
1778 /* #define RETURN_IN_MEMORY(TYPE) */
1780 /* Define this macro to be 1 if all structure and union return values must be
1781 in memory. Since this results in slower code, this should be defined only
1782 if needed for compatibility with other compilers or with an ABI. If you
1783 define this macro to be 0, then the conventions used for structure and union
1784 return values are decided by the `RETURN_IN_MEMORY' macro.
1786 If not defined, this defaults to the value 1. */
1787 /* #define DEFAULT_PCC_STRUCT_RETURN */
1789 /* If the structure value address is passed in a register, then
1790 `STRUCT_VALUE_REGNUM' should be the number of that register. */
1792 #define STRUCT_VALUE_REGNUM GPR_ARG_FIRST
1794 /* If the structure value address is not passed in a register, define
1795 `STRUCT_VALUE' as an expression returning an RTX for the place where the
1796 address is passed. If it returns 0, the address is passed as an "invisible"
1799 #define STRUCT_VALUE 0
1801 /* On some architectures the place where the structure value address is found
1802 by the called function is not the same place that the caller put it. This
1803 can be due to register windows, or it could be because the function prologue
1804 moves it to a different place.
1806 If the incoming location of the structure value address is in a register,
1807 define this macro as the register number. */
1808 /* #define STRUCT_VALUE_INCOMING_REGNUM */
1810 /* If the incoming location is not a register, then you should define
1811 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
1812 function should find the value. If it should find the value on the stack,
1813 define this to create a `mem' which refers to the frame pointer. A
1814 definition of 0 means that the address is passed as an "invisible" first
1816 /* #define STRUCT_VALUE_INCOMING */
1818 /* Define this macro if the usual system convention on the target machine for
1819 returning structures and unions is for the called function to return the
1820 address of a static variable containing the value.
1822 Do not define this if the usual system convention is for the caller to pass
1823 an address to the subroutine.
1825 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
1826 when you use `-freg-struct-return' mode. */
1827 /* #define PCC_STATIC_STRUCT_RETURN */
1830 /* Caller-Saves Register Allocation */
1832 /* Define this macro if function calls on the target machine do not preserve
1833 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
1834 registers. This macro enables `-fcaller-saves' by default. Eventually that
1835 option will be enabled by default on all machines and both the option and
1836 this macro will be eliminated. */
1837 /* #define DEFAULT_CALLER_SAVES */
1839 /* A C expression to determine whether it is worthwhile to consider placing a
1840 pseudo-register in a call-clobbered hard register and saving and restoring
1841 it around each function call. The expression should be 1 when this is worth
1842 doing, and 0 otherwise.
1844 If you don't define this macro, a default is used which is good on most
1845 machines: `4 * CALLS < REFS'. */
1846 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
1849 /* #define EXIT_IGNORE_STACK */
1851 /* Define this macro as a C expression that is nonzero for registers
1852 are used by the epilogue or the `return' pattern. The stack and
1853 frame pointer registers are already be assumed to be used as
1855 #define EPILOGUE_USES(REGNO) ((REGNO) == GPR_LINK)
1857 /* Define this macro if the function epilogue contains delay slots to which
1858 instructions from the rest of the function can be "moved". The definition
1859 should be a C expression whose value is an integer representing the number
1860 of delay slots there. */
1861 /* #define DELAY_SLOTS_FOR_EPILOGUE */
1863 /* A C expression that returns 1 if INSN can be placed in delay slot number N
1866 The argument N is an integer which identifies the delay slot now being
1867 considered (since different slots may have different rules of eligibility).
1868 It is never negative and is always less than the number of epilogue delay
1869 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
1870 insn for a given delay slot, in principle, it may be reconsidered for a
1871 subsequent delay slot. Also, other insns may (at least in principle) be
1872 considered for the so far unfilled delay slot.
1874 The insns accepted to fill the epilogue delay slots are put in an
1875 RTL list made with `insn_list' objects, stored in the variable
1876 `current_function_epilogue_delay_list'. The insn for the first
1877 delay slot comes first in the list. Your definition of the function
1878 output_function_epilogue() should fill the delay slots by outputting the
1879 insns in this list, usually by calling `final_scan_insn'.
1881 You need not define this macro if you did not define
1882 `DELAY_SLOTS_FOR_EPILOGUE'. */
1883 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
1885 /* A C compound statement that outputs the assembler code for a thunk function,
1886 used to implement C++ virtual function calls with multiple inheritance. The
1887 thunk acts as a wrapper around a virtual function, adjusting the implicit
1888 object parameter before handing control off to the real function.
1890 First, emit code to add the integer DELTA to the location that contains the
1891 incoming first argument. Assume that this argument contains a pointer, and
1892 is the one used to pass the `this' pointer in C++. This is the incoming
1893 argument *before* the function prologue, e.g. `%o0' on a sparc. The
1894 addition must preserve the values of all other incoming arguments.
1896 After the addition, emit code to jump to FUNCTION, which is a
1897 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
1898 the return address. Hence returning from FUNCTION will return to whoever
1899 called the current `thunk'.
1901 The effect must be as if FUNCTION had been called directly with the
1902 adjusted first argument. This macro is responsible for emitting
1903 all of the code for a thunk function; output_function_prologue()
1904 and output_function_epilogue() are not invoked.
1906 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
1907 extracted from it.) It might possibly be useful on some targets, but
1910 If you do not define this macro, the target-independent code in the C++
1911 frontend will generate a less efficient heavyweight thunk that calls
1912 FUNCTION instead of jumping to it. The generic approach does not support
1914 /* #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) */
1916 /* A C structure for machine-specific, per-function data.
1917 This is added to the cfun structure. */
1918 typedef struct machine_function GTY(())
1920 /* Additionsl stack adjustment in __builtin_eh_throw. */
1921 rtx eh_epilogue_sp_ofs;
1925 /* Generating Code for Profiling. */
1927 /* A C statement or compound statement to output to FILE some assembler code to
1928 call the profiling subroutine `mcount'. Before calling, the assembler code
1929 must load the address of a counter variable into a register where `mcount'
1930 expects to find the address. The name of this variable is `LP' followed by
1931 the number LABELNO, so you would generate the name using `LP%d' in a
1934 The details of how the address should be passed to `mcount' are determined
1935 by your operating system environment, not by GNU CC. To figure them out,
1936 compile a small program for profiling using the system's installed C
1937 compiler and look at the assembler code that results. */
1939 #define FUNCTION_PROFILER(FILE, LABELNO) d30v_function_profiler (FILE, LABELNO)
1941 /* Define this macro if the code for function profiling should come before the
1942 function prologue. Normally, the profiling code comes after. */
1943 /* #define PROFILE_BEFORE_PROLOGUE */
1946 /* Implementing the Varargs Macros. */
1948 /* If defined, is a C expression that produces the machine-specific code for a
1949 call to `__builtin_saveregs'. This code will be moved to the very beginning
1950 of the function, before any parameter access are made. The return value of
1951 this function should be an RTX that contains the value to use as the return
1952 of `__builtin_saveregs'.
1954 If this macro is not defined, the compiler will output an ordinary call to
1955 the library function `__builtin_saveregs'. */
1957 #define EXPAND_BUILTIN_SAVEREGS() d30v_expand_builtin_saveregs ()
1959 /* This macro offers an alternative to using `__builtin_saveregs' and defining
1960 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
1961 arguments into the stack so that all the arguments appear to have been
1962 passed consecutively on the stack. Once this is done, you can use the
1963 standard implementation of varargs that works for machines that pass all
1964 their arguments on the stack.
1966 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
1967 the values that obtain after processing of the named arguments. The
1968 arguments MODE and TYPE describe the last named argument--its machine mode
1969 and its data type as a tree node.
1971 The macro implementation should do two things: first, push onto the stack
1972 all the argument registers *not* used for the named arguments, and second,
1973 store the size of the data thus pushed into the `int'-valued variable whose
1974 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
1975 store here will serve as additional offset for setting up the stack frame.
1977 Because you must generate code to push the anonymous arguments at compile
1978 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
1979 useful on machines that have just a single category of argument register and
1980 use it uniformly for all data types.
1982 If the argument SECOND_TIME is nonzero, it means that the arguments of the
1983 function are being analyzed for the second time. This happens for an inline
1984 function, which is not actually compiled until the end of the source file.
1985 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
1988 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
1989 d30v_setup_incoming_varargs (&ARGS_SO_FAR, (int) MODE, TYPE, \
1990 &PRETEND_ARGS_SIZE, SECOND_TIME)
1992 /* Define this macro if the location where a function argument is passed
1993 depends on whether or not it is a named argument.
1995 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
1996 varargs and stdarg functions. With this macro defined, the NAMED argument
1997 is always true for named arguments, and false for unnamed arguments. If
1998 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
1999 arguments are treated as named. Otherwise, all named arguments except the
2000 last are treated as named. */
2001 /* #define STRICT_ARGUMENT_NAMING */
2003 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
2004 defined, it is assumed that va_list is a void * pointer. */
2006 #define BUILD_VA_LIST_TYPE(VALIST) \
2007 (VALIST) = d30v_build_va_list ()
2010 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
2011 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
2012 variable to initialize. NEXTARG is the machine independent notion of the
2013 'next' argument after the variable arguments. If not defined, a standard
2014 implementation will be defined that works for arguments passed on the stack. */
2016 #define EXPAND_BUILTIN_VA_START(VALIST, NEXTARG) \
2017 d30v_expand_builtin_va_start(VALIST, NEXTARG)
2019 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
2020 va_list as a tree, TYPE is the type passed to va_arg. */
2022 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
2023 (d30v_expand_builtin_va_arg (VALIST, TYPE))
2025 /* Implement the stdarg/varargs va_end macro.
2026 VALIST is the variable of type va_list as a tree. */
2028 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
2032 /* Trampolines for Nested Functions. */
2034 /* A C statement to output, on the stream FILE, assembler code for a block of
2035 data that contains the constant parts of a trampoline. This code should not
2036 include a label--the label is taken care of automatically. */
2037 /* #define TRAMPOLINE_TEMPLATE(FILE) d30v_trampoline_template (FILE) */
2039 /* The name of a subroutine to switch to the section in which the trampoline
2040 template is to be placed (*note Sections::.). The default is a value of
2041 `readonly_data_section', which places the trampoline in the section
2042 containing read-only data. */
2043 /* #define TRAMPOLINE_SECTION */
2045 /* A C expression for the size in bytes of the trampoline, as an integer. */
2046 #define TRAMPOLINE_SIZE (d30v_trampoline_size ())
2048 /* Alignment required for trampolines, in bits.
2050 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
2051 aligning trampolines. */
2052 #define TRAMPOLINE_ALIGNMENT 64
2054 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
2055 RTX for the address of the trampoline; FNADDR is an RTX for the address of
2056 the nested function; STATIC_CHAIN is an RTX for the static chain value that
2057 should be passed to the function when it is called. */
2058 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
2059 d30v_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
2061 /* A C expression to allocate run-time space for a trampoline. The expression
2062 value should be an RTX representing a memory reference to the space for the
2065 If this macro is not defined, by default the trampoline is allocated as a
2066 stack slot. This default is right for most machines. The exceptions are
2067 machines where it is impossible to execute instructions in the stack area.
2068 On such machines, you may have to implement a separate stack, using this
2069 macro in conjunction with output_function_prologue () and
2070 output_function_epilogue ().
2072 FP points to a data structure, a `struct function', which describes the
2073 compilation status of the immediate containing function of the function
2074 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
2075 defined), the stack slot for the trampoline is in the stack frame of this
2076 containing function. Other allocation strategies probably must do something
2077 analogous with this information. */
2078 /* #define ALLOCATE_TRAMPOLINE(FP) */
2080 /* Implementing trampolines is difficult on many machines because they have
2081 separate instruction and data caches. Writing into a stack location fails
2082 to clear the memory in the instruction cache, so when the program jumps to
2083 that location, it executes the old contents.
2085 Here are two possible solutions. One is to clear the relevant parts of the
2086 instruction cache whenever a trampoline is set up. The other is to make all
2087 trampolines identical, by having them jump to a standard subroutine. The
2088 former technique makes trampoline execution faster; the latter makes
2089 initialization faster.
2091 To clear the instruction cache when a trampoline is initialized, define the
2092 following macros which describe the shape of the cache. */
2094 /* The total size in bytes of the cache. */
2095 /* #define INSN_CACHE_SIZE */
2097 /* The length in bytes of each cache line. The cache is divided into cache
2098 lines which are disjoint slots, each holding a contiguous chunk of data
2099 fetched from memory. Each time data is brought into the cache, an entire
2100 line is read at once. The data loaded into a cache line is always aligned
2101 on a boundary equal to the line size. */
2102 /* #define INSN_CACHE_LINE_WIDTH */
2104 /* The number of alternative cache lines that can hold any particular memory
2106 /* #define INSN_CACHE_DEPTH */
2108 /* Alternatively, if the machine has system calls or instructions to clear the
2109 instruction cache directly, you can define the following macro. */
2111 /* If defined, expands to a C expression clearing the *instruction cache* in
2112 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
2113 is defined, some generic code is generated to clear the cache. The
2114 definition of this macro would typically be a series of `asm' statements.
2115 Both BEG and END are both pointer expressions. */
2116 /* #define CLEAR_INSN_CACHE (BEG, END) */
2118 /* To use a standard subroutine, define the following macro. In addition, you
2119 must make sure that the instructions in a trampoline fill an entire cache
2120 line with identical instructions, or else ensure that the beginning of the
2121 trampoline code is always aligned at the same point in its cache line. Look
2122 in `m68k.h' as a guide. */
2124 /* Define this macro if trampolines need a special subroutine to do their work.
2125 The macro should expand to a series of `asm' statements which will be
2126 compiled with GNU CC. They go in a library function named
2127 `__transfer_from_trampoline'.
2129 If you need to avoid executing the ordinary prologue code of a compiled C
2130 function when you jump to the subroutine, you can do so by placing a special
2131 label of your own in the assembler code. Use one `asm' statement to
2132 generate an assembler label, and another to make the label global. Then
2133 trampolines can use that label to jump directly to your special assembler
2135 /* #define TRANSFER_FROM_TRAMPOLINE */
2138 /* Implicit Calls to Library Routines */
2140 /* A C string constant giving the name of the function to call for
2141 multiplication of one signed full-word by another. If you do not define
2142 this macro, the default name is used, which is `__mulsi3', a function
2143 defined in `libgcc.a'. */
2144 /* #define MULSI3_LIBCALL */
2146 /* A C string constant giving the name of the function to call for division of
2147 one signed full-word by another. If you do not define this macro, the
2148 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
2149 /* #define DIVSI3_LIBCALL */
2151 /* A C string constant giving the name of the function to call for division of
2152 one unsigned full-word by another. If you do not define this macro, the
2153 default name is used, which is `__udivsi3', a function defined in
2155 /* #define UDIVSI3_LIBCALL */
2157 /* A C string constant giving the name of the function to call for the
2158 remainder in division of one signed full-word by another. If you do not
2159 define this macro, the default name is used, which is `__modsi3', a function
2160 defined in `libgcc.a'. */
2161 /* #define MODSI3_LIBCALL */
2163 /* A C string constant giving the name of the function to call for the
2164 remainder in division of one unsigned full-word by another. If you do not
2165 define this macro, the default name is used, which is `__umodsi3', a
2166 function defined in `libgcc.a'. */
2167 /* #define UMODSI3_LIBCALL */
2169 /* A C string constant giving the name of the function to call for
2170 multiplication of one signed double-word by another. If you do not define
2171 this macro, the default name is used, which is `__muldi3', a function
2172 defined in `libgcc.a'. */
2173 /* #define MULDI3_LIBCALL */
2175 /* A C string constant giving the name of the function to call for division of
2176 one signed double-word by another. If you do not define this macro, the
2177 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
2178 /* #define DIVDI3_LIBCALL */
2180 /* A C string constant giving the name of the function to call for division of
2181 one unsigned full-word by another. If you do not define this macro, the
2182 default name is used, which is `__udivdi3', a function defined in
2184 /* #define UDIVDI3_LIBCALL */
2186 /* A C string constant giving the name of the function to call for the
2187 remainder in division of one signed double-word by another. If you do not
2188 define this macro, the default name is used, which is `__moddi3', a function
2189 defined in `libgcc.a'. */
2190 /* #define MODDI3_LIBCALL */
2192 /* A C string constant giving the name of the function to call for the
2193 remainder in division of one unsigned full-word by another. If you do not
2194 define this macro, the default name is used, which is `__umoddi3', a
2195 function defined in `libgcc.a'. */
2196 /* #define UMODDI3_LIBCALL */
2198 /* Define this macro as a C statement that declares additional library routines
2199 renames existing ones. `init_optabs' calls this macro after initializing all
2200 the normal library routines. */
2201 /* #define INIT_TARGET_OPTABS */
2203 /* The value of `EDOM' on the target machine, as a C integer constant
2204 expression. If you don't define this macro, GNU CC does not attempt to
2205 deposit the value of `EDOM' into `errno' directly. Look in
2206 `/usr/include/errno.h' to find the value of `EDOM' on your system.
2208 If you do not define `TARGET_EDOM', then compiled code reports domain errors
2209 by calling the library function and letting it report the error. If
2210 mathematical functions on your system use `matherr' when there is an error,
2211 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
2213 /* #define TARGET_EDOM */
2215 /* Define this macro as a C expression to create an rtl expression that refers
2216 to the global "variable" `errno'. (On certain systems, `errno' may not
2217 actually be a variable.) If you don't define this macro, a reasonable
2219 /* #define GEN_ERRNO_RTX */
2221 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
2222 C) library functions `memcpy' and `memset' rather than the BSD functions
2223 `bcopy' and `bzero'.
2225 Defined in svr4.h. */
2226 /* #define TARGET_MEM_FUNCTIONS */
2228 /* Define this macro to generate code for Objective C message sending using the
2229 calling convention of the NeXT system. This calling convention involves
2230 passing the object, the selector and the method arguments all at once to the
2231 method-lookup library function.
2233 The default calling convention passes just the object and the selector to
2234 the lookup function, which returns a pointer to the method. */
2235 /* #define NEXT_OBJC_RUNTIME */
2238 /* Addressing Modes */
2240 /* Define this macro if the machine supports post-increment addressing. */
2241 #define HAVE_POST_INCREMENT 1
2243 /* Similar for other kinds of addressing. */
2244 /* #define HAVE_PRE_INCREMENT 0 */
2245 #define HAVE_POST_DECREMENT 1
2246 /* #define HAVE_PRE_DECREMENT 0 */
2248 /* A C expression that is 1 if the RTX X is a constant which is a valid
2249 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
2250 few machines are more restrictive in which constant addresses are supported.
2252 `CONSTANT_P' accepts integer-values expressions whose values are not
2253 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
2254 and `const' arithmetic expressions, in addition to `const_int' and
2255 `const_double' expressions. */
2256 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
2258 /* A number, the maximum number of registers that can appear in a valid memory
2259 address. Note that it is up to you to specify a value equal to the maximum
2260 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
2261 #define MAX_REGS_PER_ADDRESS 2
2263 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
2264 RTX) is a legitimate memory address on the target machine for a memory
2265 operand of mode MODE. */
2267 #ifdef REG_OK_STRICT
2268 #define REG_OK_STRICT_P 1
2270 #define REG_OK_STRICT_P 0
2273 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2275 if (d30v_legitimate_address_p ((int)MODE, X, REG_OK_STRICT_P)) \
2279 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
2280 use as a base register. For hard registers, it should always accept those
2281 which the hardware permits and reject the others. Whether the macro accepts
2282 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
2283 described above. This usually requires two variant definitions, of which
2284 `REG_OK_STRICT' controls the one actually used. */
2286 #ifdef REG_OK_STRICT
2287 #define REG_OK_FOR_BASE_P(X) (GPR_P (REGNO (X)))
2289 #define REG_OK_FOR_BASE_P(X) (GPR_OR_PSEUDO_P (REGNO (X)))
2292 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
2293 use as an index register.
2295 The difference between an index register and a base register is that the
2296 index register may be scaled. If an address involves the sum of two
2297 registers, neither one of them scaled, then either one may be labeled the
2298 "base" and the other the "index"; but whichever labeling is used must fit
2299 the machine's constraints of which registers may serve in each capacity.
2300 The compiler will try both labelings, looking for one that is valid, and
2301 will reload one or both registers only if neither labeling works. */
2303 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
2305 /* A C compound statement that attempts to replace X with a valid memory
2306 address for an operand of mode MODE. WIN will be a C statement label
2307 elsewhere in the code; the macro definition may use
2309 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
2311 to avoid further processing if the address has become legitimate.
2313 X will always be the result of a call to `break_out_memory_refs', and OLDX
2314 will be the operand that was given to that function to produce X.
2316 The code generated by this macro should not alter the substructure of X. If
2317 it transforms X into a more legitimate form, it should assign X (which will
2318 always be a C variable) a new value.
2320 It is not necessary for this macro to come up with a legitimate address.
2321 The compiler has standard ways of doing so in all cases. In fact, it is
2322 safe for this macro to do nothing. But often a machine-dependent strategy
2323 can generate better code. */
2325 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2327 rtx y = d30v_legitimize_address (X, OLDX, (int)MODE, REG_OK_STRICT_P); \
2331 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); \
2335 /* A C statement or compound statement with a conditional `goto LABEL;'
2336 executed if memory address X (an RTX) can have different meanings depending
2337 on the machine mode of the memory reference it is used for or if the address
2338 is valid for some modes but not others.
2340 Autoincrement and autodecrement addresses typically have mode-dependent
2341 effects because the amount of the increment or decrement is the size of the
2342 operand being addressed. Some machines have other mode-dependent addresses.
2343 Many RISC machines have no mode-dependent addresses.
2345 You may assume that ADDR is a valid address for the machine. */
2347 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2349 if (d30v_mode_dependent_address_p (ADDR)) \
2353 /* A C expression that is nonzero if X is a legitimate constant for an
2354 immediate operand on the target machine. You can assume that X satisfies
2355 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
2356 definition for this macro on machines where anything `CONSTANT_P' is valid. */
2357 #define LEGITIMATE_CONSTANT_P(X) 1
2360 /* Condition Code Status */
2362 /* C code for a data type which is used for declaring the `mdep' component of
2363 `cc_status'. It defaults to `int'.
2365 This macro is not used on machines that do not use `cc0'. */
2366 /* #define CC_STATUS_MDEP */
2368 /* A C expression to initialize the `mdep' field to "empty". The default
2369 definition does nothing, since most machines don't use the field anyway. If
2370 you want to use the field, you should probably define this macro to
2373 This macro is not used on machines that do not use `cc0'. */
2374 /* #define CC_STATUS_MDEP_INIT */
2376 /* A C compound statement to set the components of `cc_status' appropriately
2377 for an insn INSN whose body is EXP. It is this macro's responsibility to
2378 recognize insns that set the condition code as a byproduct of other activity
2379 as well as those that explicitly set `(cc0)'.
2381 This macro is not used on machines that do not use `cc0'.
2383 If there are insns that do not set the condition code but do alter other
2384 machine registers, this macro must check to see whether they invalidate the
2385 expressions that the condition code is recorded as reflecting. For example,
2386 on the 68000, insns that store in address registers do not set the condition
2387 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
2388 unaltered for such insns. But suppose that the previous insn set the
2389 condition code based on location `a4@(102)' and the current insn stores a
2390 new value in `a4'. Although the condition code is not changed by this, it
2391 will no longer be true that it reflects the contents of `a4@(102)'.
2392 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
2393 that nothing is known about the condition code value.
2395 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
2396 results of peephole optimization: insns whose patterns are `parallel' RTXs
2397 containing various `reg', `mem' or constants which are just the operands.
2398 The RTL structure of these insns is not sufficient to indicate what the
2399 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
2400 just to run `CC_STATUS_INIT'.
2402 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
2403 at an attribute (*note Insn Attributes::.) named, for example, `cc'. This
2404 avoids having detailed information about patterns in two places, the `md'
2405 file and in `NOTICE_UPDATE_CC'. */
2406 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
2408 /* A list of names to be used for additional modes for condition code values in
2409 registers (*note Jump Patterns::.). These names are added to `enum
2410 machine_mode' and all have class `MODE_CC'. By convention, they should
2411 start with `CC' and end with `mode'.
2413 You should only define this macro if your machine does not use `cc0' and
2414 only if additional modes are required. */
2415 /* #define EXTRA_CC_MODES */
2417 /* Returns a mode from class `MODE_CC' to be used when comparison operation
2418 code OP is applied to rtx X and Y. For example, on the Sparc,
2419 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
2420 description of the reason for this definition)
2422 #define SELECT_CC_MODE(OP,X,Y) \
2423 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
2424 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
2425 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
2426 || GET_CODE (X) == NEG) \
2427 ? CC_NOOVmode : CCmode))
2429 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
2430 /* #define SELECT_CC_MODE(OP, X, Y) */
2432 /* One some machines not all possible comparisons are defined, but you can
2433 convert an invalid comparison into a valid one. For example, the Alpha does
2434 not have a `GT' comparison, but you can use an `LT' comparison instead and
2435 swap the order of the operands.
2437 On such machines, define this macro to be a C statement to do any required
2438 conversions. CODE is the initial comparison code and OP0 and OP1 are the
2439 left and right operands of the comparison, respectively. You should modify
2440 CODE, OP0, and OP1 as required.
2442 GNU CC will not assume that the comparison resulting from this macro is
2443 valid but will see if the resulting insn matches a pattern in the `md' file.
2445 You need not define this macro if it would never change the comparison code
2447 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
2449 /* A C expression whose value is one if it is always safe to reverse a
2450 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
2451 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
2454 You need not define this macro if it would always returns zero or if the
2455 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
2456 example, here is the definition used on the Sparc, where floating-point
2457 inequality comparisons are always given `CCFPEmode':
2459 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
2460 /* #define REVERSIBLE_CC_MODE(MODE) */
2463 /* Describing Relative Costs of Operations */
2465 /* A part of a C `switch' statement that describes the relative costs of
2466 constant RTL expressions. It must contain `case' labels for expression
2467 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
2468 Each case must ultimately reach a `return' statement to return the relative
2469 cost of the use of that kind of constant value in an expression. The cost
2470 may depend on the precise value of the constant, which is available for
2471 examination in X, and the rtx code of the expression in which it is
2472 contained, found in OUTER_CODE.
2474 CODE is the expression code--redundant, since it can be obtained with
2477 /* On the d30v, consider operatnds that fit in a short instruction very
2478 cheap. However, at this time, it causes cse to generate incorrect
2479 code, so disable it for now. */
2481 #define CONST_COSTS(X, CODE, OUTER_CODE) \
2483 if (IN_RANGE_P (INTVAL (X), 0, 31)) \
2485 else if ((OUTER_CODE) == LEU && (OUTER_CODE) == LTU \
2486 && (OUTER_CODE) == GEU && (OUTER_CODE) == GTU) \
2487 return IN_RANGE_P (INTVAL (X), 32, 63) ? 0 : COSTS_N_INSNS (2); \
2489 return IN_RANGE_P (INTVAL (X), -31, -1) ? 0 : COSTS_N_INSNS (2); \
2493 return COSTS_N_INSNS (2); \
2494 case CONST_DOUBLE: \
2495 return COSTS_N_INSNS ((GET_MODE (X) == SFmode) ? 2 : 4);
2497 #define CONST_COSTS(X, CODE, OUTER_CODE)
2500 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
2501 used, for example, to indicate how costly a multiply instruction is. In
2502 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
2503 a cost equal to N fast instructions. OUTER_CODE is the code of the
2504 expression in which X is contained.
2506 This macro is optional; do not define it if the default cost assumptions are
2507 adequate for the target machine. */
2508 #define RTX_COSTS(X, CODE, OUTER_CODE) \
2510 return COSTS_N_INSNS ((GET_CODE (XEXP (x, 1)) == CONST_INT \
2511 && exact_log2 (INTVAL (XEXP (x, 1))) >= 0) \
2514 /* An expression giving the cost of an addressing mode that contains ADDRESS.
2515 If not defined, the cost is computed from the ADDRESS expression and the
2516 `CONST_COSTS' values.
2518 For most CISC machines, the default cost is a good approximation of the true
2519 cost of the addressing mode. However, on RISC machines, all instructions
2520 normally have the same length and execution time. Hence all addresses will
2523 In cases where more than one form of an address is known, the form with the
2524 lowest cost will be used. If multiple forms have the same, lowest, cost,
2525 the one that is the most complex will be used.
2527 For example, suppose an address that is equal to the sum of a register and a
2528 constant is used twice in the same basic block. When this macro is not
2529 defined, the address will be computed in a register and memory references
2530 will be indirect through that register. On machines where the cost of the
2531 addressing mode containing the sum is no higher than that of a simple
2532 indirect reference, this will produce an additional instruction and possibly
2533 require an additional register. Proper specification of this macro
2534 eliminates this overhead for such machines.
2536 Similar use of this macro is made in strength reduction of loops.
2538 ADDRESS need not be valid as an address. In such a case, the cost is not
2539 relevant and can be any value; invalid addresses need not be assigned a
2542 On machines where an address involving more than one register is as cheap as
2543 an address computation involving only one register, defining `ADDRESS_COST'
2544 to reflect this can cause two registers to be live over a region of code
2545 where only one would have been if `ADDRESS_COST' were not defined in that
2546 manner. This effect should be considered in the definition of this macro.
2547 Equivalent costs should probably only be given to addresses with different
2548 numbers of registers on machines with lots of registers.
2550 This macro will normally either not be defined or be defined as a constant. */
2551 #define ADDRESS_COST(ADDRESS) 0
2553 /* A C expression for the cost of moving data from a register in class FROM to
2554 one in class TO. The classes are expressed using the enumeration values
2555 such as `GENERAL_REGS'. A value of 4 is the default; other values are
2556 interpreted relative to that.
2558 It is not required that the cost always equal 2 when FROM is the same as TO;
2559 on some machines it is expensive to move between registers if they are not
2562 If reload sees an insn consisting of a single `set' between two hard
2563 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
2564 value of 2, reload does not check to ensure that the constraints of the insn
2565 are met. Setting a cost of other than 2 will allow reload to verify that
2566 the constraints are met. You should do this if the `movM' pattern's
2567 constraints do not allow such copying. */
2569 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
2570 (((FROM) != GPR_REGS && (FROM) != EVEN_REGS \
2571 && (TO) != GPR_REGS && (TO) != EVEN_REGS) ? 4 : 2)
2573 /* A C expression for the cost of moving data of mode M between a register and
2574 memory. A value of 2 is the default; this cost is relative to those in
2575 `REGISTER_MOVE_COST'.
2577 If moving between registers and memory is more expensive than between two
2578 registers, you should define this macro to express the relative cost. */
2579 #define MEMORY_MOVE_COST(M,C,I) 4
2581 /* A C expression for the cost of a branch instruction. A value of 1 is the
2582 default; other values are interpreted relative to that. */
2584 #define BRANCH_COST d30v_branch_cost
2586 #define D30V_DEFAULT_BRANCH_COST 2
2588 /* Values of the -mbranch-cost=n string. */
2589 extern int d30v_branch_cost;
2590 extern const char *d30v_branch_cost_string;
2592 /* Here are additional macros which do not specify precise relative costs, but
2593 only that certain actions are more expensive than GNU CC would ordinarily
2596 /* Define this macro as a C expression which is nonzero if accessing less than
2597 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
2598 word of memory, i.e., if such access require more than one instruction or if
2599 there is no difference in cost between byte and (aligned) word loads.
2601 When this macro is not defined, the compiler will access a field by finding
2602 the smallest containing object; when it is defined, a fullword load will be
2603 used if alignment permits. Unless bytes accesses are faster than word
2604 accesses, using word accesses is preferable since it may eliminate
2605 subsequent memory access if subsequent accesses occur to other fields in the
2606 same word of the structure, but to different bytes. */
2607 #define SLOW_BYTE_ACCESS 1
2609 /* Define this macro to be the value 1 if unaligned accesses have a cost many
2610 times greater than aligned accesses, for example if they are emulated in a
2613 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
2614 were non-zero when generating code for block moves. This can cause
2615 significantly more instructions to be produced. Therefore, do not set this
2616 macro non-zero if unaligned accesses only add a cycle or two to the time for
2619 If the value of this macro is always zero, it need not be defined. */
2620 /* #define SLOW_UNALIGNED_ACCESS */
2622 /* Define this macro to inhibit strength reduction of memory addresses. (On
2623 some machines, such strength reduction seems to do harm rather than good.) */
2624 /* #define DONT_REDUCE_ADDR */
2626 /* The number of scalar move insns which should be generated instead of a
2627 string move insn or a library call. Increasing the value will always make
2628 code faster, but eventually incurs high cost in increased code size.
2630 If you don't define this, a reasonable default is used. */
2631 /* #define MOVE_RATIO */
2633 /* Define this macro if it is as good or better to call a constant function
2634 address than to call an address kept in a register. */
2635 #define NO_FUNCTION_CSE
2637 /* Define this macro if it is as good or better for a function to call itself
2638 with an explicit address than to call an address kept in a register. */
2639 /* #define NO_RECURSIVE_FUNCTION_CSE */
2642 /* Dividing the output into sections. */
2644 /* A C expression whose value is a string containing the assembler operation
2645 that should precede instructions and read-only data. Normally `".text"' is
2647 #define TEXT_SECTION_ASM_OP "\t.text"
2649 /* A C expression whose value is a string containing the assembler operation to
2650 identify the following data as writable initialized data. Normally
2651 `".data"' is right. */
2652 #define DATA_SECTION_ASM_OP "\t.data"
2654 /* if defined, a C expression whose value is a string containing the assembler
2655 operation to identify the following data as shared data. If not defined,
2656 `DATA_SECTION_ASM_OP' will be used. */
2657 /* #define SHARED_SECTION_ASM_OP */
2659 /* If defined, a C expression whose value is a string containing the
2660 assembler operation to identify the following data as
2661 uninitialized global data. If not defined, and neither
2662 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
2663 uninitialized global data will be output in the data section if
2664 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
2666 #define BSS_SECTION_ASM_OP "\t.section .bss"
2668 /* If defined, a C expression whose value is a string containing the
2669 assembler operation to identify the following data as
2670 uninitialized global shared data. If not defined, and
2671 `BSS_SECTION_ASM_OP' is, the latter will be used. */
2672 /* #define SHARED_BSS_SECTION_ASM_OP */
2674 /* A list of names for sections other than the standard two, which are
2675 `in_text' and `in_data'. You need not define this macro on a system with no
2676 other sections (that GCC needs to use).
2678 Defined in svr4.h. */
2679 /* #define EXTRA_SECTIONS */
2681 /* One or more functions to be defined in `varasm.c'. These functions should
2682 do jobs analogous to those of `text_section' and `data_section', for your
2683 additional sections. Do not define this macro if you do not define
2686 Defined in svr4.h. */
2687 /* #define EXTRA_SECTION_FUNCTIONS */
2689 /* Define this macro if jump tables (for `tablejump' insns) should be output in
2690 the text section, along with the assembler instructions. Otherwise, the
2691 readonly data section is used.
2693 This macro is irrelevant if there is no separate readonly data section. */
2694 /* #define JUMP_TABLES_IN_TEXT_SECTION */
2696 /* Position Independent Code. */
2698 /* The register number of the register used to address a table of static data
2699 addresses in memory. In some cases this register is defined by a
2700 processor's "application binary interface" (ABI). When this macro is
2701 defined, RTL is generated for this register once, as with the stack pointer
2702 and frame pointer registers. If this macro is not defined, it is up to the
2703 machine-dependent files to allocate such a register (if necessary). */
2704 /* #define PIC_OFFSET_TABLE_REGNUM */
2706 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
2707 clobbered by calls. Do not define this macro if `PIC_OFFSET_TABLE_REGNUM'
2709 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
2711 /* By generating position-independent code, when two different programs (A and
2712 B) share a common library (libC.a), the text of the library can be shared
2713 whether or not the library is linked at the same address for both programs.
2714 In some of these environments, position-independent code requires not only
2715 the use of different addressing modes, but also special code to enable the
2716 use of these addressing modes.
2718 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
2719 the function is being compiled into assembly code, but not before. (It is
2720 not done before, because in the case of compiling an inline function, it
2721 would lead to multiple PIC prologues being included in functions which used
2722 inline functions and were compiled to assembly language.) */
2723 /* #define FINALIZE_PIC */
2725 /* A C expression that is nonzero if X is a legitimate immediate operand on the
2726 target machine when generating position independent code. You can assume
2727 that X satisfies `CONSTANT_P', so you need not check this. You can also
2728 assume FLAG_PIC is true, so you need not check it either. You need not
2729 define this macro if all constants (including `SYMBOL_REF') can be immediate
2730 operands when generating position independent code. */
2731 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
2734 /* The Overall Framework of an Assembler File. */
2736 /* A C expression which outputs to the stdio stream STREAM some appropriate
2737 text to go at the start of an assembler file.
2739 Normally this macro is defined to output a line containing `#NO_APP', which
2740 is a comment that has no effect on most assemblers but tells the GNU
2741 assembler that it can save time by not checking for certain assembler
2744 On systems that use SDB, it is necessary to output certain commands; see
2747 Defined in svr4.h. */
2749 /* #define ASM_FILE_START(STREAM) \
2750 output_file_directive ((STREAM), main_input_filename) */
2752 /* A C expression which outputs to the stdio stream STREAM some appropriate
2753 text to go at the end of an assembler file.
2755 If this macro is not defined, the default is to output nothing special at
2756 the end of the file. Most systems don't require any definition.
2758 On systems that use SDB, it is necessary to output certain commands; see
2761 Defined in svr4.h. */
2762 /* #define ASM_FILE_END(STREAM) */
2764 /* A C string constant describing how to begin a comment in the target
2765 assembler language. The compiler assumes that the comment will end at the
2767 #define ASM_COMMENT_START ";"
2769 /* A C string constant for text to be output before each `asm' statement or
2770 group of consecutive ones. Normally this is `"#APP"', which is a comment
2771 that has no effect on most assemblers but tells the GNU assembler that it
2772 must check the lines that follow for all valid assembler constructs. */
2773 #define ASM_APP_ON "#APP\n"
2775 /* A C string constant for text to be output after each `asm' statement or
2776 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
2777 GNU assembler to resume making the time-saving assumptions that are valid
2778 for ordinary compiler output. */
2779 #define ASM_APP_OFF "#NO_APP\n"
2781 /* A C statement to output COFF information or DWARF debugging information
2782 which indicates that filename NAME is the current source file to the stdio
2785 This macro need not be defined if the standard form of output for the file
2786 format in use is appropriate. */
2787 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
2789 /* A C statement to output DBX or SDB debugging information before code for
2790 line number LINE of the current source file to the stdio stream STREAM.
2792 This macro need not be defined if the standard form of debugging information
2793 for the debugger in use is appropriate.
2795 Defined in svr4.h. */
2796 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
2798 /* A C statement to output something to the assembler file to handle a `#ident'
2799 directive containing the text STRING. If this macro is not defined, nothing
2800 is output for a `#ident' directive.
2802 Defined in svr4.h. */
2803 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
2805 /* A C statement to output any assembler statements which are required to
2806 precede any Objective C object definitions or message sending. The
2807 statement is executed only when compiling an Objective C program. */
2808 /* #define OBJC_PROLOGUE */
2811 /* Output of Data. */
2813 /* A C statement to output to the stdio stream STREAM an assembler instruction
2814 to assemble a string constant containing the LEN bytes at PTR. PTR will be
2815 a C expression of type `char *' and LEN a C expression of type `int'.
2817 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
2818 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
2820 Defined in svr4.h. */
2821 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
2823 /* You may define this macro as a C expression. You should define the
2824 expression to have a non-zero value if GNU CC should output the
2825 constant pool for a function before the code for the function, or
2826 a zero value if GNU CC should output the constant pool after the
2827 function. If you do not define this macro, the usual case, GNU CC
2828 will output the constant pool before the function. */
2829 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
2831 /* A C statement to output assembler commands to define the start of the
2832 constant pool for a function. FUNNAME is a string giving the name of the
2833 function. Should the return type of the function be required, it can be
2834 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
2835 will be written immediately after this call.
2837 If no constant-pool prefix is required, the usual case, this macro need not
2839 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
2841 /* A C statement (with or without semicolon) to output a constant in the
2842 constant pool, if it needs special treatment. (This macro need not do
2843 anything for RTL expressions that can be output normally.)
2845 The argument FILE is the standard I/O stream to output the assembler code
2846 on. X is the RTL expression for the constant to output, and MODE is the
2847 machine mode (in case X is a `const_int'). ALIGN is the required alignment
2848 for the value X; you should output an assembler directive to force this much
2851 The argument LABELNO is a number to use in an internal label for the address
2852 of this pool entry. The definition of this macro is responsible for
2853 outputting the label definition at the proper place. Here is how to do
2856 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
2858 When you output a pool entry specially, you should end with a `goto' to the
2859 label JUMPTO. This will prevent the same pool entry from being output a
2860 second time in the usual manner.
2862 You need not define this macro if it would do nothing. */
2863 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
2865 /* Define this macro as a C expression which is nonzero if the constant EXP, of
2866 type `tree', should be output after the code for a function. The compiler
2867 will normally output all constants before the function; you need not define
2868 this macro if this is OK. */
2869 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
2871 /* A C statement to output assembler commands to at the end of the constant
2872 pool for a function. FUNNAME is a string giving the name of the function.
2873 Should the return type of the function be required, you can obtain it via
2874 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
2875 immediately before this call.
2877 If no constant-pool epilogue is required, the usual case, you need not
2878 define this macro. */
2879 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
2881 /* Define this macro as a C expression which is nonzero if C is used as a
2882 logical line separator by the assembler.
2884 If you do not define this macro, the default is that only the character `;'
2885 is treated as a logical line separator. */
2886 /* #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) */
2888 /* These macros are provided by `real.h' for writing the definitions of
2889 `ASM_OUTPUT_DOUBLE' and the like: */
2892 /* Output of Uninitialized Variables. */
2894 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
2895 assembler definition of a common-label named NAME whose size is SIZE bytes.
2896 The variable ROUNDED is the size rounded up to whatever alignment the caller
2899 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
2900 before and after that, output the additional assembler syntax for defining
2901 the name, and a newline.
2903 This macro controls how the assembler definitions of uninitialized global
2904 variables are output. */
2905 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
2907 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
2908 explicit argument. If you define this macro, it is used in place of
2909 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
2910 alignment of the variable. The alignment is specified as the number of
2913 Defined in svr4.h. */
2914 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
2916 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
2917 the DECL of the variable to be output, if there is one. This macro can be
2918 called with DECL == NULL_TREE. If you define this macro, it is used in
2919 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
2920 more flexibility in handling the destination of the variable. */
2921 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
2923 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
2924 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
2925 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
2927 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
2928 assembler definition of uninitialized global DECL named NAME whose size is
2929 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
2930 alignment the caller wants.
2932 Try to use function `asm_output_bss' defined in `varasm.c' when defining
2933 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
2934 output the name itself; before and after that, output the additional
2935 assembler syntax for defining the name, and a newline.
2937 This macro controls how the assembler definitions of uninitialized global
2938 variables are output. This macro exists to properly support languages like
2939 `c++' which do not have `common' data. However, this macro currently is not
2940 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
2941 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
2942 `ASM_OUTPUT_DECL_COMMON' is used. */
2943 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
2945 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
2946 explicit argument. If you define this macro, it is used in place of
2947 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
2948 alignment of the variable. The alignment is specified as the number of
2951 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
2952 defining this macro. */
2953 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
2955 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
2956 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
2957 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
2959 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
2960 assembler definition of a local-common-label named NAME whose size is SIZE
2961 bytes. The variable ROUNDED is the size rounded up to whatever alignment
2964 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
2965 before and after that, output the additional assembler syntax for defining
2966 the name, and a newline.
2968 This macro controls how the assembler definitions of uninitialized static
2969 variables are output. */
2970 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
2972 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
2973 explicit argument. If you define this macro, it is used in place of
2974 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
2975 alignment of the variable. The alignment is specified as the number of
2978 Defined in svr4.h. */
2979 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
2981 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
2982 parameter - the DECL of variable to be output, if there is one.
2983 This macro can be called with DECL == NULL_TREE. If you define
2984 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
2985 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
2986 handling the destination of the variable. */
2987 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
2989 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
2990 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
2991 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
2994 /* Output and Generation of Labels. */
2996 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
2997 necessary for declaring the name NAME of a function which is being defined.
2998 This macro is responsible for outputting the label definition (perhaps using
2999 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
3000 representing the function.
3002 If this macro is not defined, then the function name is defined in the usual
3003 manner as a label (by means of `ASM_OUTPUT_LABEL').
3005 Defined in svr4.h. */
3006 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
3008 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3009 necessary for declaring the size of a function which is being defined. The
3010 argument NAME is the name of the function. The argument DECL is the
3011 `FUNCTION_DECL' tree node representing the function.
3013 If this macro is not defined, then the function size is not defined.
3015 Defined in svr4.h. */
3016 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
3018 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3019 necessary for declaring the name NAME of an initialized variable which is
3020 being defined. This macro must output the label definition (perhaps using
3021 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
3022 representing the variable.
3024 If this macro is not defined, then the variable name is defined in the usual
3025 manner as a label (by means of `ASM_OUTPUT_LABEL').
3027 Defined in svr4.h. */
3028 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
3030 /* A C statement (sans semicolon) to finish up declaring a variable name once
3031 the compiler has processed its initializer fully and thus has had a chance
3032 to determine the size of an array when controlled by an initializer. This
3033 is used on systems where it's necessary to declare something about the size
3036 If you don't define this macro, that is equivalent to defining it to do
3039 Defined in svr4.h. */
3040 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
3042 /* Globalizing directive for a label. */
3043 #define GLOBAL_ASM_OP "\t.globl "
3045 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
3046 commands that will make the label NAME weak; that is, available for
3047 reference from other files but only used if no other definition is
3048 available. Use the expression `assemble_name (STREAM, NAME)' to output the
3049 name itself; before and after that, output the additional assembler syntax
3050 for making that name weak, and a newline.
3052 If you don't define this macro, GNU CC will not support weak symbols and you
3053 should not define the `SUPPORTS_WEAK' macro.
3055 Defined in svr4.h. */
3056 /* #define ASM_WEAKEN_LABEL */
3058 /* A C expression which evaluates to true if the target supports weak symbols.
3060 If you don't define this macro, `defaults.h' provides a default definition.
3061 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
3062 it is `0'. Define this macro if you want to control weak symbol support
3063 with a compiler flag such as `-melf'. */
3064 /* #define SUPPORTS_WEAK */
3066 /* A C statement (sans semicolon) to mark DECL to be emitted as a
3067 public symbol such that extra copies in multiple translation units
3068 will be discarded by the linker. Define this macro if your object
3069 file format provides support for this concept, such as the `COMDAT'
3070 section flags in the Microsoft Windows PE/COFF format, and this
3071 support requires changes to DECL, such as putting it in a separate
3074 Defined in svr4.h. */
3075 /* #define MAKE_DECL_ONE_ONLY */
3077 /* A C expression which evaluates to true if the target supports one-only
3080 If you don't define this macro, `varasm.c' provides a default definition.
3081 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
3082 otherwise, it is `0'. Define this macro if you want to control one-only
3083 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
3084 is enough to mark a declaration to be emitted as one-only. */
3085 /* #define SUPPORTS_ONE_ONLY */
3087 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3088 necessary for declaring the name of an external symbol named NAME which is
3089 referenced in this compilation but not defined. The value of DECL is the
3090 tree node for the declaration.
3092 This macro need not be defined if it does not need to output anything. The
3093 GNU assembler and most Unix assemblers don't require anything. */
3094 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
3096 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
3097 declare a library function name external. The name of the library function
3098 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
3100 This macro need not be defined if it does not need to output anything. The
3101 GNU assembler and most Unix assemblers don't require anything.
3103 Defined in svr4.h. */
3104 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
3106 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
3107 reference in assembler syntax to a label named NAME. This should add `_' to
3108 the front of the name, if that is customary on your operating system, as it
3109 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
3110 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
3112 /* A C statement to output to the stdio stream STREAM a label whose name is
3113 made from the string PREFIX and the number NUM.
3115 It is absolutely essential that these labels be distinct from the labels
3116 used for user-level functions and variables. Otherwise, certain programs
3117 will have name conflicts with internal labels.
3119 It is desirable to exclude internal labels from the symbol table of the
3120 object file. Most assemblers have a naming convention for labels that
3121 should be excluded; on many systems, the letter `L' at the beginning of a
3122 label has this effect. You should find out what convention your system
3123 uses, and follow it.
3125 The usual definition of this macro is as follows:
3127 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
3129 Defined in svr4.h. */
3130 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
3132 /* A C statement to store into the string STRING a label whose name is made
3133 from the string PREFIX and the number NUM.
3135 This string, when output subsequently by `assemble_name', should produce the
3136 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
3139 If the string begins with `*', then `assemble_name' will output the rest of
3140 the string unchanged. It is often convenient for
3141 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
3142 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
3143 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
3144 machine description, so you should know what it does on your machine.)
3146 Defined in svr4.h. */
3149 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
3151 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
3155 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
3156 newly allocated string made from the string NAME and the number NUMBER, with
3157 some suitable punctuation added. Use `alloca' to get space for the string.
3159 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
3160 an assembler label for an internal static variable whose name is NAME.
3161 Therefore, the string must be such as to result in valid assembler code.
3162 The argument NUMBER is different each time this macro is executed; it
3163 prevents conflicts between similarly-named internal static variables in
3166 Ideally this string should not be a valid C identifier, to prevent any
3167 conflict with the user's own symbols. Most assemblers allow periods or
3168 percent signs in assembler symbols; putting at least one of these between
3169 the name and the number will suffice. */
3171 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
3173 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
3174 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
3177 /* A C statement to output to the stdio stream STREAM assembler code which
3178 defines (equates) the symbol NAME to have the value VALUE.
3180 If SET_ASM_OP is defined, a default definition is provided which is correct
3183 Defined in svr4.h. */
3184 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
3186 /* A C statement to output to the stdio stream STREAM assembler code which
3187 defines (equates) the weak symbol NAME to have the value VALUE.
3189 Define this macro if the target only supports weak aliases; define
3190 ASM_OUTPUT_DEF instead if possible. */
3191 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
3193 /* Define this macro to override the default assembler names used for Objective
3196 The default name is a unique method number followed by the name of the class
3197 (e.g. `_1_Foo'). For methods in categories, the name of the category is
3198 also included in the assembler name (e.g. `_1_Foo_Bar').
3200 These names are safe on most systems, but make debugging difficult since the
3201 method's selector is not present in the name. Therefore, particular systems
3202 define other ways of computing names.
3204 BUF is an expression of type `char *' which gives you a buffer in which to
3205 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
3206 put together, plus 50 characters extra.
3208 The argument IS_INST specifies whether the method is an instance method or a
3209 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
3210 the category (or NULL if the method is not in a category); and SEL_NAME is
3211 the name of the selector.
3213 On systems where the assembler can handle quoted names, you can use this
3214 macro to provide more human-readable names. */
3215 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
3218 /* Macros Controlling Initialization Routines. */
3220 /* If defined, a C string constant for the assembler operation to identify the
3221 following data as initialization code. If not defined, GNU CC will assume
3222 such a section does not exist. When you are using special sections for
3223 initialization and termination functions, this macro also controls how
3224 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
3226 Defined in svr4.h. */
3227 /* #define INIT_SECTION_ASM_OP */
3229 /* If defined, `main' will not call `__main' as described above. This macro
3230 should be defined for systems that control the contents of the init section
3231 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
3232 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
3233 /* #define HAS_INIT_SECTION */
3235 /* If defined, a C string constant for a switch that tells the linker that the
3236 following symbol is an initialization routine. */
3237 /* #define LD_INIT_SWITCH */
3239 /* If defined, a C string constant for a switch that tells the linker that the
3240 following symbol is a finalization routine. */
3241 /* #define LD_FINI_SWITCH */
3243 /* If defined, `main' will call `__main' despite the presence of
3244 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
3245 init section is not actually run automatically, but is still useful for
3246 collecting the lists of constructors and destructors. */
3247 #define INVOKE__main
3249 /* If your system uses `collect2' as the means of processing constructors, then
3250 that program normally uses `nm' to scan an object file for constructor
3251 functions to be called. On certain kinds of systems, you can define these
3252 macros to make `collect2' work faster (and, in some cases, make it work at
3255 /* Define this macro if the system uses COFF (Common Object File Format) object
3256 files, so that `collect2' can assume this format and scan object files
3257 directly for dynamic constructor/destructor functions. */
3258 /* #define OBJECT_FORMAT_COFF */
3260 /* Define this macro if the system uses ROSE format object files, so that
3261 `collect2' can assume this format and scan object files directly for dynamic
3262 constructor/destructor functions.
3264 These macros are effective only in a native compiler; `collect2' as
3265 part of a cross compiler always uses `nm' for the target machine. */
3266 /* #define OBJECT_FORMAT_ROSE */
3268 /* Define this macro if the system uses ELF format object files.
3270 Defined in svr4.h. */
3271 /* #define OBJECT_FORMAT_ELF */
3273 /* Define this macro as a C string constant containing the file name to use to
3274 execute `nm'. The default is to search the path normally for `nm'.
3276 If your system supports shared libraries and has a program to list the
3277 dynamic dependencies of a given library or executable, you can define these
3278 macros to enable support for running initialization and termination
3279 functions in shared libraries: */
3280 /* #define REAL_NM_FILE_NAME */
3282 /* Define this macro to a C string constant containing the name of the program
3283 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
3284 /* #define LDD_SUFFIX */
3286 /* Define this macro to be C code that extracts filenames from the output of
3287 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
3288 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
3289 line lists a dynamic dependency, the code must advance PTR to the beginning
3290 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
3291 /* #define PARSE_LDD_OUTPUT (PTR) */
3294 /* Output of Assembler Instructions. */
3296 /* A C initializer containing the assembler's names for the machine registers,
3297 each one as a C string constant. This is what translates register numbers
3298 in the compiler into assembler language. */
3299 #define REGISTER_NAMES \
3301 "r0", "r1", "r2", "r3", \
3302 "r4", "r5", "r6", "r7", \
3303 "r8", "r9", "r10", "r11", \
3304 "r12", "r13", "r14", "r15", \
3305 "r16", "r17", "r18", "r19", \
3306 "r20", "r21", "r22", "r23", \
3307 "r24", "r25", "r26", "r27", \
3308 "r28", "r29", "r30", "r31", \
3309 "r32", "r33", "r34", "r35", \
3310 "r36", "r37", "r38", "r39", \
3311 "r40", "r41", "r42", "r43", \
3312 "r44", "r45", "r46", "r47", \
3313 "r48", "r49", "r50", "r51", \
3314 "r52", "r53", "r54", "r55", \
3315 "r56", "r57", "r58", "r59", \
3316 "r60", "r61", "link", "sp", \
3318 "f0", "f1", "f2", "f3", \
3319 "s", "v", "va", "c", \
3321 "psw", "bpsw", "pc", "bpc", \
3322 "dpsw", "dpc", "rpt_c", "rpt_s", \
3323 "rpt_e", "mod_s", "mod_e", "iba", \
3324 "eit_vb", "int_s", "int_m", \
3327 /* If defined, a C initializer for an array of structures containing a name and
3328 a register number. This macro defines additional names for hard registers,
3329 thus allowing the `asm' option in declarations to refer to registers using
3331 #define ADDITIONAL_REGISTER_NAMES \
3333 {"r62", GPR_LINK}, \
3336 {"f5", FLAG_OVERFLOW}, \
3337 {"f6", FLAG_ACC_OVER}, \
3338 {"f7", FLAG_CARRY}, \
3339 {"carry", FLAG_CARRY}, \
3340 {"borrow", FLAG_BORROW}, \
3341 {"b", FLAG_BORROW}, \
3348 {"cr7", CR_RPT_C}, \
3349 {"cr8", CR_RPT_S}, \
3350 {"cr9", CR_RPT_E}, \
3351 {"cr10", CR_MOD_S}, \
3352 {"cr11", CR_MOD_E}, \
3354 {"cr15", CR_EIT_VB}, \
3355 {"cr16", CR_INT_S}, \
3356 {"cr17", CR_INT_M} \
3359 /* Define this macro if you are using an unusual assembler that requires
3360 different names for the machine instructions.
3362 The definition is a C statement or statements which output an assembler
3363 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
3364 variable of type `char *' which points to the opcode name in its "internal"
3365 form--the form that is written in the machine description. The definition
3366 should output the opcode name to STREAM, performing any translation you
3367 desire, and increment the variable PTR to point at the end of the opcode so
3368 that it will not be output twice.
3370 In fact, your macro definition may process less than the entire opcode name,
3371 or more than the opcode name; but if you want to process text that includes
3372 `%'-sequences to substitute operands, you must take care of the substitution
3373 yourself. Just be sure to increment PTR over whatever text should not be
3376 If you need to look at the operand values, they can be found as the elements
3377 of `recog_data.operand'.
3379 If the macro definition does nothing, the instruction is output in the usual
3381 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
3383 /* If defined, a C statement to be executed just prior to the output of
3384 assembler code for INSN, to modify the extracted operands so they will be
3387 Here the argument OPVEC is the vector containing the operands extracted from
3388 INSN, and NOPERANDS is the number of elements of the vector which contain
3389 meaningful data for this insn. The contents of this vector are what will be
3390 used to convert the insn template into assembler code, so you can change the
3391 assembler output by changing the contents of the vector.
3393 This macro is useful when various assembler syntaxes share a single file of
3394 instruction patterns; by defining this macro differently, you can cause a
3395 large class of instructions to be output differently (such as with
3396 rearranged operands). Naturally, variations in assembler syntax affecting
3397 individual insn patterns ought to be handled by writing conditional output
3398 routines in those patterns.
3400 If this macro is not defined, it is equivalent to a null statement. */
3401 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
3403 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
3404 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
3405 NOPERANDS will be zero. */
3406 /* #define FINAL_PRESCAN_LABEL */
3408 /* A C compound statement to output to stdio stream STREAM the assembler syntax
3409 for an instruction operand X. X is an RTL expression.
3411 CODE is a value that can be used to specify one of several ways of printing
3412 the operand. It is used when identical operands must be printed differently
3413 depending on the context. CODE comes from the `%' specification that was
3414 used to request printing of the operand. If the specification was just
3415 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
3416 the ASCII code for LTR.
3418 If X is a register, this macro should print the register's name. The names
3419 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
3420 is initialized from `REGISTER_NAMES'.
3422 When the machine description has a specification `%PUNCT' (a `%' followed by
3423 a punctuation character), this macro is called with a null pointer for X and
3424 the punctuation character for CODE.
3426 Standard operand flags that are handled elsewhere:
3427 `=' Output a number unique to each instruction in the compilation.
3428 `a' Substitute an operand as if it were a memory reference.
3429 `c' Omit the syntax that indicates an immediate operand.
3430 `l' Substitute a LABEL_REF into a jump instruction.
3431 `n' Like %cDIGIT, except negate the value before printing.
3433 The d30v specific operand flags are:
3435 `f' Print a SF constant as an int.
3436 `s' Subtract 32 and negate.
3437 `A' Print accumulator number without an `a' in front of it.
3438 `B' Print bit offset for BSET, etc. instructions.
3439 `E' Print u if this is zero extend, nothing if this is sign extend.
3440 `F' Emit /{f,t,x}{f,t,x} for executing a false condition.
3441 `L' Print the lower half of a 64 bit item.
3442 `M' Print a memory reference for ld/st instructions.
3443 `R' Return appropriate cmp instruction for relational test.
3445 `T' Emit /{f,t,x}{f,t,x} for executing a true condition.
3446 `U' Print the upper half of a 64 bit item. */
3448 #define PRINT_OPERAND(STREAM, X, CODE) d30v_print_operand (STREAM, X, CODE)
3450 /* A C expression which evaluates to true if CODE is a valid punctuation
3451 character for use in the `PRINT_OPERAND' macro. If
3452 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
3453 characters (except for the standard one, `%') are used in this way. */
3455 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == ':')
3457 /* A C compound statement to output to stdio stream STREAM the assembler syntax
3458 for an instruction operand that is a memory reference whose address is X. X
3459 is an RTL expression. */
3461 #define PRINT_OPERAND_ADDRESS(STREAM, X) d30v_print_operand_address (STREAM, X)
3463 /* A C statement, to be executed after all slot-filler instructions have been
3464 output. If necessary, call `dbr_sequence_length' to determine the number of
3465 slots filled in a sequence (zero if not currently outputting a sequence), to
3466 decide how many no-ops to output, or whatever.
3468 Don't define this macro if it has nothing to do, but it is helpful in
3469 reading assembly output if the extent of the delay sequence is made explicit
3470 (e.g. with white space).
3472 Note that output routines for instructions with delay slots must be prepared
3473 to deal with not being output as part of a sequence (i.e. when the
3474 scheduling pass is not run, or when no slot fillers could be found.) The
3475 variable `final_sequence' is null when not processing a sequence, otherwise
3476 it contains the `sequence' rtx being output. */
3477 /* #define DBR_OUTPUT_SEQEND(FILE) */
3479 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
3480 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
3481 single `md' file must support multiple assembler formats. In that case, the
3482 various `tm.h' files can define these macros differently.
3484 USER_LABEL_PREFIX is defined in svr4.h. */
3486 #define REGISTER_PREFIX "%"
3487 #define LOCAL_LABEL_PREFIX "."
3488 #define USER_LABEL_PREFIX ""
3489 #define IMMEDIATE_PREFIX ""
3491 /* If your target supports multiple dialects of assembler language (such as
3492 different opcodes), define this macro as a C expression that gives the
3493 numeric index of the assembler language dialect to use, with zero as the
3496 If this macro is defined, you may use `{option0|option1|option2...}'
3497 constructs in the output templates of patterns (*note Output Template::.) or
3498 in the first argument of `asm_fprintf'. This construct outputs `option0',
3499 `option1' or `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero,
3500 one or two, etc. Any special characters within these strings retain their
3503 If you do not define this macro, the characters `{', `|' and `}' do not have
3504 any special meaning when used in templates or operands to `asm_fprintf'.
3506 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
3507 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
3508 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
3509 and use the `{option0|option1}' syntax if the syntax variant are larger and
3510 involve such things as different opcodes or operand order. */
3511 /* #define ASSEMBLER_DIALECT */
3513 /* A C expression to output to STREAM some assembler code which will push hard
3514 register number REGNO onto the stack. The code need not be optimal, since
3515 this macro is used only when profiling. */
3516 /* #define ASM_OUTPUT_REG_PUSH (STREAM, REGNO) */
3518 /* A C expression to output to STREAM some assembler code which will pop hard
3519 register number REGNO off of the stack. The code need not be optimal, since
3520 this macro is used only when profiling. */
3521 /* #define ASM_OUTPUT_REG_POP (STREAM, REGNO) */
3524 /* Output of dispatch tables. */
3526 /* This macro should be provided on machines where the addresses in a dispatch
3527 table are relative to the table's own address.
3529 The definition should be a C statement to output to the stdio stream STREAM
3530 an assembler pseudo-instruction to generate a difference between two labels.
3531 VALUE and REL are the numbers of two internal labels. The definitions of
3532 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
3533 printed in the same way here. For example,
3535 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
3537 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
3538 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
3540 /* This macro should be provided on machines where the addresses in a dispatch
3543 The definition should be a C statement to output to the stdio stream STREAM
3544 an assembler pseudo-instruction to generate a reference to a label. VALUE
3545 is the number of an internal label whose definition is output using
3546 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
3548 fprintf (STREAM, "\t.word L%d\n", VALUE) */
3550 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
3551 fprintf (STREAM, "\t.word .L%d\n", VALUE)
3553 /* Define this if the label before a jump-table needs to be output specially.
3554 The first three arguments are the same as for `ASM_OUTPUT_INTERNAL_LABEL';
3555 the fourth argument is the jump-table which follows (a `jump_insn'
3556 containing an `addr_vec' or `addr_diff_vec').
3558 This feature is used on system V to output a `swbeg' statement for the
3561 If this macro is not defined, these labels are output with
3562 `ASM_OUTPUT_INTERNAL_LABEL'.
3564 Defined in svr4.h. */
3565 /* #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) */
3567 /* Define this if something special must be output at the end of a jump-table.
3568 The definition should be a C statement to be executed after the assembler
3569 code for the table is written. It should write the appropriate code to
3570 stdio stream STREAM. The argument TABLE is the jump-table insn, and NUM is
3571 the label-number of the preceding label.
3573 If this macro is not defined, nothing special is output at the end of the
3575 /* #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) */
3578 /* Assembler Commands for Exception Regions. */
3580 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
3581 does not contain any extraneous set bits in it. */
3582 /* #define MASK_RETURN_ADDR */
3584 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
3585 information, but it does not yet work with exception handling. Otherwise,
3586 if your target supports this information (if it defines
3587 `INCOMING_RETURN_ADDR_RTX'), GCC will provide a default definition of 1.
3589 If this macro is defined to 1, the DWARF 2 unwinder will be the default
3590 exception handling mechanism; otherwise, setjmp/longjmp will be used by
3593 If this macro is defined to anything, the DWARF 2 unwinder will be used
3594 instead of inline unwinders and __unwind_function in the non-setjmp case. */
3595 /* #define DWARF2_UNWIND_INFO */
3598 /* Assembler Commands for Alignment. */
3600 /* The alignment (log base 2) to put in front of LABEL, which follows
3603 This macro need not be defined if you don't want any special alignment to be
3604 done at such a time. Most machine descriptions do not currently define the
3606 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
3608 /* The desired alignment for the location counter at the beginning
3611 This macro need not be defined if you don't want any special alignment to be
3612 done at such a time. Most machine descriptions do not currently define the
3614 /* #define LOOP_ALIGN(LABEL) */
3616 /* A C statement to output to the stdio stream STREAM an assembler instruction
3617 to advance the location counter by NBYTES bytes. Those bytes should be zero
3618 when loaded. NBYTES will be a C expression of type `int'.
3620 Defined in svr4.h. */
3621 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
3622 fprintf (STREAM, "\t.zero\t%u\n", (NBYTES)) */
3624 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
3625 section because it fails put zeros in the bytes that are skipped. This is
3626 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
3627 instructions rather than zeros when used in the text section. */
3628 /* #define ASM_NO_SKIP_IN_TEXT */
3630 /* A C statement to output to the stdio stream STREAM an assembler command to
3631 advance the location counter to a multiple of 2 to the POWER bytes. POWER
3632 will be a C expression of type `int'. */
3633 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
3634 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
3637 /* Macros Affecting all Debug Formats. */
3639 /* A C expression that returns the DBX register number for the compiler
3640 register number REGNO. In simple cases, the value of this expression may be
3641 REGNO itself. But sometimes there are some registers that the compiler
3642 knows about and DBX does not, or vice versa. In such cases, some register
3643 may need to have one number in the compiler and another for DBX.
3645 If two registers have consecutive numbers inside GNU CC, and they can be
3646 used as a pair to hold a multiword value, then they *must* have consecutive
3647 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
3648 will be unable to access such a pair, because they expect register pairs to
3649 be consecutive in their own numbering scheme.
3651 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
3652 preserve register pairs, then what you must do instead is redefine the
3653 actual register numbering scheme. */
3654 #define DBX_REGISTER_NUMBER(REGNO) \
3655 (GPR_P (REGNO) ? ((REGNO) - GPR_FIRST) \
3656 : ACCUM_P (REGNO) ? ((REGNO) - ACCUM_FIRST + 84) \
3657 : FLAG_P (REGNO) ? 66 /* return psw for all flags */ \
3658 : (REGNO) == ARG_POINTER_REGNUM ? (GPR_SP - GPR_FIRST) \
3659 : (REGNO) == CR_PSW ? (66 + 0) \
3660 : (REGNO) == CR_BPSW ? (66 + 1) \
3661 : (REGNO) == CR_PC ? (66 + 2) \
3662 : (REGNO) == CR_BPC ? (66 + 3) \
3663 : (REGNO) == CR_DPSW ? (66 + 4) \
3664 : (REGNO) == CR_DPC ? (66 + 5) \
3665 : (REGNO) == CR_RPT_C ? (66 + 7) \
3666 : (REGNO) == CR_RPT_S ? (66 + 8) \
3667 : (REGNO) == CR_RPT_E ? (66 + 9) \
3668 : (REGNO) == CR_MOD_S ? (66 + 10) \
3669 : (REGNO) == CR_MOD_E ? (66 + 11) \
3670 : (REGNO) == CR_IBA ? (66 + 14) \
3671 : (REGNO) == CR_EIT_VB ? (66 + 15) \
3672 : (REGNO) == CR_INT_S ? (66 + 16) \
3673 : (REGNO) == CR_INT_M ? (66 + 17) \
3676 /* A C expression that returns the integer offset value for an automatic
3677 variable having address X (an RTL expression). The default computation
3678 assumes that X is based on the frame-pointer and gives the offset from the
3679 frame-pointer. This is required for targets that produce debugging output
3680 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
3681 to be eliminated when the `-g' options is used. */
3682 /* #define DEBUGGER_AUTO_OFFSET(X) */
3684 /* A C expression that returns the integer offset value for an argument having
3685 address X (an RTL expression). The nominal offset is OFFSET. */
3686 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
3688 /* A C expression that returns the type of debugging output GNU CC produces
3689 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
3690 for GNU CC to support more than one format of debugging output. Currently,
3691 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
3692 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
3694 The value of this macro only affects the default debugging output; the user
3695 can always get a specific type of output by using `-gstabs', `-gcoff',
3696 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
3698 Defined in svr4.h. */
3700 #undef PREFERRED_DEBUGGING_TYPE
3701 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
3704 /* Specific Options for DBX Output. */
3706 /* Define this macro if GNU CC should produce debugging output for DBX in
3707 response to the `-g' option.
3709 Defined in svr4.h. */
3710 /* #define DBX_DEBUGGING_INFO */
3712 /* Define this macro if GNU CC should produce XCOFF format debugging output in
3713 response to the `-g' option. This is a variant of DBX format. */
3714 /* #define XCOFF_DEBUGGING_INFO */
3716 /* Define this macro to control whether GNU CC should by default generate GDB's
3717 extended version of DBX debugging information (assuming DBX-format debugging
3718 information is enabled at all). If you don't define the macro, the default
3719 is 1: always generate the extended information if there is any occasion to. */
3720 /* #define DEFAULT_GDB_EXTENSIONS */
3722 /* Define this macro if all `.stabs' commands should be output while in the
3724 /* #define DEBUG_SYMS_TEXT */
3726 /* A C string constant naming the assembler pseudo op to use instead of
3727 `.stabs' to define an ordinary debugging symbol. If you don't define this
3728 macro, `.stabs' is used. This macro applies only to DBX debugging
3729 information format. */
3730 /* #define ASM_STABS_OP */
3732 /* A C string constant naming the assembler pseudo op to use instead of
3733 `.stabd' to define a debugging symbol whose value is the current location.
3734 If you don't define this macro, `.stabd' is used. This macro applies only
3735 to DBX debugging information format. */
3736 /* #define ASM_STABD_OP */
3738 /* A C string constant naming the assembler pseudo op to use instead of
3739 `.stabn' to define a debugging symbol with no name. If you don't define
3740 this macro, `.stabn' is used. This macro applies only to DBX debugging
3741 information format. */
3742 /* #define ASM_STABN_OP */
3744 /* Define this macro if DBX on your system does not support the construct
3745 `xsTAGNAME'. On some systems, this construct is used to describe a forward
3746 reference to a structure named TAGNAME. On other systems, this construct is
3747 not supported at all. */
3748 /* #define DBX_NO_XREFS */
3750 /* A symbol name in DBX-format debugging information is normally continued
3751 (split into two separate `.stabs' directives) when it exceeds a certain
3752 length (by default, 80 characters). On some operating systems, DBX requires
3753 this splitting; on others, splitting must not be done. You can inhibit
3754 splitting by defining this macro with the value zero. You can override the
3755 default splitting-length by defining this macro as an expression for the
3756 length you desire. */
3757 /* #define DBX_CONTIN_LENGTH */
3759 /* Normally continuation is indicated by adding a `\' character to the end of a
3760 `.stabs' string when a continuation follows. To use a different character
3761 instead, define this macro as a character constant for the character you
3762 want to use. Do not define this macro if backslash is correct for your
3764 /* #define DBX_CONTIN_CHAR */
3766 /* Define this macro if it is necessary to go to the data section before
3767 outputting the `.stabs' pseudo-op for a non-global static variable. */
3768 /* #define DBX_STATIC_STAB_DATA_SECTION */
3770 /* The value to use in the "code" field of the `.stabs' directive for a
3771 typedef. The default is `N_LSYM'. */
3772 /* #define DBX_TYPE_DECL_STABS_CODE */
3774 /* The value to use in the "code" field of the `.stabs' directive for a static
3775 variable located in the text section. DBX format does not provide any
3776 "right" way to do this. The default is `N_FUN'. */
3777 /* #define DBX_STATIC_CONST_VAR_CODE */
3779 /* The value to use in the "code" field of the `.stabs' directive for a
3780 parameter passed in registers. DBX format does not provide any "right" way
3781 to do this. The default is `N_RSYM'. */
3782 /* #define DBX_REGPARM_STABS_CODE */
3784 /* The letter to use in DBX symbol data to identify a symbol as a parameter
3785 passed in registers. DBX format does not customarily provide any way to do
3786 this. The default is `'P''. */
3787 /* #define DBX_REGPARM_STABS_LETTER */
3789 /* The letter to use in DBX symbol data to identify a symbol as a stack
3790 parameter. The default is `'p''. */
3791 /* #define DBX_MEMPARM_STABS_LETTER */
3793 /* Define this macro if the DBX information for a function and its arguments
3794 should precede the assembler code for the function. Normally, in DBX
3795 format, the debugging information entirely follows the assembler code.
3797 Defined in svr4.h. */
3798 /* #define DBX_FUNCTION_FIRST */
3800 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
3801 debugging information for variables and functions defined in that block.
3802 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
3803 /* #define DBX_LBRAC_FIRST */
3805 /* Define this macro if the value of a symbol describing the scope of a block
3806 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
3807 function. Normally, GNU C uses an absolute address.
3809 Defined in svr4.h. */
3810 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
3812 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
3813 stabs for included header files, as on Sun systems. This macro
3814 also directs GNU C to output a type number as a pair of a file
3815 number and a type number within the file. Normally, GNU C does not
3816 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
3817 number for a type number. */
3818 /* #define DBX_USE_BINCL */
3821 /* Open ended Hooks for DBX Output. */
3823 /* Define this macro to say how to output to STREAM the debugging information
3824 for the start of a scope level for variable names. The argument NAME is the
3825 name of an assembler symbol (for use with `assemble_name') whose value is
3826 the address where the scope begins. */
3827 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
3829 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
3830 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
3832 /* Define this macro if the target machine requires special handling to output
3833 an enumeration type. The definition should be a C statement (sans
3834 semicolon) to output the appropriate information to STREAM for the type
3836 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
3838 /* Define this macro if the target machine requires special output at the end
3839 of the debugging information for a function. The definition should be a C
3840 statement (sans semicolon) to output the appropriate information to STREAM.
3841 FUNCTION is the `FUNCTION_DECL' node for the function. */
3842 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
3844 /* Define this macro if you need to control the order of output of the standard
3845 data types at the beginning of compilation. The argument SYMS is a `tree'
3846 which is a chain of all the predefined global symbols, including names of
3849 Normally, DBX output starts with definitions of the types for integers and
3850 characters, followed by all the other predefined types of the particular
3851 language in no particular order.
3853 On some machines, it is necessary to output different particular types
3854 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
3855 symbols in the necessary order. Any predefined types that you don't
3856 explicitly output will be output afterward in no particular order.
3858 Be careful not to define this macro so that it works only for C. There are
3859 no global variables to access most of the built-in types, because another
3860 language may have another set of types. The way to output a particular type
3861 is to look through SYMS to see if you can find it. Here is an example:
3865 for (decl = syms; decl; decl = TREE_CHAIN (decl))
3866 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
3868 dbxout_symbol (decl);
3872 This does nothing if the expected type does not exist.
3874 See the function `init_decl_processing' in `c-decl.c' to find the names to
3875 use for all the built-in C types. */
3876 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
3878 /* Some stabs encapsulation formats (in particular ECOFF), cannot
3879 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
3880 extension construct. On those machines, define this macro to turn
3881 this feature off without disturbing the rest of the gdb extensions. */
3882 /* #define NO_DBX_FUNCTION_END */
3885 /* File names in DBX format. */
3887 /* Define this if DBX wants to have the current directory recorded in each
3890 Note that the working directory is always recorded if GDB extensions are
3892 /* #define DBX_WORKING_DIRECTORY */
3894 /* A C statement to output DBX debugging information to the stdio stream STREAM
3895 which indicates that file NAME is the main source file--the file specified
3896 as the input file for compilation. This macro is called only once, at the
3897 beginning of compilation.
3899 This macro need not be defined if the standard form of output for DBX
3900 debugging information is appropriate.
3902 Defined in svr4.h. */
3903 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
3905 /* A C statement to output DBX debugging information to the stdio stream STREAM
3906 which indicates that the current directory during compilation is named NAME.
3908 This macro need not be defined if the standard form of output for DBX
3909 debugging information is appropriate. */
3910 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
3912 /* A C statement to output DBX debugging information at the end of compilation
3913 of the main source file NAME.
3915 If you don't define this macro, nothing special is output at the end of
3916 compilation, which is correct for most machines. */
3917 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
3919 /* A C statement to output DBX debugging information to the stdio stream STREAM
3920 which indicates that file NAME is the current source file. This output is
3921 generated each time input shifts to a different source file as a result of
3922 `#include', the end of an included file, or a `#line' command.
3924 This macro need not be defined if the standard form of output for DBX
3925 debugging information is appropriate. */
3926 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
3929 /* Macros for SDB and Dwarf Output. */
3931 /* Define this macro if GNU CC should produce COFF-style debugging output for
3932 SDB in response to the `-g' option. */
3933 /* #define SDB_DEBUGGING_INFO */
3935 /* Define this macro if GNU CC should produce dwarf format debugging output in
3936 response to the `-g' option.
3938 Defined in svr4.h. */
3939 /* #define DWARF_DEBUGGING_INFO */
3941 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
3942 output in response to the `-g' option.
3944 To support optional call frame debugging information, you must also define
3945 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
3946 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
3947 and `dwarf2out_reg_save' as appropriate from output_function_prologue() if
3950 Defined in svr4.h. */
3951 /* #define DWARF2_DEBUGGING_INFO */
3953 /* Define these macros to override the assembler syntax for the special SDB
3954 assembler directives. See `sdbout.c' for a list of these macros and their
3955 arguments. If the standard syntax is used, you need not define them
3957 /* #define PUT_SDB_... */
3959 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
3960 assembler directives. In that case, define this macro to be the delimiter
3961 to use (usually `\n'). It is not necessary to define a new set of
3962 `PUT_SDB_OP' macros if this is the only change required. */
3963 /* #define SDB_DELIM */
3965 /* Define this macro to override the usual method of constructing a dummy name
3966 for anonymous structure and union types. See `sdbout.c' for more
3968 /* #define SDB_GENERATE_FAKE */
3970 /* Define this macro to allow references to unknown structure, union, or
3971 enumeration tags to be emitted. Standard COFF does not allow handling of
3972 unknown references, MIPS ECOFF has support for it. */
3973 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
3975 /* Define this macro to allow references to structure, union, or enumeration
3976 tags that have not yet been seen to be handled. Some assemblers choke if
3977 forward tags are used, while some require it. */
3978 /* #define SDB_ALLOW_FORWARD_REFERENCES */
3982 /* Miscellaneous Parameters. */
3984 /* Define this if you have defined special-purpose predicates in the file
3985 `MACHINE.c'. This macro is called within an initializer of an array of
3986 structures. The first field in the structure is the name of a predicate and
3987 the second field is an array of rtl codes. For each predicate, list all rtl
3988 codes that can be in expressions matched by the predicate. The list should
3989 have a trailing comma. Here is an example of two entries in the list for a
3990 typical RISC machine:
3992 #define PREDICATE_CODES \
3993 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
3994 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
3996 Defining this macro does not affect the generated code (however, incorrect
3997 definitions that omit an rtl code that may be matched by the predicate can
3998 cause the compiler to malfunction). Instead, it allows the table built by
3999 `genrecog' to be more compact and efficient, thus speeding up the compiler.
4000 The most important predicates to include in the list specified by this macro
4001 are thoses used in the most insn patterns. */
4003 #define PREDICATE_CODES \
4004 { "short_memory_operand", { MEM }}, \
4005 { "long_memory_operand", { MEM }}, \
4006 { "d30v_memory_operand", { MEM }}, \
4007 { "single_reg_memory_operand", { MEM }}, \
4008 { "const_addr_memory_operand", { MEM }}, \
4009 { "call_operand", { MEM }}, \
4010 { "gpr_operand", { REG, SUBREG }}, \
4011 { "accum_operand", { REG, SUBREG }}, \
4012 { "gpr_or_accum_operand", { REG, SUBREG }}, \
4013 { "cr_operand", { REG, SUBREG }}, \
4014 { "repeat_operand", { REG, SUBREG }}, \
4015 { "flag_operand", { REG, SUBREG }}, \
4016 { "br_flag_operand", { REG, SUBREG }}, \
4017 { "br_flag_or_constant_operand", { REG, SUBREG, CONST_INT }}, \
4018 { "gpr_or_br_flag_operand", { REG, SUBREG }}, \
4019 { "f0_operand", { REG, SUBREG }}, \
4020 { "f1_operand", { REG, SUBREG }}, \
4021 { "carry_operand", { REG, SUBREG }}, \
4022 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, \
4024 { "gpr_or_signed6_operand", { REG, SUBREG, CONST_INT }}, \
4025 { "gpr_or_unsigned5_operand", { REG, SUBREG, CONST_INT }}, \
4026 { "gpr_or_unsigned6_operand", { REG, SUBREG, CONST_INT }}, \
4027 { "gpr_or_constant_operand", { REG, SUBREG, CONST_INT, \
4028 CONST, SYMBOL_REF, \
4030 { "gpr_or_dbl_const_operand", { REG, SUBREG, CONST_INT, \
4031 CONST, SYMBOL_REF, \
4032 LABEL_REF, CONST_DOUBLE }}, \
4033 { "gpr_or_memory_operand", { REG, SUBREG, MEM }}, \
4034 { "move_input_operand", { REG, SUBREG, MEM, CONST_INT, \
4035 CONST, SYMBOL_REF, \
4036 LABEL_REF, CONST_DOUBLE }}, \
4037 { "move_output_operand", { REG, SUBREG, MEM }}, \
4038 { "signed6_operand", { CONST_INT }}, \
4039 { "unsigned5_operand", { CONST_INT }}, \
4040 { "unsigned6_operand", { CONST_INT }}, \
4041 { "bitset_operand", { CONST_INT }}, \
4042 { "condexec_test_operator", { EQ, NE }}, \
4043 { "condexec_branch_operator", { EQ, NE }}, \
4044 { "condexec_unary_operator", { ABS, NEG, NOT, ZERO_EXTEND }}, \
4045 { "condexec_addsub_operator", { PLUS, MINUS }}, \
4046 { "condexec_binary_operator", { MULT, AND, IOR, XOR, \
4047 ASHIFT, ASHIFTRT, LSHIFTRT, \
4048 ROTATE, ROTATERT }}, \
4049 { "condexec_shiftl_operator", { ASHIFT, ROTATE }}, \
4050 { "condexec_extend_operator", { SIGN_EXTEND, ZERO_EXTEND }}, \
4051 { "branch_zero_operator", { EQ, NE }}, \
4052 { "cond_move_dest_operand", { REG, SUBREG, MEM }}, \
4053 { "cond_move_operand", { REG, SUBREG, CONST_INT, \
4054 CONST, SYMBOL_REF, \
4055 LABEL_REF, MEM }}, \
4056 { "cond_exec_operand", { REG, SUBREG, CONST_INT, \
4057 CONST, SYMBOL_REF, \
4058 LABEL_REF, MEM }}, \
4059 { "srelational_si_operator", { EQ, NE, LT, LE, GT, GE }}, \
4060 { "urelational_si_operator", { LTU, LEU, GTU, GEU }}, \
4061 { "relational_di_operator", { EQ, NE, LT, LE, GT, GE, \
4062 LTU, LEU, GTU, GEU }},
4064 /* An alias for a machine mode name. This is the machine mode that elements of
4065 a jump-table should have. */
4066 #define CASE_VECTOR_MODE SImode
4068 /* Define as C expression which evaluates to nonzero if the tablejump
4069 instruction expects the table to contain offsets from the address of the
4071 Do not define this if the table should contain absolute addresses. */
4072 /* #define CASE_VECTOR_PC_RELATIVE 1 */
4074 /* Define this if control falls through a `case' insn when the index value is
4075 out of range. This means the specified default-label is actually ignored by
4076 the `case' insn proper. */
4077 /* #define CASE_DROPS_THROUGH */
4079 /* Define this to be the smallest number of different values for which it is
4080 best to use a jump-table instead of a tree of conditional branches. The
4081 default is four for machines with a `casesi' instruction and five otherwise.
4082 This is best for most machines. */
4083 /* #define CASE_VALUES_THRESHOLD */
4085 /* Define this macro if operations between registers with integral mode smaller
4086 than a word are always performed on the entire register. Most RISC machines
4087 have this property and most CISC machines do not. */
4088 #define WORD_REGISTER_OPERATIONS 1
4090 /* Define this macro to be a C expression indicating when insns that read
4091 memory in MODE, an integral mode narrower than a word, set the bits outside
4092 of MODE to be either the sign-extension or the zero-extension of the data
4093 read. Return `SIGN_EXTEND' for values of MODE for which the insn
4094 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
4097 This macro is not called with MODE non-integral or with a width greater than
4098 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
4099 not define this macro if it would always return `NIL'. On machines where
4100 this macro is defined, you will normally define it as the constant
4101 `SIGN_EXTEND' or `ZERO_EXTEND'. */
4103 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
4105 /* Define if loading short immediate values into registers sign extends. */
4106 #define SHORT_IMMEDIATES_SIGN_EXTEND
4108 /* Define this macro if the same instructions that convert a floating point
4109 number to a signed fixed point number also convert validly to an unsigned
4111 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
4113 /* The maximum number of bytes that a single instruction can move quickly from
4114 memory to memory. */
4117 /* The maximum number of bytes that a single instruction can move quickly from
4118 memory to memory. If this is undefined, the default is `MOVE_MAX'.
4119 Otherwise, it is the constant value that is the largest value that
4120 `MOVE_MAX' can have at run-time. */
4121 /* #define MAX_MOVE_MAX */
4123 /* A C expression that is nonzero if on this machine the number of bits
4124 actually used for the count of a shift operation is equal to the number of
4125 bits needed to represent the size of the object being shifted. When this
4126 macro is non-zero, the compiler will assume that it is safe to omit a
4127 sign-extend, zero-extend, and certain bitwise `and' instructions that
4128 truncates the count of a shift operation. On machines that have
4129 instructions that act on bitfields at variable positions, which may include
4130 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
4131 deletion of truncations of the values that serve as arguments to bitfield
4134 If both types of instructions truncate the count (for shifts) and position
4135 (for bitfield operations), or if no variable-position bitfield instructions
4136 exist, you should define this macro.
4138 However, on some machines, such as the 80386 and the 680x0, truncation only
4139 applies to shift operations and not the (real or pretended) bitfield
4140 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
4141 Instead, add patterns to the `md' file that include the implied truncation
4142 of the shift instructions.
4144 You need not define this macro if it would always have the value of zero. */
4145 /* #define SHIFT_COUNT_TRUNCATED */
4147 /* A C expression which is nonzero if on this machine it is safe to "convert"
4148 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
4149 than INPREC) by merely operating on it as if it had only OUTPREC bits.
4151 On many machines, this expression can be 1.
4153 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
4154 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
4155 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
4157 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
4159 /* A C expression describing the value returned by a comparison operator with
4160 an integral mode and stored by a store-flag instruction (`sCOND') when the
4161 condition is true. This description must apply to *all* the `sCOND'
4162 patterns and all the comparison operators whose results have a `MODE_INT'
4165 A value of 1 or -1 means that the instruction implementing the comparison
4166 operator returns exactly 1 or -1 when the comparison is true and 0 when the
4167 comparison is false. Otherwise, the value indicates which bits of the
4168 result are guaranteed to be 1 when the comparison is true. This value is
4169 interpreted in the mode of the comparison operation, which is given by the
4170 mode of the first operand in the `sCOND' pattern. Either the low bit or the
4171 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
4174 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
4175 that depends only on the specified bits. It can also replace comparison
4176 operators with equivalent operations if they cause the required bits to be
4177 set, even if the remaining bits are undefined. For example, on a machine
4178 whose comparison operators return an `SImode' value and where
4179 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
4180 is relevant, the expression
4182 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
4186 (ashift:SI X (const_int N))
4188 where N is the appropriate shift count to move the bit being tested into the
4191 There is no way to describe a machine that always sets the low-order bit for
4192 a true value, but does not guarantee the value of any other bits, but we do
4193 not know of any machine that has such an instruction. If you are trying to
4194 port GNU CC to such a machine, include an instruction to perform a
4195 logical-and of the result with 1 in the pattern for the comparison operators
4196 and let us know (*note How to Report Bugs: Bug Reporting.).
4198 Often, a machine will have multiple instructions that obtain a value from a
4199 comparison (or the condition codes). Here are rules to guide the choice of
4200 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
4202 * Use the shortest sequence that yields a valid definition for
4203 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
4204 "normalize" the value (convert it to, e.g., 1 or 0) than for
4205 the comparison operators to do so because there may be
4206 opportunities to combine the normalization with other
4209 * For equal-length sequences, use a value of 1 or -1, with -1
4210 being slightly preferred on machines with expensive jumps and
4211 1 preferred on other machines.
4213 * As a second choice, choose a value of `0x80000001' if
4214 instructions exist that set both the sign and low-order bits
4215 but do not define the others.
4217 * Otherwise, use a value of `0x80000000'.
4219 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
4220 its negation in the same number of instructions. On those machines, you
4221 should also define a pattern for those cases, e.g., one matching
4223 (set A (neg:M (ne:M B C)))
4225 Some machines can also perform `and' or `plus' operations on condition code
4226 values with less instructions than the corresponding `sCOND' insn followed
4227 by `and' or `plus'. On those machines, define the appropriate patterns.
4228 Use the names `incscc' and `decscc', respectively, for the the patterns
4229 which perform `plus' or `minus' operations on condition code values. See
4230 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
4231 such instruction sequences on other machines.
4233 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
4235 /* #define STORE_FLAG_VALUE */
4237 /* A C expression that gives a non-zero floating point value that is returned
4238 when comparison operators with floating-point results are true. Define this
4239 macro on machine that have comparison operations that return floating-point
4240 values. If there are no such operations, do not define this macro. */
4241 /* #define FLOAT_STORE_FLAG_VALUE */
4243 /* An alias for the machine mode for pointers. On most machines, define this
4244 to be the integer mode corresponding to the width of a hardware pointer;
4245 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
4246 you must define this to be one of the partial integer modes, such as
4249 The width of `Pmode' must be at least as large as the value of
4250 `POINTER_SIZE'. If it is not equal, you must define the macro
4251 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
4252 #define Pmode SImode
4254 /* An alias for the machine mode used for memory references to functions being
4255 called, in `call' RTL expressions. On most machines this should be
4257 #define FUNCTION_MODE QImode
4259 /* A C expression for the maximum number of instructions above which the
4260 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
4262 The default definition of this macro is 64 plus 8 times the number of
4263 arguments that the function accepts. Some people think a larger threshold
4264 should be used on RISC machines. */
4265 /* #define INTEGRATE_THRESHOLD(DECL) */
4267 /* Define this macro if the system header files support C++ as well as C. This
4268 macro inhibits the usual method of using system header files in C++, which
4269 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
4270 /* #define NO_IMPLICIT_EXTERN_C */
4272 /* Define this macro to handle System V style pragmas (particularly #pack).
4274 Defined in svr4.h. */
4275 #define HANDLE_SYSV_PRAGMA
4277 /* Define this macro if you want to handle #pragma weak (HANDLE_SYSV_PRAGMA
4278 must also be defined). */
4279 /* #define HANDLE_WEAK_PRAGMA */
4281 /* Define this macro if the assembler does not accept the character `$' in
4282 label names. By default constructors and destructors in G++ have `$' in the
4283 identifiers. If this macro is defined, `.' is used instead.
4285 Defined in svr4.h. */
4286 /* #define NO_DOLLAR_IN_LABEL */
4288 /* Define this macro if the assembler does not accept the character `.' in
4289 label names. By default constructors and destructors in G++ have names that
4290 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
4291 /* #define NO_DOT_IN_LABEL */
4293 /* Define this macro if the target system expects every program's `main'
4294 function to return a standard "success" value by default (if no other value
4295 is explicitly returned).
4297 The definition should be a C statement (sans semicolon) to generate the
4298 appropriate rtl instructions. It is used only when compiling the end of
4300 /* #define DEFAULT_MAIN_RETURN */
4302 /* Define this if your `exit' function needs to do something besides calling an
4303 external function `_cleanup' before terminating with `_exit'. The
4304 `EXIT_BODY' macro is only needed if `NEED_ATEXIT' is defined and
4305 `ON_EXIT' is not defined. */
4306 /* #define EXIT_BODY */
4308 /* Define this macro as a C expression that is nonzero if it is safe for the
4309 delay slot scheduler to place instructions in the delay slot of INSN, even
4310 if they appear to use a resource set or clobbered in INSN. INSN is always a
4311 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
4312 behavior. On machines where some `insn' or `jump_insn' is really a function
4313 call and hence has this behavior, you should define this macro.
4315 You need not define this macro if it would always return zero. */
4316 /* #define INSN_SETS_ARE_DELAYED(INSN) */
4318 /* Define this macro as a C expression that is nonzero if it is safe for the
4319 delay slot scheduler to place instructions in the delay slot of INSN, even
4320 if they appear to set or clobber a resource referenced in INSN. INSN is
4321 always a `jump_insn' or an `insn'. On machines where some `insn' or
4322 `jump_insn' is really a function call and its operands are registers whose
4323 use is actually in the subroutine it calls, you should define this macro.
4324 Doing so allows the delay slot scheduler to move instructions which copy
4325 arguments into the argument registers into the delay slot of INSN.
4327 You need not define this macro if it would always return zero. */
4328 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
4330 /* In rare cases, correct code generation requires extra machine dependent
4331 processing between the second jump optimization pass and delayed branch
4332 scheduling. On those machines, define this macro as a C statement to act on
4333 the code starting at INSN. */
4334 #define MACHINE_DEPENDENT_REORG(INSN) d30v_machine_dependent_reorg (INSN)
4336 /* Define this macro if in some cases global symbols from one translation unit
4337 may not be bound to undefined symbols in another translation unit without
4338 user intervention. For instance, under Microsoft Windows symbols must be
4339 explicitly imported from shared libraries (DLLs). */
4340 /* #define MULTIPLE_SYMBOL_SPACES */
4342 /* A C expression for the maximum number of instructions to execute via
4343 conditional execution instructions instead of a branch. A value of
4344 BRANCH_COST+1 is the default if the machine does not use cc0, and 1 if it
4346 #define MAX_CONDITIONAL_EXECUTE d30v_cond_exec
4348 #define D30V_DEFAULT_MAX_CONDITIONAL_EXECUTE 4
4350 /* Values of the -mcond-exec=n string. */
4351 extern int d30v_cond_exec;
4352 extern const char *d30v_cond_exec_string;
4354 #endif /* GCC_D30V_H */
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