1 ;; Predicate definitions for DEC Alpha.
2 ;; Copyright (C) 2004, 2005 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, 59 Temple Place - Suite 330,
19 ;; Boston, MA 02111-1307, 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 "CONST_OK_FOR_LETTER_P (INTVAL (op), 'K')
58 || CONST_OK_FOR_LETTER_P (INTVAL (op), 'L')")
59 (match_operand 0 "register_operand")))
61 ;; Return 1 if the operand is a valid second operand to a
62 ;; sign-extending add insn.
63 (define_predicate "sext_add_operand"
64 (if_then_else (match_code "const_int")
65 (match_test "CONST_OK_FOR_LETTER_P (INTVAL (op), 'I')
66 || CONST_OK_FOR_LETTER_P (INTVAL (op), 'O')")
67 (match_operand 0 "register_operand")))
69 ;; Return 1 if the operand is a non-symbolic constant operand that
70 ;; does not satisfy add_operand.
71 (define_predicate "non_add_const_operand"
72 (and (match_code "const_int,const_double,const_vector")
73 (not (match_operand 0 "add_operand"))))
75 ;; Return 1 if the operand is a non-symbolic, non-zero constant operand.
76 (define_predicate "non_zero_const_operand"
77 (and (match_code "const_int,const_double,const_vector")
78 (match_test "op != CONST0_RTX (mode)")))
80 ;; Return 1 if OP is the constant 4 or 8.
81 (define_predicate "const48_operand"
82 (and (match_code "const_int")
83 (match_test "INTVAL (op) == 4 || INTVAL (op) == 8")))
85 ;; Return 1 if OP is a valid first operand to an AND insn.
86 (define_predicate "and_operand"
87 (if_then_else (match_code "const_int")
88 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100
89 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100
90 || zap_mask (INTVAL (op))")
91 (if_then_else (match_code "const_double")
92 (match_test "zap_mask (CONST_DOUBLE_LOW (op))
93 && zap_mask (CONST_DOUBLE_HIGH (op))")
94 (match_operand 0 "register_operand"))))
96 ;; Return 1 if OP is a valid first operand to an IOR or XOR insn.
97 (define_predicate "or_operand"
98 (if_then_else (match_code "const_int")
99 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100
100 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100")
101 (match_operand 0 "register_operand")))
103 ;; Return 1 if OP is a constant that is the width, in bits, of an integral
104 ;; mode not larger than DImode.
105 (define_predicate "mode_width_operand"
106 (match_code "const_int")
108 HOST_WIDE_INT i = INTVAL (op);
109 return i == 8 || i == 16 || i == 32 || i == 64;
112 ;; Return 1 if OP is a constant that is a mask of ones of width of an
113 ;; integral machine mode not larger than DImode.
114 (define_predicate "mode_mask_operand"
115 (match_code "const_int,const_double")
117 if (GET_CODE (op) == CONST_INT)
119 HOST_WIDE_INT value = INTVAL (op);
125 if (value == 0xffffffff)
130 else if (HOST_BITS_PER_WIDE_INT == 32 && GET_CODE (op) == CONST_DOUBLE)
132 if (CONST_DOUBLE_LOW (op) == 0xffffffff && CONST_DOUBLE_HIGH (op) == 0)
138 ;; Return 1 if OP is a multiple of 8 less than 64.
139 (define_predicate "mul8_operand"
140 (match_code "const_int")
142 unsigned HOST_WIDE_INT i = INTVAL (op);
143 return i < 64 && i % 8 == 0;
146 ;; Return 1 if OP is a hard floating-point register.
147 (define_predicate "hard_fp_register_operand"
148 (match_operand 0 "register_operand")
150 if (GET_CODE (op) == SUBREG)
151 op = SUBREG_REG (op);
152 return REGNO_REG_CLASS (REGNO (op)) == FLOAT_REGS;
155 ;; Return 1 if OP is a hard general register.
156 (define_predicate "hard_int_register_operand"
157 (match_operand 0 "register_operand")
159 if (GET_CODE (op) == SUBREG)
160 op = SUBREG_REG (op);
161 return REGNO_REG_CLASS (REGNO (op)) == GENERAL_REGS;
164 ;; Return 1 if OP is something that can be reloaded into a register;
165 ;; if it is a MEM, it need not be valid.
166 (define_predicate "some_operand"
167 (ior (match_code "reg,mem,const_int,const_double,const_vector,
168 label_ref,symbol_ref,const,high")
169 (and (match_code "subreg")
170 (match_test "some_operand (SUBREG_REG (op), VOIDmode)"))))
172 ;; Likewise, but don't accept constants.
173 (define_predicate "some_ni_operand"
174 (ior (match_code "reg,mem")
175 (and (match_code "subreg")
176 (match_test "some_ni_operand (SUBREG_REG (op), VOIDmode)"))))
178 ;; Return 1 if OP is a valid operand for the source of a move insn.
179 (define_predicate "input_operand"
180 (match_code "label_ref,symbol_ref,const,high,reg,subreg,mem,
181 const_double,const_vector,const_int")
183 switch (GET_CODE (op))
188 if (TARGET_EXPLICIT_RELOCS)
190 /* We don't split symbolic operands into something unintelligable
191 until after reload, but we do not wish non-small, non-global
192 symbolic operands to be reconstructed from their high/lo_sum
194 return (small_symbolic_operand (op, mode)
195 || global_symbolic_operand (op, mode)
196 || gotdtp_symbolic_operand (op, mode)
197 || gottp_symbolic_operand (op, mode));
200 /* This handles both the Windows/NT and OSF cases. */
201 return mode == ptr_mode || mode == DImode;
204 return (TARGET_EXPLICIT_RELOCS
205 && local_symbolic_operand (XEXP (op, 0), mode));
211 if (register_operand (op, mode))
213 /* ... fall through ... */
215 return ((TARGET_BWX || (mode != HImode && mode != QImode))
216 && general_operand (op, mode));
219 return op == CONST0_RTX (mode);
222 if (reload_in_progress || reload_completed)
223 return alpha_legitimate_constant_p (op);
224 return op == CONST0_RTX (mode);
227 if (mode == QImode || mode == HImode)
229 if (reload_in_progress || reload_completed)
230 return alpha_legitimate_constant_p (op);
231 return add_operand (op, mode);
239 ;; Return 1 if OP is a SYMBOL_REF for a function known to be in this
240 ;; file, and in the same section as the current function.
242 (define_predicate "samegp_function_operand"
243 (match_code "symbol_ref")
245 /* Easy test for recursion. */
246 if (op == XEXP (DECL_RTL (current_function_decl), 0))
249 /* Functions that are not local can be overridden, and thus may
250 not share the same gp. */
251 if (! SYMBOL_REF_LOCAL_P (op))
254 /* If -msmall-data is in effect, assume that there is only one GP
255 for the module, and so any local symbol has this property. We
256 need explicit relocations to be able to enforce this for symbols
257 not defined in this unit of translation, however. */
258 if (TARGET_EXPLICIT_RELOCS && TARGET_SMALL_DATA)
261 /* Functions that are not external are defined in this UoT,
262 and thus must share the same gp. */
263 return ! SYMBOL_REF_EXTERNAL_P (op);
266 ;; Return 1 if OP is a SYMBOL_REF for which we can make a call via bsr.
267 (define_predicate "direct_call_operand"
268 (match_operand 0 "samegp_function_operand")
270 tree op_decl, cfun_sec, op_sec;
272 /* If profiling is implemented via linker tricks, we can't jump
273 to the nogp alternate entry point. Note that current_function_profile
274 would not be correct, since that doesn't indicate if the target
275 function uses profiling. */
276 /* ??? TARGET_PROFILING_NEEDS_GP isn't really the right test,
277 but is approximately correct for the OSF ABIs. Don't know
278 what to do for VMS, NT, or UMK. */
279 if (!TARGET_PROFILING_NEEDS_GP && profile_flag)
282 /* Must be a function. In some cases folks create thunks in static
283 data structures and then make calls to them. If we allow the
284 direct call, we'll get an error from the linker about !samegp reloc
285 against a symbol without a .prologue directive. */
286 if (!SYMBOL_REF_FUNCTION_P (op))
289 /* Must be "near" so that the branch is assumed to reach. With
290 -msmall-text, this is assumed true of all local symbols. Since
291 we've already checked samegp, locality is already assured. */
292 if (TARGET_SMALL_TEXT)
295 /* Otherwise, a decl is "near" if it is defined in the same section. */
296 if (flag_function_sections)
299 op_decl = SYMBOL_REF_DECL (op);
300 if (DECL_ONE_ONLY (current_function_decl)
301 || (op_decl && DECL_ONE_ONLY (op_decl)))
304 cfun_sec = DECL_SECTION_NAME (current_function_decl);
305 op_sec = op_decl ? DECL_SECTION_NAME (op_decl) : NULL;
306 return ((!cfun_sec && !op_sec)
307 || (cfun_sec && op_sec
308 && strcmp (TREE_STRING_POINTER (cfun_sec),
309 TREE_STRING_POINTER (op_sec)) == 0));
312 ;; Return 1 if OP is a valid operand for the MEM of a CALL insn.
314 ;; For TARGET_ABI_OSF, we want to restrict to R27 or a pseudo.
315 ;; For TARGET_ABI_UNICOSMK, we want to restrict to registers.
317 (define_predicate "call_operand"
318 (if_then_else (match_code "reg")
319 (match_test "!TARGET_ABI_OSF
320 || REGNO (op) == 27 || REGNO (op) > LAST_VIRTUAL_REGISTER")
321 (and (match_test "!TARGET_ABI_UNICOSMK")
322 (match_code "symbol_ref"))))
324 ;; Return true if OP is a LABEL_REF, or SYMBOL_REF or CONST referencing
325 ;; a (non-tls) variable known to be defined in this file.
326 (define_predicate "local_symbolic_operand"
327 (match_code "label_ref,const,symbol_ref")
329 if (GET_CODE (op) == LABEL_REF)
332 if (GET_CODE (op) == CONST
333 && GET_CODE (XEXP (op, 0)) == PLUS
334 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
335 op = XEXP (XEXP (op, 0), 0);
337 if (GET_CODE (op) != SYMBOL_REF)
340 return SYMBOL_REF_LOCAL_P (op) && !SYMBOL_REF_TLS_MODEL (op);
343 ;; Return true if OP is a SYMBOL_REF or CONST referencing a variable
344 ;; known to be defined in this file in the small data area.
345 (define_predicate "small_symbolic_operand"
346 (match_code "const,symbol_ref")
348 if (! TARGET_SMALL_DATA)
351 if (GET_CODE (op) == CONST
352 && GET_CODE (XEXP (op, 0)) == PLUS
353 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
354 op = XEXP (XEXP (op, 0), 0);
356 if (GET_CODE (op) != SYMBOL_REF)
359 /* ??? There's no encode_section_info equivalent for the rtl
360 constant pool, so SYMBOL_FLAG_SMALL never gets set. */
361 if (CONSTANT_POOL_ADDRESS_P (op))
362 return GET_MODE_SIZE (get_pool_mode (op)) <= g_switch_value;
364 return (SYMBOL_REF_LOCAL_P (op)
365 && SYMBOL_REF_SMALL_P (op)
366 && SYMBOL_REF_TLS_MODEL (op) == 0);
369 ;; Return true if OP is a SYMBOL_REF or CONST referencing a variable
370 ;; not known (or known not) to be defined in this file.
371 (define_predicate "global_symbolic_operand"
372 (match_code "const,symbol_ref")
374 if (GET_CODE (op) == CONST
375 && GET_CODE (XEXP (op, 0)) == PLUS
376 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
377 op = XEXP (XEXP (op, 0), 0);
379 if (GET_CODE (op) != SYMBOL_REF)
382 return !SYMBOL_REF_LOCAL_P (op) && !SYMBOL_REF_TLS_MODEL (op);
385 ;; Returns 1 if OP is a symbolic operand, i.e. a symbol_ref or a label_ref,
386 ;; possibly with an offset.
387 (define_predicate "symbolic_operand"
388 (ior (match_code "symbol_ref,label_ref")
389 (and (match_code "const")
390 (match_test "GET_CODE (XEXP (op,0)) == PLUS
391 && GET_CODE (XEXP (XEXP (op,0), 0)) == SYMBOL_REF
392 && GET_CODE (XEXP (XEXP (op,0), 1)) == CONST_INT"))))
394 ;; Return true if OP is valid for 16-bit DTP relative relocations.
395 (define_predicate "dtp16_symbolic_operand"
396 (and (match_code "const")
397 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_DTPREL)")))
399 ;; Return true if OP is valid for 32-bit DTP relative relocations.
400 (define_predicate "dtp32_symbolic_operand"
401 (and (match_code "const")
402 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_DTPREL)")))
404 ;; Return true if OP is valid for 64-bit DTP relative relocations.
405 (define_predicate "gotdtp_symbolic_operand"
406 (and (match_code "const")
407 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_DTPREL)")))
409 ;; Return true if OP is valid for 16-bit TP relative relocations.
410 (define_predicate "tp16_symbolic_operand"
411 (and (match_code "const")
412 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_TPREL)")))
414 ;; Return true if OP is valid for 32-bit TP relative relocations.
415 (define_predicate "tp32_symbolic_operand"
416 (and (match_code "const")
417 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_TPREL)")))
419 ;; Return true if OP is valid for 64-bit TP relative relocations.
420 (define_predicate "gottp_symbolic_operand"
421 (and (match_code "const")
422 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_TPREL)")))
424 ;; Return 1 if this memory address is a known aligned register plus
425 ;; a constant. It must be a valid address. This means that we can do
426 ;; this as an aligned reference plus some offset.
428 ;; Take into account what reload will do. Oh god this is awful.
429 ;; The horrible comma-operator construct below is to prevent genrecog
430 ;; from thinking that this predicate accepts REG and SUBREG. We don't
431 ;; use recog during reload, so pretending these codes are accepted
432 ;; pessimizes things a tad.
434 (define_predicate "aligned_memory_operand"
435 (ior (match_test "op = resolve_reload_operand (op), 0")
440 if (MEM_ALIGN (op) >= 32)
444 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo)
445 sorts of constructs. Dig for the real base register. */
446 if (reload_in_progress
447 && GET_CODE (op) == PLUS
448 && GET_CODE (XEXP (op, 0)) == PLUS)
449 base = XEXP (XEXP (op, 0), 0);
452 if (! memory_address_p (mode, op))
454 base = (GET_CODE (op) == PLUS ? XEXP (op, 0) : op);
457 return (GET_CODE (base) == REG && REGNO_POINTER_ALIGN (REGNO (base)) >= 32);
460 ;; Similar, but return 1 if OP is a MEM which is not alignable.
462 (define_predicate "unaligned_memory_operand"
463 (ior (match_test "op = resolve_reload_operand (op), 0")
468 if (MEM_ALIGN (op) >= 32)
472 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo)
473 sorts of constructs. Dig for the real base register. */
474 if (reload_in_progress
475 && GET_CODE (op) == PLUS
476 && GET_CODE (XEXP (op, 0)) == PLUS)
477 base = XEXP (XEXP (op, 0), 0);
480 if (! memory_address_p (mode, op))
482 base = (GET_CODE (op) == PLUS ? XEXP (op, 0) : op);
485 return (GET_CODE (base) == REG && REGNO_POINTER_ALIGN (REGNO (base)) < 32);
488 ;; Return 1 if OP is any memory location. During reload a pseudo matches.
489 (define_predicate "any_memory_operand"
490 (ior (match_code "mem,reg")
491 (and (match_code "subreg")
492 (match_test "GET_CODE (SUBREG_REG (op)) == REG"))))
494 ;; Return 1 if OP is either a register or an unaligned memory location.
495 (define_predicate "reg_or_unaligned_mem_operand"
496 (ior (match_operand 0 "register_operand")
497 (match_operand 0 "unaligned_memory_operand")))
499 ;; Return 1 is OP is a memory location that is not a reference
500 ;; (using an AND) to an unaligned location. Take into account
501 ;; what reload will do.
502 (define_predicate "normal_memory_operand"
503 (ior (match_test "op = resolve_reload_operand (op), 0")
504 (and (match_code "mem")
505 (match_test "GET_CODE (XEXP (op, 0)) != AND"))))
507 ;; Returns 1 if OP is not an eliminable register.
509 ;; This exists to cure a pathological abort in the s8addq (et al) patterns,
511 ;; long foo () { long t; bar(); return (long) &t * 26107; }
513 ;; which run afoul of a hack in reload to cure a (presumably) similar
514 ;; problem with lea-type instructions on other targets. But there is
515 ;; one of us and many of them, so work around the problem by selectively
516 ;; preventing combine from making the optimization.
518 (define_predicate "reg_not_elim_operand"
519 (match_operand 0 "register_operand")
521 if (GET_CODE (op) == SUBREG)
522 op = SUBREG_REG (op);
523 return op != frame_pointer_rtx && op != arg_pointer_rtx;
526 ;; Accept a register, but not a subreg of any kind. This allows us to
527 ;; avoid pathological cases in reload wrt data movement common in
528 ;; int->fp conversion. */
529 (define_predicate "reg_no_subreg_operand"
530 (and (match_code "reg")
531 (match_operand 0 "register_operand")))
533 ;; Return 1 if OP is a valid Alpha comparison operator for "cmp" style
535 (define_predicate "alpha_comparison_operator"
536 (match_code "eq,le,lt,leu,ltu"))
538 ;; Similarly, but with swapped operands.
539 (define_predicate "alpha_swapped_comparison_operator"
540 (match_code "eq,ge,gt,gtu,gtu"))
542 ;; Return 1 if OP is a valid Alpha comparison operator against zero
543 ;; for "bcc" style instructions.
544 (define_predicate "alpha_zero_comparison_operator"
545 (match_code "eq,ne,le,lt,leu,ltu"))
547 ;; Return 1 if OP is a signed comparison operation.
548 (define_predicate "signed_comparison_operator"
549 (match_code "eq,ne,le,lt,ge,gt"))
551 ;; Return 1 if OP is a valid Alpha floating point comparison operator.
552 (define_predicate "alpha_fp_comparison_operator"
553 (match_code "eq,le,lt,unordered"))
555 ;; Return 1 if this is a divide or modulus operator.
556 (define_predicate "divmod_operator"
557 (match_code "div,mod,udiv,umod"))
559 ;; Return 1 if this is a float->int conversion operator.
560 (define_predicate "fix_operator"
561 (match_code "fix,unsigned_fix"))
563 ;; Recognize an addition operation that includes a constant. Used to
564 ;; convince reload to canonize (plus (plus reg c1) c2) during register
567 (define_predicate "addition_operation"
568 (and (match_code "plus")
569 (match_test "register_operand (XEXP (op, 0), mode)
570 && GET_CODE (XEXP (op, 1)) == CONST_INT
571 && CONST_OK_FOR_LETTER_P (INTVAL (XEXP (op, 1)), 'K')")))
573 ;; For TARGET_EXPLICIT_RELOCS, we don't obfuscate a SYMBOL_REF to a
574 ;; small symbolic operand until after reload. At which point we need
575 ;; to replace (mem (symbol_ref)) with (mem (lo_sum $29 symbol_ref))
576 ;; so that sched2 has the proper dependency information. */
577 (define_predicate "some_small_symbolic_operand"
578 (match_code "set,parallel,prefetch,unspec,unspec_volatile")
580 /* Avoid search unless necessary. */
581 if (!TARGET_EXPLICIT_RELOCS || !reload_completed)
583 return for_each_rtx (&op, some_small_symbolic_operand_int, NULL);