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1 /* Definitions of target machine GNU compiler. IA-64 version.
2 Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by James E. Wilson <wilson@cygnus.com> and
4 David Mosberger <davidm@hpl.hp.com>.
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)
11 any later version.
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. */
23 /* ??? Look at ABI group documents for list of preprocessor macros and
24 other features required for ABI compliance. */
26 /* ??? Functions containing a non-local goto target save many registers. Why?
27 See for instance execute/920428-2.c. */
29 /* ??? Add support for short data/bss sections. */
31 \f
32 /* Run-time target specifications */
34 /* Target CPU builtins. */
35 #define TARGET_CPU_CPP_BUILTINS() \
36 do { \
43 if (!TARGET_ILP32) \
44 { \
47 } \
48 if (TARGET_BIG_ENDIAN) \
50 } while (0)
52 #define EXTRA_SPECS \
60 /* This declaration should be present. */
63 /* This series of macros is to allow compiler command arguments to enable or
64 disable the use of optional features of the target machine. */
100 #define TARGET_BIG_ENDIAN (target_flags & MASK_BIG_ENDIAN)
102 #define TARGET_GNU_AS (target_flags & MASK_GNU_AS)
104 #define TARGET_GNU_LD (target_flags & MASK_GNU_LD)
106 #define TARGET_NO_PIC (target_flags & MASK_NO_PIC)
108 #define TARGET_VOL_ASM_STOP (target_flags & MASK_VOL_ASM_STOP)
110 #define TARGET_ILP32 (target_flags & MASK_ILP32)
112 #define TARGET_B_STEP (target_flags & MASK_B_STEP)
114 #define TARGET_REG_NAMES (target_flags & MASK_REG_NAMES)
116 #define TARGET_NO_SDATA (target_flags & MASK_NO_SDATA)
118 #define TARGET_CONST_GP (target_flags & MASK_CONST_GP)
120 #define TARGET_AUTO_PIC (target_flags & MASK_AUTO_PIC)
122 #define TARGET_INLINE_FLOAT_DIV_LAT (target_flags & MASK_INLINE_FLOAT_DIV_LAT)
124 #define TARGET_INLINE_FLOAT_DIV_THR (target_flags & MASK_INLINE_FLOAT_DIV_THR)
126 #define TARGET_INLINE_INT_DIV_LAT (target_flags & MASK_INLINE_INT_DIV_LAT)
128 #define TARGET_INLINE_INT_DIV_THR (target_flags & MASK_INLINE_INT_DIV_THR)
130 #define TARGET_INLINE_FLOAT_DIV \
131 (target_flags & (MASK_INLINE_FLOAT_DIV_LAT | MASK_INLINE_FLOAT_DIV_THR))
133 #define TARGET_INLINE_INT_DIV \
134 (target_flags & (MASK_INLINE_INT_DIV_LAT | MASK_INLINE_INT_DIV_THR))
136 #define TARGET_DWARF2_ASM (target_flags & MASK_DWARF2_ASM)
139 #define TARGET_TLS14 (ia64_tls_size == 14)
140 #define TARGET_TLS22 (ia64_tls_size == 22)
141 #define TARGET_TLS64 (ia64_tls_size == 64)
142 #define TARGET_EARLY_STOP_BITS (target_flags & MASK_EARLY_STOP_BITS)
144 #define TARGET_HPUX_LD 0
146 /* This macro defines names of command options to set and clear bits in
147 `target_flags'. Its definition is an initializer with a subgrouping for
148 each command option. */
150 #define TARGET_SWITCHES \
151 { \
198 SUBTARGET_SWITCHES \
200 NULL } \
201 }
203 /* Default target_flags if no switches are specified */
205 #ifndef TARGET_DEFAULT
206 #define TARGET_DEFAULT MASK_DWARF2_ASM
207 #endif
209 #ifndef TARGET_CPU_DEFAULT
210 #define TARGET_CPU_DEFAULT 0
211 #endif
213 #ifndef SUBTARGET_SWITCHES
214 #define SUBTARGET_SWITCHES
215 #endif
217 /* This macro is similar to `TARGET_SWITCHES' but defines names of command
218 options that have values. Its definition is an initializer with a
219 subgrouping for each command option. */
224 /* Which processor to schedule for. The cpu attribute defines a list
225 that mirrors this list, so changes to i64.md must be made at the
226 same time. */
228 enum processor_type
229 {
231 PROCESSOR_ITANIUM2,
232 PROCESSOR_max
233 };
239 #define TARGET_OPTIONS \
240 { \
247 }
249 /* Sometimes certain combinations of command options do not make sense on a
250 particular target machine. You can define a macro `OVERRIDE_OPTIONS' to
251 take account of this. This macro, if defined, is executed once just after
252 all the command options have been parsed. */
254 #define OVERRIDE_OPTIONS ia64_override_options ()
256 /* Some machines may desire to change what optimizations are performed for
257 various optimization levels. This macro, if defined, is executed once just
258 after the optimization level is determined and before the remainder of the
259 command options have been parsed. Values set in this macro are used as the
260 default values for the other command line options. */
262 /* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
263 \f
264 /* Driver configuration */
266 /* A C string constant that tells the GNU CC driver program options to pass to
267 `cc1'. It can also specify how to translate options you give to GNU CC into
268 options for GNU CC to pass to the `cc1'. */
270 #undef CC1_SPEC
273 /* A C string constant that tells the GNU CC driver program options to pass to
274 `cc1plus'. It can also specify how to translate options you give to GNU CC
275 into options for GNU CC to pass to the `cc1plus'. */
277 /* #define CC1PLUS_SPEC "" */
278 \f
279 /* Storage Layout */
281 /* Define this macro to have the value 1 if the most significant bit in a byte
282 has the lowest number; otherwise define it to have the value zero. */
284 #define BITS_BIG_ENDIAN 0
286 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
288 /* Define this macro to have the value 1 if, in a multiword object, the most
289 significant word has the lowest number. */
291 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
293 #if defined(__BIG_ENDIAN__)
294 #define LIBGCC2_WORDS_BIG_ENDIAN 1
295 #else
296 #define LIBGCC2_WORDS_BIG_ENDIAN 0
297 #endif
299 #define UNITS_PER_WORD 8
301 #define POINTER_SIZE (TARGET_ILP32 ? 32 : 64)
303 /* A C expression whose value is zero if pointers that need to be extended
304 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and one if
305 they are zero-extended and negative one if there is a ptr_extend operation.
307 You need not define this macro if the `POINTER_SIZE' is equal to the width
308 of `Pmode'. */
309 /* Need this for 32 bit pointers, see hpux.h for setting it. */
310 /* #define POINTERS_EXTEND_UNSIGNED */
312 /* A macro to update MODE and UNSIGNEDP when an object whose type is TYPE and
313 which has the specified mode and signedness is to be stored in a register.
314 This macro is only called when TYPE is a scalar type. */
315 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
316 do \
317 { \
318 if (GET_MODE_CLASS (MODE) == MODE_INT \
319 && GET_MODE_SIZE (MODE) < 4) \
320 (MODE) = SImode; \
321 } \
322 while (0)
324 /* ??? ABI doesn't allow us to define this. */
325 /* #define PROMOTE_FUNCTION_ARGS */
327 /* ??? ABI doesn't allow us to define this. */
328 /* #define PROMOTE_FUNCTION_RETURN */
330 #define PARM_BOUNDARY 64
332 /* Define this macro if you wish to preserve a certain alignment for the stack
333 pointer. The definition is a C expression for the desired alignment
334 (measured in bits). */
336 #define STACK_BOUNDARY 128
338 /* Align frames on double word boundaries */
339 #ifndef IA64_STACK_ALIGN
340 #define IA64_STACK_ALIGN(LOC) (((LOC) + 15) & ~15)
341 #endif
343 #define FUNCTION_BOUNDARY 128
345 /* Optional x86 80-bit float, quad-precision 128-bit float, and quad-word
346 128 bit integers all require 128 bit alignment. */
347 #define BIGGEST_ALIGNMENT 128
349 /* If defined, a C expression to compute the alignment for a static variable.
350 TYPE is the data type, and ALIGN is the alignment that the object
351 would ordinarily have. The value of this macro is used instead of that
352 alignment to align the object. */
354 #define DATA_ALIGNMENT(TYPE, ALIGN) \
355 (TREE_CODE (TYPE) == ARRAY_TYPE \
356 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
357 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
359 /* If defined, a C expression to compute the alignment given to a constant that
360 is being placed in memory. CONSTANT is the constant and ALIGN is the
361 alignment that the object would ordinarily have. The value of this macro is
362 used instead of that alignment to align the object. */
364 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
365 (TREE_CODE (EXP) == STRING_CST \
366 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
368 #define STRICT_ALIGNMENT 1
370 /* Define this if you wish to imitate the way many other C compilers handle
371 alignment of bitfields and the structures that contain them.
372 The behavior is that the type written for a bit-field (`int', `short', or
373 other integer type) imposes an alignment for the entire structure, as if the
374 structure really did contain an ordinary field of that type. In addition,
375 the bit-field is placed within the structure so that it would fit within such
376 a field, not crossing a boundary for it. */
377 #define PCC_BITFIELD_TYPE_MATTERS 1
379 /* An integer expression for the size in bits of the largest integer machine
380 mode that should actually be used. */
382 /* Allow pairs of registers to be used, which is the intent of the default. */
383 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TImode)
385 /* By default, the C++ compiler will use function addresses in the
386 vtable entries. Setting this nonzero tells the compiler to use
387 function descriptors instead. The value of this macro says how
388 many words wide the descriptor is (normally 2). It is assumed
389 that the address of a function descriptor may be treated as a
390 pointer to a function.
392 For reasons known only to HP, the vtable entries (as opposed to
393 normal function descriptors) are 16 bytes wide in 32-bit mode as
394 well, even though the 3rd and 4th words are unused. */
395 #define TARGET_VTABLE_USES_DESCRIPTORS (TARGET_ILP32 ? 4 : 2)
397 /* Due to silliness in the HPUX linker, vtable entries must be
398 8-byte aligned even in 32-bit mode. Rather than create multiple
399 ABIs, force this restriction on everyone else too. */
400 #define TARGET_VTABLE_ENTRY_ALIGN 64
402 /* Due to the above, we need extra padding for the data entries below 0
403 to retain the alignment of the descriptors. */
404 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE (TARGET_ILP32 ? 2 : 1)
405 \f
406 /* Layout of Source Language Data Types */
408 #define INT_TYPE_SIZE 32
410 #define SHORT_TYPE_SIZE 16
412 #define LONG_TYPE_SIZE (TARGET_ILP32 ? 32 : 64)
414 #define MAX_LONG_TYPE_SIZE 64
416 #define LONG_LONG_TYPE_SIZE 64
418 #define FLOAT_TYPE_SIZE 32
420 #define DOUBLE_TYPE_SIZE 64
422 #define LONG_DOUBLE_TYPE_SIZE 128
424 /* By default we use the 80-bit Intel extended float format packaged
425 in a 128-bit entity. */
426 #define INTEL_EXTENDED_IEEE_FORMAT 1
428 #define DEFAULT_SIGNED_CHAR 1
430 /* A C expression for a string describing the name of the data type to use for
431 size values. The typedef name `size_t' is defined using the contents of the
432 string. */
433 /* ??? Needs to be defined for P64 code. */
434 /* #define SIZE_TYPE */
436 /* A C expression for a string describing the name of the data type to use for
437 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
438 defined using the contents of the string. See `SIZE_TYPE' above for more
439 information. */
440 /* ??? Needs to be defined for P64 code. */
441 /* #define PTRDIFF_TYPE */
443 /* A C expression for a string describing the name of the data type to use for
444 wide characters. The typedef name `wchar_t' is defined using the contents
445 of the string. See `SIZE_TYPE' above for more information. */
446 /* #define WCHAR_TYPE */
448 /* A C expression for the size in bits of the data type for wide characters.
449 This is used in `cpp', which cannot make use of `WCHAR_TYPE'. */
450 /* #define WCHAR_TYPE_SIZE */
452 \f
453 /* Register Basics */
455 /* Number of hardware registers known to the compiler.
456 We have 128 general registers, 128 floating point registers,
457 64 predicate registers, 8 branch registers, one frame pointer,
458 and several "application" registers. */
460 #define FIRST_PSEUDO_REGISTER 335
462 /* Ranges for the various kinds of registers. */
463 #define ADDL_REGNO_P(REGNO) ((unsigned HOST_WIDE_INT) (REGNO) <= 3)
464 #define GR_REGNO_P(REGNO) ((unsigned HOST_WIDE_INT) (REGNO) <= 127)
465 #define FR_REGNO_P(REGNO) ((REGNO) >= 128 && (REGNO) <= 255)
466 #define PR_REGNO_P(REGNO) ((REGNO) >= 256 && (REGNO) <= 319)
467 #define BR_REGNO_P(REGNO) ((REGNO) >= 320 && (REGNO) <= 327)
468 #define GENERAL_REGNO_P(REGNO) \
469 (GR_REGNO_P (REGNO) \
470 || (REGNO) == FRAME_POINTER_REGNUM \
471 || (REGNO) == RETURN_ADDRESS_POINTER_REGNUM)
473 #define GR_REG(REGNO) ((REGNO) + 0)
474 #define FR_REG(REGNO) ((REGNO) + 128)
475 #define PR_REG(REGNO) ((REGNO) + 256)
476 #define BR_REG(REGNO) ((REGNO) + 320)
477 #define OUT_REG(REGNO) ((REGNO) + 120)
478 #define IN_REG(REGNO) ((REGNO) + 112)
479 #define LOC_REG(REGNO) ((REGNO) + 32)
481 #define AR_CCV_REGNUM 330
482 #define AR_UNAT_REGNUM 331
483 #define AR_PFS_REGNUM 332
484 #define AR_LC_REGNUM 333
485 #define AR_EC_REGNUM 334
487 #define IN_REGNO_P(REGNO) ((REGNO) >= IN_REG (0) && (REGNO) <= IN_REG (7))
488 #define LOC_REGNO_P(REGNO) ((REGNO) >= LOC_REG (0) && (REGNO) <= LOC_REG (79))
489 #define OUT_REGNO_P(REGNO) ((REGNO) >= OUT_REG (0) && (REGNO) <= OUT_REG (7))
491 #define AR_M_REGNO_P(REGNO) ((REGNO) == AR_CCV_REGNUM \
492 || (REGNO) == AR_UNAT_REGNUM)
493 #define AR_I_REGNO_P(REGNO) ((REGNO) >= AR_PFS_REGNUM \
494 && (REGNO) < FIRST_PSEUDO_REGISTER)
495 #define AR_REGNO_P(REGNO) ((REGNO) >= AR_CCV_REGNUM \
496 && (REGNO) < FIRST_PSEUDO_REGISTER)
499 /* ??? Don't really need two sets of macros. I like this one better because
500 it is less typing. */
501 #define R_GR(REGNO) GR_REG (REGNO)
502 #define R_FR(REGNO) FR_REG (REGNO)
503 #define R_PR(REGNO) PR_REG (REGNO)
504 #define R_BR(REGNO) BR_REG (REGNO)
506 /* An initializer that says which registers are used for fixed purposes all
507 throughout the compiled code and are therefore not available for general
508 allocation.
510 r0: constant 0
511 r1: global pointer (gp)
512 r12: stack pointer (sp)
513 r13: thread pointer (tp)
514 f0: constant 0.0
515 f1: constant 1.0
516 p0: constant true
517 fp: eliminable frame pointer */
519 /* The last 16 stacked regs are reserved for the 8 input and 8 output
520 registers. */
522 #define FIXED_REGISTERS \
524 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, \
525 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
526 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
527 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
528 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
529 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
530 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
531 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
533 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
534 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
535 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
536 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
537 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
538 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
539 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
540 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
542 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
543 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
544 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
545 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
547 0, 0, 0, 0, 0, 0, 0, 0, \
549 1, 1, 1, 1, 1, 0, 1 \
550 }
552 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered
553 (in general) by function calls as well as for fixed registers. This
554 macro therefore identifies the registers that are not available for
555 general allocation of values that must live across function calls. */
557 #define CALL_USED_REGISTERS \
559 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, \
560 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
561 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
562 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
563 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
564 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
565 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
566 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, \
568 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
569 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
570 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
571 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
572 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
573 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
574 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
575 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
577 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
578 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
579 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
580 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
582 1, 0, 0, 0, 0, 0, 1, 1, \
584 1, 1, 1, 1, 1, 0, 1 \
585 }
587 /* Like `CALL_USED_REGISTERS' but used to overcome a historical
588 problem which makes CALL_USED_REGISTERS *always* include
589 all the FIXED_REGISTERS. Until this problem has been
590 resolved this macro can be used to overcome this situation.
591 In particular, block_propagate() requires this list
592 be accurate, or we can remove registers which should be live.
593 This macro is used in regs_invalidated_by_call. */
595 #define CALL_REALLY_USED_REGISTERS \
597 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, \
598 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
599 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
600 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
601 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
602 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
603 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
604 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, \
606 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
607 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
608 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
609 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
610 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
611 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
612 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
613 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
615 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
616 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
617 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
618 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
620 1, 0, 0, 0, 0, 0, 1, 1, \
622 0, 0, 1, 0, 1, 0, 0 \
623 }
626 /* Define this macro if the target machine has register windows. This C
627 expression returns the register number as seen by the called function
628 corresponding to the register number OUT as seen by the calling function.
629 Return OUT if register number OUT is not an outbound register. */
631 #define INCOMING_REGNO(OUT) \
632 ((unsigned) ((OUT) - OUT_REG (0)) < 8 ? IN_REG ((OUT) - OUT_REG (0)) : (OUT))
634 /* Define this macro if the target machine has register windows. This C
635 expression returns the register number as seen by the calling function
636 corresponding to the register number IN as seen by the called function.
637 Return IN if register number IN is not an inbound register. */
639 #define OUTGOING_REGNO(IN) \
640 ((unsigned) ((IN) - IN_REG (0)) < 8 ? OUT_REG ((IN) - IN_REG (0)) : (IN))
642 /* Define this macro if the target machine has register windows. This
643 C expression returns true if the register is call-saved but is in the
644 register window. */
646 #define LOCAL_REGNO(REGNO) \
647 (IN_REGNO_P (REGNO) || LOC_REGNO_P (REGNO))
649 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
650 return the mode to be used for the comparison. Must be defined if
651 EXTRA_CC_MODES is defined. */
653 #define SELECT_CC_MODE(OP,X,Y) CCmode
654 \f
655 /* Order of allocation of registers */
657 /* If defined, an initializer for a vector of integers, containing the numbers
658 of hard registers in the order in which GNU CC should prefer to use them
659 (from most preferred to least).
661 If this macro is not defined, registers are used lowest numbered first (all
662 else being equal).
664 One use of this macro is on machines where the highest numbered registers
665 must always be saved and the save-multiple-registers instruction supports
666 only sequences of consecutive registers. On such machines, define
667 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
668 allocatable register first. */
670 /* ??? Should the GR return value registers come before or after the rest
671 of the caller-save GRs? */
673 #define REG_ALLOC_ORDER \
674 { \
676 R_GR (14), R_GR (15), R_GR (16), R_GR (17), \
677 R_GR (18), R_GR (19), R_GR (20), R_GR (21), R_GR (22), R_GR (23), \
678 R_GR (24), R_GR (25), R_GR (26), R_GR (27), R_GR (28), R_GR (29), \
679 R_GR (30), R_GR (31), \
681 R_GR (120), R_GR (121), R_GR (122), R_GR (123), R_GR (124), R_GR (125), \
682 R_GR (126), R_GR (127), \
684 R_GR (8), R_GR (9), R_GR (10), R_GR (11), \
686 R_GR (2), R_GR (3), \
688 R_FR (6), R_FR (7), \
690 R_FR (8), R_FR (9), R_FR (10), R_FR (11), \
691 R_FR (12), R_FR (13), R_FR (14), R_FR (15), \
693 R_FR (32), R_FR (33), R_FR (34), R_FR (35), \
694 R_FR (36), R_FR (37), R_FR (38), R_FR (39), R_FR (40), R_FR (41), \
695 R_FR (42), R_FR (43), R_FR (44), R_FR (45), R_FR (46), R_FR (47), \
696 R_FR (48), R_FR (49), R_FR (50), R_FR (51), R_FR (52), R_FR (53), \
697 R_FR (54), R_FR (55), R_FR (56), R_FR (57), R_FR (58), R_FR (59), \
698 R_FR (60), R_FR (61), R_FR (62), R_FR (63), R_FR (64), R_FR (65), \
699 R_FR (66), R_FR (67), R_FR (68), R_FR (69), R_FR (70), R_FR (71), \
700 R_FR (72), R_FR (73), R_FR (74), R_FR (75), R_FR (76), R_FR (77), \
701 R_FR (78), R_FR (79), R_FR (80), R_FR (81), R_FR (82), R_FR (83), \
702 R_FR (84), R_FR (85), R_FR (86), R_FR (87), R_FR (88), R_FR (89), \
703 R_FR (90), R_FR (91), R_FR (92), R_FR (93), R_FR (94), R_FR (95), \
704 R_FR (96), R_FR (97), R_FR (98), R_FR (99), R_FR (100), R_FR (101), \
705 R_FR (102), R_FR (103), R_FR (104), R_FR (105), R_FR (106), R_FR (107), \
706 R_FR (108), R_FR (109), R_FR (110), R_FR (111), R_FR (112), R_FR (113), \
707 R_FR (114), R_FR (115), R_FR (116), R_FR (117), R_FR (118), R_FR (119), \
708 R_FR (120), R_FR (121), R_FR (122), R_FR (123), R_FR (124), R_FR (125), \
709 R_FR (126), R_FR (127), \
711 R_PR (6), R_PR (7), R_PR (8), R_PR (9), R_PR (10), R_PR (11), \
712 R_PR (12), R_PR (13), R_PR (14), R_PR (15), \
714 R_PR (16), R_PR (17), \
715 R_PR (18), R_PR (19), R_PR (20), R_PR (21), R_PR (22), R_PR (23), \
716 R_PR (24), R_PR (25), R_PR (26), R_PR (27), R_PR (28), R_PR (29), \
717 R_PR (30), R_PR (31), R_PR (32), R_PR (33), R_PR (34), R_PR (35), \
718 R_PR (36), R_PR (37), R_PR (38), R_PR (39), R_PR (40), R_PR (41), \
719 R_PR (42), R_PR (43), R_PR (44), R_PR (45), R_PR (46), R_PR (47), \
720 R_PR (48), R_PR (49), R_PR (50), R_PR (51), R_PR (52), R_PR (53), \
721 R_PR (54), R_PR (55), R_PR (56), R_PR (57), R_PR (58), R_PR (59), \
722 R_PR (60), R_PR (61), R_PR (62), R_PR (63), \
724 R_BR (6), R_BR (7), \
725 \
727 R_GR (32), R_GR (33), R_GR (34), R_GR (35), \
728 R_GR (36), R_GR (37), R_GR (38), R_GR (39), R_GR (40), R_GR (41), \
729 R_GR (42), R_GR (43), R_GR (44), R_GR (45), R_GR (46), R_GR (47), \
730 R_GR (48), R_GR (49), R_GR (50), R_GR (51), R_GR (52), R_GR (53), \
731 R_GR (54), R_GR (55), R_GR (56), R_GR (57), R_GR (58), R_GR (59), \
732 R_GR (60), R_GR (61), R_GR (62), R_GR (63), R_GR (64), R_GR (65), \
733 R_GR (66), R_GR (67), R_GR (68), R_GR (69), R_GR (70), R_GR (71), \
734 R_GR (72), R_GR (73), R_GR (74), R_GR (75), R_GR (76), R_GR (77), \
735 R_GR (78), R_GR (79), R_GR (80), R_GR (81), R_GR (82), R_GR (83), \
736 R_GR (84), R_GR (85), R_GR (86), R_GR (87), R_GR (88), R_GR (89), \
737 R_GR (90), R_GR (91), R_GR (92), R_GR (93), R_GR (94), R_GR (95), \
738 R_GR (96), R_GR (97), R_GR (98), R_GR (99), R_GR (100), R_GR (101), \
739 R_GR (102), R_GR (103), R_GR (104), R_GR (105), R_GR (106), R_GR (107), \
740 R_GR (108), \
742 R_GR (112), R_GR (113), R_GR (114), R_GR (115), R_GR (116), R_GR (117), \
743 R_GR (118), R_GR (119), \
745 R_GR (4), R_GR (5), R_GR (6), R_GR (7), \
747 R_FR (2), R_FR (3), R_FR (4), R_FR (5), R_FR (16), R_FR (17), \
748 R_FR (18), R_FR (19), R_FR (20), R_FR (21), R_FR (22), R_FR (23), \
749 R_FR (24), R_FR (25), R_FR (26), R_FR (27), R_FR (28), R_FR (29), \
750 R_FR (30), R_FR (31), \
752 R_PR (1), R_PR (2), R_PR (3), R_PR (4), R_PR (5), \
754 R_BR (1), R_BR (2), R_BR (3), R_BR (4), R_BR (5), \
755 \
757 R_GR (109), R_GR (110), R_GR (111), \
758 \
760 R_GR (0), R_GR (1), R_GR (12), R_GR (13), \
762 R_FR (0), R_FR (1), \
764 R_PR (0), \
766 R_BR (0), \
768 FRAME_POINTER_REGNUM, RETURN_ADDRESS_POINTER_REGNUM, \
769 AR_CCV_REGNUM, AR_UNAT_REGNUM, AR_PFS_REGNUM, AR_LC_REGNUM, \
770 AR_EC_REGNUM \
771 }
772 \f
773 /* How Values Fit in Registers */
775 /* A C expression for the number of consecutive hard registers, starting at
776 register number REGNO, required to hold a value of mode MODE. */
778 /* ??? We say that BImode PR values require two registers. This allows us to
779 easily store the normal and inverted values. We use CCImode to indicate
780 a single predicate register. */
782 #define HARD_REGNO_NREGS(REGNO, MODE) \
783 ((REGNO) == PR_REG (0) && (MODE) == DImode ? 64 \
784 : PR_REGNO_P (REGNO) && (MODE) == BImode ? 2 \
785 : PR_REGNO_P (REGNO) && (MODE) == CCImode ? 1 \
786 : FR_REGNO_P (REGNO) && (MODE) == TFmode && INTEL_EXTENDED_IEEE_FORMAT ? 1 \
787 : (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
789 /* A C expression that is nonzero if it is permissible to store a value of mode
790 MODE in hard register number REGNO (or in several registers starting with
791 that one). */
793 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
794 (FR_REGNO_P (REGNO) ? \
795 GET_MODE_CLASS (MODE) != MODE_CC && \
796 (MODE) != TImode && \
797 (MODE) != BImode && \
798 ((MODE) != TFmode || INTEL_EXTENDED_IEEE_FORMAT) \
799 : PR_REGNO_P (REGNO) ? \
800 (MODE) == BImode || GET_MODE_CLASS (MODE) == MODE_CC \
801 : GR_REGNO_P (REGNO) ? (MODE) != CCImode && (MODE) != TFmode \
802 : AR_REGNO_P (REGNO) ? (MODE) == DImode \
803 : BR_REGNO_P (REGNO) ? (MODE) == DImode \
804 : 0)
806 /* A C expression that is nonzero if it is desirable to choose register
807 allocation so as to avoid move instructions between a value of mode MODE1
808 and a value of mode MODE2.
810 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
811 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
812 zero. */
813 /* Don't tie integer and FP modes, as that causes us to get integer registers
814 allocated for FP instructions. TFmode only supported in FP registers so
815 we can't tie it with any other modes. */
816 #define MODES_TIEABLE_P(MODE1, MODE2) \
817 (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2) \
818 && (((MODE1) == TFmode) == ((MODE2) == TFmode)) \
819 && (((MODE1) == BImode) == ((MODE2) == BImode)))
820 \f
821 /* Handling Leaf Functions */
823 /* A C initializer for a vector, indexed by hard register number, which
824 contains 1 for a register that is allowable in a candidate for leaf function
825 treatment. */
826 /* ??? This might be useful. */
827 /* #define LEAF_REGISTERS */
829 /* A C expression whose value is the register number to which REGNO should be
830 renumbered, when a function is treated as a leaf function. */
831 /* ??? This might be useful. */
832 /* #define LEAF_REG_REMAP(REGNO) */
834 \f
835 /* Register Classes */
837 /* An enumeral type that must be defined with all the register class names as
838 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
839 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
840 which is not a register class but rather tells how many classes there
841 are. */
842 /* ??? When compiling without optimization, it is possible for the only use of
843 a pseudo to be a parameter load from the stack with a REG_EQUIV note.
844 Regclass handles this case specially and does not assign any costs to the
845 pseudo. The pseudo then ends up using the last class before ALL_REGS.
846 Thus we must not let either PR_REGS or BR_REGS be the last class. The
847 testcase for this is gcc.c-torture/execute/va-arg-7.c. */
848 enum reg_class
849 {
850 NO_REGS,
851 PR_REGS,
852 BR_REGS,
853 AR_M_REGS,
854 AR_I_REGS,
855 ADDL_REGS,
856 GR_REGS,
857 FR_REGS,
858 GR_AND_BR_REGS,
859 GR_AND_FR_REGS,
860 ALL_REGS,
861 LIM_REG_CLASSES
862 };
864 #define GENERAL_REGS GR_REGS
866 /* The number of distinct register classes. */
867 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
869 /* An initializer containing the names of the register classes as C string
870 constants. These names are used in writing some of the debugging dumps. */
871 #define REG_CLASS_NAMES \
876 /* An initializer containing the contents of the register classes, as integers
877 which are bit masks. The Nth integer specifies the contents of class N.
878 The way the integer MASK is interpreted is that register R is in the class
879 if `MASK & (1 << R)' is 1. */
880 #define REG_CLASS_CONTENTS \
881 { \
883 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
884 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
885 0x00000000, 0x00000000, 0x0000 }, \
887 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
888 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
889 0xFFFFFFFF, 0xFFFFFFFF, 0x0000 }, \
891 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
892 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
893 0x00000000, 0x00000000, 0x00FF }, \
895 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
896 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
897 0x00000000, 0x00000000, 0x0C00 }, \
899 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
900 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
901 0x00000000, 0x00000000, 0x7000 }, \
903 { 0x0000000F, 0x00000000, 0x00000000, 0x00000000, \
904 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
905 0x00000000, 0x00000000, 0x0000 }, \
907 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
908 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
909 0x00000000, 0x00000000, 0x0300 }, \
911 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
912 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
913 0x00000000, 0x00000000, 0x0000 }, \
915 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
916 0x00000000, 0x00000000, 0x00000000, 0x00000000, \
917 0x00000000, 0x00000000, 0x03FF }, \
919 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
920 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
921 0x00000000, 0x00000000, 0x0300 }, \
923 { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
924 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, \
925 0xFFFFFFFF, 0xFFFFFFFF, 0x7FFF }, \
926 }
928 /* A C expression whose value is a register class containing hard register
929 REGNO. In general there is more than one such class; choose a class which
930 is "minimal", meaning that no smaller class also contains the register. */
931 /* The NO_REGS case is primarily for the benefit of rws_access_reg, which
932 may call here with private (invalid) register numbers, such as
933 REG_VOLATILE. */
934 #define REGNO_REG_CLASS(REGNO) \
935 (ADDL_REGNO_P (REGNO) ? ADDL_REGS \
936 : GENERAL_REGNO_P (REGNO) ? GR_REGS \
937 : FR_REGNO_P (REGNO) ? FR_REGS \
938 : PR_REGNO_P (REGNO) ? PR_REGS \
939 : BR_REGNO_P (REGNO) ? BR_REGS \
940 : AR_M_REGNO_P (REGNO) ? AR_M_REGS \
941 : AR_I_REGNO_P (REGNO) ? AR_I_REGS \
942 : NO_REGS)
944 /* A macro whose definition is the name of the class to which a valid base
945 register must belong. A base register is one used in an address which is
946 the register value plus a displacement. */
947 #define BASE_REG_CLASS GENERAL_REGS
949 /* A macro whose definition is the name of the class to which a valid index
950 register must belong. An index register is one used in an address where its
951 value is either multiplied by a scale factor or added to another register
952 (as well as added to a displacement). This is needed for POST_MODIFY. */
953 #define INDEX_REG_CLASS GENERAL_REGS
955 /* A C expression which defines the machine-dependent operand constraint
956 letters for register classes. If CHAR is such a letter, the value should be
957 the register class corresponding to it. Otherwise, the value should be
958 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
959 will not be passed to this macro; you do not need to handle it. */
961 #define REG_CLASS_FROM_LETTER(CHAR) \
968 : NO_REGS)
970 /* A C expression which is nonzero if register number NUM is suitable for use
971 as a base register in operand addresses. It may be either a suitable hard
972 register or a pseudo register that has been allocated such a hard reg. */
973 #define REGNO_OK_FOR_BASE_P(REGNO) \
974 (GENERAL_REGNO_P (REGNO) || GENERAL_REGNO_P (reg_renumber[REGNO]))
976 /* A C expression which is nonzero if register number NUM is suitable for use
977 as an index register in operand addresses. It may be either a suitable hard
978 register or a pseudo register that has been allocated such a hard reg.
979 This is needed for POST_MODIFY. */
980 #define REGNO_OK_FOR_INDEX_P(NUM) REGNO_OK_FOR_BASE_P (NUM)
982 /* A C expression that places additional restrictions on the register class to
983 use when it is necessary to copy value X into a register in class CLASS.
984 The value is a register class; perhaps CLASS, or perhaps another, smaller
985 class. */
987 /* Don't allow volatile mem reloads into floating point registers. This
988 is defined to force reload to choose the r/m case instead of the f/f case
989 when reloading (set (reg fX) (mem/v)).
991 Do not reload expressions into AR regs. */
993 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
994 (CLASS == FR_REGS && GET_CODE (X) == MEM && MEM_VOLATILE_P (X) ? NO_REGS \
995 : CLASS == FR_REGS && GET_CODE (X) == CONST_DOUBLE ? NO_REGS \
997 && (CLASS == AR_M_REGS || CLASS == AR_I_REGS) ? NO_REGS \
998 : CLASS)
1000 /* You should define this macro to indicate to the reload phase that it may
1001 need to allocate at least one register for a reload in addition to the
1002 register to contain the data. Specifically, if copying X to a register
1003 CLASS in MODE requires an intermediate register, you should define this
1004 to return the largest register class all of whose registers can be used
1005 as intermediate registers or scratch registers. */
1007 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
1008 ia64_secondary_reload_class (CLASS, MODE, X)
1010 /* Certain machines have the property that some registers cannot be copied to
1011 some other registers without using memory. Define this macro on those
1012 machines to be a C expression that is nonzero if objects of mode M in
1013 registers of CLASS1 can only be copied to registers of class CLASS2 by
1014 storing a register of CLASS1 into memory and loading that memory location
1015 into a register of CLASS2. */
1017 #if 0
1018 /* ??? May need this, but since we've disallowed TFmode in GR_REGS,
1019 I'm not quite sure how it could be invoked. The normal problems
1020 with unions should be solved with the addressof fiddling done by
1021 movtf and friends. */
1022 #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \
1023 ((MODE) == TFmode && (((CLASS1) == GR_REGS && (CLASS2) == FR_REGS) \
1024 || ((CLASS1) == FR_REGS && (CLASS2) == GR_REGS)))
1025 #endif
1027 /* A C expression for the maximum number of consecutive registers of
1028 class CLASS needed to hold a value of mode MODE.
1029 This is closely related to the macro `HARD_REGNO_NREGS'. */
1031 #define CLASS_MAX_NREGS(CLASS, MODE) \
1032 ((MODE) == BImode && (CLASS) == PR_REGS ? 2 \
1033 : ((CLASS) == FR_REGS && (MODE) == TFmode) ? 1 \
1034 : (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1036 /* In FP regs, we can't change FP values to integer values and vice
1037 versa, but we can change e.g. DImode to SImode. */
1039 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1040 (GET_MODE_CLASS (FROM) != GET_MODE_CLASS (TO) \
1041 ? reg_classes_intersect_p (CLASS, FR_REGS) : 0)
1043 /* A C expression that defines the machine-dependent operand constraint
1044 letters (`I', `J', `K', .. 'P') that specify particular ranges of
1045 integer values. */
1047 /* 14 bit signed immediate for arithmetic instructions. */
1048 #define CONST_OK_FOR_I(VALUE) \
1049 ((unsigned HOST_WIDE_INT)(VALUE) + 0x2000 < 0x4000)
1050 /* 22 bit signed immediate for arith instructions with r0/r1/r2/r3 source. */
1051 #define CONST_OK_FOR_J(VALUE) \
1052 ((unsigned HOST_WIDE_INT)(VALUE) + 0x200000 < 0x400000)
1053 /* 8 bit signed immediate for logical instructions. */
1054 #define CONST_OK_FOR_K(VALUE) ((unsigned HOST_WIDE_INT)(VALUE) + 0x80 < 0x100)
1055 /* 8 bit adjusted signed immediate for compare pseudo-ops. */
1056 #define CONST_OK_FOR_L(VALUE) ((unsigned HOST_WIDE_INT)(VALUE) + 0x7F < 0x100)
1057 /* 6 bit unsigned immediate for shift counts. */
1058 #define CONST_OK_FOR_M(VALUE) ((unsigned HOST_WIDE_INT)(VALUE) < 0x40)
1059 /* 9 bit signed immediate for load/store post-increments. */
1060 #define CONST_OK_FOR_N(VALUE) ((unsigned HOST_WIDE_INT)(VALUE) + 0x100 < 0x200)
1061 /* 0 for r0. Used by Linux kernel, do not change. */
1062 #define CONST_OK_FOR_O(VALUE) ((VALUE) == 0)
1063 /* 0 or -1 for dep instruction. */
1064 #define CONST_OK_FOR_P(VALUE) ((VALUE) == 0 || (VALUE) == -1)
1066 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1075 : 0)
1077 /* A C expression that defines the machine-dependent operand constraint letters
1078 (`G', `H') that specify particular ranges of `const_double' values. */
1080 /* 0.0 and 1.0 for fr0 and fr1. */
1081 #define CONST_DOUBLE_OK_FOR_G(VALUE) \
1082 ((VALUE) == CONST0_RTX (GET_MODE (VALUE)) \
1083 || (VALUE) == CONST1_RTX (GET_MODE (VALUE)))
1085 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
1088 /* A C expression that defines the optional machine-dependent constraint
1089 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1090 types of operands, usually memory references, for the target machine. */
1092 /* Non-volatile memory for FP_REG loads/stores. */
1093 #define CONSTRAINT_OK_FOR_Q(VALUE) \
1094 (memory_operand((VALUE), VOIDmode) && ! MEM_VOLATILE_P (VALUE))
1095 /* 1..4 for shladd arguments. */
1096 #define CONSTRAINT_OK_FOR_R(VALUE) \
1097 (GET_CODE (VALUE) == CONST_INT && INTVAL (VALUE) >= 1 && INTVAL (VALUE) <= 4)
1098 /* Non-post-inc memory for asms and other unsavory creatures. */
1099 #define CONSTRAINT_OK_FOR_S(VALUE) \
1100 (GET_CODE (VALUE) == MEM \
1102 && (reload_in_progress || memory_operand ((VALUE), VOIDmode)))
1104 #define EXTRA_CONSTRAINT(VALUE, C) \
1108 : 0)
1109 \f
1110 /* Basic Stack Layout */
1112 /* Define this macro if pushing a word onto the stack moves the stack pointer
1113 to a smaller address. */
1114 #define STACK_GROWS_DOWNWARD 1
1116 /* Define this macro if the addresses of local variable slots are at negative
1117 offsets from the frame pointer. */
1118 /* #define FRAME_GROWS_DOWNWARD */
1120 /* Offset from the frame pointer to the first local variable slot to
1121 be allocated. */
1122 #define STARTING_FRAME_OFFSET 0
1124 /* Offset from the stack pointer register to the first location at which
1125 outgoing arguments are placed. If not specified, the default value of zero
1126 is used. This is the proper value for most machines. */
1127 /* IA64 has a 16 byte scratch area that is at the bottom of the stack. */
1128 #define STACK_POINTER_OFFSET 16
1130 /* Offset from the argument pointer register to the first argument's address.
1131 On some machines it may depend on the data type of the function. */
1132 #define FIRST_PARM_OFFSET(FUNDECL) 0
1134 /* A C expression whose value is RTL representing the value of the return
1135 address for the frame COUNT steps up from the current frame, after the
1136 prologue. */
1138 /* ??? Frames other than zero would likely require interpreting the frame
1139 unwind info, so we don't try to support them. We would also need to define
1140 DYNAMIC_CHAIN_ADDRESS and SETUP_FRAME_ADDRESS (for the reg stack flush). */
1142 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1143 ((COUNT) == 0 ? return_address_pointer_rtx : const0_rtx)
1145 /* A C expression whose value is RTL representing the location of the incoming
1146 return address at the beginning of any function, before the prologue. This
1147 RTL is either a `REG', indicating that the return value is saved in `REG',
1148 or a `MEM' representing a location in the stack. This enables DWARF2
1149 unwind info for C++ EH. */
1150 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, BR_REG (0))
1152 /* ??? This is not defined because of three problems.
1153 1) dwarf2out.c assumes that DWARF_FRAME_RETURN_COLUMN fits in one byte.
1154 The default value is FIRST_PSEUDO_REGISTER which doesn't. This can be
1155 worked around by setting PC_REGNUM to FR_REG (0) which is an otherwise
1156 unused register number.
1157 2) dwarf2out_frame_debug core dumps while processing prologue insns. We
1158 need to refine which insns have RTX_FRAME_RELATED_P set and which don't.
1159 3) It isn't possible to turn off EH frame info by defining DWARF2_UNIND_INFO
1160 to zero, despite what the documentation implies, because it is tested in
1161 a few places with #ifdef instead of #if. */
1162 #undef INCOMING_RETURN_ADDR_RTX
1164 /* A C expression whose value is an integer giving the offset, in bytes, from
1165 the value of the stack pointer register to the top of the stack frame at the
1166 beginning of any function, before the prologue. The top of the frame is
1167 defined to be the value of the stack pointer in the previous frame, just
1168 before the call instruction. */
1169 #define INCOMING_FRAME_SP_OFFSET 0
1171 \f
1172 /* Register That Address the Stack Frame. */
1174 /* The register number of the stack pointer register, which must also be a
1175 fixed register according to `FIXED_REGISTERS'. On most machines, the
1176 hardware determines which register this is. */
1178 #define STACK_POINTER_REGNUM 12
1180 /* The register number of the frame pointer register, which is used to access
1181 automatic variables in the stack frame. On some machines, the hardware
1182 determines which register this is. On other machines, you can choose any
1183 register you wish for this purpose. */
1185 #define FRAME_POINTER_REGNUM 328
1187 /* Base register for access to local variables of the function. */
1188 #define HARD_FRAME_POINTER_REGNUM LOC_REG (79)
1190 /* The register number of the arg pointer register, which is used to access the
1191 function's argument list. */
1192 /* r0 won't otherwise be used, so put the always eliminated argument pointer
1193 in it. */
1194 #define ARG_POINTER_REGNUM R_GR(0)
1196 /* Due to the way varargs and argument spilling happens, the argument
1197 pointer is not 16-byte aligned like the stack pointer. */
1198 #define INIT_EXPANDERS \
1199 do { \
1200 if (cfun && cfun->emit->regno_pointer_align) \
1201 REGNO_POINTER_ALIGN (ARG_POINTER_REGNUM) = 64; \
1202 } while (0)
1204 /* The register number for the return address register. For IA-64, this
1205 is not actually a pointer as the name suggests, but that's a name that
1206 gen_rtx_REG already takes care to keep unique. We modify
1207 return_address_pointer_rtx in ia64_expand_prologue to reference the
1208 final output regnum. */
1209 #define RETURN_ADDRESS_POINTER_REGNUM 329
1211 /* Register numbers used for passing a function's static chain pointer. */
1212 /* ??? The ABI sez the static chain should be passed as a normal parameter. */
1213 #define STATIC_CHAIN_REGNUM 15
1214 \f
1215 /* Eliminating the Frame Pointer and the Arg Pointer */
1217 /* A C expression which is nonzero if a function must have and use a frame
1218 pointer. This expression is evaluated in the reload pass. If its value is
1219 nonzero the function will have a frame pointer. */
1220 #define FRAME_POINTER_REQUIRED 0
1222 /* Show we can debug even without a frame pointer. */
1223 #define CAN_DEBUG_WITHOUT_FP
1225 /* If defined, this macro specifies a table of register pairs used to eliminate
1226 unneeded registers that point into the stack frame. */
1228 #define ELIMINABLE_REGS \
1229 { \
1230 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1231 {ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1232 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1233 {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1234 {RETURN_ADDRESS_POINTER_REGNUM, BR_REG (0)}, \
1235 }
1237 /* A C expression that returns nonzero if the compiler is allowed to try to
1238 replace register number FROM with register number TO. The frame pointer
1239 is automatically handled. */
1241 #define CAN_ELIMINATE(FROM, TO) \
1242 (TO == BR_REG (0) ? current_function_is_leaf : 1)
1244 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
1245 specifies the initial difference between the specified pair of
1246 registers. This macro must be defined if `ELIMINABLE_REGS' is
1247 defined. */
1248 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1249 ((OFFSET) = ia64_initial_elimination_offset ((FROM), (TO)))
1250 \f
1251 /* Passing Function Arguments on the Stack */
1253 /* Define this macro if an argument declared in a prototype as an integral type
1254 smaller than `int' should actually be passed as an `int'. In addition to
1255 avoiding errors in certain cases of mismatch, it also makes for better code
1256 on certain machines. */
1257 /* ??? Investigate. */
1258 /* #define PROMOTE_PROTOTYPES */
1260 /* If defined, the maximum amount of space required for outgoing arguments will
1261 be computed and placed into the variable
1262 `current_function_outgoing_args_size'. */
1264 #define ACCUMULATE_OUTGOING_ARGS 1
1266 /* A C expression that should indicate the number of bytes of its own arguments
1267 that a function pops on returning, or 0 if the function pops no arguments
1268 and the caller must therefore pop them all after the function returns. */
1270 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
1272 \f
1273 /* Function Arguments in Registers */
1275 #define MAX_ARGUMENT_SLOTS 8
1276 #define MAX_INT_RETURN_SLOTS 4
1277 #define GR_ARG_FIRST IN_REG (0)
1278 #define GR_RET_FIRST GR_REG (8)
1279 #define GR_RET_LAST GR_REG (11)
1280 #define FR_ARG_FIRST FR_REG (8)
1281 #define FR_RET_FIRST FR_REG (8)
1282 #define FR_RET_LAST FR_REG (15)
1283 #define AR_ARG_FIRST OUT_REG (0)
1285 /* A C expression that controls whether a function argument is passed in a
1286 register, and which register. */
1288 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1289 ia64_function_arg (&CUM, MODE, TYPE, NAMED, 0)
1291 /* Define this macro if the target machine has "register windows", so that the
1292 register in which a function sees an arguments is not necessarily the same
1293 as the one in which the caller passed the argument. */
1295 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
1296 ia64_function_arg (&CUM, MODE, TYPE, NAMED, 1)
1298 /* A C expression for the number of words, at the beginning of an argument,
1299 must be put in registers. The value must be zero for arguments that are
1300 passed entirely in registers or that are entirely pushed on the stack. */
1302 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1303 ia64_function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
1305 /* A C expression that indicates when an argument must be passed by reference.
1306 If nonzero for an argument, a copy of that argument is made in memory and a
1307 pointer to the argument is passed instead of the argument itself. The
1308 pointer is passed in whatever way is appropriate for passing a pointer to
1309 that type. */
1311 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
1312 ia64_function_arg_pass_by_reference (&CUM, MODE, TYPE, NAMED)
1314 /* A C type for declaring a variable that is used as the first argument of
1315 `FUNCTION_ARG' and other related values. For some target machines, the type
1316 `int' suffices and can hold the number of bytes of argument so far. */
1319 {
1326 /* A C statement (sans semicolon) for initializing the variable CUM for the
1327 state at the beginning of the argument list. */
1329 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
1330 do { \
1331 (CUM).words = 0; \
1332 (CUM).int_regs = 0; \
1333 (CUM).fp_regs = 0; \
1334 (CUM).prototype = ((FNTYPE) && TYPE_ARG_TYPES (FNTYPE)) || (LIBNAME); \
1335 } while (0)
1337 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
1338 arguments for the function being compiled. If this macro is undefined,
1339 `INIT_CUMULATIVE_ARGS' is used instead. */
1341 /* We set prototype to true so that we never try to return a PARALLEL from
1342 function_arg. */
1343 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
1344 do { \
1345 (CUM).words = 0; \
1346 (CUM).int_regs = 0; \
1347 (CUM).fp_regs = 0; \
1348 (CUM).prototype = 1; \
1349 } while (0)
1351 /* A C statement (sans semicolon) to update the summarizer variable CUM to
1352 advance past an argument in the argument list. The values MODE, TYPE and
1353 NAMED describe that argument. Once this is done, the variable CUM is
1354 suitable for analyzing the *following* argument with `FUNCTION_ARG'. */
1356 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1357 ia64_function_arg_advance (&CUM, MODE, TYPE, NAMED)
1359 /* If defined, a C expression that gives the alignment boundary, in bits, of an
1360 argument with the specified mode and type. */
1362 /* Arguments with alignment larger than 8 bytes start at the next even
1363 boundary. See ia64_function_arg. */
1365 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
1366 (((TYPE) ? (TYPE_ALIGN (TYPE) > 8 * BITS_PER_UNIT) \
1367 : (((((MODE) == BLKmode \
1368 ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \
1369 + UNITS_PER_WORD - 1) / UNITS_PER_WORD) > 1)) \
1370 ? 128 : PARM_BOUNDARY)
1372 /* A C expression that is nonzero if REGNO is the number of a hard register in
1373 which function arguments are sometimes passed. This does *not* include
1374 implicit arguments such as the static chain and the structure-value address.
1375 On many machines, no registers can be used for this purpose since all
1376 function arguments are pushed on the stack. */
1377 #define FUNCTION_ARG_REGNO_P(REGNO) \
1378 (((REGNO) >= GR_ARG_FIRST && (REGNO) < (GR_ARG_FIRST + MAX_ARGUMENT_SLOTS)) \
1379 || ((REGNO) >= FR_ARG_FIRST && (REGNO) < (FR_ARG_FIRST + MAX_ARGUMENT_SLOTS)))
1380 \f
1381 /* Implement `va_arg'. */
1382 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
1383 ia64_va_arg (valist, type)
1384 \f
1385 /* How Scalar Function Values are Returned */
1387 /* A C expression to create an RTX representing the place where a function
1388 returns a value of data type VALTYPE. */
1390 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1391 ia64_function_value (VALTYPE, FUNC)
1393 /* A C expression to create an RTX representing the place where a library
1394 function returns a value of mode MODE. */
1396 #define LIBCALL_VALUE(MODE) \
1397 gen_rtx_REG (MODE, \
1398 (((GET_MODE_CLASS (MODE) == MODE_FLOAT \
1399 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) && \
1400 ((MODE) != TFmode || INTEL_EXTENDED_IEEE_FORMAT)) \
1401 ? FR_RET_FIRST : GR_RET_FIRST))
1403 /* A C expression that is nonzero if REGNO is the number of a hard register in
1404 which the values of called function may come back. */
1406 #define FUNCTION_VALUE_REGNO_P(REGNO) \
1407 (((REGNO) >= GR_RET_FIRST && (REGNO) <= GR_RET_LAST) \
1408 || ((REGNO) >= FR_RET_FIRST && (REGNO) <= FR_RET_LAST))
1410 \f
1411 /* How Large Values are Returned */
1413 /* A nonzero value says to return the function value in memory, just as large
1414 structures are always returned. */
1416 #define RETURN_IN_MEMORY(TYPE) \
1417 ia64_return_in_memory (TYPE)
1419 /* If you define this macro to be 0, then the conventions used for structure
1420 and union return values are decided by the `RETURN_IN_MEMORY' macro. */
1422 #define DEFAULT_PCC_STRUCT_RETURN 0
1424 /* If the structure value address is passed in a register, then
1425 `STRUCT_VALUE_REGNUM' should be the number of that register. */
1427 #define STRUCT_VALUE_REGNUM GR_REG (8)
1429 \f
1430 /* Caller-Saves Register Allocation */
1432 /* A C expression to determine whether it is worthwhile to consider placing a
1433 pseudo-register in a call-clobbered hard register and saving and restoring
1434 it around each function call. The expression should be 1 when this is worth
1435 doing, and 0 otherwise.
1437 If you don't define this macro, a default is used which is good on most
1438 machines: `4 * CALLS < REFS'. */
1439 /* ??? Investigate. */
1440 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
1442 \f
1443 /* Function Entry and Exit */
1445 /* Define this macro as a C expression that is nonzero if the return
1446 instruction or the function epilogue ignores the value of the stack pointer;
1447 in other words, if it is safe to delete an instruction to adjust the stack
1448 pointer before a return from the function. */
1450 #define EXIT_IGNORE_STACK 1
1452 /* Define this macro as a C expression that is nonzero for registers
1453 used by the epilogue or the `return' pattern. */
1455 #define EPILOGUE_USES(REGNO) ia64_epilogue_uses (REGNO)
1457 /* Nonzero for registers used by the exception handling mechanism. */
1459 #define EH_USES(REGNO) ia64_eh_uses (REGNO)
1461 /* Output at beginning of assembler file. */
1463 #define ASM_FILE_START(FILE) \
1464 emit_safe_across_calls (FILE)
1466 /* Output part N of a function descriptor for DECL. For ia64, both
1467 words are emitted with a single relocation, so ignore N > 0. */
1468 #define ASM_OUTPUT_FDESC(FILE, DECL, PART) \
1469 do { \
1470 if ((PART) == 0) \
1471 { \
1472 if (TARGET_ILP32) \
1474 else \
1476 assemble_name (FILE, XSTR (XEXP (DECL_RTL (DECL), 0), 0)); \
1478 if (TARGET_ILP32) \
1480 } \
1481 } while (0)
1482 \f
1483 /* Generating Code for Profiling. */
1485 /* A C statement or compound statement to output to FILE some assembler code to
1486 call the profiling subroutine `mcount'. */
1488 #undef FUNCTION_PROFILER
1489 #define FUNCTION_PROFILER(FILE, LABELNO) \
1490 do { \
1491 char buf[20]; \
1494 if (TARGET_AUTO_PIC) \
1496 else \
1498 assemble_name (FILE, buf); \
1499 if (TARGET_AUTO_PIC) \
1501 else \
1506 } while (0)
1507 \f
1508 /* Implementing the Varargs Macros. */
1510 /* Define this macro to store the anonymous register arguments into the stack
1511 so that all the arguments appear to have been passed consecutively on the
1512 stack. */
1514 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
1515 ia64_setup_incoming_varargs (ARGS_SO_FAR, MODE, TYPE, & PRETEND_ARGS_SIZE, SECOND_TIME)
1517 /* Define this macro if the location where a function argument is passed
1518 depends on whether or not it is a named argument. */
1520 #define STRICT_ARGUMENT_NAMING 1
1522 \f
1523 /* Trampolines for Nested Functions. */
1525 /* We need 32 bytes, so we can save the sp, ar.rnat, ar.bsp, and ar.pfs of
1526 the function containing a non-local goto target. */
1528 #define STACK_SAVEAREA_MODE(LEVEL) \
1529 ((LEVEL) == SAVE_NONLOCAL ? OImode : Pmode)
1531 /* Output assembler code for a block containing the constant parts of
1532 a trampoline, leaving space for the variable parts.
1534 The trampoline should set the static chain pointer to value placed
1535 into the trampoline and should branch to the specified routine.
1536 To make the normal indirect-subroutine calling convention work,
1537 the trampoline must look like a function descriptor; the first
1538 word being the target address and the second being the target's
1539 global pointer.
1541 We abuse the concept of a global pointer by arranging for it
1542 to point to the data we need to load. The complete trampoline
1543 has the following form:
1545 +-------------------+ \
1546 TRAMP: | __ia64_trampoline | |
1547 +-------------------+ > fake function descriptor
1548 | TRAMP+16 | |
1549 +-------------------+ /
1550 | target descriptor |
1551 +-------------------+
1552 | static link |
1553 +-------------------+
1554 */
1556 /* A C expression for the size in bytes of the trampoline, as an integer. */
1558 #define TRAMPOLINE_SIZE 32
1560 /* Alignment required for trampolines, in bits. */
1562 #define TRAMPOLINE_ALIGNMENT 64
1564 /* A C statement to initialize the variable parts of a trampoline. */
1566 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
1567 ia64_initialize_trampoline((ADDR), (FNADDR), (STATIC_CHAIN))
1568 \f
1569 /* Implicit Calls to Library Routines */
1571 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
1572 C) library functions `memcpy' and `memset' rather than the BSD functions
1573 `bcopy' and `bzero'. */
1575 #define TARGET_MEM_FUNCTIONS
1577 \f
1578 /* Addressing Modes */
1580 /* Define this macro if the machine supports post-increment addressing. */
1582 #define HAVE_POST_INCREMENT 1
1583 #define HAVE_POST_DECREMENT 1
1584 #define HAVE_POST_MODIFY_DISP 1
1585 #define HAVE_POST_MODIFY_REG 1
1587 /* A C expression that is 1 if the RTX X is a constant which is a valid
1588 address. */
1590 #define CONSTANT_ADDRESS_P(X) 0
1592 /* The max number of registers that can appear in a valid memory address. */
1594 #define MAX_REGS_PER_ADDRESS 2
1596 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
1597 RTX) is a legitimate memory address on the target machine for a memory
1598 operand of mode MODE. */
1600 #define LEGITIMATE_ADDRESS_REG(X) \
1601 ((GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
1602 || (GET_CODE (X) == SUBREG && GET_CODE (XEXP (X, 0)) == REG \
1603 && REG_OK_FOR_BASE_P (XEXP (X, 0))))
1605 #define LEGITIMATE_ADDRESS_DISP(R, X) \
1606 (GET_CODE (X) == PLUS \
1607 && rtx_equal_p (R, XEXP (X, 0)) \
1608 && (LEGITIMATE_ADDRESS_REG (XEXP (X, 1)) \
1609 || (GET_CODE (XEXP (X, 1)) == CONST_INT \
1610 && INTVAL (XEXP (X, 1)) >= -256 \
1611 && INTVAL (XEXP (X, 1)) < 256)))
1613 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
1614 do { \
1615 if (LEGITIMATE_ADDRESS_REG (X)) \
1616 goto LABEL; \
1617 else if ((GET_CODE (X) == POST_INC || GET_CODE (X) == POST_DEC) \
1618 && LEGITIMATE_ADDRESS_REG (XEXP (X, 0)) \
1619 && XEXP (X, 0) != arg_pointer_rtx) \
1620 goto LABEL; \
1621 else if (GET_CODE (X) == POST_MODIFY \
1622 && LEGITIMATE_ADDRESS_REG (XEXP (X, 0)) \
1623 && XEXP (X, 0) != arg_pointer_rtx \
1624 && LEGITIMATE_ADDRESS_DISP (XEXP (X, 0), XEXP (X, 1))) \
1625 goto LABEL; \
1626 } while (0)
1628 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
1629 use as a base register. */
1631 #ifdef REG_OK_STRICT
1632 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1633 #else
1634 #define REG_OK_FOR_BASE_P(X) \
1635 (GENERAL_REGNO_P (REGNO (X)) || (REGNO (X) >= FIRST_PSEUDO_REGISTER))
1636 #endif
1638 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
1639 use as an index register. This is needed for POST_MODIFY. */
1641 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
1643 /* A C compound statement that attempts to replace X with a valid memory
1644 address for an operand of mode MODE.
1646 This must be present, but there is nothing useful to be done here. */
1648 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
1650 /* A C statement or compound statement with a conditional `goto LABEL;'
1651 executed if memory address X (an RTX) can have different meanings depending
1652 on the machine mode of the memory reference it is used for or if the address
1653 is valid for some modes but not others. */
1655 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
1656 if (GET_CODE (ADDR) == POST_DEC || GET_CODE (ADDR) == POST_INC) \
1657 goto LABEL;
1659 /* A C expression that is nonzero if X is a legitimate constant for an
1660 immediate operand on the target machine. */
1662 #define LEGITIMATE_CONSTANT_P(X) \
1663 (GET_CODE (X) != CONST_DOUBLE || GET_MODE (X) == VOIDmode \
1664 || GET_MODE (X) == DImode || CONST_DOUBLE_OK_FOR_G (X)) \
1666 \f
1667 /* Condition Code Status */
1669 /* One some machines not all possible comparisons are defined, but you can
1670 convert an invalid comparison into a valid one. */
1671 /* ??? Investigate. See the alpha definition. */
1672 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
1674 \f
1675 /* Describing Relative Costs of Operations */
1677 /* A C expression for the cost of moving data from a register in class FROM to
1678 one in class TO, using MODE. */
1680 #define REGISTER_MOVE_COST ia64_register_move_cost
1682 /* A C expression for the cost of moving data of mode M between a
1683 register and memory. */
1684 #define MEMORY_MOVE_COST(MODE,CLASS,IN) \
1685 ((CLASS) == GENERAL_REGS || (CLASS) == FR_REGS \
1686 || (CLASS) == GR_AND_FR_REGS ? 4 : 10)
1688 /* A C expression for the cost of a branch instruction. A value of 1 is the
1689 default; other values are interpreted relative to that. Used by the
1690 if-conversion code as max instruction count. */
1691 /* ??? This requires investigation. The primary effect might be how
1692 many additional insn groups we run into, vs how good the dynamic
1693 branch predictor is. */
1695 #define BRANCH_COST 6
1697 /* Define this macro as a C expression which is nonzero if accessing less than
1698 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
1699 word of memory. */
1701 #define SLOW_BYTE_ACCESS 1
1703 /* Define this macro if it is as good or better to call a constant function
1704 address than to call an address kept in a register.
1706 Indirect function calls are more expensive that direct function calls, so
1707 don't cse function addresses. */
1709 #define NO_FUNCTION_CSE
1711 \f
1712 /* Dividing the output into sections. */
1714 /* A C expression whose value is a string containing the assembler operation
1715 that should precede instructions and read-only data. */
1719 /* A C expression whose value is a string containing the assembler operation to
1720 identify the following data as writable initialized data. */
1724 /* If defined, a C expression whose value is a string containing the assembler
1725 operation to identify the following data as uninitialized global data. */
1731 #define IA64_DEFAULT_GVALUE 8
1732 \f
1733 /* Position Independent Code. */
1735 /* The register number of the register used to address a table of static data
1736 addresses in memory. */
1738 /* ??? Should modify ia64.md to use pic_offset_table_rtx instead of
1739 gen_rtx_REG (DImode, 1). */
1741 /* ??? Should we set flag_pic? Probably need to define
1742 LEGITIMIZE_PIC_OPERAND_P to make that work. */
1744 #define PIC_OFFSET_TABLE_REGNUM GR_REG (1)
1746 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
1747 clobbered by calls. */
1749 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
1751 \f
1752 /* The Overall Framework of an Assembler File. */
1754 /* A C string constant describing how to begin a comment in the target
1755 assembler language. The compiler assumes that the comment will end at the
1756 end of the line. */
1760 /* A C string constant for text to be output before each `asm' statement or
1761 group of consecutive ones. */
1763 /* ??? This won't work with the Intel assembler, because it does not accept
1764 # as a comment start character. However, //APP does not work in gas, so we
1765 can't use that either. Same problem for ASM_APP_OFF below. */
1769 /* A C string constant for text to be output after each `asm' statement or
1770 group of consecutive ones. */
1774 \f
1775 /* Output of Data. */
1777 /* This is how to output an assembler line defining a `char' constant
1778 to an xdata segment. */
1780 #define ASM_OUTPUT_XDATA_CHAR(FILE, SECTION, VALUE) \
1781 do { \
1783 output_addr_const (FILE, (VALUE)); \
1785 } while (0)
1787 /* This is how to output an assembler line defining a `short' constant
1788 to an xdata segment. */
1790 #define ASM_OUTPUT_XDATA_SHORT(FILE, SECTION, VALUE) \
1791 do { \
1793 output_addr_const (FILE, (VALUE)); \
1795 } while (0)
1797 /* This is how to output an assembler line defining an `int' constant
1798 to an xdata segment. We also handle symbol output here. */
1800 /* ??? For ILP32, also need to handle function addresses here. */
1802 #define ASM_OUTPUT_XDATA_INT(FILE, SECTION, VALUE) \
1803 do { \
1805 output_addr_const (FILE, (VALUE)); \
1807 } while (0)
1809 /* This is how to output an assembler line defining a `long' constant
1810 to an xdata segment. We also handle symbol output here. */
1812 #define ASM_OUTPUT_XDATA_DOUBLE_INT(FILE, SECTION, VALUE) \
1813 do { \
1814 int need_closing_paren = 0; \
1816 if (!(TARGET_NO_PIC || TARGET_AUTO_PIC) \
1817 && GET_CODE (VALUE) == SYMBOL_REF) \
1818 { \
1820 need_closing_paren = 1; \
1821 } \
1822 output_addr_const (FILE, VALUE); \
1823 if (need_closing_paren) \
1826 } while (0)
1829 \f
1830 /* Output of Uninitialized Variables. */
1832 /* This is all handled by svr4.h. */
1834 \f
1835 /* Output and Generation of Labels. */
1837 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
1838 assembler definition of a label named NAME. */
1840 /* See the ASM_OUTPUT_LABELREF definition in sysv4.h for an explanation of
1841 why ia64_asm_output_label exists. */
1844 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
1845 do { \
1846 ia64_asm_output_label = 1; \
1847 assemble_name (STREAM, NAME); \
1849 ia64_asm_output_label = 0; \
1850 } while (0)
1852 /* Globalizing directive for a label. */
1855 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
1856 necessary for declaring the name of an external symbol named NAME which is
1857 referenced in this compilation but not defined. */
1859 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
1860 ia64_asm_output_external (FILE, DECL, NAME)
1862 /* A C statement to store into the string STRING a label whose name is made
1863 from the string PREFIX and the number NUM. */
1865 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
1866 do { \
1868 } while (0)
1870 /* ??? Not sure if using a ? in the name for Intel as is safe. */
1874 /* A C statement to output to the stdio stream STREAM assembler code which
1875 defines (equates) the symbol NAME to have the value VALUE. */
1877 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
1878 do { \
1879 assemble_name (STREAM, NAME); \
1881 assemble_name (STREAM, VALUE); \
1883 } while (0)
1885 \f
1886 /* Macros Controlling Initialization Routines. */
1888 /* This is handled by svr4.h and sysv4.h. */
1890 \f
1891 /* Output of Assembler Instructions. */
1893 /* A C initializer containing the assembler's names for the machine registers,
1894 each one as a C string constant. */
1896 #define REGISTER_NAMES \
1897 { \
1944 }
1946 /* If defined, a C initializer for an array of structures containing a name and
1947 a register number. This macro defines additional names for hard registers,
1948 thus allowing the `asm' option in declarations to refer to registers using
1949 alternate names. */
1951 #define ADDITIONAL_REGISTER_NAMES \
1952 { \
2051 }
2053 /* A C compound statement to output to stdio stream STREAM the assembler syntax
2054 for an instruction operand X. X is an RTL expression. */
2056 #define PRINT_OPERAND(STREAM, X, CODE) \
2057 ia64_print_operand (STREAM, X, CODE)
2059 /* A C expression which evaluates to true if CODE is a valid punctuation
2060 character for use in the `PRINT_OPERAND' macro. */
2062 /* ??? Keep this around for now, as we might need it later. */
2064 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
2067 /* A C compound statement to output to stdio stream STREAM the assembler syntax
2068 for an instruction operand that is a memory reference whose address is X. X
2069 is an RTL expression. */
2071 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
2072 ia64_print_operand_address (STREAM, X)
2074 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
2075 `%I' options of `asm_fprintf' (see `final.c'). */
2082 \f
2083 /* Output of dispatch tables. */
2085 /* This macro should be provided on machines where the addresses in a dispatch
2086 table are relative to the table's own address. */
2088 /* ??? Depends on the pointer size. */
2090 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
2093 /* This is how to output an element of a case-vector that is absolute.
2094 (Ia64 does not use such vectors, but we must define this macro anyway.) */
2096 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) abort ()
2098 /* Jump tables only need 8 byte alignment. */
2100 #define ADDR_VEC_ALIGN(ADDR_VEC) 3
2102 \f
2103 /* Assembler Commands for Exception Regions. */
2105 /* Select a format to encode pointers in exception handling data. CODE
2106 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
2107 true if the symbol may be affected by dynamic relocations. */
2108 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
2109 (((CODE) == 1 ? DW_EH_PE_textrel : DW_EH_PE_datarel) \
2110 | ((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_udata8)
2112 /* Handle special EH pointer encodings. Absolute, pc-relative, and
2113 indirect are handled automatically. */
2114 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
2115 do { \
2116 const char *reltag = NULL; \
2117 if (((ENCODING) & 0xF0) == DW_EH_PE_textrel) \
2119 else if (((ENCODING) & 0xF0) == DW_EH_PE_datarel) \
2121 if (reltag) \
2122 { \
2123 fputs (integer_asm_op (SIZE, FALSE), FILE); \
2124 fputs (reltag, FILE); \
2125 assemble_name (FILE, XSTR (ADDR, 0)); \
2127 goto DONE; \
2128 } \
2129 } while (0)
2131 \f
2132 /* Assembler Commands for Alignment. */
2134 /* ??? Investigate. */
2136 /* The alignment (log base 2) to put in front of LABEL, which follows
2137 a BARRIER. */
2139 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
2141 /* The desired alignment for the location counter at the beginning
2142 of a loop. */
2144 /* #define LOOP_ALIGN(LABEL) */
2146 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
2147 section because it fails put zeros in the bytes that are skipped. */
2149 #define ASM_NO_SKIP_IN_TEXT 1
2151 /* A C statement to output to the stdio stream STREAM an assembler command to
2152 advance the location counter to a multiple of 2 to the POWER bytes. */
2154 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
2157 \f
2158 /* Macros Affecting all Debug Formats. */
2160 /* This is handled in svr4.h and sysv4.h. */
2162 \f
2163 /* Specific Options for DBX Output. */
2165 /* This is handled by dbxelf.h which is included by svr4.h. */
2167 \f
2168 /* Open ended Hooks for DBX Output. */
2170 /* Likewise. */
2172 \f
2173 /* File names in DBX format. */
2175 /* Likewise. */
2177 \f
2178 /* Macros for SDB and Dwarf Output. */
2180 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
2181 output in response to the `-g' option. */
2183 #define DWARF2_DEBUGGING_INFO 1
2185 #define DWARF2_ASM_LINE_DEBUG_INFO (TARGET_DWARF2_ASM)
2187 /* Use tags for debug info labels, so that they don't break instruction
2188 bundles. This also avoids getting spurious DV warnings from the
2189 assembler. This is similar to (*targetm.asm_out.internal_label), except that we
2190 add brackets around the label. */
2192 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
2195 /* Use section-relative relocations for debugging offsets. Unlike other
2196 targets that fake this by putting the section VMA at 0, IA-64 has
2197 proper relocations for them. */
2198 #define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL) \
2199 do { \
2200 fputs (integer_asm_op (SIZE, FALSE), FILE); \
2202 assemble_name (FILE, LABEL); \
2204 } while (0)
2206 /* Emit a PC-relative relocation. */
2207 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL) \
2208 do { \
2209 fputs (integer_asm_op (SIZE, FALSE), FILE); \
2211 assemble_name (FILE, LABEL); \
2213 } while (0)
2214 \f
2215 /* Register Renaming Parameters. */
2217 /* A C expression that is nonzero if hard register number REGNO2 can be
2218 considered for use as a rename register for REGNO1 */
2220 #define HARD_REGNO_RENAME_OK(REGNO1,REGNO2) \
2221 ia64_hard_regno_rename_ok((REGNO1), (REGNO2))
2223 \f
2224 /* Miscellaneous Parameters. */
2226 /* Define this if you have defined special-purpose predicates in the file
2227 `MACHINE.c'. For each predicate, list all rtl codes that can be in
2228 expressions matched by the predicate. */
2230 #define PREDICATE_CODES \
2240 CONSTANT_P_RTX, SYMBOL_REF, CONST, LABEL_REF}}, \
2253 CONSTANT_P_RTX}}, \
2255 CONSTANT_P_RTX}}, \
2260 CONSTANT_P_RTX}}, \
2277 /* An alias for a machine mode name. This is the machine mode that elements of
2278 a jump-table should have. */
2280 #define CASE_VECTOR_MODE Pmode
2282 /* Define as C expression which evaluates to nonzero if the tablejump
2283 instruction expects the table to contain offsets from the address of the
2284 table. */
2286 #define CASE_VECTOR_PC_RELATIVE 1
2288 /* Define this macro if operations between registers with integral mode smaller
2289 than a word are always performed on the entire register. */
2291 #define WORD_REGISTER_OPERATIONS
2293 /* Define this macro to be a C expression indicating when insns that read
2294 memory in MODE, an integral mode narrower than a word, set the bits outside
2295 of MODE to be either the sign-extension or the zero-extension of the data
2296 read. */
2298 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
2300 /* The maximum number of bytes that a single instruction can move quickly from
2301 memory to memory. */
2302 #define MOVE_MAX 8
2304 /* A C expression which is nonzero if on this machine it is safe to "convert"
2305 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
2306 than INPREC) by merely operating on it as if it had only OUTPREC bits. */
2308 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2310 /* A C expression describing the value returned by a comparison operator with
2311 an integral mode and stored by a store-flag instruction (`sCOND') when the
2312 condition is true. */
2314 /* ??? Investigate using -1 instead of 1. */
2316 #define STORE_FLAG_VALUE 1
2318 /* An alias for the machine mode for pointers. */
2320 /* ??? This would change if we had ILP32 support. */
2322 #define Pmode DImode
2324 /* An alias for the machine mode used for memory references to functions being
2325 called, in `call' RTL expressions. */
2327 #define FUNCTION_MODE Pmode
2329 /* Define this macro to handle System V style pragmas: #pragma pack and
2330 #pragma weak. Note, #pragma weak will only be supported if SUPPORT_WEAK is
2331 defined. */
2333 /* If this architecture supports prefetch, define this to be the number of
2334 prefetch commands that can be executed in parallel.
2336 ??? This number is bogus and needs to be replaced before the value is
2337 actually used in optimizations. */
2339 #define SIMULTANEOUS_PREFETCHES 6
2341 /* If this architecture supports prefetch, define this to be the size of
2342 the cache line that is prefetched. */
2344 #define PREFETCH_BLOCK 32
2346 #define HANDLE_SYSV_PRAGMA 1
2348 /* In rare cases, correct code generation requires extra machine dependent
2349 processing between the second jump optimization pass and delayed branch
2350 scheduling. On those machines, define this macro as a C statement to act on
2351 the code starting at INSN. */
2353 #define MACHINE_DEPENDENT_REORG(INSN) ia64_reorg (INSN)
2355 /* A C expression for the maximum number of instructions to execute via
2356 conditional execution instructions instead of a branch. A value of
2357 BRANCH_COST+1 is the default if the machine does not use
2358 cc0, and 1 if it does use cc0. */
2359 /* ??? Investigate. */
2360 #define MAX_CONDITIONAL_EXECUTE 12
2364 #define IA64_UNWIND_INFO 1
2365 #define IA64_UNWIND_EMIT(f,i) process_for_unwind_directive (f,i)
2367 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 15 : INVALID_REGNUM)
2369 /* This function contains machine specific function data. */
2371 {
2372 /* The new stack pointer when unwinding from EH. */
2373 rtx ia64_eh_epilogue_sp;
2375 /* The new bsp value when unwinding from EH. */
2376 rtx ia64_eh_epilogue_bsp;
2378 /* The GP value save register. */
2379 rtx ia64_gp_save;
2381 /* The number of varargs registers to save. */
2383 };
2386 enum ia64_builtins
2387 {
2388 IA64_BUILTIN_SYNCHRONIZE,
2390 IA64_BUILTIN_FETCH_AND_ADD_SI,
2391 IA64_BUILTIN_FETCH_AND_SUB_SI,
2392 IA64_BUILTIN_FETCH_AND_OR_SI,
2393 IA64_BUILTIN_FETCH_AND_AND_SI,
2394 IA64_BUILTIN_FETCH_AND_XOR_SI,
2395 IA64_BUILTIN_FETCH_AND_NAND_SI,
2397 IA64_BUILTIN_ADD_AND_FETCH_SI,
2398 IA64_BUILTIN_SUB_AND_FETCH_SI,
2399 IA64_BUILTIN_OR_AND_FETCH_SI,
2400 IA64_BUILTIN_AND_AND_FETCH_SI,
2401 IA64_BUILTIN_XOR_AND_FETCH_SI,
2402 IA64_BUILTIN_NAND_AND_FETCH_SI,
2404 IA64_BUILTIN_BOOL_COMPARE_AND_SWAP_SI,
2405 IA64_BUILTIN_VAL_COMPARE_AND_SWAP_SI,
2407 IA64_BUILTIN_SYNCHRONIZE_SI,
2409 IA64_BUILTIN_LOCK_TEST_AND_SET_SI,
2411 IA64_BUILTIN_LOCK_RELEASE_SI,
2413 IA64_BUILTIN_FETCH_AND_ADD_DI,
2414 IA64_BUILTIN_FETCH_AND_SUB_DI,
2415 IA64_BUILTIN_FETCH_AND_OR_DI,
2416 IA64_BUILTIN_FETCH_AND_AND_DI,
2417 IA64_BUILTIN_FETCH_AND_XOR_DI,
2418 IA64_BUILTIN_FETCH_AND_NAND_DI,
2420 IA64_BUILTIN_ADD_AND_FETCH_DI,
2421 IA64_BUILTIN_SUB_AND_FETCH_DI,
2422 IA64_BUILTIN_OR_AND_FETCH_DI,
2423 IA64_BUILTIN_AND_AND_FETCH_DI,
2424 IA64_BUILTIN_XOR_AND_FETCH_DI,
2425 IA64_BUILTIN_NAND_AND_FETCH_DI,
2427 IA64_BUILTIN_BOOL_COMPARE_AND_SWAP_DI,
2428 IA64_BUILTIN_VAL_COMPARE_AND_SWAP_DI,
2430 IA64_BUILTIN_SYNCHRONIZE_DI,
2432 IA64_BUILTIN_LOCK_TEST_AND_SET_DI,
2434 IA64_BUILTIN_LOCK_RELEASE_DI,
2436 IA64_BUILTIN_BSP,
2437 IA64_BUILTIN_FLUSHRS
2438 };
2440 /* Codes for expand_compare_and_swap and expand_swap_and_compare. */
2443 };
2445 #define DONT_USE_BUILTIN_SETJMP
2447 /* Output any profiling code before the prologue. */
2449 #undef PROFILE_BEFORE_PROLOGUE
2450 #define PROFILE_BEFORE_PROLOGUE 1
2452 \f
2454 /* Switch on code for querying unit reservations. */
2455 #define CPU_UNITS_QUERY 1
2457 /* End of ia64.h */