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 3, 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 COPYING3. If not see
18 ;; <http://www.gnu.org/licenses/>.
20 ;; Return 1 if OP is the zero constant for MODE.
21 (define_predicate "const0_operand"
22 (and (match_code "const_int,const_double,const_vector")
23 (match_test "op == CONST0_RTX (mode)")))
25 ;; Returns true if OP is either the constant zero or a register.
26 (define_predicate "reg_or_0_operand"
27 (ior (match_operand 0 "register_operand")
28 (match_operand 0 "const0_operand")))
30 ;; Return 1 if OP is a constant in the range of 0-63 (for a shift) or
32 (define_predicate "reg_or_6bit_operand"
33 (if_then_else (match_code "const_int")
34 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 64")
35 (match_operand 0 "register_operand")))
37 ;; Return 1 if OP is an 8-bit constant.
38 (define_predicate "cint8_operand"
39 (and (match_code "const_int")
40 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 256")))
42 ;; Return 1 if OP is an 8-bit constant or any register.
43 (define_predicate "reg_or_8bit_operand"
44 (if_then_else (match_code "const_int")
45 (match_test "INTVAL (op) >= 0 && INTVAL (op) < 256")
46 (match_operand 0 "register_operand")))
48 ;; Return 1 if OP is a constant or any register.
49 (define_predicate "reg_or_cint_operand"
50 (ior (match_operand 0 "register_operand")
51 (match_operand 0 "const_int_operand")))
53 ;; Return 1 if the operand is a valid second operand to an add insn.
54 (define_predicate "add_operand"
55 (if_then_else (match_code "const_int")
56 (match_test "satisfies_constraint_K (op) || satisfies_constraint_L (op)")
57 (match_operand 0 "register_operand")))
59 ;; Return 1 if the operand is a valid second operand to a
60 ;; sign-extending add insn.
61 (define_predicate "sext_add_operand"
62 (if_then_else (match_code "const_int")
63 (match_test "satisfies_constraint_I (op) || satisfies_constraint_O (op)")
64 (match_operand 0 "register_operand")))
66 ;; Return 1 if the operand is a non-symbolic constant operand that
67 ;; does not satisfy add_operand.
68 (define_predicate "non_add_const_operand"
69 (and (match_code "const_int,const_double,const_vector")
70 (not (match_operand 0 "add_operand"))))
72 ;; Return 1 if the operand is a non-symbolic, nonzero constant operand.
73 (define_predicate "non_zero_const_operand"
74 (and (match_code "const_int,const_double,const_vector")
75 (match_test "op != CONST0_RTX (mode)")))
77 ;; Return 1 if OP is the constant 4 or 8.
78 (define_predicate "const48_operand"
79 (and (match_code "const_int")
80 (match_test "INTVAL (op) == 4 || INTVAL (op) == 8")))
82 ;; Return 1 if OP is a valid first operand to an AND insn.
83 (define_predicate "and_operand"
84 (if_then_else (match_code "const_int")
85 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100
86 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100
87 || zap_mask (INTVAL (op))")
88 (if_then_else (match_code "const_double")
89 (match_test "GET_MODE (op) == VOIDmode
90 && zap_mask (CONST_DOUBLE_LOW (op))
91 && zap_mask (CONST_DOUBLE_HIGH (op))")
92 (match_operand 0 "register_operand"))))
94 ;; Return 1 if OP is a valid first operand to an IOR or XOR insn.
95 (define_predicate "or_operand"
96 (if_then_else (match_code "const_int")
97 (match_test "(unsigned HOST_WIDE_INT) INTVAL (op) < 0x100
98 || (unsigned HOST_WIDE_INT) ~ INTVAL (op) < 0x100")
99 (match_operand 0 "register_operand")))
101 ;; Return 1 if OP is a constant that is the width, in bits, of an integral
102 ;; mode not larger than DImode.
103 (define_predicate "mode_width_operand"
104 (match_code "const_int")
106 HOST_WIDE_INT i = INTVAL (op);
107 return i == 8 || i == 16 || i == 32 || i == 64;
110 ;; Return 1 if OP is a constant that is a mask of ones of width of an
111 ;; integral machine mode not larger than DImode.
112 (define_predicate "mode_mask_operand"
113 (match_code "const_int,const_double")
115 if (GET_CODE (op) == CONST_INT)
117 HOST_WIDE_INT value = INTVAL (op);
123 if (value == 0xffffffff)
128 else if (HOST_BITS_PER_WIDE_INT == 32 && GET_CODE (op) == CONST_DOUBLE)
130 if (CONST_DOUBLE_LOW (op) == 0xffffffff && CONST_DOUBLE_HIGH (op) == 0)
136 ;; Return 1 if OP is a multiple of 8 less than 64.
137 (define_predicate "mul8_operand"
138 (match_code "const_int")
140 unsigned HOST_WIDE_INT i = INTVAL (op);
141 return i < 64 && i % 8 == 0;
144 ;; Return 1 if OP is a hard floating-point register.
145 (define_predicate "hard_fp_register_operand"
146 (match_operand 0 "register_operand")
148 if (GET_CODE (op) == SUBREG)
149 op = SUBREG_REG (op);
150 return REGNO_REG_CLASS (REGNO (op)) == FLOAT_REGS;
153 ;; Return 1 if OP is a hard general register.
154 (define_predicate "hard_int_register_operand"
155 (match_operand 0 "register_operand")
157 if (GET_CODE (op) == SUBREG)
158 op = SUBREG_REG (op);
159 return REGNO_REG_CLASS (REGNO (op)) == GENERAL_REGS;
162 ;; Return 1 if OP is something that can be reloaded into a register;
163 ;; if it is a MEM, it need not be valid.
164 (define_predicate "some_operand"
165 (ior (match_code "reg,mem,const_int,const_double,const_vector,
166 label_ref,symbol_ref,const,high")
167 (and (match_code "subreg")
168 (match_test "some_operand (SUBREG_REG (op), VOIDmode)"))))
170 ;; Likewise, but don't accept constants.
171 (define_predicate "some_ni_operand"
172 (ior (match_code "reg,mem")
173 (and (match_code "subreg")
174 (match_test "some_ni_operand (SUBREG_REG (op), VOIDmode)"))))
176 ;; Return 1 if OP is a valid operand for the source of a move insn.
177 (define_predicate "input_operand"
178 (match_code "label_ref,symbol_ref,const,high,reg,subreg,mem,
179 const_double,const_vector,const_int")
181 switch (GET_CODE (op))
186 if (TARGET_EXPLICIT_RELOCS)
188 /* We don't split symbolic operands into something unintelligable
189 until after reload, but we do not wish non-small, non-global
190 symbolic operands to be reconstructed from their high/lo_sum
192 return (small_symbolic_operand (op, mode)
193 || global_symbolic_operand (op, mode)
194 || gotdtp_symbolic_operand (op, mode)
195 || gottp_symbolic_operand (op, mode));
198 /* This handles both the Windows/NT and OSF cases. */
199 return mode == ptr_mode || mode == DImode;
202 return (TARGET_EXPLICIT_RELOCS
203 && local_symbolic_operand (XEXP (op, 0), mode));
209 if (register_operand (op, mode))
211 /* ... fall through ... */
213 return ((TARGET_BWX || (mode != HImode && mode != QImode))
214 && general_operand (op, mode));
217 return op == CONST0_RTX (mode);
220 if (reload_in_progress || reload_completed)
221 return alpha_legitimate_constant_p (op);
222 return op == CONST0_RTX (mode);
225 if (mode == QImode || mode == HImode)
227 if (reload_in_progress || reload_completed)
228 return alpha_legitimate_constant_p (op);
229 return add_operand (op, mode);
237 ;; Return 1 if OP is a SYMBOL_REF for a function known to be in this
238 ;; file, and in the same section as the current function.
240 (define_predicate "samegp_function_operand"
241 (match_code "symbol_ref")
243 /* Easy test for recursion. */
244 if (op == XEXP (DECL_RTL (current_function_decl), 0))
247 /* Functions that are not local can be overridden, and thus may
248 not share the same gp. */
249 if (! SYMBOL_REF_LOCAL_P (op))
252 /* If -msmall-data is in effect, assume that there is only one GP
253 for the module, and so any local symbol has this property. We
254 need explicit relocations to be able to enforce this for symbols
255 not defined in this unit of translation, however. */
256 if (TARGET_EXPLICIT_RELOCS && TARGET_SMALL_DATA)
259 /* Functions that are not external are defined in this UoT,
260 and thus must share the same gp. */
261 return ! SYMBOL_REF_EXTERNAL_P (op);
264 ;; Return 1 if OP is a SYMBOL_REF for which we can make a call via bsr.
265 (define_predicate "direct_call_operand"
266 (match_operand 0 "samegp_function_operand")
268 tree op_decl, cfun_sec, op_sec;
270 /* If profiling is implemented via linker tricks, we can't jump
271 to the nogp alternate entry point. Note that crtl->profile
272 would not be correct, since that doesn't indicate if the target
273 function uses profiling. */
274 /* ??? TARGET_PROFILING_NEEDS_GP isn't really the right test,
275 but is approximately correct for the OSF ABIs. Don't know
276 what to do for VMS, NT, or UMK. */
277 if (!TARGET_PROFILING_NEEDS_GP && profile_flag)
280 /* Must be a function. In some cases folks create thunks in static
281 data structures and then make calls to them. If we allow the
282 direct call, we'll get an error from the linker about !samegp reloc
283 against a symbol without a .prologue directive. */
284 if (!SYMBOL_REF_FUNCTION_P (op))
287 /* Must be "near" so that the branch is assumed to reach. With
288 -msmall-text, this is assumed true of all local symbols. Since
289 we've already checked samegp, locality is already assured. */
290 if (TARGET_SMALL_TEXT)
293 /* Otherwise, a decl is "near" if it is defined in the same section. */
294 if (flag_function_sections)
297 op_decl = SYMBOL_REF_DECL (op);
298 if (DECL_ONE_ONLY (current_function_decl)
299 || (op_decl && DECL_ONE_ONLY (op_decl)))
302 cfun_sec = DECL_SECTION_NAME (current_function_decl);
303 op_sec = op_decl ? DECL_SECTION_NAME (op_decl) : NULL;
304 return ((!cfun_sec && !op_sec)
305 || (cfun_sec && op_sec
306 && strcmp (TREE_STRING_POINTER (cfun_sec),
307 TREE_STRING_POINTER (op_sec)) == 0));
310 ;; Return 1 if OP is a valid operand for the MEM of a CALL insn.
312 ;; For TARGET_ABI_OSF, we want to restrict to R27 or a pseudo.
313 ;; For TARGET_ABI_UNICOSMK, we want to restrict to registers.
315 (define_predicate "call_operand"
316 (if_then_else (match_code "reg")
317 (match_test "!TARGET_ABI_OSF
318 || REGNO (op) == 27 || REGNO (op) > LAST_VIRTUAL_REGISTER")
319 (and (match_test "!TARGET_ABI_UNICOSMK")
320 (match_code "symbol_ref"))))
322 ;; Return true if OP is a LABEL_REF, or SYMBOL_REF or CONST referencing
323 ;; a (non-tls) variable known to be defined in this file.
324 (define_predicate "local_symbolic_operand"
325 (match_code "label_ref,const,symbol_ref")
327 if (GET_CODE (op) == LABEL_REF)
330 if (GET_CODE (op) == CONST
331 && GET_CODE (XEXP (op, 0)) == PLUS
332 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
333 op = XEXP (XEXP (op, 0), 0);
335 if (GET_CODE (op) != SYMBOL_REF)
338 return (SYMBOL_REF_LOCAL_P (op)
339 && !SYMBOL_REF_WEAK (op)
340 && !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_WEAK (op)
367 && !SYMBOL_REF_TLS_MODEL (op));
370 ;; Return true if OP is a SYMBOL_REF or CONST referencing a variable
371 ;; not known (or known not) to be defined in this file.
372 (define_predicate "global_symbolic_operand"
373 (match_code "const,symbol_ref")
375 if (GET_CODE (op) == CONST
376 && GET_CODE (XEXP (op, 0)) == PLUS
377 && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
378 op = XEXP (XEXP (op, 0), 0);
380 if (GET_CODE (op) != SYMBOL_REF)
383 return ((!SYMBOL_REF_LOCAL_P (op) || SYMBOL_REF_WEAK (op))
384 && !SYMBOL_REF_TLS_MODEL (op));
387 ;; Returns 1 if OP is a symbolic operand, i.e. a symbol_ref or a label_ref,
388 ;; possibly with an offset.
389 (define_predicate "symbolic_operand"
390 (ior (match_code "symbol_ref,label_ref")
391 (and (match_code "const")
392 (match_test "GET_CODE (XEXP (op,0)) == PLUS
393 && GET_CODE (XEXP (XEXP (op,0), 0)) == SYMBOL_REF
394 && GET_CODE (XEXP (XEXP (op,0), 1)) == CONST_INT"))))
396 ;; Return true if OP is valid for 16-bit DTP relative relocations.
397 (define_predicate "dtp16_symbolic_operand"
398 (and (match_code "const")
399 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_DTPREL)")))
401 ;; Return true if OP is valid for 32-bit DTP relative relocations.
402 (define_predicate "dtp32_symbolic_operand"
403 (and (match_code "const")
404 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_DTPREL)")))
406 ;; Return true if OP is valid for 64-bit DTP relative relocations.
407 (define_predicate "gotdtp_symbolic_operand"
408 (and (match_code "const")
409 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_DTPREL)")))
411 ;; Return true if OP is valid for 16-bit TP relative relocations.
412 (define_predicate "tp16_symbolic_operand"
413 (and (match_code "const")
414 (match_test "tls_symbolic_operand_1 (op, 16, UNSPEC_TPREL)")))
416 ;; Return true if OP is valid for 32-bit TP relative relocations.
417 (define_predicate "tp32_symbolic_operand"
418 (and (match_code "const")
419 (match_test "tls_symbolic_operand_1 (op, 32, UNSPEC_TPREL)")))
421 ;; Return true if OP is valid for 64-bit TP relative relocations.
422 (define_predicate "gottp_symbolic_operand"
423 (and (match_code "const")
424 (match_test "tls_symbolic_operand_1 (op, 64, UNSPEC_TPREL)")))
426 ;; Return 1 if this memory address is a known aligned register plus
427 ;; a constant. It must be a valid address. This means that we can do
428 ;; this as an aligned reference plus some offset.
430 ;; Take into account what reload will do. Oh god this is awful.
431 ;; The horrible comma-operator construct below is to prevent genrecog
432 ;; from thinking that this predicate accepts REG and SUBREG. We don't
433 ;; use recog during reload, so pretending these codes are accepted
434 ;; pessimizes things a tad.
436 (define_special_predicate "aligned_memory_operand"
437 (ior (match_test "op = resolve_reload_operand (op), 0")
442 if (MEM_ALIGN (op) >= 32)
446 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo)
447 sorts of constructs. Dig for the real base register. */
448 if (reload_in_progress
449 && GET_CODE (op) == PLUS
450 && GET_CODE (XEXP (op, 0)) == PLUS)
451 base = XEXP (XEXP (op, 0), 0);
454 if (! memory_address_p (mode, op))
456 base = (GET_CODE (op) == PLUS ? XEXP (op, 0) : op);
459 return (GET_CODE (base) == REG && REGNO_POINTER_ALIGN (REGNO (base)) >= 32);
462 ;; Similar, but return 1 if OP is a MEM which is not alignable.
464 (define_special_predicate "unaligned_memory_operand"
465 (ior (match_test "op = resolve_reload_operand (op), 0")
470 if (MEM_ALIGN (op) >= 32)
474 /* LEGITIMIZE_RELOAD_ADDRESS creates (plus (plus reg const_hi) const_lo)
475 sorts of constructs. Dig for the real base register. */
476 if (reload_in_progress
477 && GET_CODE (op) == PLUS
478 && GET_CODE (XEXP (op, 0)) == PLUS)
479 base = XEXP (XEXP (op, 0), 0);
482 if (! memory_address_p (mode, op))
484 base = (GET_CODE (op) == PLUS ? XEXP (op, 0) : op);
487 return (GET_CODE (base) == REG && REGNO_POINTER_ALIGN (REGNO (base)) < 32);
490 ;; Return 1 if OP is any memory location. During reload a pseudo matches.
491 (define_special_predicate "any_memory_operand"
492 (match_code "mem,reg,subreg")
494 if (GET_CODE (op) == SUBREG)
495 op = SUBREG_REG (op);
499 if (reload_in_progress && REG_P (op))
501 unsigned regno = REGNO (op);
502 if (HARD_REGISTER_NUM_P (regno))
505 return reg_renumber[regno] < 0;
511 ;; Return 1 is OP is a memory location that is not a reference
512 ;; (using an AND) to an unaligned location. Take into account
513 ;; what reload will do.
514 (define_special_predicate "normal_memory_operand"
515 (ior (match_test "op = resolve_reload_operand (op), 0")
516 (and (match_code "mem")
517 (match_test "GET_CODE (XEXP (op, 0)) != AND"))))
519 ;; Returns 1 if OP is not an eliminable register.
521 ;; This exists to cure a pathological failure in the s8addq (et al) patterns,
523 ;; long foo () { long t; bar(); return (long) &t * 26107; }
525 ;; which run afoul of a hack in reload to cure a (presumably) similar
526 ;; problem with lea-type instructions on other targets. But there is
527 ;; one of us and many of them, so work around the problem by selectively
528 ;; preventing combine from making the optimization.
530 (define_predicate "reg_not_elim_operand"
531 (match_operand 0 "register_operand")
533 if (GET_CODE (op) == SUBREG)
534 op = SUBREG_REG (op);
535 return op != frame_pointer_rtx && op != arg_pointer_rtx;
538 ;; Accept a register, but not a subreg of any kind. This allows us to
539 ;; avoid pathological cases in reload wrt data movement common in
540 ;; int->fp conversion. */
541 (define_predicate "reg_no_subreg_operand"
542 (and (match_code "reg")
543 (match_operand 0 "register_operand")))
545 ;; Return 1 if OP is a valid Alpha comparison operator for "cmp" style
547 (define_predicate "alpha_comparison_operator"
548 (match_code "eq,le,lt,leu,ltu"))
550 ;; Similarly, but with swapped operands.
551 (define_predicate "alpha_swapped_comparison_operator"
552 (match_code "eq,ge,gt,gtu"))
554 ;; Return 1 if OP is a valid Alpha comparison operator against zero
555 ;; for "bcc" style instructions.
556 (define_predicate "alpha_zero_comparison_operator"
557 (match_code "eq,ne,le,lt,leu,ltu"))
559 ;; Return 1 if OP is a signed comparison operation.
560 (define_predicate "signed_comparison_operator"
561 (match_code "eq,ne,le,lt,ge,gt"))
563 ;; Return 1 if OP is a valid Alpha floating point comparison operator.
564 (define_predicate "alpha_fp_comparison_operator"
565 (match_code "eq,le,lt,unordered"))
567 ;; Return 1 if this is a divide or modulus operator.
568 (define_predicate "divmod_operator"
569 (match_code "div,mod,udiv,umod"))
571 ;; Return 1 if this is a float->int conversion operator.
572 (define_predicate "fix_operator"
573 (match_code "fix,unsigned_fix"))
575 ;; Recognize an addition operation that includes a constant. Used to
576 ;; convince reload to canonize (plus (plus reg c1) c2) during register
579 (define_predicate "addition_operation"
580 (and (match_code "plus")
581 (match_test "register_operand (XEXP (op, 0), mode)
582 && satisfies_constraint_K (XEXP (op, 1))")))
584 ;; For TARGET_EXPLICIT_RELOCS, we don't obfuscate a SYMBOL_REF to a
585 ;; small symbolic operand until after reload. At which point we need
586 ;; to replace (mem (symbol_ref)) with (mem (lo_sum $29 symbol_ref))
587 ;; so that sched2 has the proper dependency information. */
588 (define_predicate "some_small_symbolic_operand"
589 (match_code "set,parallel,prefetch,unspec,unspec_volatile")
591 /* Avoid search unless necessary. */
592 if (!TARGET_EXPLICIT_RELOCS || !reload_completed)
594 return for_each_rtx (&op, some_small_symbolic_operand_int, NULL);