1 ;; Predicate definitions for ARM and Thumb
2 ;; Copyright (C) 2004-2013 Free Software Foundation, Inc.
3 ;; Contributed by ARM Ltd.
5 ;; This file is part of GCC.
7 ;; GCC is free software; you can redistribute it and/or modify it
8 ;; under the terms of the GNU General Public License as published
9 ;; by the Free Software Foundation; either version 3, or (at your
10 ;; option) any later version.
12 ;; GCC is distributed in the hope that it will be useful, but WITHOUT
13 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 ;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 ;; License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GCC; see the file COPYING3. If not see
19 ;; <http://www.gnu.org/licenses/>.
21 (define_predicate "s_register_operand"
22 (match_code "reg,subreg")
24 if (GET_CODE (op) == SUBREG)
26 /* We don't consider registers whose class is NO_REGS
27 to be a register operand. */
28 /* XXX might have to check for lo regs only for thumb ??? */
30 && (REGNO (op) >= FIRST_PSEUDO_REGISTER
31 || REGNO_REG_CLASS (REGNO (op)) != NO_REGS));
34 (define_predicate "imm_for_neon_inv_logic_operand"
35 (match_code "const_vector")
38 && neon_immediate_valid_for_logic (op, mode, 1, NULL, NULL));
41 (define_predicate "neon_inv_logic_op2"
42 (ior (match_operand 0 "imm_for_neon_inv_logic_operand")
43 (match_operand 0 "s_register_operand")))
45 (define_predicate "imm_for_neon_logic_operand"
46 (match_code "const_vector")
49 && neon_immediate_valid_for_logic (op, mode, 0, NULL, NULL));
52 (define_predicate "neon_logic_op2"
53 (ior (match_operand 0 "imm_for_neon_logic_operand")
54 (match_operand 0 "s_register_operand")))
56 ;; Any general register.
57 (define_predicate "arm_hard_general_register_operand"
60 return REGNO (op) <= LAST_ARM_REGNUM;
64 (define_predicate "low_register_operand"
65 (and (match_code "reg")
66 (match_test "REGNO (op) <= LAST_LO_REGNUM")))
68 ;; A low register or const_int.
69 (define_predicate "low_reg_or_int_operand"
70 (ior (match_code "const_int")
71 (match_operand 0 "low_register_operand")))
73 ;; Any core register, or any pseudo. */
74 (define_predicate "arm_general_register_operand"
75 (match_code "reg,subreg")
77 if (GET_CODE (op) == SUBREG)
81 && (REGNO (op) <= LAST_ARM_REGNUM
82 || REGNO (op) >= FIRST_PSEUDO_REGISTER));
85 (define_predicate "vfp_register_operand"
86 (match_code "reg,subreg")
88 if (GET_CODE (op) == SUBREG)
91 /* We don't consider registers whose class is NO_REGS
92 to be a register operand. */
94 && (REGNO (op) >= FIRST_PSEUDO_REGISTER
95 || REGNO_REG_CLASS (REGNO (op)) == VFP_D0_D7_REGS
96 || REGNO_REG_CLASS (REGNO (op)) == VFP_LO_REGS
98 && REGNO_REG_CLASS (REGNO (op)) == VFP_REGS)));
101 (define_predicate "vfp_hard_register_operand"
104 return (IS_VFP_REGNUM (REGNO (op)));
107 (define_predicate "zero_operand"
108 (and (match_code "const_int,const_double,const_vector")
109 (match_test "op == CONST0_RTX (mode)")))
111 ;; Match a register, or zero in the appropriate mode.
112 (define_predicate "reg_or_zero_operand"
113 (ior (match_operand 0 "s_register_operand")
114 (match_operand 0 "zero_operand")))
116 (define_special_predicate "subreg_lowpart_operator"
117 (and (match_code "subreg")
118 (match_test "subreg_lowpart_p (op)")))
120 ;; Reg, subreg(reg) or const_int.
121 (define_predicate "reg_or_int_operand"
122 (ior (match_code "const_int")
123 (match_operand 0 "s_register_operand")))
125 (define_predicate "arm_immediate_operand"
126 (and (match_code "const_int")
127 (match_test "const_ok_for_arm (INTVAL (op))")))
129 ;; A constant value which fits into two instructions, each taking
130 ;; an arithmetic constant operand for one of the words.
131 (define_predicate "arm_immediate_di_operand"
132 (and (match_code "const_int,const_double")
133 (match_test "arm_const_double_by_immediates (op)")))
135 (define_predicate "arm_neg_immediate_operand"
136 (and (match_code "const_int")
137 (match_test "const_ok_for_arm (-INTVAL (op))")))
139 (define_predicate "arm_not_immediate_operand"
140 (and (match_code "const_int")
141 (match_test "const_ok_for_arm (~INTVAL (op))")))
143 (define_predicate "const0_operand"
144 (and (match_code "const_int")
145 (match_test "INTVAL (op) == 0")))
147 ;; Something valid on the RHS of an ARM data-processing instruction
148 (define_predicate "arm_rhs_operand"
149 (ior (match_operand 0 "s_register_operand")
150 (match_operand 0 "arm_immediate_operand")))
152 (define_predicate "arm_rhsm_operand"
153 (ior (match_operand 0 "arm_rhs_operand")
154 (match_operand 0 "memory_operand")))
156 ;; This doesn't have to do much because the constant is already checked
157 ;; in the shift_operator predicate.
158 (define_predicate "shift_amount_operand"
159 (ior (and (match_test "TARGET_ARM")
160 (match_operand 0 "s_register_operand"))
161 (match_operand 0 "const_int_operand")))
163 (define_predicate "const_neon_scalar_shift_amount_operand"
164 (and (match_code "const_int")
165 (match_test "((unsigned HOST_WIDE_INT) INTVAL (op)) <= GET_MODE_BITSIZE (mode)
166 && ((unsigned HOST_WIDE_INT) INTVAL (op)) > 0")))
168 (define_predicate "ldrd_strd_offset_operand"
169 (and (match_operand 0 "const_int_operand")
170 (match_test "TARGET_LDRD && offset_ok_for_ldrd_strd (INTVAL (op))")))
172 (define_predicate "arm_add_operand"
173 (ior (match_operand 0 "arm_rhs_operand")
174 (match_operand 0 "arm_neg_immediate_operand")))
176 (define_predicate "arm_anddi_operand_neon"
177 (ior (match_operand 0 "s_register_operand")
178 (and (match_code "const_int")
179 (match_test "const_ok_for_dimode_op (INTVAL (op), AND)"))
180 (match_operand 0 "neon_inv_logic_op2")))
182 (define_predicate "arm_iordi_operand_neon"
183 (ior (match_operand 0 "s_register_operand")
184 (and (match_code "const_int")
185 (match_test "const_ok_for_dimode_op (INTVAL (op), IOR)"))
186 (match_operand 0 "neon_logic_op2")))
188 (define_predicate "arm_xordi_operand"
189 (ior (match_operand 0 "s_register_operand")
190 (and (match_code "const_int")
191 (match_test "const_ok_for_dimode_op (INTVAL (op), XOR)"))))
193 (define_predicate "arm_adddi_operand"
194 (ior (match_operand 0 "s_register_operand")
195 (and (match_code "const_int")
196 (match_test "const_ok_for_dimode_op (INTVAL (op), PLUS)"))))
198 (define_predicate "arm_addimm_operand"
199 (ior (match_operand 0 "arm_immediate_operand")
200 (match_operand 0 "arm_neg_immediate_operand")))
202 (define_predicate "arm_not_operand"
203 (ior (match_operand 0 "arm_rhs_operand")
204 (match_operand 0 "arm_not_immediate_operand")))
206 (define_predicate "arm_di_operand"
207 (ior (match_operand 0 "s_register_operand")
208 (match_operand 0 "arm_immediate_di_operand")))
210 ;; True if the operand is a memory reference which contains an
211 ;; offsettable address.
212 (define_predicate "offsettable_memory_operand"
213 (and (match_code "mem")
215 "offsettable_address_p (reload_completed | reload_in_progress,
216 mode, XEXP (op, 0))")))
218 ;; True if the operand is a memory operand that does not have an
219 ;; automodified base register (and thus will not generate output reloads).
220 (define_predicate "call_memory_operand"
221 (and (match_code "mem")
222 (and (match_test "GET_RTX_CLASS (GET_CODE (XEXP (op, 0)))
224 (match_operand 0 "memory_operand"))))
226 (define_predicate "arm_reload_memory_operand"
227 (and (match_code "mem,reg,subreg")
228 (match_test "(!CONSTANT_P (op)
229 && (true_regnum(op) == -1
231 && REGNO (op) >= FIRST_PSEUDO_REGISTER)))")))
233 (define_predicate "vfp_compare_operand"
234 (ior (match_operand 0 "s_register_operand")
235 (and (match_code "const_double")
236 (match_test "arm_const_double_rtx (op)"))))
238 (define_predicate "arm_float_compare_operand"
239 (if_then_else (match_test "TARGET_VFP")
240 (match_operand 0 "vfp_compare_operand")
241 (match_operand 0 "s_register_operand")))
243 ;; True for valid index operands.
244 (define_predicate "index_operand"
245 (ior (match_operand 0 "s_register_operand")
246 (and (match_operand 0 "immediate_operand")
247 (match_test "(!CONST_INT_P (op)
248 || (INTVAL (op) < 4096 && INTVAL (op) > -4096))"))))
250 ;; True for operators that can be combined with a shift in ARM state.
251 (define_special_predicate "shiftable_operator"
252 (and (match_code "plus,minus,ior,xor,and")
253 (match_test "mode == GET_MODE (op)")))
255 (define_special_predicate "shiftable_operator_strict_it"
256 (and (match_code "plus,and")
257 (match_test "mode == GET_MODE (op)")))
259 ;; True for logical binary operators.
260 (define_special_predicate "logical_binary_operator"
261 (and (match_code "ior,xor,and")
262 (match_test "mode == GET_MODE (op)")))
264 ;; True for commutative operators
265 (define_special_predicate "commutative_binary_operator"
266 (and (match_code "ior,xor,and,plus")
267 (match_test "mode == GET_MODE (op)")))
269 ;; True for shift operators.
271 ;; * mult is only permitted with a constant shift amount
272 ;; * patterns that permit register shift amounts only in ARM mode use
273 ;; shift_amount_operand, patterns that always allow registers do not,
274 ;; so we don't have to worry about that sort of thing here.
275 (define_special_predicate "shift_operator"
276 (and (ior (ior (and (match_code "mult")
277 (match_test "power_of_two_operand (XEXP (op, 1), mode)"))
278 (and (match_code "rotate")
279 (match_test "CONST_INT_P (XEXP (op, 1))
280 && ((unsigned HOST_WIDE_INT) INTVAL (XEXP (op, 1))) < 32")))
281 (and (match_code "ashift,ashiftrt,lshiftrt,rotatert")
282 (match_test "!CONST_INT_P (XEXP (op, 1))
283 || ((unsigned HOST_WIDE_INT) INTVAL (XEXP (op, 1))) < 32")))
284 (match_test "mode == GET_MODE (op)")))
286 ;; True for shift operators which can be used with saturation instructions.
287 (define_special_predicate "sat_shift_operator"
288 (and (ior (and (match_code "mult")
289 (match_test "power_of_two_operand (XEXP (op, 1), mode)"))
290 (and (match_code "ashift,ashiftrt")
291 (match_test "CONST_INT_P (XEXP (op, 1))
292 && ((unsigned HOST_WIDE_INT) INTVAL (XEXP (op, 1)) < 32)")))
293 (match_test "mode == GET_MODE (op)")))
295 ;; True for MULT, to identify which variant of shift_operator is in use.
296 (define_special_predicate "mult_operator"
299 ;; True for operators that have 16-bit thumb variants. */
300 (define_special_predicate "thumb_16bit_operator"
301 (match_code "plus,minus,and,ior,xor"))
304 (define_special_predicate "equality_operator"
305 (match_code "eq,ne"))
307 ;; True for integer comparisons and, if FP is active, for comparisons
308 ;; other than LTGT or UNEQ.
309 (define_special_predicate "expandable_comparison_operator"
310 (match_code "eq,ne,le,lt,ge,gt,geu,gtu,leu,ltu,
311 unordered,ordered,unlt,unle,unge,ungt"))
313 ;; Likewise, but only accept comparisons that are directly supported
314 ;; by ARM condition codes.
315 (define_special_predicate "arm_comparison_operator"
316 (and (match_operand 0 "expandable_comparison_operator")
317 (match_test "maybe_get_arm_condition_code (op) != ARM_NV")))
319 (define_special_predicate "lt_ge_comparison_operator"
320 (match_code "lt,ge"))
322 ;; The vsel instruction only accepts the ARM condition codes listed below.
323 (define_special_predicate "arm_vsel_comparison_operator"
324 (and (match_operand 0 "expandable_comparison_operator")
325 (match_test "maybe_get_arm_condition_code (op) == ARM_GE
326 || maybe_get_arm_condition_code (op) == ARM_GT
327 || maybe_get_arm_condition_code (op) == ARM_EQ
328 || maybe_get_arm_condition_code (op) == ARM_VS
329 || maybe_get_arm_condition_code (op) == ARM_LT
330 || maybe_get_arm_condition_code (op) == ARM_LE
331 || maybe_get_arm_condition_code (op) == ARM_NE
332 || maybe_get_arm_condition_code (op) == ARM_VC")))
334 (define_special_predicate "arm_cond_move_operator"
335 (if_then_else (match_test "arm_restrict_it")
336 (and (match_test "TARGET_FPU_ARMV8")
337 (match_operand 0 "arm_vsel_comparison_operator"))
338 (match_operand 0 "expandable_comparison_operator")))
340 (define_special_predicate "noov_comparison_operator"
341 (match_code "lt,ge,eq,ne"))
343 (define_special_predicate "minmax_operator"
344 (and (match_code "smin,smax,umin,umax")
345 (match_test "mode == GET_MODE (op)")))
347 (define_special_predicate "cc_register"
348 (and (match_code "reg")
349 (and (match_test "REGNO (op) == CC_REGNUM")
350 (ior (match_test "mode == GET_MODE (op)")
351 (match_test "mode == VOIDmode && GET_MODE_CLASS (GET_MODE (op)) == MODE_CC")))))
353 (define_special_predicate "dominant_cc_register"
356 if (mode == VOIDmode)
358 mode = GET_MODE (op);
360 if (GET_MODE_CLASS (mode) != MODE_CC)
364 return (cc_register (op, mode)
365 && (mode == CC_DNEmode
366 || mode == CC_DEQmode
367 || mode == CC_DLEmode
368 || mode == CC_DLTmode
369 || mode == CC_DGEmode
370 || mode == CC_DGTmode
371 || mode == CC_DLEUmode
372 || mode == CC_DLTUmode
373 || mode == CC_DGEUmode
374 || mode == CC_DGTUmode));
377 (define_special_predicate "arm_extendqisi_mem_op"
378 (and (match_operand 0 "memory_operand")
379 (match_test "TARGET_ARM ? arm_legitimate_address_outer_p (mode,
383 : memory_address_p (QImode, XEXP (op, 0))")))
385 (define_special_predicate "arm_reg_or_extendqisi_mem_op"
386 (ior (match_operand 0 "arm_extendqisi_mem_op")
387 (match_operand 0 "s_register_operand")))
389 (define_predicate "power_of_two_operand"
390 (match_code "const_int")
392 unsigned HOST_WIDE_INT value = INTVAL (op) & 0xffffffff;
394 return value != 0 && (value & (value - 1)) == 0;
397 (define_predicate "nonimmediate_di_operand"
398 (match_code "reg,subreg,mem")
400 if (s_register_operand (op, mode))
403 if (GET_CODE (op) == SUBREG)
404 op = SUBREG_REG (op);
406 return MEM_P (op) && memory_address_p (DImode, XEXP (op, 0));
409 (define_predicate "di_operand"
410 (ior (match_code "const_int,const_double")
411 (and (match_code "reg,subreg,mem")
412 (match_operand 0 "nonimmediate_di_operand"))))
414 (define_predicate "nonimmediate_soft_df_operand"
415 (match_code "reg,subreg,mem")
417 if (s_register_operand (op, mode))
420 if (GET_CODE (op) == SUBREG)
421 op = SUBREG_REG (op);
423 return MEM_P (op) && memory_address_p (DFmode, XEXP (op, 0));
426 (define_predicate "soft_df_operand"
427 (ior (match_code "const_double")
428 (and (match_code "reg,subreg,mem")
429 (match_operand 0 "nonimmediate_soft_df_operand"))))
431 (define_special_predicate "load_multiple_operation"
432 (match_code "parallel")
434 return ldm_stm_operation_p (op, /*load=*/true, SImode,
435 /*consecutive=*/false,
436 /*return_pc=*/false);
439 (define_special_predicate "store_multiple_operation"
440 (match_code "parallel")
442 return ldm_stm_operation_p (op, /*load=*/false, SImode,
443 /*consecutive=*/false,
444 /*return_pc=*/false);
447 (define_special_predicate "pop_multiple_return"
448 (match_code "parallel")
450 return ldm_stm_operation_p (op, /*load=*/true, SImode,
451 /*consecutive=*/false,
455 (define_special_predicate "pop_multiple_fp"
456 (match_code "parallel")
458 return ldm_stm_operation_p (op, /*load=*/true, DFmode,
459 /*consecutive=*/true,
460 /*return_pc=*/false);
463 (define_special_predicate "multi_register_push"
464 (match_code "parallel")
466 if ((GET_CODE (XVECEXP (op, 0, 0)) != SET)
467 || (GET_CODE (SET_SRC (XVECEXP (op, 0, 0))) != UNSPEC)
468 || (XINT (SET_SRC (XVECEXP (op, 0, 0)), 1) != UNSPEC_PUSH_MULT))
474 (define_predicate "push_mult_memory_operand"
477 /* ??? Given how PUSH_MULT is generated in the prologues, is there
478 any point in testing for thumb1 specially? All of the variants
479 use the same form. */
482 /* ??? No attempt is made to represent STMIA, or validate that
483 the stack adjustment matches the register count. This is
484 true of the ARM/Thumb2 path as well. */
485 rtx x = XEXP (op, 0);
486 if (GET_CODE (x) != PRE_MODIFY)
488 if (XEXP (x, 0) != stack_pointer_rtx)
491 if (GET_CODE (x) != PLUS)
493 if (XEXP (x, 0) != stack_pointer_rtx)
495 return CONST_INT_P (XEXP (x, 1));
498 /* ARM and Thumb2 handle pre-modify in their legitimate_address. */
499 return memory_operand (op, mode);
502 ;;-------------------------------------------------------------------------
507 (define_predicate "thumb1_cmp_operand"
508 (ior (and (match_code "reg,subreg")
509 (match_operand 0 "s_register_operand"))
510 (and (match_code "const_int")
511 (match_test "((unsigned HOST_WIDE_INT) INTVAL (op)) < 256"))))
513 (define_predicate "thumb1_cmpneg_operand"
514 (and (match_code "const_int")
515 (match_test "INTVAL (op) < 0 && INTVAL (op) > -256")))
517 ;; Return TRUE if a result can be stored in OP without clobbering the
518 ;; condition code register. Prior to reload we only accept a
519 ;; register. After reload we have to be able to handle memory as
520 ;; well, since a pseudo may not get a hard reg and reload cannot
521 ;; handle output-reloads on jump insns.
523 ;; We could possibly handle mem before reload as well, but that might
524 ;; complicate things with the need to handle increment
526 (define_predicate "thumb_cbrch_target_operand"
527 (and (match_code "reg,subreg,mem")
528 (ior (match_operand 0 "s_register_operand")
529 (and (match_test "reload_in_progress || reload_completed")
530 (match_operand 0 "memory_operand")))))
532 ;;-------------------------------------------------------------------------
537 (define_predicate "imm_or_reg_operand"
538 (ior (match_operand 0 "immediate_operand")
539 (match_operand 0 "register_operand")))
543 (define_predicate "const_multiple_of_8_operand"
544 (match_code "const_int")
546 unsigned HOST_WIDE_INT val = INTVAL (op);
547 return (val & 7) == 0;
550 (define_predicate "imm_for_neon_mov_operand"
551 (match_code "const_vector,const_int")
553 return neon_immediate_valid_for_move (op, mode, NULL, NULL);
556 (define_predicate "imm_for_neon_lshift_operand"
557 (match_code "const_vector")
559 return neon_immediate_valid_for_shift (op, mode, NULL, NULL, true);
562 (define_predicate "imm_for_neon_rshift_operand"
563 (match_code "const_vector")
565 return neon_immediate_valid_for_shift (op, mode, NULL, NULL, false);
568 (define_predicate "imm_lshift_or_reg_neon"
569 (ior (match_operand 0 "s_register_operand")
570 (match_operand 0 "imm_for_neon_lshift_operand")))
572 (define_predicate "imm_rshift_or_reg_neon"
573 (ior (match_operand 0 "s_register_operand")
574 (match_operand 0 "imm_for_neon_rshift_operand")))
576 ;; Predicates for named expanders that overlap multiple ISAs.
578 (define_predicate "cmpdi_operand"
579 (and (match_test "TARGET_32BIT")
580 (match_operand 0 "arm_di_operand")))
582 ;; True if the operand is memory reference suitable for a ldrex/strex.
583 (define_predicate "arm_sync_memory_operand"
584 (and (match_operand 0 "memory_operand")
585 (match_code "reg" "0")))
587 ;; Predicates for parallel expanders based on mode.
588 (define_special_predicate "vect_par_constant_high"
589 (match_code "parallel")
591 HOST_WIDE_INT count = XVECLEN (op, 0);
593 int base = GET_MODE_NUNITS (mode);
596 || (count != base/2))
599 if (!VECTOR_MODE_P (mode))
602 for (i = 0; i < count; i++)
604 rtx elt = XVECEXP (op, 0, i);
607 if (!CONST_INT_P (elt))
611 if (val != (base/2) + i)
617 (define_special_predicate "vect_par_constant_low"
618 (match_code "parallel")
620 HOST_WIDE_INT count = XVECLEN (op, 0);
622 int base = GET_MODE_NUNITS (mode);
625 || (count != base/2))
628 if (!VECTOR_MODE_P (mode))
631 for (i = 0; i < count; i++)
633 rtx elt = XVECEXP (op, 0, i);
636 if (!CONST_INT_P (elt))
646 (define_predicate "const_double_vcvt_power_of_two_reciprocal"
647 (and (match_code "const_double")
648 (match_test "TARGET_32BIT && TARGET_VFP
649 && vfp3_const_double_for_fract_bits (op)")))
651 (define_predicate "neon_struct_operand"
652 (and (match_code "mem")
653 (match_test "TARGET_32BIT && neon_vector_mem_operand (op, 2)")))
655 (define_predicate "neon_struct_or_register_operand"
656 (ior (match_operand 0 "neon_struct_operand")
657 (match_operand 0 "s_register_operand")))
659 (define_special_predicate "add_operator"
662 (define_predicate "mem_noofs_operand"
663 (and (match_code "mem")
664 (match_code "reg" "0")))
666 (define_predicate "call_insn_operand"
667 (ior (match_code "symbol_ref")
668 (match_operand 0 "s_register_operand")))