1 ;; Predicate definitions for DEC Alpha.
2 ;; Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 ;; This file is part of GCC.
6 ;; GCC is free software; you can redistribute it and/or modify
7 ;; it under the terms of the GNU General Public License as published by
8 ;; the Free Software Foundation; either version 2, or (at your option)
11 ;; GCC is distributed in the hope that it will be useful,
12 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ;; GNU General Public License for more details.
16 ;; You should have received a copy of the GNU General Public License
17 ;; along with GCC; see the file COPYING. If not, write to
18 ;; the Free Software Foundation, 51 Franklin Street, Fifth Floor,
19 ;; Boston, MA 02110-1301, USA.
21 ;; Return 1 if OP is the zero constant for MODE.
22 (define_predicate "const0_operand"
23 (and (match_code "const_int,const_double,const_vector")
24 (match_test "op == CONST0_RTX (mode)")))
26 ;; Returns true if OP is either the constant zero or a register.
27 (define_predicate "reg_or_0_operand"
28 (ior (match_operand 0 "register_operand")
29 (match_operand 0 "const0_operand")))
31 ;; Return 1 if OP is a constant in the range of 0-63 (for a shift) or
33 (define_predicate "reg_or_6bit_operand"
34 (if_then_else (match_code "const_int")
35 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 64")
36 (match_operand 0 "register_operand")))
38 ;; Return 1 if OP is an 8-bit constant.
39 (define_predicate "cint8_operand"
40 (and (match_code "const_int")
41 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 256")))
43 ;; Return 1 if OP is an 8-bit constant or any register.
44 (define_predicate "reg_or_8bit_operand"
45 (if_then_else (match_code "const_int")
46 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 256")
47 (match_operand 0 "register_operand")))
49 ;; Return 1 if OP is a constant or any register.
50 (define_predicate "reg_or_cint_operand"
51 (ior (match_operand 0 "register_operand")
52 (match_operand 0 "const_int_operand")))
54 ;; Return 1 if the operand is a valid second operand to an add insn.
55 (define_predicate "add_operand"
56 (if_then_else (match_code "const_int")
57 (match_test "satisfies_constraint_K (op) || satisfies_constraint_L (op)")
58 (match_operand 0 "register_operand")))
60 ;; Return 1 if the operand is a valid second operand to a
61 ;; sign-extending add insn.
62 (define_predicate "sext_add_operand"
63 (if_then_else (match_code "const_int")
64 (match_test "satisfies_constraint_I (op) || satisfies_constraint_O (op)")
65 (match_operand 0 "register_operand")))
67 ;; Return 1 if the operand is a non-symbolic constant operand that
68 ;; does not satisfy add_operand.
69 (define_predicate "non_add_const_operand"
70 (and (match_code "const_int,const_double,const_vector")
71 (not (match_operand 0 "add_operand"))))
73 ;; Return 1 if the operand is a non-symbolic, nonzero constant operand.
74 (define_predicate "non_zero_const_operand"
75 (and (match_code "const_int,const_double,const_vector")
76 (match_test "op != CONST0_RTX (mode)")))
78 ;; Return 1 if OP is the constant 4 or 8.
79 (define_predicate "const48_operand"
80 (and (match_code "const_int")
81 (match_test "INTVAL (op) == 4 || INTVAL (op) == 8")))
83 ;; Return 1 if OP is a valid first operand to an AND insn.
84 (define_predicate "and_operand"
85 (if_then_else (match_code "const_int")
86 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100
87 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100
88 || zap_mask (INTVAL (op))")
89 (if_then_else (match_code "const_double")
90 (match_test "GET_MODE (op) == VOIDmode
91 && zap_mask (CONST_DOUBLE_LOW (op))
92 && zap_mask (CONST_DOUBLE_HIGH (op))")
93 (match_operand 0 "register_operand"))))
95 ;; Return 1 if OP is a valid first operand to an IOR or XOR insn.
96 (define_predicate "or_operand"
97 (if_then_else (match_code "const_int")
98 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100
99 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100")
100 (match_operand 0 "register_operand")))
102 ;; Return 1 if OP is a constant that is the width, in bits, of an integral
103 ;; mode not larger than DImode.
104 (define_predicate "mode_width_operand"
105 (match_code "const_int")
107 HOST_WIDE_INT i = INTVAL (op);
108 return i == 8 || i == 16 || i == 32 || i == 64;
111 ;; Return 1 if OP is a constant that is a mask of ones of width of an
112 ;; integral machine mode not larger than DImode.
113 (define_predicate "mode_mask_operand"
114 (match_code "const_int,const_double")
116 if (GET_CODE (op) == CONST_INT)
118 HOST_WIDE_INT value = INTVAL (op);
124 if (value == 0xffffffff)
129 else if (HOST_BITS_PER_WIDE_INT == 32 && GET_CODE (op) == CONST_DOUBLE)
131 if (CONST_DOUBLE_LOW (op) == 0xffffffff && CONST_DOUBLE_HIGH (op) == 0)
137 ;; Return 1 if OP is a multiple of 8 less than 64.
138 (define_predicate "mul8_operand"
139 (match_code "const_int")
141 unsigned HOST_WIDE_INT i = INTVAL (op);
142 return i < 64 && i % 8 == 0;
145 ;; Return 1 if OP is a hard floating-point register.
146 (define_predicate "hard_fp_register_operand"
147 (match_operand 0 "register_operand")
149 if (GET_CODE (op) == SUBREG)
150 op = SUBREG_REG (op);
151 return REGNO_REG_CLASS (REGNO (op)) == FLOAT_REGS;
154 ;; Return 1 if OP is a hard general register.
155 (define_predicate "hard_int_register_operand"
156 (match_operand 0 "register_operand")
158 if (GET_CODE (op) == SUBREG)
159 op = SUBREG_REG (op);
160 return REGNO_REG_CLASS (REGNO (op)) == GENERAL_REGS;
163 ;; Return 1 if OP is something that can be reloaded into a register;
164 ;; if it is a MEM, it need not be valid.
165 (define_predicate "some_operand"
166 (ior (match_code "reg,mem,const_int,const_double,const_vector,
167 label_ref,symbol_ref,const,high")
168 (and (match_code "subreg")
169 (match_test "some_operand (SUBREG_REG (op), VOIDmode)"))))
171 ;; Likewise, but don't accept constants.
172 (define_predicate "some_ni_operand"
173 (ior (match_code "reg,mem")
174 (and (match_code "subreg")
175 (match_test "some_ni_operand (SUBREG_REG (op), VOIDmode)"))))
177 ;; Return 1 if OP is a valid operand for the source of a move insn.
178 (define_predicate "input_operand"
179 (match_code "label_ref,symbol_ref,const,high,reg,subreg,mem,
180 const_double,const_vector,const_int")
182 switch (GET_CODE (op))
187 if (TARGET_EXPLICIT_RELOCS)
189 /* We don't split symbolic operands into something unintelligable
190 until after reload, but we do not wish non-small, non-global
191 symbolic operands to be reconstructed from their high/lo_sum
193 return (small_symbolic_operand (op, mode)
194 || global_symbolic_operand (op, mode)
195 || gotdtp_symbolic_operand (op, mode)
196 || gottp_symbolic_operand (op, mode));
199 /* This handles both the Windows/NT and OSF cases. */
200 return mode == ptr_mode || mode == DImode;
203 return (TARGET_EXPLICIT_RELOCS
204 && local_symbolic_operand (XEXP (op, 0), mode));
210 if (register_operand (op, mode))
212 /* ... fall through ... */
214 return ((TARGET_BWX || (mode != HImode && mode != QImode))
215 && general_operand (op, mode));
218 return op == CONST0_RTX (mode);
221 if (reload_in_progress || reload_completed)
222 return alpha_legitimate_constant_p (op);
223 return op == CONST0_RTX (mode);
226 if (mode == QImode || mode == HImode)
228 if (reload_in_progress || reload_completed)
229 return alpha_legitimate_constant_p (op);
230 return add_operand (op, mode);
238 ;; Return 1 if OP is a SYMBOL_REF for a function known to be in this
239 ;; file, and in the same section as the current function.
241 (define_predicate "samegp_function_operand"
242 (match_code "symbol_ref")
244 /* Easy test for recursion. */
245 if (op == XEXP (DECL_RTL (current_function_decl), 0))
248 /* Functions that are not local can be overridden, and thus may
249 not share the same gp. */
250 if (! SYMBOL_REF_LOCAL_P (op))
253 /* If -msmall-data is in effect, assume that there is only one GP
254 for the module, and so any local symbol has this property. We
255 need explicit relocations to be able to enforce this for symbols
256 not defined in this unit of translation, however. */
257 if (TARGET_EXPLICIT_RELOCS && TARGET_SMALL_DATA)
260 /* Functions that are not external are defined in this UoT,
261 and thus must share the same gp. */
262 return ! SYMBOL_REF_EXTERNAL_P (op);
265 ;; Return 1 if OP is a SYMBOL_REF for which we can make a call via bsr.
266 (define_predicate "direct_call_operand"
267 (match_operand 0 "samegp_function_operand")
269 tree op_decl, cfun_sec, op_sec;
271 /* If profiling is implemented via linker tricks, we can't jump
272 to the nogp alternate entry point. Note that current_function_profile
273 would not be correct, since that doesn't indicate if the target
274 function uses profiling. */
275 /* ??? TARGET_PROFILING_NEEDS_GP isn't really the right test,
276 but is approximately correct for the OSF ABIs. Don't know
277 what to do for VMS, NT, or UMK. */
278 if (!TARGET_PROFILING_NEEDS_GP && profile_flag)
281 /* Must be a function. In some cases folks create thunks in static
282 data structures and then make calls to them. If we allow the
283 direct call, we'll get an error from the linker about !samegp reloc
284 against a symbol without a .prologue directive. */
285 if (!SYMBOL_REF_FUNCTION_P (op))
288 /* Must be "near" so that the branch is assumed to reach. With
289 -msmall-text, this is assumed true of all local symbols. Since
290 we've already checked samegp, locality is already assured. */
291 if (TARGET_SMALL_TEXT)
294 /* Otherwise, a decl is "near" if it is defined in the same section. */
295 if (flag_function_sections)
298 op_decl = SYMBOL_REF_DECL (op);
299 if (DECL_ONE_ONLY (current_function_decl)
300 || (op_decl && DECL_ONE_ONLY (op_decl)))
303 cfun_sec = DECL_SECTION_NAME (current_function_decl);
304 op_sec = op_decl ? DECL_SECTION_NAME (op_decl) : NULL;
305 return ((!cfun_sec && !op_sec)
306 || (cfun_sec && op_sec
307 && strcmp (TREE_STRING_POINTER (cfun_sec),
308 TREE_STRING_POINTER (op_sec)) == 0));
311 ;; Return 1 if OP is a valid operand for the MEM of a CALL insn.
313 ;; For TARGET_ABI_OSF, we want to restrict to R27 or a pseudo.
314 ;; For TARGET_ABI_UNICOSMK, we want to restrict to registers.
316 (define_predicate "call_operand"
317 (if_then_else (match_code "reg")
318 (match_test "!TARGET_ABI_OSF
319 || REGNO (op) == 27 || REGNO (op) > LAST_VIRTUAL_REGISTER")
320 (and (match_test "!TARGET_ABI_UNICOSMK")
321 (match_code "symbol_ref"))))
323 ;; Return true if OP is a LABEL_REF, or SYMBOL_REF or CONST referencing
324 ;; a (non-tls) variable known to be defined in this file.
325 (define_predicate "local_symbolic_operand"
326 (match_code "label_ref,const,symbol_ref")
328 if (GET_CODE (op) == LABEL_REF)
331 if (GET_CODE (op) == CONST
332 && GET_CODE (XEXP (op, 0)) == PLUS
333 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
334 op = XEXP (XEXP (op, 0), 0);
336 if (GET_CODE (op) != SYMBOL_REF)
339 return (SYMBOL_REF_LOCAL_P (op)
340 && !SYMBOL_REF_WEAK (op)
341 && !SYMBOL_REF_TLS_MODEL (op));
344 ;; Return true if OP is a SYMBOL_REF or CONST referencing a variable
345 ;; known to be defined in this file in the small data area.
346 (define_predicate "small_symbolic_operand"
347 (match_code "const,symbol_ref")
349 if (! TARGET_SMALL_DATA)
352 if (GET_CODE (op) == CONST
353 && GET_CODE (XEXP (op, 0)) == PLUS
354 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
355 op = XEXP (XEXP (op, 0), 0);
357 if (GET_CODE (op) != SYMBOL_REF)
360 /* ??? There's no encode_section_info equivalent for the rtl
361 constant pool, so SYMBOL_FLAG_SMALL never gets set. */
362 if (CONSTANT_POOL_ADDRESS_P (op))
363 return GET_MODE_SIZE (get_pool_mode (op)) <= g_switch_value;
365 return (SYMBOL_REF_LOCAL_P (op)
366 && SYMBOL_REF_SMALL_P (op)
367 && !SYMBOL_REF_WEAK (op)
368 && !SYMBOL_REF_TLS_MODEL (op));
371 ;; Return true if OP is a SYMBOL_REF or CONST referencing a variable
372 ;; not known (or known not) to be defined in this file.
373 (define_predicate "global_symbolic_operand"
374 (match_code "const,symbol_ref")
376 if (GET_CODE (op) == CONST
377 && GET_CODE (XEXP (op, 0)) == PLUS
378 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
379 op = XEXP (XEXP (op, 0), 0);
381 if (GET_CODE (op) != SYMBOL_REF)
384 return ((!SYMBOL_REF_LOCAL_P (op) || SYMBOL_REF_WEAK (op))
385 && !SYMBOL_REF_TLS_MODEL (op));
388 ;; Returns 1 if OP is a symbolic operand, i.e. a symbol_ref or a label_ref,
389 ;; possibly with an offset.
390 (define_predicate "symbolic_operand"
391 (ior (match_code "symbol_ref,label_ref")
392 (and (match_code "const")
393 (match_test "GET_CODE (XEXP (op,0)) == PLUS
394 && GET_CODE (XEXP (XEXP (op,0), 0)) == SYMBOL_REF
395 && GET_CODE (XEXP (XEXP (op,0), 1)) == CONST_INT"))))
397 ;; Return true if OP is valid for 16-bit DTP relative relocations.
398 (define_predicate "dtp16_symbolic_operand"
399 (and (match_code "const")
400 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_DTPREL)")))
402 ;; Return true if OP is valid for 32-bit DTP relative relocations.
403 (define_predicate "dtp32_symbolic_operand"
404 (and (match_code "const")
405 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_DTPREL)")))
407 ;; Return true if OP is valid for 64-bit DTP relative relocations.
408 (define_predicate "gotdtp_symbolic_operand"
409 (and (match_code "const")
410 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_DTPREL)")))
412 ;; Return true if OP is valid for 16-bit TP relative relocations.
413 (define_predicate "tp16_symbolic_operand"
414 (and (match_code "const")
415 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_TPREL)")))
417 ;; Return true if OP is valid for 32-bit TP relative relocations.
418 (define_predicate "tp32_symbolic_operand"
419 (and (match_code "const")
420 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_TPREL)")))
422 ;; Return true if OP is valid for 64-bit TP relative relocations.
423 (define_predicate "gottp_symbolic_operand"
424 (and (match_code "const")
425 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_TPREL)")))
427 ;; Return 1 if this memory address is a known aligned register plus
428 ;; a constant. It must be a valid address. This means that we can do
429 ;; this as an aligned reference plus some offset.
431 ;; Take into account what reload will do. Oh god this is awful.
432 ;; The horrible comma-operator construct below is to prevent genrecog
433 ;; from thinking that this predicate accepts REG and SUBREG. We don't
434 ;; use recog during reload, so pretending these codes are accepted
435 ;; pessimizes things a tad.
437 (define_predicate "aligned_memory_operand"
438 (ior (match_test "op = resolve_reload_operand (op), 0")
443 if (MEM_ALIGN (op) >= 32)
447 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo)
448 sorts of constructs. Dig for the real base register. */
449 if (reload_in_progress
450 && GET_CODE (op) == PLUS
451 && GET_CODE (XEXP (op, 0)) == PLUS)
452 base = XEXP (XEXP (op, 0), 0);
455 if (! memory_address_p (mode, op))
457 base = (GET_CODE (op) == PLUS ? XEXP (op, 0) : op);
460 return (GET_CODE (base) == REG && REGNO_POINTER_ALIGN (REGNO (base)) >= 32);
463 ;; Similar, but return 1 if OP is a MEM which is not alignable.
465 (define_predicate "unaligned_memory_operand"
466 (ior (match_test "op = resolve_reload_operand (op), 0")
471 if (MEM_ALIGN (op) >= 32)
475 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo)
476 sorts of constructs. Dig for the real base register. */
477 if (reload_in_progress
478 && GET_CODE (op) == PLUS
479 && GET_CODE (XEXP (op, 0)) == PLUS)
480 base = XEXP (XEXP (op, 0), 0);
483 if (! memory_address_p (mode, op))
485 base = (GET_CODE (op) == PLUS ? XEXP (op, 0) : op);
488 return (GET_CODE (base) == REG && REGNO_POINTER_ALIGN (REGNO (base)) < 32);
491 ;; Return 1 if OP is any memory location. During reload a pseudo matches.
492 (define_predicate "any_memory_operand"
493 (ior (match_code "mem,reg")
494 (and (match_code "subreg")
495 (match_test "GET_CODE (SUBREG_REG (op)) == REG"))))
497 ;; Return 1 if OP is either a register or an unaligned memory location.
498 (define_predicate "reg_or_unaligned_mem_operand"
499 (ior (match_operand 0 "register_operand")
500 (match_operand 0 "unaligned_memory_operand")))
502 ;; Return 1 is OP is a memory location that is not a reference
503 ;; (using an AND) to an unaligned location. Take into account
504 ;; what reload will do.
505 (define_predicate "normal_memory_operand"
506 (ior (match_test "op = resolve_reload_operand (op), 0")
507 (and (match_code "mem")
508 (match_test "GET_CODE (XEXP (op, 0)) != AND"))))
510 ;; Returns 1 if OP is not an eliminable register.
512 ;; This exists to cure a pathological failure in the s8addq (et al) patterns,
514 ;; long foo () { long t; bar(); return (long) &t * 26107; }
516 ;; which run afoul of a hack in reload to cure a (presumably) similar
517 ;; problem with lea-type instructions on other targets. But there is
518 ;; one of us and many of them, so work around the problem by selectively
519 ;; preventing combine from making the optimization.
521 (define_predicate "reg_not_elim_operand"
522 (match_operand 0 "register_operand")
524 if (GET_CODE (op) == SUBREG)
525 op = SUBREG_REG (op);
526 return op != frame_pointer_rtx && op != arg_pointer_rtx;
529 ;; Accept a register, but not a subreg of any kind. This allows us to
530 ;; avoid pathological cases in reload wrt data movement common in
531 ;; int->fp conversion. */
532 (define_predicate "reg_no_subreg_operand"
533 (and (match_code "reg")
534 (match_operand 0 "register_operand")))
536 ;; Return 1 if OP is a valid Alpha comparison operator for "cmp" style
538 (define_predicate "alpha_comparison_operator"
539 (match_code "eq,le,lt,leu,ltu"))
541 ;; Similarly, but with swapped operands.
542 (define_predicate "alpha_swapped_comparison_operator"
543 (match_code "eq,ge,gt,gtu"))
545 ;; Return 1 if OP is a valid Alpha comparison operator against zero
546 ;; for "bcc" style instructions.
547 (define_predicate "alpha_zero_comparison_operator"
548 (match_code "eq,ne,le,lt,leu,ltu"))
550 ;; Return 1 if OP is a signed comparison operation.
551 (define_predicate "signed_comparison_operator"
552 (match_code "eq,ne,le,lt,ge,gt"))
554 ;; Return 1 if OP is a valid Alpha floating point comparison operator.
555 (define_predicate "alpha_fp_comparison_operator"
556 (match_code "eq,le,lt,unordered"))
558 ;; Return 1 if this is a divide or modulus operator.
559 (define_predicate "divmod_operator"
560 (match_code "div,mod,udiv,umod"))
562 ;; Return 1 if this is a float->int conversion operator.
563 (define_predicate "fix_operator"
564 (match_code "fix,unsigned_fix"))
566 ;; Recognize an addition operation that includes a constant. Used to
567 ;; convince reload to canonize (plus (plus reg c1) c2) during register
570 (define_predicate "addition_operation"
571 (and (match_code "plus")
572 (match_test "register_operand (XEXP (op, 0), mode)
573 && satisfies_constraint_K (XEXP (op, 1))")))
575 ;; For TARGET_EXPLICIT_RELOCS, we don't obfuscate a SYMBOL_REF to a
576 ;; small symbolic operand until after reload. At which point we need
577 ;; to replace (mem (symbol_ref)) with (mem (lo_sum $29 symbol_ref))
578 ;; so that sched2 has the proper dependency information. */
579 (define_predicate "some_small_symbolic_operand"
580 (match_code "set,parallel,prefetch,unspec,unspec_volatile")
582 /* Avoid search unless necessary. */
583 if (!TARGET_EXPLICIT_RELOCS || !reload_completed)
585 return for_each_rtx (&op, some_small_symbolic_operand_int, NULL);