1 ;; Constraints definitions belonging to the gcc backend for IBM S/390.
2 ;; Copyright (C) 2006-2018 Free Software Foundation, Inc.
3 ;; Written by Wolfgang Gellerich, using code and information found in
4 ;; files s390.md, s390.h, and s390.c.
6 ;; This file is part of GCC.
8 ;; GCC is free software; you can redistribute it and/or modify it under
9 ;; the terms of the GNU General Public License as published by the Free
10 ;; Software Foundation; either version 3, or (at your option) any later
13 ;; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 ;; WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GCC; see the file COPYING3. If not see
20 ;; <http://www.gnu.org/licenses/>.
24 ;; Special constraints for s/390 machine description:
26 ;; a -- Any address register from 1 to 15.
27 ;; b -- Memory operand whose address is a symbol reference or a symbol
28 ;; reference + constant which can be proven to be naturally aligned.
29 ;; c -- Condition code register 33.
30 ;; d -- Any register from 0 to 15.
31 ;; f -- Floating point registers.
32 ;; j -- Multiple letter constraint for constant scalar and vector values
33 ;; j00: constant zero scalar or vector
34 ;; jm1: constant scalar or vector with all bits set
35 ;; jxx: contiguous bitmask of 0 or 1 in all vector elements
36 ;; jyy: constant consisting of byte chunks being either 0 or 0xff
37 ;; jKK: constant vector with all elements having the same value and
38 ;; matching K constraint
39 ;; jm6: An integer operand with the lowest order 6 bits all ones.
40 ;; t -- Access registers 36 and 37.
41 ;; v -- Vector registers v0-v31.
42 ;; C -- A signed 8-bit constant (-128..127)
43 ;; D -- An unsigned 16-bit constant (0..65535)
44 ;; G -- Const double zero operand
45 ;; I -- An 8-bit constant (0..255).
46 ;; J -- A 12-bit constant (0..4095).
47 ;; K -- A 16-bit constant (-32768..32767).
48 ;; L -- Value appropriate as displacement.
49 ;; (0..4095) for short displacement
50 ;; (-524288..524287) for long displacement
51 ;; M -- Constant integer with a value of 0x7fffffff.
52 ;; N -- Multiple letter constraint followed by 4 parameter letters.
53 ;; 0..9,x: number of the part counting from most to least significant
54 ;; H,Q: mode of the part
55 ;; D,S,H: mode of the containing operand
56 ;; 0,F: value of the other parts (F - all bits set)
58 ;; xxDq satisfies s390_contiguous_bitmask_p for DImode
59 ;; (with possible wraparound of the one-bit range)
60 ;; xxSw satisfies s390_contiguous_bitmask_p for SImode
61 ;; (with possible wraparound of the one-bit range)
62 ;; xxSq satisfies s390_contiguous_bitmask_nowrap_p for SImode
63 ;; (without wraparound of the one-bit range)
65 ;; The constraint matches if the specified part of a constant
66 ;; has a value different from its other parts. If the letter x
67 ;; is specified instead of a part number, the constraint matches
68 ;; if there is any single part with non-default value.
69 ;; O -- Multiple letter constraint followed by 1 parameter.
70 ;; s: Signed extended immediate value (-2G .. 2G-1).
71 ;; p: Positive extended immediate value (0 .. 4G-1).
72 ;; n: Negative extended immediate value (-4G+1 .. -1).
73 ;; These constraints do not accept any operand if the machine does
74 ;; not provide the extended-immediate facility.
75 ;; P -- Any integer constant that can be loaded without literal pool.
76 ;; Q -- Memory reference without index register and with short displacement.
77 ;; R -- Memory reference with index register and short displacement.
78 ;; S -- Memory reference without index register but with long displacement.
79 ;; T -- Memory reference with index register and long displacement.
80 ;; A -- Multiple letter constraint followed by Q, R, S, or T:
81 ;; Offsettable memory reference of type specified by second letter.
82 ;; B -- Multiple letter constraint followed by Q, R, S, or T:
83 ;; Memory reference of the type specified by second letter that
84 ;; does *not* refer to a literal pool entry.
85 ;; U -- Pointer with short displacement. (deprecated - use ZR)
86 ;; W -- Pointer with long displacement. (deprecated - use ZT)
87 ;; Y -- Address style operand without index.
88 ;; ZQ -- Pointer without index register and with short displacement.
89 ;; ZR -- Pointer with index register and short displacement.
90 ;; ZS -- Pointer without index register but with long displacement.
91 ;; ZT -- Pointer with index register and long displacement.
97 ;; Register constraints.
100 (define_register_constraint "a"
102 "Any address register from 1 to 15.")
105 (define_register_constraint "c"
107 "Condition code register 33")
110 (define_register_constraint "d"
112 "Any register from 0 to 15")
115 (define_register_constraint "f"
117 "Floating point registers")
120 (define_register_constraint "t"
123 Access registers 36 and 37")
126 (define_register_constraint "v"
128 "Vector registers v0-v31")
132 ;; General constraints for constants.
135 (define_constraint "C"
137 An 8-bit signed immediate constant (-128..127)"
138 (and (match_code "const_int")
139 (match_test "ival >= -128 && ival <= 127")))
142 (define_constraint "D"
143 "An unsigned 16-bit constant (0..65535)"
144 (and (match_code "const_int")
145 (match_test "ival >= 0 && ival <= 65535")))
148 (define_constraint "G"
150 Const double zero operand"
151 (and (match_code "const_double")
152 (match_test "s390_float_const_zero_p (op)")))
155 (define_constraint "I"
156 "An 8-bit constant (0..255)"
157 (and (match_code "const_int")
158 (match_test "(unsigned HOST_WIDE_INT) ival <= 255")))
161 (define_constraint "J"
162 "A 12-bit constant (0..4095)"
163 (and (match_code "const_int")
164 (match_test "(unsigned HOST_WIDE_INT) ival <= 4095")))
167 (define_constraint "K"
168 "A 16-bit constant (-32768..32767)"
169 (and (match_code "const_int")
170 (match_test "ival >= -32768 && ival <= 32767")))
173 (define_constraint "L"
174 "Value appropriate as displacement.
175 (0..4095) for short displacement
176 (-524288..524287) for long displacement"
177 (and (match_code "const_int")
178 (match_test "TARGET_LONG_DISPLACEMENT ?
179 (ival >= -524288 && ival <= 524287)
180 : (ival >= 0 && ival <= 4095)")))
183 (define_constraint "M"
184 "Constant integer with a value of 0x7fffffff"
185 (and (match_code "const_int")
186 (match_test "ival == 2147483647")))
189 (define_constraint "P"
191 Any integer constant that can be loaded without literal pool"
192 (and (match_code "const_int")
193 (match_test "legitimate_reload_constant_p (GEN_INT (ival))")))
196 (define_address_constraint "Y"
197 "Address style operand without index register"
199 ;; Simply check for base + offset style operands. Reload will take
200 ;; care of making sure we have a proper base register.
202 (match_test "s390_decompose_addrstyle_without_index (op, NULL, NULL)" ))
205 ;; N -- Multiple letter constraint followed by 4 parameter letters.
206 ;; 0..9,x: number of the part counting from most to least significant
207 ;; H,Q: mode of the part
208 ;; D,S,H: mode of the containing operand
209 ;; 0,F: value of the other parts (F = all bits set)
211 ;; The constraint matches if the specified part of a constant
212 ;; has a value different from its other parts. If the letter x
213 ;; is specified instead of a part number, the constraint matches
214 ;; if there is any single part with non-default value.
216 ;; The following patterns define only those constraints that are actually
217 ;; used in s390.md. If you need an additional one, simply add it in the
218 ;; obvious way. Function s390_N_constraint_str is ready to handle all
223 (define_constraint "NxQS0"
225 (and (match_code "const_int")
226 (match_test "s390_N_constraint_str (\"xQS0\", ival)")))
229 (define_constraint "NxQD0"
231 (and (match_code "const_int")
232 (match_test "s390_N_constraint_str (\"xQD0\", ival)")))
235 (define_constraint "N3HD0"
237 (and (match_code "const_int")
238 (match_test "s390_N_constraint_str (\"3HD0\", ival)")))
241 (define_constraint "N2HD0"
243 (and (match_code "const_int")
244 (match_test "s390_N_constraint_str (\"2HD0\", ival)")))
247 (define_constraint "N1SD0"
249 (and (match_code "const_int")
250 (match_test "s390_N_constraint_str (\"1SD0\", ival)")))
253 (define_constraint "N1HS0"
255 (and (match_code "const_int")
256 (match_test "s390_N_constraint_str (\"1HS0\", ival)")))
259 (define_constraint "N1HD0"
261 (and (match_code "const_int")
262 (match_test "s390_N_constraint_str (\"1HD0\", ival)")))
265 (define_constraint "N0SD0"
267 (and (match_code "const_int")
268 (match_test "s390_N_constraint_str (\"0SD0\", ival)")))
271 (define_constraint "N0HS0"
273 (and (match_code "const_int")
274 (match_test "s390_N_constraint_str (\"0HS0\", ival)")))
277 (define_constraint "N0HD0"
279 (and (match_code "const_int")
280 (match_test "s390_N_constraint_str (\"0HD0\", ival)")))
283 (define_constraint "NxQDF"
285 (and (match_code "const_int")
286 (match_test "s390_N_constraint_str (\"xQDF\", ival)")))
289 (define_constraint "N1SDF"
291 (and (match_code "const_int")
292 (match_test "s390_N_constraint_str (\"1SDF\", ival)")))
295 (define_constraint "N0SDF"
297 (and (match_code "const_int")
298 (match_test "s390_N_constraint_str (\"0SDF\", ival)")))
301 (define_constraint "N3HDF"
303 (and (match_code "const_int")
304 (match_test "s390_N_constraint_str (\"3HDF\", ival)")))
307 (define_constraint "N2HDF"
309 (and (match_code "const_int")
310 (match_test "s390_N_constraint_str (\"2HDF\", ival)")))
313 (define_constraint "N1HDF"
315 (and (match_code "const_int")
316 (match_test "s390_N_constraint_str (\"1HDF\", ival)")))
319 (define_constraint "N0HDF"
321 (and (match_code "const_int")
322 (match_test "s390_N_constraint_str (\"0HDF\", ival)")))
325 (define_constraint "N0HSF"
327 (and (match_code "const_int")
328 (match_test "s390_N_constraint_str (\"0HSF\", ival)")))
331 (define_constraint "N1HSF"
333 (and (match_code "const_int")
334 (match_test "s390_N_constraint_str (\"1HSF\", ival)")))
337 (define_constraint "NxQSF"
339 (and (match_code "const_int")
340 (match_test "s390_N_constraint_str (\"xQSF\", ival)")))
343 (define_constraint "NxQHF"
345 (and (match_code "const_int")
346 (match_test "s390_N_constraint_str (\"xQHF\", ival)")))
349 (define_constraint "NxQH0"
351 (and (match_code "const_int")
352 (match_test "s390_N_constraint_str (\"xQH0\", ival)")))
354 (define_constraint "NxxDw"
356 (and (match_code "const_int")
357 (match_test "s390_contiguous_bitmask_p (ival, true, 64, NULL, NULL)")))
359 (define_constraint "NxxSq"
361 (and (match_code "const_int")
362 (match_test "s390_contiguous_bitmask_p (ival, false, 32, NULL, NULL)")))
364 (define_constraint "NxxSw"
366 (and (match_code "const_int")
367 (match_test "s390_contiguous_bitmask_p (ival, true, 32, NULL, NULL)")))
370 ;; Double-letter constraints starting with O follow.
374 (define_constraint "Os"
376 Signed extended immediate value (-2G .. 2G-1).
377 This constraint will only match if the machine provides
378 the extended-immediate facility."
379 (and (match_code "const_int")
380 (match_test "s390_O_constraint_str ('s', ival)")))
383 (define_constraint "Op"
385 Positive extended immediate value (0 .. 4G-1).
386 This constraint will only match if the machine provides
387 the extended-immediate facility."
388 (and (match_code "const_int")
389 (match_test "s390_O_constraint_str ('p', ival)")))
392 (define_constraint "On"
394 Negative extended immediate value (-4G+1 .. -1).
395 This constraint will only match if the machine provides
396 the extended-immediate facility."
397 (and (match_code "const_int")
398 (match_test "s390_O_constraint_str ('n', ival)")))
402 ;; Vector constraints follow.
405 (define_constraint "j00"
406 "Zero scalar or vector constant"
407 (match_test "op == CONST0_RTX (GET_MODE (op))"))
409 (define_constraint "jm1"
410 "All one bit scalar or vector constant"
411 (match_test "op == CONSTM1_RTX (GET_MODE (op))"))
413 ; vector generate mask operand - support for up to 64 bit elements
414 (define_constraint "jxx"
416 (and (match_code "const_vector")
417 (match_test "s390_contiguous_bitmask_vector_p (op, NULL, NULL)")))
419 ; vector generate byte mask operand - this is only supposed to deal
420 ; with real vectors 128 bit values of being either 0 or -1 are handled
422 (define_constraint "jyy"
424 (and (match_code "const_vector")
425 (match_test "s390_bytemask_vector_p (op, NULL)")))
427 ; vector replicate immediate operand - support for up to 64 bit elements
428 (define_constraint "jKK"
430 (and (and (and (match_code "const_vector")
431 (match_test "const_vec_duplicate_p (op)"))
432 (match_test "GET_MODE_UNIT_SIZE (GET_MODE (op)) <= 8"))
433 (match_test "satisfies_constraint_K (XVECEXP (op, 0, 0))")))
435 (define_constraint "jm6"
436 "@internal An integer operand with the lowest order 6 bits all ones."
437 (match_operand 0 "const_int_6bitset_operand"))
440 ;; Memory constraints follow.
443 (define_memory_constraint "Q"
444 "Memory reference without index register and with short displacement"
445 (match_test "s390_mem_constraint (\"Q\", op)"))
448 (define_memory_constraint "R"
449 "Memory reference with index register and short displacement"
450 (match_test "s390_mem_constraint (\"R\", op)"))
453 (define_memory_constraint "S"
454 "Memory reference without index register but with long displacement"
455 (match_test "s390_mem_constraint (\"S\", op)"))
458 (define_memory_constraint "T"
459 "Memory reference with index register and long displacement"
460 (match_test "s390_mem_constraint (\"T\", op)"))
463 (define_memory_constraint "b"
464 "Memory reference whose address is a naturally aligned symbol reference."
465 (match_test "MEM_P (op)
466 && s390_check_symref_alignment (XEXP (op, 0),
467 GET_MODE_SIZE (GET_MODE (op)))"))
469 ; This defines 'm' as normal memory constraint. This is only possible
470 ; since the standard memory constraint is re-defined in s390.h using
471 ; the TARGET_MEM_CONSTRAINT macro.
472 (define_memory_constraint "m"
473 "Matches the most general memory address for pre-z10 machines."
474 (match_test "s390_mem_constraint (\"T\", op)"))
476 (define_memory_constraint "AQ"
478 Offsettable memory reference without index register and with short displacement"
479 (match_test "s390_mem_constraint (\"AQ\", op)"))
482 (define_memory_constraint "AR"
484 Offsettable memory reference with index register and short displacement"
485 (match_test "s390_mem_constraint (\"AR\", op)"))
488 (define_memory_constraint "AS"
490 Offsettable memory reference without index register but with long displacement"
491 (match_test "s390_mem_constraint (\"AS\", op)"))
494 (define_memory_constraint "AT"
496 Offsettable memory reference with index register and long displacement"
497 (match_test "s390_mem_constraint (\"AT\", op)"))
501 (define_constraint "BQ"
503 Memory reference without index register and with short
504 displacement that does *not* refer to a literal pool entry."
505 (match_test "s390_mem_constraint (\"BQ\", op)"))
508 (define_constraint "BR"
510 Memory reference with index register and short displacement that
511 does *not* refer to a literal pool entry. "
512 (match_test "s390_mem_constraint (\"BR\", op)"))
515 (define_constraint "BS"
517 Memory reference without index register but with long displacement
518 that does *not* refer to a literal pool entry. "
519 (match_test "s390_mem_constraint (\"BS\", op)"))
522 (define_constraint "BT"
524 Memory reference with index register and long displacement that
525 does *not* refer to a literal pool entry. "
526 (match_test "s390_mem_constraint (\"BT\", op)"))
529 (define_address_constraint "U"
530 "Pointer with short displacement. (deprecated - use ZR)"
531 (match_test "s390_mem_constraint (\"ZR\", op)"))
533 (define_address_constraint "W"
534 "Pointer with long displacement. (deprecated - use ZT)"
535 (match_test "s390_mem_constraint (\"ZT\", op)"))
538 (define_address_constraint "ZQ"
539 "Pointer without index register and with short displacement."
540 (match_test "s390_mem_constraint (\"ZQ\", op)"))
542 (define_address_constraint "ZR"
543 "Pointer with index register and short displacement."
544 (match_test "s390_mem_constraint (\"ZR\", op)"))
546 (define_address_constraint "ZS"
547 "Pointer without index register but with long displacement."
548 (match_test "s390_mem_constraint (\"ZS\", op)"))
550 (define_address_constraint "ZT"
551 "Pointer with index register and long displacement."
552 (match_test "s390_mem_constraint (\"ZT\", op)"))