1 ;; Constraint definitions for ARM and Thumb
2 ;; Copyright (C) 2006-2025 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.
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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 ;; The following register constraints have been used:
22 ;; - in ARM/Thumb-2 state: t, w, x, y, z
23 ;; - in Thumb state: h, b
24 ;; - in both states: l, c, k, q, Cs, Ts, US
25 ;; In ARM state, 'l' is an alias for 'r'
26 ;; 'f' and 'v' were previously used for FPA and MAVERICK registers.
28 ;; The following normal constraints have been used:
29 ;; in ARM/Thumb-2 state: G, I, j, J, K, L, M
30 ;; in Thumb-1 state: I, J, K, L, M, N, O
31 ;; 'H' was previously used for FPA.
33 ;; The following multi-letter normal constraints have been used:
34 ;; in ARM/Thumb-2 state: Da, Db, Dc, Dd, Dn, DN, Dm, Dl, DL, Do, Dv, Dy, Di,
35 ;; Dj, Ds, Dt, Dp, Dz, Tu, Te
36 ;; in Thumb-1 state: Pa, Pb, Pc, Pd, Pe
37 ;; in Thumb-2 state: Ha, Pj, PJ, Ps, Pt, Pu, Pv, Pw, Px, Py, Pz, Rd, Rf, Rb, Ra,
41 ;; The following memory constraints have been used:
42 ;; in ARM/Thumb-2 state: Uh, Ut, Uv, Uy, Un, Um, Us, Uo, Up, Uf, Ux, Ul, Uz
44 ;; in Thumb state: Uu, Uw
47 (define_register_constraint "Up" "TARGET_HAVE_MVE ? VPR_REG : NO_REGS"
50 (define_memory_constraint "Ul"
52 In ARM/Thumb-2 state a valid address for load instruction with XEXP (op, 0)
53 being label of the literal data item to be loaded."
54 (and (match_code "mem")
55 (match_test "TARGET_HAVE_MVE && reload_completed
56 && (GET_CODE (XEXP (op, 0)) == LABEL_REF
57 || (GET_CODE (XEXP (op, 0)) == CONST
58 && GET_CODE (XEXP (XEXP (op, 0), 0)) == PLUS
59 && GET_CODE (XEXP (XEXP (XEXP (op, 0), 0), 0)) == LABEL_REF
60 && CONST_INT_P (XEXP (XEXP (XEXP (op, 0), 0), 1))))")))
62 (define_register_constraint "Uf" "TARGET_HAVE_MVE ? VFPCC_REG : NO_REGS"
65 (define_register_constraint "Te" "TARGET_HAVE_MVE ? EVEN_REG : NO_REGS"
66 "EVEN core registers @code{r0}, @code{r2}, @code{r4}, @code{r6}, @code{r8},
67 @code{r10}, @code{r12}, @code{r14}")
69 (define_constraint "Rd"
70 "@internal In Thumb-2 state a constant in range 1 to 16"
71 (and (match_code "const_int")
72 (match_test "TARGET_HAVE_MVE && ival >= 1 && ival <= 16")))
74 (define_constraint "Ra"
75 "@internal In Thumb-2 state a constant in range 0 to 7"
76 (and (match_code "const_int")
77 (match_test "TARGET_HAVE_MVE && ival >= 0 && ival <= 7")))
79 (define_constraint "Rb"
80 "@internal In Thumb-2 state a constant in range 1 to 8"
81 (and (match_code "const_int")
82 (match_test "TARGET_HAVE_MVE && ival >= 1 && ival <= 8")))
84 (define_constraint "Rc"
85 "@internal In Thumb-2 state a constant in range 0 to 15"
86 (and (match_code "const_int")
87 (match_test "TARGET_HAVE_MVE && ival >= 0 && ival <= 15")))
89 (define_constraint "Re"
90 "@internal In Thumb-2 state a constant in range 0 to 31"
91 (and (match_code "const_int")
92 (match_test "TARGET_HAVE_MVE && ival >= 0 && ival <= 31")))
94 (define_constraint "Rf"
95 "@internal In Thumb-2 state a constant in range 1 to 32"
96 (and (match_code "const_int")
97 (match_test "TARGET_HAVE_MVE && ival >= 1 && ival <= 32")))
99 (define_constraint "Rg"
100 "@internal In Thumb-2 state a constant is one among 1, 2, 4 and 8"
101 (and (match_code "const_int")
102 (match_test "TARGET_HAVE_MVE && ((ival == 1) || (ival == 2)
103 || (ival == 4) || (ival == 8))")))
105 (define_register_constraint "t" "TARGET_32BIT ? VFP_LO_REGS : NO_REGS"
106 "The VFP registers @code{s0}-@code{s31}.")
108 (define_register_constraint "w"
109 "TARGET_32BIT ? (TARGET_VFPD32 ? VFP_REGS : VFP_LO_REGS) : NO_REGS"
110 "The VFP registers @code{d0}-@code{d15}, or @code{d0}-@code{d31} for VFPv3.")
112 (define_register_constraint "x" "TARGET_32BIT ? VFP_D0_D7_REGS : NO_REGS"
113 "The VFP registers @code{d0}-@code{d7}.")
115 (define_register_constraint "y" "TARGET_REALLY_IWMMXT ? IWMMXT_REGS : NO_REGS"
116 "The Intel iWMMX co-processor registers.")
118 (define_register_constraint "z"
119 "TARGET_REALLY_IWMMXT ? IWMMXT_GR_REGS : NO_REGS"
120 "The Intel iWMMX GR registers.")
122 (define_register_constraint "l" "TARGET_THUMB ? LO_REGS : GENERAL_REGS"
123 "In Thumb state the core registers @code{r0}-@code{r7}.")
125 (define_register_constraint "h" "TARGET_THUMB ? HI_REGS : NO_REGS"
126 "In Thumb state the core registers @code{r8}-@code{r15}.")
128 (define_constraint "j"
129 "A constant suitable for a MOVW instruction. (ARM/Thumb-2)"
130 (and (match_test "TARGET_HAVE_MOVT")
131 (ior (and (match_code "high")
132 (match_test "arm_valid_symbolic_address_p (XEXP (op, 0))"))
133 (and (match_code "const_int")
134 (match_test "(ival & 0xffff0000) == 0")))))
136 (define_constraint "Pj"
137 "@internal A 12-bit constant suitable for an ADDW or SUBW instruction. (Thumb-2)"
138 (and (match_code "const_int")
139 (and (match_test "TARGET_THUMB2")
140 (match_test "(ival & 0xfffff000) == 0"))))
142 (define_constraint "PJ"
143 "@internal A constant that satisfies the Pj constrant if negated."
144 (and (match_code "const_int")
145 (and (match_test "TARGET_THUMB2")
146 (match_test "((-ival) & 0xfffff000) == 0"))))
148 (define_register_constraint "k" "STACK_REG"
149 "@internal The stack register.")
151 (define_register_constraint "b" "TARGET_THUMB ? BASE_REGS : NO_REGS"
153 Thumb only. The union of the low registers and the stack register.")
155 (define_constraint "c"
156 "@internal The condition code register."
157 (match_operand 0 "cc_register"))
159 (define_register_constraint "Cs" "CALLER_SAVE_REGS"
160 "@internal The caller save registers. Useful for sibcalls.")
162 (define_constraint "I"
163 "In ARM/Thumb-2 state a constant that can be used as an immediate value in a
164 Data Processing instruction. In Thumb-1 state a constant in the range
166 (and (match_code "const_int")
167 (match_test "TARGET_32BIT ? const_ok_for_arm (ival)
168 : ival >= 0 && ival <= 255")))
170 (define_constraint "J"
171 "In ARM/Thumb-2 state a constant in the range @minus{}4095-4095. In Thumb-1
172 state a constant in the range @minus{}255-@minus{}1."
173 (and (match_code "const_int")
174 (match_test "TARGET_32BIT ? (ival >= -4095 && ival <= 4095)
175 : (ival >= -255 && ival <= -1)")))
177 (define_constraint "K"
178 "In ARM/Thumb-2 state a constant that satisfies the @code{I} constraint if
179 inverted. In Thumb-1 state a constant that satisfies the @code{I}
180 constraint multiplied by any power of 2."
181 (and (match_code "const_int")
182 (match_test "TARGET_32BIT ? const_ok_for_arm (~ival)
183 : thumb_shiftable_const (ival)")))
185 (define_constraint "L"
186 "In ARM/Thumb-2 state a constant that satisfies the @code{I} constraint if
187 negated. In Thumb-1 state a constant in the range @minus{}7-7."
188 (and (match_code "const_int")
189 (match_test "TARGET_32BIT ? const_ok_for_arm (-ival)
190 : (ival >= -7 && ival <= 7)")))
192 ;; The ARM state version is internal...
193 ;; @internal In ARM/Thumb-2 state a constant in the range 0-32 or any
195 (define_constraint "M"
196 "In Thumb-1 state a constant that is a multiple of 4 in the range 0-1020."
197 (and (match_code "const_int")
198 (match_test "TARGET_32BIT ? ((ival >= 0 && ival <= 32)
199 || (((ival & (ival - 1)) & 0xFFFFFFFF) == 0))
200 : ival >= 0 && ival <= 1020 && (ival & 3) == 0")))
202 (define_constraint "N"
203 "Thumb-1 state a constant in the range 0-31."
204 (and (match_code "const_int")
205 (match_test "!TARGET_32BIT && (ival >= 0 && ival <= 31)")))
207 (define_constraint "O"
208 "In Thumb-1 state a constant that is a multiple of 4 in the range
210 (and (match_code "const_int")
211 (match_test "TARGET_THUMB1 && ival >= -508 && ival <= 508
212 && ((ival & 3) == 0)")))
214 (define_constraint "Pa"
215 "@internal In Thumb-1 state a constant in the range -510 to +510"
216 (and (match_code "const_int")
217 (match_test "TARGET_THUMB1 && ival >= -510 && ival <= 510
218 && (ival > 255 || ival < -255)")))
220 (define_constraint "Pb"
221 "@internal In Thumb-1 state a constant in the range -262 to +262"
222 (and (match_code "const_int")
223 (match_test "TARGET_THUMB1 && ival >= -262 && ival <= 262
224 && (ival > 255 || ival < -255)")))
226 (define_constraint "Pc"
227 "@internal In Thumb-1 state a constant that is in the range 1021 to 1275"
228 (and (match_code "const_int")
229 (match_test "TARGET_THUMB1
230 && ival > 1020 && ival <= 1275")))
232 (define_constraint "Pd"
233 "@internal In Thumb state a constant in the range 0 to 7"
234 (and (match_code "const_int")
235 (match_test "TARGET_THUMB && ival >= 0 && ival <= 7")))
237 (define_constraint "Pe"
238 "@internal In Thumb-1 state a constant in the range 256 to +510"
239 (and (match_code "const_int")
240 (match_test "TARGET_THUMB1 && ival >= 256 && ival <= 510")))
242 (define_constraint "Pg"
243 "@internal In Thumb-2 state a constant in range 1 to 32"
244 (and (match_code "const_int")
245 (match_test "TARGET_THUMB2 && ival >= 1 && ival <= 32")))
247 (define_constraint "Ps"
248 "@internal In Thumb-2 state a constant in the range -255 to +255"
249 (and (match_code "const_int")
250 (match_test "TARGET_THUMB2 && ival >= -255 && ival <= 255")))
252 (define_constraint "Pt"
253 "@internal In Thumb-2 state a constant in the range -7 to +7"
254 (and (match_code "const_int")
255 (match_test "TARGET_THUMB2 && ival >= -7 && ival <= 7")))
257 (define_constraint "Pu"
258 "@internal In Thumb-2 state a constant in the range +1 to +8"
259 (and (match_code "const_int")
260 (match_test "TARGET_THUMB2 && ival >= 1 && ival <= 8")))
262 (define_constraint "Pv"
263 "@internal In Thumb-2 state a constant in the range -255 to 0"
264 (and (match_code "const_int")
265 (match_test "TARGET_THUMB2 && ival >= -255 && ival <= 0")))
267 (define_constraint "Pw"
268 "@internal In Thumb-2 state a constant in the range -255 to -1"
269 (and (match_code "const_int")
270 (match_test "TARGET_THUMB2 && ival >= -255 && ival <= -1")))
272 (define_constraint "Px"
273 "@internal In Thumb-2 state a constant in the range -7 to -1"
274 (and (match_code "const_int")
275 (match_test "TARGET_THUMB2 && ival >= -7 && ival <= -1")))
277 (define_constraint "Py"
278 "@internal In Thumb-2 state a constant in the range 0 to 255"
279 (and (match_code "const_int")
280 (match_test "TARGET_THUMB2 && ival >= 0 && ival <= 255")))
282 (define_constraint "Pz"
283 "@internal In Thumb-2 state the constant 0"
284 (and (match_code "const_int")
285 (match_test "TARGET_THUMB2 && (ival == 0)")))
287 (define_constraint "G"
288 "In ARM/Thumb-2 state the floating-point constant 0."
289 (and (match_code "const_double")
290 (match_test "TARGET_32BIT && arm_const_double_rtx (op)")))
292 (define_constraint "Ha"
293 "@internal In ARM / Thumb-2 a float constant iff literal pools are allowed."
294 (and (match_code "const_double")
295 (match_test "satisfies_constraint_E (op)")
296 (match_test "!arm_disable_literal_pool")))
298 (define_constraint "Dz"
300 In ARM/Thumb-2 state a vector of constant zeros."
301 (and (match_code "const_vector")
302 (match_test "(TARGET_NEON || TARGET_HAVE_MVE) && op == CONST0_RTX (mode)")))
304 (define_constraint "DB"
306 In ARM/Thumb-2 state with MVE a constant vector of booleans."
307 (and (match_code "const_vector")
308 (match_test "TARGET_HAVE_MVE && VALID_MVE_PRED_MODE (mode)")))
310 (define_constraint "Da"
312 In ARM/Thumb-2 state a const_int, const_double or const_vector that can
313 be generated with two Data Processing insns."
314 (and (match_code "const_double,const_int,const_vector")
315 (match_test "TARGET_32BIT && arm_const_double_inline_cost (op) == 2")))
317 (define_constraint "Db"
319 In ARM/Thumb-2 state a const_int, const_double or const_vector that can
320 be generated with three Data Processing insns."
321 (and (match_code "const_double,const_int,const_vector")
322 (match_test "TARGET_32BIT && arm_const_double_inline_cost (op) == 3")))
324 (define_constraint "Dc"
326 In ARM/Thumb-2 state a const_int, const_double or const_vector that can
327 be generated with four Data Processing insns. This pattern is disabled
328 if optimizing for space or when we have load-delay slots to fill."
329 (and (match_code "const_double,const_int,const_vector")
330 (match_test "TARGET_32BIT && arm_const_double_inline_cost (op) == 4
331 && !(optimize_size || arm_ld_sched)")))
333 (define_constraint "Dd"
335 In ARM/Thumb-2 state a const_int that can be used by insn adddi."
336 (and (match_code "const_int")
337 (match_test "TARGET_32BIT && const_ok_for_dimode_op (ival, PLUS)")))
339 (define_constraint "Di"
341 In ARM/Thumb-2 state a const_int or const_double where both the high
342 and low SImode words can be generated as immediates in 32-bit instructions."
343 (and (match_code "const_double,const_int")
344 (match_test "TARGET_32BIT && arm_const_double_by_immediates (op)")))
346 (define_constraint "Dj"
348 In cores with the v6t2 ISA, a constant with exactly one consecutive
349 string of zero bits."
350 (and (match_code "const_int")
351 (match_test "arm_arch_thumb2
352 && exact_log2 (~ival + (~ival & -~ival)) >= 0")))
354 (define_constraint "Dm"
356 In ARM/Thumb-2 state a const_vector which can be loaded with a Neon vmov
357 immediate instruction."
358 (and (match_code "const_vector")
359 (match_test "TARGET_32BIT
360 && imm_for_neon_mov_operand (op, GET_MODE (op))")))
362 (define_constraint "Dn"
364 In ARM/Thumb-2 state a DImode const_int which can be loaded with a Neon vmov
365 immediate instruction."
366 (and (match_code "const_int")
367 (match_test "TARGET_32BIT && imm_for_neon_mov_operand (op, DImode)")))
369 (define_constraint "DN"
371 In ARM/Thumb-2 state a TImode const_int which can be loaded with a Neon vmov
372 immediate instruction."
373 (and (match_code "const_int")
374 (match_test "TARGET_32BIT && imm_for_neon_mov_operand (op, TImode)")))
376 (define_constraint "Dl"
378 In ARM/Thumb-2 state a const_vector which can be used with a Neon vorr or
380 (and (match_code "const_vector")
381 (match_test "TARGET_32BIT
382 && imm_for_neon_logic_operand (op, GET_MODE (op))")))
384 (define_constraint "DL"
386 In ARM/Thumb-2 state a const_vector which can be used with a Neon vorn or
388 (and (match_code "const_vector")
389 (match_test "TARGET_32BIT
390 && imm_for_neon_inv_logic_operand (op, GET_MODE (op))")))
392 (define_constraint "Do"
394 In ARM/Thumb2 state valid offset for an ldrd/strd instruction."
395 (and (match_code "const_int")
396 (match_test "TARGET_LDRD && offset_ok_for_ldrd_strd (ival)")))
398 (define_constraint "Dv"
400 In ARM/Thumb-2 state a const_double which can be used with a VFP fconsts
402 (and (match_code "const_double")
403 (match_test "TARGET_32BIT && vfp3_const_double_rtx (op)")))
405 (define_constraint "Dy"
407 In ARM/Thumb-2 state a const_double which can be used with a VFP fconstd
409 (and (match_code "const_double")
410 (match_test "TARGET_32BIT && TARGET_VFP_DOUBLE && vfp3_const_double_rtx (op)")))
412 (define_constraint "Dt"
414 In ARM/ Thumb2 a const_double which can be used with a vcvt.f32.s32 with fract bits operation"
415 (and (match_code "const_double")
416 (match_test "TARGET_32BIT && vfp3_const_double_for_fract_bits (op)")))
418 (define_constraint "Ds"
420 In ARM/Thumb-2 state a const_vector which can be used as immediate
421 in vshl instruction."
422 (and (match_code "const_vector")
423 (match_test "TARGET_32BIT
424 && imm_for_neon_lshift_operand (op, GET_MODE (op))")))
426 (define_constraint "Dp"
428 In ARM/ Thumb2 a const_double which can be used with a vcvt.s32.f32 with bits operation"
429 (and (match_code "const_double")
430 (match_test "TARGET_32BIT
431 && vfp3_const_double_for_bits (op) > 0")))
433 (define_constraint "Tu"
434 "@internal In ARM / Thumb-2 an integer constant iff literal pools are
436 (and (match_test "CONSTANT_P (op)")
437 (match_test "!arm_disable_literal_pool")))
439 (define_register_constraint "Ts" "(arm_restrict_it) ? LO_REGS : GENERAL_REGS"
440 "For arm_restrict_it the core registers @code{r0}-@code{r7}. GENERAL_REGS otherwise.")
442 (define_memory_constraint "Ua"
444 An address valid for loading/storing register exclusive"
445 (match_operand 0 "mem_noofs_operand"))
447 (define_memory_constraint "Uh"
449 An address suitable for byte and half-word loads which does not point inside a constant pool"
450 (and (match_code "mem")
451 (match_test "arm_legitimate_address_p (GET_MODE (op), XEXP (op, 0), false) && !arm_is_constant_pool_ref (op)")))
453 (define_memory_constraint "Ut"
455 In ARM/Thumb-2 state an address valid for loading/storing opaque structure
456 types wider than TImode."
457 (and (match_code "mem")
458 (match_test "TARGET_32BIT && neon_struct_mem_operand (op)")))
460 (define_memory_constraint "Uv"
462 In ARM/Thumb-2 state a valid VFP load/store address."
463 (and (match_code "mem")
464 (match_test "TARGET_32BIT && arm_coproc_mem_operand (op, FALSE)")))
466 (define_memory_constraint "Ug"
468 In Thumb-2 state a valid MVE struct load/store address."
469 (match_operand 0 "mve_struct_operand"))
471 (define_memory_constraint "Uj"
473 In ARM/Thumb-2 state a VFP load/store address that supports writeback
474 for Neon but not for MVE"
475 (and (match_code "mem")
476 (match_test "TARGET_32BIT")
477 (match_test "TARGET_HAVE_MVE
478 ? arm_coproc_mem_operand_no_writeback (op)
479 : neon_vector_mem_operand (op, 2, true)")))
481 (define_memory_constraint "Uy"
483 In ARM/Thumb-2 state a valid iWMMX load/store address."
484 (and (match_code "mem")
485 (match_test "TARGET_32BIT && arm_coproc_mem_operand (op, TRUE)")))
487 (define_memory_constraint "Un"
489 In ARM/Thumb-2 state a valid address for Neon doubleword vector
490 load/store instructions."
491 (and (match_code "mem")
492 (match_test "TARGET_32BIT && neon_vector_mem_operand (op, 0, true)")))
494 (define_memory_constraint "Um"
496 In ARM/Thumb-2 state a valid address for Neon element and structure
497 load/store instructions."
498 (and (match_code "mem")
499 (match_test "TARGET_32BIT && neon_vector_mem_operand (op, 2, true)")))
501 (define_memory_constraint "Us"
503 In ARM/Thumb-2 state a valid address for non-offset loads/stores of
504 quad-word values in four ARM registers."
505 (and (match_code "mem")
506 (match_test "TARGET_32BIT && neon_vector_mem_operand (op, 1, true)")))
508 (define_memory_constraint "Ux"
510 In ARM/Thumb-2 state a valid address and load into CORE regs or only to
511 LO_REGS based on mode of op."
512 (and (match_code "mem")
513 (match_test "(TARGET_HAVE_MVE || TARGET_HAVE_MVE_FLOAT)
514 && mve_vector_mem_operand (GET_MODE (op),
515 XEXP (op, 0), true)")))
517 (define_constraint "Ui"
519 Match a constant (as per the 'i' constraint) provided that we have the
520 literal pool available. This is useful for load insns that would need
521 to move such constants to the literal pool after RA."
522 (match_test "!arm_disable_literal_pool && satisfies_constraint_i (op)"))
524 (define_memory_constraint "Uq"
526 In ARM state an address valid in ldrsb instructions."
527 (and (match_code "mem")
528 (match_test "TARGET_ARM
529 && arm_legitimate_address_outer_p (GET_MODE (op), XEXP (op, 0),
531 && !arm_is_constant_pool_ref (op)")))
533 (define_memory_constraint "Q"
535 An address that is a single base register."
536 (and (match_code "mem")
537 (match_test "REG_P (XEXP (op, 0))")))
539 (define_memory_constraint "Uu"
541 In Thumb state an address that is valid in 16bit encoding."
542 (and (match_code "mem")
543 (match_test "TARGET_THUMB
544 && thumb1_legitimate_address_p (GET_MODE (op), XEXP (op, 0),
547 ; The 16-bit post-increment LDR/STR accepted by thumb1_legitimate_address_p
548 ; are actually LDM/STM instructions, so cannot be used to access unaligned
550 (define_memory_constraint "Uw"
552 In Thumb state an address that is valid in 16bit encoding, and that can be
553 used for unaligned accesses."
554 (and (match_code "mem")
555 (match_test "TARGET_THUMB
556 && thumb1_legitimate_address_p (GET_MODE (op), XEXP (op, 0),
558 && GET_CODE (XEXP (op, 0)) != POST_INC")))
560 (define_constraint "US"
562 US is a symbol reference."
563 (match_code "symbol_ref")
566 ;; True if the immediate is the range +/- 1016 and multiple of 8 for MVE.
567 (define_constraint "Ri"
568 "@internal In Thumb-2 state a constant is multiple of 8 and in range
570 (and (match_code "const_int")
571 (match_test "TARGET_HAVE_MVE && (-1016 <= ival) && (ival <= 1016)
572 && ((ival % 8) == 0)")))
574 ;; True if the immediate is multiple of 2 and in range of -/+ 252 for MVE.
575 (define_constraint "Rl"
576 "@internal In Thumb-2 state a constant is multiple of 2 and in range
578 (and (match_code "const_int")
579 (match_test "TARGET_HAVE_MVE && (-252 <= ival) && (ival <= 252)
580 && ((ival % 2) == 0)")))
582 (define_memory_constraint "Uz"
584 A memory access that is accessible as an LDC/STC operand"
585 (and (match_code "mem")
586 (match_test "arm_coproc_ldc_stc_legitimate_address (op)")))
588 (define_memory_constraint "Uo"
590 A memory operand for Arm/Thumb-2 LDRD/STRD"
591 (and (match_code "mem")
592 (match_test "arm_ldrd_legitimate_address (op)")))
594 ;; We used to have constraint letters for S and R in ARM state, but
595 ;; all uses of these now appear to have been removed.
597 ;; Additionally, we used to have a Q constraint in Thumb state, but
598 ;; this wasn't really a valid memory constraint. Again, all uses of
599 ;; this now seem to have been removed.