1 ;; Predicate definitions for IA-32 and x86-64.
2 ;; Copyright (C) 2004, 2005, 2006 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 nonzero if OP is either a i387 or SSE fp register.
22 (define_predicate "any_fp_register_operand"
23 (and (match_code "reg")
24 (match_test "ANY_FP_REGNO_P (REGNO (op))")))
26 ;; Return nonzero if OP is an i387 fp register.
27 (define_predicate "fp_register_operand"
28 (and (match_code "reg")
29 (match_test "FP_REGNO_P (REGNO (op))")))
31 ;; Return nonzero if OP is a non-fp register_operand.
32 (define_predicate "register_and_not_any_fp_reg_operand"
33 (and (match_code "reg")
34 (not (match_test "ANY_FP_REGNO_P (REGNO (op))"))))
36 ;; Return nonzero if OP is a register operand other than an i387 fp register.
37 (define_predicate "register_and_not_fp_reg_operand"
38 (and (match_code "reg")
39 (not (match_test "FP_REGNO_P (REGNO (op))"))))
41 ;; True if the operand is an MMX register.
42 (define_predicate "mmx_reg_operand"
43 (and (match_code "reg")
44 (match_test "MMX_REGNO_P (REGNO (op))")))
46 ;; True if the operand is a Q_REGS class register.
47 (define_predicate "q_regs_operand"
48 (match_operand 0 "register_operand")
50 if (GET_CODE (op) == SUBREG)
52 return ANY_QI_REG_P (op);
55 ;; Match an SI or HImode register for a zero_extract.
56 (define_special_predicate "ext_register_operand"
57 (match_operand 0 "register_operand")
59 if ((!TARGET_64BIT || GET_MODE (op) != DImode)
60 && GET_MODE (op) != SImode && GET_MODE (op) != HImode)
62 if (GET_CODE (op) == SUBREG)
65 /* Be careful to accept only registers having upper parts. */
66 return REGNO (op) > LAST_VIRTUAL_REGISTER || REGNO (op) < 4;
69 ;; Return true if op is the AX register.
70 (define_predicate "ax_reg_operand"
71 (and (match_code "reg")
72 (match_test "REGNO (op) == 0")))
74 ;; Return true if op is the flags register.
75 (define_predicate "flags_reg_operand"
76 (and (match_code "reg")
77 (match_test "REGNO (op) == FLAGS_REG")))
79 ;; Return 1 if VALUE can be stored in a sign extended immediate field.
80 (define_predicate "x86_64_immediate_operand"
81 (match_code "const_int,symbol_ref,label_ref,const")
84 return immediate_operand (op, mode);
86 switch (GET_CODE (op))
89 /* CONST_DOUBLES never match, since HOST_BITS_PER_WIDE_INT is known
90 to be at least 32 and this all acceptable constants are
91 represented as CONST_INT. */
92 if (HOST_BITS_PER_WIDE_INT == 32)
96 HOST_WIDE_INT val = trunc_int_for_mode (INTVAL (op), DImode);
97 return trunc_int_for_mode (val, SImode) == val;
102 /* For certain code models, the symbolic references are known to fit.
103 in CM_SMALL_PIC model we know it fits if it is local to the shared
104 library. Don't count TLS SYMBOL_REFs here, since they should fit
105 only if inside of UNSPEC handled below. */
106 /* TLS symbols are not constant. */
107 if (SYMBOL_REF_TLS_MODEL (op))
109 return (ix86_cmodel == CM_SMALL || ix86_cmodel == CM_KERNEL
110 || (ix86_cmodel == CM_MEDIUM && !SYMBOL_REF_FAR_ADDR_P (op)));
113 /* For certain code models, the code is near as well. */
114 return (ix86_cmodel == CM_SMALL || ix86_cmodel == CM_MEDIUM
115 || ix86_cmodel == CM_KERNEL);
118 /* We also may accept the offsetted memory references in certain
120 if (GET_CODE (XEXP (op, 0)) == UNSPEC)
121 switch (XINT (XEXP (op, 0), 1))
123 case UNSPEC_GOTPCREL:
125 case UNSPEC_GOTNTPOFF:
132 if (GET_CODE (XEXP (op, 0)) == PLUS)
134 rtx op1 = XEXP (XEXP (op, 0), 0);
135 rtx op2 = XEXP (XEXP (op, 0), 1);
136 HOST_WIDE_INT offset;
138 if (ix86_cmodel == CM_LARGE)
140 if (!CONST_INT_P (op2))
142 offset = trunc_int_for_mode (INTVAL (op2), DImode);
143 switch (GET_CODE (op1))
146 /* TLS symbols are not constant. */
147 if (SYMBOL_REF_TLS_MODEL (op1))
149 /* For CM_SMALL assume that latest object is 16MB before
150 end of 31bits boundary. We may also accept pretty
151 large negative constants knowing that all objects are
152 in the positive half of address space. */
153 if ((ix86_cmodel == CM_SMALL
154 || (ix86_cmodel == CM_MEDIUM
155 && !SYMBOL_REF_FAR_ADDR_P (op1)))
156 && offset < 16*1024*1024
157 && trunc_int_for_mode (offset, SImode) == offset)
159 /* For CM_KERNEL we know that all object resist in the
160 negative half of 32bits address space. We may not
161 accept negative offsets, since they may be just off
162 and we may accept pretty large positive ones. */
163 if (ix86_cmodel == CM_KERNEL
165 && trunc_int_for_mode (offset, SImode) == offset)
170 /* These conditions are similar to SYMBOL_REF ones, just the
171 constraints for code models differ. */
172 if ((ix86_cmodel == CM_SMALL || ix86_cmodel == CM_MEDIUM)
173 && offset < 16*1024*1024
174 && trunc_int_for_mode (offset, SImode) == offset)
176 if (ix86_cmodel == CM_KERNEL
178 && trunc_int_for_mode (offset, SImode) == offset)
183 switch (XINT (op1, 1))
188 && trunc_int_for_mode (offset, SImode) == offset)
206 ;; Return 1 if VALUE can be stored in the zero extended immediate field.
207 (define_predicate "x86_64_zext_immediate_operand"
208 (match_code "const_double,const_int,symbol_ref,label_ref,const")
210 switch (GET_CODE (op))
213 if (HOST_BITS_PER_WIDE_INT == 32)
214 return (GET_MODE (op) == VOIDmode && !CONST_DOUBLE_HIGH (op));
219 if (HOST_BITS_PER_WIDE_INT == 32)
220 return INTVAL (op) >= 0;
222 return !(INTVAL (op) & ~(HOST_WIDE_INT) 0xffffffff);
225 /* For certain code models, the symbolic references are known to fit. */
226 /* TLS symbols are not constant. */
227 if (SYMBOL_REF_TLS_MODEL (op))
229 return (ix86_cmodel == CM_SMALL
230 || (ix86_cmodel == CM_MEDIUM
231 && !SYMBOL_REF_FAR_ADDR_P (op)));
234 /* For certain code models, the code is near as well. */
235 return ix86_cmodel == CM_SMALL || ix86_cmodel == CM_MEDIUM;
238 /* We also may accept the offsetted memory references in certain
240 if (GET_CODE (XEXP (op, 0)) == PLUS)
242 rtx op1 = XEXP (XEXP (op, 0), 0);
243 rtx op2 = XEXP (XEXP (op, 0), 1);
245 if (ix86_cmodel == CM_LARGE)
247 switch (GET_CODE (op1))
250 /* TLS symbols are not constant. */
251 if (SYMBOL_REF_TLS_MODEL (op1))
253 /* For small code model we may accept pretty large positive
254 offsets, since one bit is available for free. Negative
255 offsets are limited by the size of NULL pointer area
256 specified by the ABI. */
257 if ((ix86_cmodel == CM_SMALL
258 || (ix86_cmodel == CM_MEDIUM
259 && !SYMBOL_REF_FAR_ADDR_P (op1)))
261 && trunc_int_for_mode (INTVAL (op2), DImode) > -0x10000
262 && trunc_int_for_mode (INTVAL (op2), SImode) == INTVAL (op2))
264 /* ??? For the kernel, we may accept adjustment of
265 -0x10000000, since we know that it will just convert
266 negative address space to positive, but perhaps this
267 is not worthwhile. */
271 /* These conditions are similar to SYMBOL_REF ones, just the
272 constraints for code models differ. */
273 if ((ix86_cmodel == CM_SMALL || ix86_cmodel == CM_MEDIUM)
275 && trunc_int_for_mode (INTVAL (op2), DImode) > -0x10000
276 && trunc_int_for_mode (INTVAL (op2), SImode) == INTVAL (op2))
292 ;; Return nonzero if OP is general operand representable on x86_64.
293 (define_predicate "x86_64_general_operand"
294 (if_then_else (match_test "TARGET_64BIT")
295 (ior (match_operand 0 "nonimmediate_operand")
296 (match_operand 0 "x86_64_immediate_operand"))
297 (match_operand 0 "general_operand")))
299 ;; Return nonzero if OP is general operand representable on x86_64
300 ;; as either sign extended or zero extended constant.
301 (define_predicate "x86_64_szext_general_operand"
302 (if_then_else (match_test "TARGET_64BIT")
303 (ior (match_operand 0 "nonimmediate_operand")
304 (ior (match_operand 0 "x86_64_immediate_operand")
305 (match_operand 0 "x86_64_zext_immediate_operand")))
306 (match_operand 0 "general_operand")))
308 ;; Return nonzero if OP is nonmemory operand representable on x86_64.
309 (define_predicate "x86_64_nonmemory_operand"
310 (if_then_else (match_test "TARGET_64BIT")
311 (ior (match_operand 0 "register_operand")
312 (match_operand 0 "x86_64_immediate_operand"))
313 (match_operand 0 "nonmemory_operand")))
315 ;; Return nonzero if OP is nonmemory operand representable on x86_64.
316 (define_predicate "x86_64_szext_nonmemory_operand"
317 (if_then_else (match_test "TARGET_64BIT")
318 (ior (match_operand 0 "register_operand")
319 (ior (match_operand 0 "x86_64_immediate_operand")
320 (match_operand 0 "x86_64_zext_immediate_operand")))
321 (match_operand 0 "nonmemory_operand")))
323 ;; Return true when operand is PIC expression that can be computed by lea
325 (define_predicate "pic_32bit_operand"
326 (match_code "const,symbol_ref,label_ref")
330 /* Rule out relocations that translate into 64bit constants. */
331 if (TARGET_64BIT && GET_CODE (op) == CONST)
334 if (GET_CODE (op) == PLUS && CONST_INT_P (XEXP (op, 1)))
336 if (GET_CODE (op) == UNSPEC
337 && (XINT (op, 1) == UNSPEC_GOTOFF
338 || XINT (op, 1) == UNSPEC_GOT))
341 return symbolic_operand (op, mode);
345 ;; Return nonzero if OP is nonmemory operand acceptable by movabs patterns.
346 (define_predicate "x86_64_movabs_operand"
347 (if_then_else (match_test "!TARGET_64BIT || !flag_pic")
348 (match_operand 0 "nonmemory_operand")
349 (ior (match_operand 0 "register_operand")
350 (and (match_operand 0 "const_double_operand")
351 (match_test "GET_MODE_SIZE (mode) <= 8")))))
353 ;; Returns nonzero if OP is either a symbol reference or a sum of a symbol
354 ;; reference and a constant.
355 (define_predicate "symbolic_operand"
356 (match_code "symbol_ref,label_ref,const")
358 switch (GET_CODE (op))
366 if (GET_CODE (op) == SYMBOL_REF
367 || GET_CODE (op) == LABEL_REF
368 || (GET_CODE (op) == UNSPEC
369 && (XINT (op, 1) == UNSPEC_GOT
370 || XINT (op, 1) == UNSPEC_GOTOFF
371 || XINT (op, 1) == UNSPEC_GOTPCREL)))
373 if (GET_CODE (op) != PLUS
374 || !CONST_INT_P (XEXP (op, 1)))
378 if (GET_CODE (op) == SYMBOL_REF
379 || GET_CODE (op) == LABEL_REF)
381 /* Only @GOTOFF gets offsets. */
382 if (GET_CODE (op) != UNSPEC
383 || XINT (op, 1) != UNSPEC_GOTOFF)
386 op = XVECEXP (op, 0, 0);
387 if (GET_CODE (op) == SYMBOL_REF
388 || GET_CODE (op) == LABEL_REF)
397 ;; Return true if the operand contains a @GOT or @GOTOFF reference.
398 (define_predicate "pic_symbolic_operand"
404 if (GET_CODE (op) == UNSPEC
405 && XINT (op, 1) == UNSPEC_GOTPCREL)
407 if (GET_CODE (op) == PLUS
408 && GET_CODE (XEXP (op, 0)) == UNSPEC
409 && XINT (XEXP (op, 0), 1) == UNSPEC_GOTPCREL)
414 if (GET_CODE (op) == UNSPEC)
416 if (GET_CODE (op) != PLUS
417 || !CONST_INT_P (XEXP (op, 1)))
420 if (GET_CODE (op) == UNSPEC)
426 ;; Return true if OP is a symbolic operand that resolves locally.
427 (define_predicate "local_symbolic_operand"
428 (match_code "const,label_ref,symbol_ref")
430 if (GET_CODE (op) == CONST
431 && GET_CODE (XEXP (op, 0)) == PLUS
432 && CONST_INT_P (XEXP (XEXP (op, 0), 1)))
433 op = XEXP (XEXP (op, 0), 0);
435 if (GET_CODE (op) == LABEL_REF)
438 if (GET_CODE (op) != SYMBOL_REF)
441 if (SYMBOL_REF_TLS_MODEL (op) != 0)
444 if (SYMBOL_REF_LOCAL_P (op))
447 /* There is, however, a not insubstantial body of code in the rest of
448 the compiler that assumes it can just stick the results of
449 ASM_GENERATE_INTERNAL_LABEL in a symbol_ref and have done. */
450 /* ??? This is a hack. Should update the body of the compiler to
451 always create a DECL an invoke targetm.encode_section_info. */
452 if (strncmp (XSTR (op, 0), internal_label_prefix,
453 internal_label_prefix_len) == 0)
459 ;; Test for various thread-local symbols.
460 (define_predicate "tls_symbolic_operand"
461 (and (match_code "symbol_ref")
462 (match_test "SYMBOL_REF_TLS_MODEL (op) != 0")))
464 (define_predicate "tls_modbase_operand"
465 (and (match_code "symbol_ref")
466 (match_test "op == ix86_tls_module_base ()")))
468 (define_predicate "tp_or_register_operand"
469 (ior (match_operand 0 "register_operand")
470 (and (match_code "unspec")
471 (match_test "XINT (op, 1) == UNSPEC_TP"))))
473 ;; Test for a pc-relative call operand
474 (define_predicate "constant_call_address_operand"
475 (ior (match_code "symbol_ref")
476 (match_operand 0 "local_symbolic_operand")))
478 ;; True for any non-virtual or eliminable register. Used in places where
479 ;; instantiation of such a register may cause the pattern to not be recognized.
480 (define_predicate "register_no_elim_operand"
481 (match_operand 0 "register_operand")
483 if (GET_CODE (op) == SUBREG)
484 op = SUBREG_REG (op);
485 return !(op == arg_pointer_rtx
486 || op == frame_pointer_rtx
487 || (REGNO (op) >= FIRST_PSEUDO_REGISTER
488 && REGNO (op) <= LAST_VIRTUAL_REGISTER));
491 ;; Similarly, but include the stack pointer. This is used to prevent esp
492 ;; from being used as an index reg.
493 (define_predicate "index_register_operand"
494 (match_operand 0 "register_operand")
496 if (GET_CODE (op) == SUBREG)
497 op = SUBREG_REG (op);
498 if (reload_in_progress || reload_completed)
499 return REG_OK_FOR_INDEX_STRICT_P (op);
501 return REG_OK_FOR_INDEX_NONSTRICT_P (op);
504 ;; Return false if this is any eliminable register. Otherwise general_operand.
505 (define_predicate "general_no_elim_operand"
506 (if_then_else (match_code "reg,subreg")
507 (match_operand 0 "register_no_elim_operand")
508 (match_operand 0 "general_operand")))
510 ;; Return false if this is any eliminable register. Otherwise
511 ;; register_operand or a constant.
512 (define_predicate "nonmemory_no_elim_operand"
513 (ior (match_operand 0 "register_no_elim_operand")
514 (match_operand 0 "immediate_operand")))
516 ;; Test for a valid operand for a call instruction.
517 (define_predicate "call_insn_operand"
518 (ior (match_operand 0 "constant_call_address_operand")
519 (ior (match_operand 0 "register_no_elim_operand")
520 (match_operand 0 "memory_operand"))))
522 ;; Similarly, but for tail calls, in which we cannot allow memory references.
523 (define_predicate "sibcall_insn_operand"
524 (ior (match_operand 0 "constant_call_address_operand")
525 (match_operand 0 "register_no_elim_operand")))
527 ;; Match exactly zero.
528 (define_predicate "const0_operand"
529 (match_code "const_int,const_double,const_vector")
531 if (mode == VOIDmode)
532 mode = GET_MODE (op);
533 return op == CONST0_RTX (mode);
536 ;; Match exactly one.
537 (define_predicate "const1_operand"
538 (and (match_code "const_int")
539 (match_test "op == const1_rtx")))
541 ;; Match exactly eight.
542 (define_predicate "const8_operand"
543 (and (match_code "const_int")
544 (match_test "INTVAL (op) == 8")))
546 ;; Match 2, 4, or 8. Used for leal multiplicands.
547 (define_predicate "const248_operand"
548 (match_code "const_int")
550 HOST_WIDE_INT i = INTVAL (op);
551 return i == 2 || i == 4 || i == 8;
555 (define_predicate "const_0_to_1_operand"
556 (and (match_code "const_int")
557 (match_test "op == const0_rtx || op == const1_rtx")))
560 (define_predicate "const_0_to_3_operand"
561 (and (match_code "const_int")
562 (match_test "INTVAL (op) >= 0 && INTVAL (op) <= 3")))
565 (define_predicate "const_0_to_7_operand"
566 (and (match_code "const_int")
567 (match_test "INTVAL (op) >= 0 && INTVAL (op) <= 7")))
570 (define_predicate "const_0_to_15_operand"
571 (and (match_code "const_int")
572 (match_test "INTVAL (op) >= 0 && INTVAL (op) <= 15")))
575 (define_predicate "const_0_to_63_operand"
576 (and (match_code "const_int")
577 (match_test "INTVAL (op) >= 0 && INTVAL (op) <= 63")))
580 (define_predicate "const_0_to_255_operand"
581 (and (match_code "const_int")
582 (match_test "INTVAL (op) >= 0 && INTVAL (op) <= 255")))
584 ;; Match (0 to 255) * 8
585 (define_predicate "const_0_to_255_mul_8_operand"
586 (match_code "const_int")
588 unsigned HOST_WIDE_INT val = INTVAL (op);
589 return val <= 255*8 && val % 8 == 0;
592 ;; Return nonzero if OP is CONST_INT >= 1 and <= 31 (a valid operand
593 ;; for shift & compare patterns, as shifting by 0 does not change flags).
594 (define_predicate "const_1_to_31_operand"
595 (and (match_code "const_int")
596 (match_test "INTVAL (op) >= 1 && INTVAL (op) <= 31")))
599 (define_predicate "const_2_to_3_operand"
600 (and (match_code "const_int")
601 (match_test "INTVAL (op) == 2 || INTVAL (op) == 3")))
604 (define_predicate "const_4_to_7_operand"
605 (and (match_code "const_int")
606 (match_test "INTVAL (op) >= 4 && INTVAL (op) <= 7")))
608 ;; Match exactly one bit in 4-bit mask.
609 (define_predicate "const_pow2_1_to_8_operand"
610 (match_code "const_int")
612 unsigned int log = exact_log2 (INTVAL (op));
616 ;; Match exactly one bit in 8-bit mask.
617 (define_predicate "const_pow2_1_to_128_operand"
618 (match_code "const_int")
620 unsigned int log = exact_log2 (INTVAL (op));
624 ;; True if this is a constant appropriate for an increment or decrement.
625 (define_predicate "incdec_operand"
626 (match_code "const_int")
628 /* On Pentium4, the inc and dec operations causes extra dependency on flag
629 registers, since carry flag is not set. */
630 if (!TARGET_USE_INCDEC && !optimize_size)
632 return op == const1_rtx || op == constm1_rtx;
635 ;; True for registers, or 1 or -1. Used to optimize double-word shifts.
636 (define_predicate "reg_or_pm1_operand"
637 (ior (match_operand 0 "register_operand")
638 (and (match_code "const_int")
639 (match_test "op == const1_rtx || op == constm1_rtx"))))
641 ;; True if OP is acceptable as operand of DImode shift expander.
642 (define_predicate "shiftdi_operand"
643 (if_then_else (match_test "TARGET_64BIT")
644 (match_operand 0 "nonimmediate_operand")
645 (match_operand 0 "register_operand")))
647 (define_predicate "ashldi_input_operand"
648 (if_then_else (match_test "TARGET_64BIT")
649 (match_operand 0 "nonimmediate_operand")
650 (match_operand 0 "reg_or_pm1_operand")))
652 ;; Return true if OP is a vector load from the constant pool with just
653 ;; the first element nonzero.
654 (define_predicate "zero_extended_scalar_load_operand"
658 op = maybe_get_pool_constant (op);
661 if (GET_CODE (op) != CONST_VECTOR)
664 (GET_MODE_SIZE (GET_MODE (op)) /
665 GET_MODE_SIZE (GET_MODE_INNER (GET_MODE (op))));
666 for (n_elts--; n_elts > 0; n_elts--)
668 rtx elt = CONST_VECTOR_ELT (op, n_elts);
669 if (elt != CONST0_RTX (GET_MODE_INNER (GET_MODE (op))))
675 /* Return true if operand is a vector constant that is all ones. */
676 (define_predicate "vector_all_ones_operand"
677 (match_code "const_vector")
679 int nunits = GET_MODE_NUNITS (mode);
681 if (GET_CODE (op) == CONST_VECTOR
682 && CONST_VECTOR_NUNITS (op) == nunits)
685 for (i = 0; i < nunits; ++i)
687 rtx x = CONST_VECTOR_ELT (op, i);
688 if (x != constm1_rtx)
697 ; Return 1 when OP is operand acceptable for standard SSE move.
698 (define_predicate "vector_move_operand"
699 (ior (match_operand 0 "nonimmediate_operand")
700 (match_operand 0 "const0_operand")))
702 ;; Return 1 when OP is nonimmediate or standard SSE constant.
703 (define_predicate "nonimmediate_or_sse_const_operand"
704 (match_operand 0 "general_operand")
706 if (nonimmediate_operand (op, mode))
708 if (standard_sse_constant_p (op) > 0)
713 ;; Return true if OP is a register or a zero.
714 (define_predicate "reg_or_0_operand"
715 (ior (match_operand 0 "register_operand")
716 (match_operand 0 "const0_operand")))
718 ;; Return true if op if a valid address, and does not contain
719 ;; a segment override.
720 (define_special_predicate "no_seg_address_operand"
721 (match_operand 0 "address_operand")
723 struct ix86_address parts;
726 ok = ix86_decompose_address (op, &parts);
728 return parts.seg == SEG_DEFAULT;
731 ;; Return nonzero if the rtx is known to be at least 32 bits aligned.
732 (define_predicate "aligned_operand"
733 (match_operand 0 "general_operand")
735 struct ix86_address parts;
738 /* Registers and immediate operands are always "aligned". */
739 if (GET_CODE (op) != MEM)
742 /* All patterns using aligned_operand on memory operands ends up
743 in promoting memory operand to 64bit and thus causing memory mismatch. */
744 if (TARGET_MEMORY_MISMATCH_STALL && !optimize_size)
747 /* Don't even try to do any aligned optimizations with volatiles. */
748 if (MEM_VOLATILE_P (op))
751 if (MEM_ALIGN (op) >= 32)
756 /* Pushes and pops are only valid on the stack pointer. */
757 if (GET_CODE (op) == PRE_DEC
758 || GET_CODE (op) == POST_INC)
761 /* Decode the address. */
762 ok = ix86_decompose_address (op, &parts);
765 /* Look for some component that isn't known to be aligned. */
768 if (REGNO_POINTER_ALIGN (REGNO (parts.index)) * parts.scale < 32)
773 if (REGNO_POINTER_ALIGN (REGNO (parts.base)) < 32)
778 if (!CONST_INT_P (parts.disp)
779 || (INTVAL (parts.disp) & 3) != 0)
783 /* Didn't find one -- this must be an aligned address. */
787 ;; Returns 1 if OP is memory operand with a displacement.
788 (define_predicate "memory_displacement_operand"
789 (match_operand 0 "memory_operand")
791 struct ix86_address parts;
794 ok = ix86_decompose_address (XEXP (op, 0), &parts);
796 return parts.disp != NULL_RTX;
799 ;; Returns 1 if OP is memory operand with a displacement only.
800 (define_predicate "memory_displacement_only_operand"
801 (match_operand 0 "memory_operand")
803 struct ix86_address parts;
806 ok = ix86_decompose_address (XEXP (op, 0), &parts);
809 if (parts.base || parts.index)
812 return parts.disp != NULL_RTX;
815 ;; Returns 1 if OP is memory operand that cannot be represented
816 ;; by the modRM array.
817 (define_predicate "long_memory_operand"
818 (and (match_operand 0 "memory_operand")
819 (match_test "memory_address_length (op) != 0")))
821 ;; Return 1 if OP is a comparison operator that can be issued by fcmov.
822 (define_predicate "fcmov_comparison_operator"
823 (match_operand 0 "comparison_operator")
825 enum machine_mode inmode = GET_MODE (XEXP (op, 0));
826 enum rtx_code code = GET_CODE (op);
828 if (inmode == CCFPmode || inmode == CCFPUmode)
830 enum rtx_code second_code, bypass_code;
831 ix86_fp_comparison_codes (code, &bypass_code, &code, &second_code);
832 if (bypass_code != UNKNOWN || second_code != UNKNOWN)
834 code = ix86_fp_compare_code_to_integer (code);
836 /* i387 supports just limited amount of conditional codes. */
839 case LTU: case GTU: case LEU: case GEU:
840 if (inmode == CCmode || inmode == CCFPmode || inmode == CCFPUmode)
843 case ORDERED: case UNORDERED:
851 ;; Return 1 if OP is a comparison that can be used in the CMPSS/CMPPS insns.
852 ;; The first set are supported directly; the second set can't be done with
853 ;; full IEEE support, i.e. NaNs.
855 ;; ??? It would seem that we have a lot of uses of this predicate that pass
856 ;; it the wrong mode. We got away with this because the old function didn't
857 ;; check the mode at all. Mirror that for now by calling this a special
860 (define_special_predicate "sse_comparison_operator"
861 (match_code "eq,lt,le,unordered,ne,unge,ungt,ordered"))
863 ;; Return 1 if OP is a valid comparison operator in valid mode.
864 (define_predicate "ix86_comparison_operator"
865 (match_operand 0 "comparison_operator")
867 enum machine_mode inmode = GET_MODE (XEXP (op, 0));
868 enum rtx_code code = GET_CODE (op);
870 if (inmode == CCFPmode || inmode == CCFPUmode)
872 enum rtx_code second_code, bypass_code;
873 ix86_fp_comparison_codes (code, &bypass_code, &code, &second_code);
874 return (bypass_code == UNKNOWN && second_code == UNKNOWN);
881 if (inmode == CCmode || inmode == CCGCmode
882 || inmode == CCGOCmode || inmode == CCNOmode)
885 case LTU: case GTU: case LEU: case ORDERED: case UNORDERED: case GEU:
886 if (inmode == CCmode)
890 if (inmode == CCmode || inmode == CCGCmode || inmode == CCNOmode)
898 ;; Return 1 if OP is a valid comparison operator testing carry flag to be set.
899 (define_predicate "ix86_carry_flag_operator"
900 (match_code "ltu,lt,unlt,gt,ungt,le,unle,ge,unge,ltgt,uneq")
902 enum machine_mode inmode = GET_MODE (XEXP (op, 0));
903 enum rtx_code code = GET_CODE (op);
905 if (!REG_P (XEXP (op, 0))
906 || REGNO (XEXP (op, 0)) != FLAGS_REG
907 || XEXP (op, 1) != const0_rtx)
910 if (inmode == CCFPmode || inmode == CCFPUmode)
912 enum rtx_code second_code, bypass_code;
913 ix86_fp_comparison_codes (code, &bypass_code, &code, &second_code);
914 if (bypass_code != UNKNOWN || second_code != UNKNOWN)
916 code = ix86_fp_compare_code_to_integer (code);
918 else if (inmode != CCmode)
924 ;; Nearly general operand, but accept any const_double, since we wish
925 ;; to be able to drop them into memory rather than have them get pulled
927 (define_predicate "cmp_fp_expander_operand"
928 (ior (match_code "const_double")
929 (match_operand 0 "general_operand")))
931 ;; Return true if this is a valid binary floating-point operation.
932 (define_predicate "binary_fp_operator"
933 (match_code "plus,minus,mult,div"))
935 ;; Return true if this is a multiply operation.
936 (define_predicate "mult_operator"
939 ;; Return true if this is a division operation.
940 (define_predicate "div_operator"
943 ;; Return true if this is a float extend operation.
944 (define_predicate "float_operator"
945 (match_code "float"))
947 ;; Return true for ARITHMETIC_P.
948 (define_predicate "arith_or_logical_operator"
949 (match_code "plus,mult,and,ior,xor,smin,smax,umin,umax,compare,minus,div,
950 mod,udiv,umod,ashift,rotate,ashiftrt,lshiftrt,rotatert"))
952 ;; Return 1 if OP is a binary operator that can be promoted to wider mode.
953 ;; Modern CPUs have same latency for HImode and SImode multiply,
954 ;; but 386 and 486 do HImode multiply faster. */
955 (define_predicate "promotable_binary_operator"
956 (ior (match_code "plus,and,ior,xor,ashift")
957 (and (match_code "mult")
958 (match_test "ix86_tune > PROCESSOR_I486"))))
960 ;; To avoid problems when jump re-emits comparisons like testqi_ext_ccno_0,
961 ;; re-recognize the operand to avoid a copy_to_mode_reg that will fail.
963 ;; ??? It seems likely that this will only work because cmpsi is an
964 ;; expander, and no actual insns use this.
966 (define_predicate "cmpsi_operand"
967 (ior (match_operand 0 "nonimmediate_operand")
968 (and (match_code "and")
969 (match_code "zero_extract" "0")
970 (match_code "const_int" "1")
971 (match_code "const_int" "01")
972 (match_code "const_int" "02")
973 (match_test "INTVAL (XEXP (XEXP (op, 0), 1)) == 8")
974 (match_test "INTVAL (XEXP (XEXP (op, 0), 2)) == 8")
977 (define_predicate "compare_operator"
978 (match_code "compare"))
980 (define_predicate "absneg_operator"
981 (match_code "abs,neg"))