1 ;; Constraints definitions belonging to the gcc backend for IBM S/390.
2 ;; Copyright (C) 2006-2015 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 ;; t -- Access registers 36 and 37.
38 ;; v -- Vector registers v0-v31.
39 ;; C -- A signed 8-bit constant (-128..127)
40 ;; D -- An unsigned 16-bit constant (0..65535)
41 ;; G -- Const double zero operand
42 ;; I -- An 8-bit constant (0..255).
43 ;; J -- A 12-bit constant (0..4095).
44 ;; K -- A 16-bit constant (-32768..32767).
45 ;; L -- Value appropriate as displacement.
46 ;; (0..4095) for short displacement
47 ;; (-524288..524287) for long displacement
48 ;; M -- Constant integer with a value of 0x7fffffff.
49 ;; N -- Multiple letter constraint followed by 4 parameter letters.
50 ;; 0..9,x: number of the part counting from most to least significant
51 ;; H,Q: mode of the part
52 ;; D,S,H: mode of the containing operand
53 ;; 0,F: value of the other parts (F - all bits set)
55 ;; xx[DS]q satisfies s390_contiguous_bitmask_p for DImode or SImode
57 ;; The constraint matches if the specified part of a constant
58 ;; has a value different from its other parts. If the letter x
59 ;; is specified instead of a part number, the constraint matches
60 ;; if there is any single part with non-default value.
61 ;; O -- Multiple letter constraint followed by 1 parameter.
62 ;; s: Signed extended immediate value (-2G .. 2G-1).
63 ;; p: Positive extended immediate value (0 .. 4G-1).
64 ;; n: Negative extended immediate value (-4G+1 .. -1).
65 ;; These constraints do not accept any operand if the machine does
66 ;; not provide the extended-immediate facility.
67 ;; P -- Any integer constant that can be loaded without literal pool.
68 ;; Q -- Memory reference without index register and with short displacement.
69 ;; R -- Memory reference with index register and short displacement.
70 ;; S -- Memory reference without index register but with long displacement.
71 ;; T -- Memory reference with index register and long displacement.
72 ;; A -- Multiple letter constraint followed by Q, R, S, or T:
73 ;; Offsettable memory reference of type specified by second letter.
74 ;; B -- Multiple letter constraint followed by Q, R, S, or T:
75 ;; Memory reference of the type specified by second letter that
76 ;; does *not* refer to a literal pool entry.
77 ;; U -- Pointer with short displacement. (deprecated - use ZQZR)
78 ;; W -- Pointer with long displacement. (deprecated - use ZSZT)
79 ;; Y -- Shift count operand.
80 ;; ZQ -- Pointer without index register and with short displacement.
81 ;; ZR -- Pointer with index register and short displacement.
82 ;; ZS -- Pointer without index register but with long displacement.
83 ;; ZT -- Pointer with index register and long displacement.
89 ;; Register constraints.
92 (define_register_constraint "a"
94 "Any address register from 1 to 15.")
97 (define_register_constraint "c"
99 "Condition code register 33")
102 (define_register_constraint "d"
104 "Any register from 0 to 15")
107 (define_register_constraint "f"
109 "Floating point registers")
111 (define_constraint "j00"
112 "Zero scalar or vector constant"
113 (match_test "op == CONST0_RTX (GET_MODE (op))"))
115 (define_constraint "jm1"
116 "All one bit scalar or vector constant"
117 (match_test "op == CONSTM1_RTX (GET_MODE (op))"))
119 (define_constraint "jxx"
121 (and (match_code "const_vector")
122 (match_test "s390_contiguous_bitmask_vector_p (op, NULL, NULL)")))
124 (define_constraint "jyy"
126 (and (match_code "const_vector")
127 (match_test "s390_bytemask_vector_p (op, NULL)")))
129 (define_register_constraint "t"
132 Access registers 36 and 37")
135 (define_register_constraint "v"
137 "Vector registers v0-v31")
141 ;; General constraints for constants.
144 (define_constraint "C"
146 An 8-bit signed immediate constant (-128..127)"
147 (and (match_code "const_int")
148 (match_test "ival >= -128 && ival <= 127")))
151 (define_constraint "D"
152 "An unsigned 16-bit constant (0..65535)"
153 (and (match_code "const_int")
154 (match_test "ival >= 0 && ival <= 65535")))
157 (define_constraint "G"
159 Const double zero operand"
160 (and (match_code "const_double")
161 (match_test "s390_float_const_zero_p (op)")))
164 (define_constraint "I"
165 "An 8-bit constant (0..255)"
166 (and (match_code "const_int")
167 (match_test "(unsigned HOST_WIDE_INT) ival <= 255")))
170 (define_constraint "J"
171 "A 12-bit constant (0..4095)"
172 (and (match_code "const_int")
173 (match_test "(unsigned HOST_WIDE_INT) ival <= 4095")))
176 (define_constraint "K"
177 "A 16-bit constant (-32768..32767)"
178 (and (match_code "const_int")
179 (match_test "ival >= -32768 && ival <= 32767")))
182 (define_constraint "L"
183 "Value appropriate as displacement.
184 (0..4095) for short displacement
185 (-524288..524287) for long displacement"
186 (and (match_code "const_int")
187 (match_test "TARGET_LONG_DISPLACEMENT ?
188 (ival >= -524288 && ival <= 524287)
189 : (ival >= 0 && ival <= 4095)")))
192 (define_constraint "M"
193 "Constant integer with a value of 0x7fffffff"
194 (and (match_code "const_int")
195 (match_test "ival == 2147483647")))
198 (define_constraint "P"
200 Any integer constant that can be loaded without literal pool"
201 (and (match_code "const_int")
202 (match_test "legitimate_reload_constant_p (GEN_INT (ival))")))
205 (define_address_constraint "Y"
206 "Shift count operand"
208 ;; Simply check for the basic form of a shift count. Reload will
209 ;; take care of making sure we have a proper base register.
211 (match_test "s390_decompose_shift_count (op, NULL, NULL)" ))
214 ;; N -- Multiple letter constraint followed by 4 parameter letters.
215 ;; 0..9,x: number of the part counting from most to least significant
216 ;; H,Q: mode of the part
217 ;; D,S,H: mode of the containing operand
218 ;; 0,F: value of the other parts (F = all bits set)
220 ;; The constraint matches if the specified part of a constant
221 ;; has a value different from its other parts. If the letter x
222 ;; is specified instead of a part number, the constraint matches
223 ;; if there is any single part with non-default value.
225 ;; The following patterns define only those constraints that are actually
226 ;; used in s390.md. If you need an additional one, simply add it in the
227 ;; obvious way. Function s390_N_constraint_str is ready to handle all
232 (define_constraint "NxQS0"
234 (and (match_code "const_int")
235 (match_test "s390_N_constraint_str (\"xQS0\", ival)")))
238 (define_constraint "NxQD0"
240 (and (match_code "const_int")
241 (match_test "s390_N_constraint_str (\"xQD0\", ival)")))
244 (define_constraint "N3HD0"
246 (and (match_code "const_int")
247 (match_test "s390_N_constraint_str (\"3HD0\", ival)")))
250 (define_constraint "N2HD0"
252 (and (match_code "const_int")
253 (match_test "s390_N_constraint_str (\"2HD0\", ival)")))
256 (define_constraint "N1SD0"
258 (and (match_code "const_int")
259 (match_test "s390_N_constraint_str (\"1SD0\", ival)")))
262 (define_constraint "N1HS0"
264 (and (match_code "const_int")
265 (match_test "s390_N_constraint_str (\"1HS0\", ival)")))
268 (define_constraint "N1HD0"
270 (and (match_code "const_int")
271 (match_test "s390_N_constraint_str (\"1HD0\", ival)")))
274 (define_constraint "N0SD0"
276 (and (match_code "const_int")
277 (match_test "s390_N_constraint_str (\"0SD0\", ival)")))
280 (define_constraint "N0HS0"
282 (and (match_code "const_int")
283 (match_test "s390_N_constraint_str (\"0HS0\", ival)")))
286 (define_constraint "N0HD0"
288 (and (match_code "const_int")
289 (match_test "s390_N_constraint_str (\"0HD0\", ival)")))
292 (define_constraint "NxQDF"
294 (and (match_code "const_int")
295 (match_test "s390_N_constraint_str (\"xQDF\", ival)")))
298 (define_constraint "N1SDF"
300 (and (match_code "const_int")
301 (match_test "s390_N_constraint_str (\"1SDF\", ival)")))
304 (define_constraint "N0SDF"
306 (and (match_code "const_int")
307 (match_test "s390_N_constraint_str (\"0SDF\", ival)")))
310 (define_constraint "N3HDF"
312 (and (match_code "const_int")
313 (match_test "s390_N_constraint_str (\"3HDF\", ival)")))
316 (define_constraint "N2HDF"
318 (and (match_code "const_int")
319 (match_test "s390_N_constraint_str (\"2HDF\", ival)")))
322 (define_constraint "N1HDF"
324 (and (match_code "const_int")
325 (match_test "s390_N_constraint_str (\"1HDF\", ival)")))
328 (define_constraint "N0HDF"
330 (and (match_code "const_int")
331 (match_test "s390_N_constraint_str (\"0HDF\", ival)")))
334 (define_constraint "N0HSF"
336 (and (match_code "const_int")
337 (match_test "s390_N_constraint_str (\"0HSF\", ival)")))
340 (define_constraint "N1HSF"
342 (and (match_code "const_int")
343 (match_test "s390_N_constraint_str (\"1HSF\", ival)")))
346 (define_constraint "NxQSF"
348 (and (match_code "const_int")
349 (match_test "s390_N_constraint_str (\"xQSF\", ival)")))
352 (define_constraint "NxQHF"
354 (and (match_code "const_int")
355 (match_test "s390_N_constraint_str (\"xQHF\", ival)")))
358 (define_constraint "NxQH0"
360 (and (match_code "const_int")
361 (match_test "s390_N_constraint_str (\"xQH0\", ival)")))
363 (define_constraint "NxxDq"
365 (and (match_code "const_int")
366 (match_test "s390_contiguous_bitmask_p (ival, 64, NULL, NULL)")))
368 (define_constraint "NxxSq"
370 (and (match_code "const_int")
371 (match_test "s390_contiguous_bitmask_p (ival, 32, NULL, NULL)")))
374 ;; Double-letter constraints starting with O follow.
378 (define_constraint "Os"
380 Signed extended immediate value (-2G .. 2G-1).
381 This constraint will only match if the machine provides
382 the extended-immediate facility."
383 (and (match_code "const_int")
384 (match_test "s390_O_constraint_str ('s', ival)")))
387 (define_constraint "Op"
389 Positive extended immediate value (0 .. 4G-1).
390 This constraint will only match if the machine provides
391 the extended-immediate facility."
392 (and (match_code "const_int")
393 (match_test "s390_O_constraint_str ('p', ival)")))
396 (define_constraint "On"
398 Negative extended immediate value (-4G+1 .. -1).
399 This constraint will only match if the machine provides
400 the extended-immediate facility."
401 (and (match_code "const_int")
402 (match_test "s390_O_constraint_str ('n', ival)")))
408 ;; Memory constraints follow.
411 (define_memory_constraint "Q"
412 "Memory reference without index register and with short displacement"
413 (match_test "s390_mem_constraint (\"Q\", op)"))
416 (define_memory_constraint "R"
417 "Memory reference with index register and short displacement"
418 (match_test "s390_mem_constraint (\"R\", op)"))
421 (define_memory_constraint "S"
422 "Memory reference without index register but with long displacement"
423 (match_test "s390_mem_constraint (\"S\", op)"))
426 (define_memory_constraint "T"
427 "Memory reference with index register and long displacement"
428 (match_test "s390_mem_constraint (\"T\", op)"))
431 (define_memory_constraint "b"
432 "Memory reference whose address is a naturally aligned symbol reference."
433 (match_test "MEM_P (op)
434 && s390_check_symref_alignment (XEXP (op, 0),
435 GET_MODE_SIZE (GET_MODE (op)))"))
437 ; This defines 'm' as normal memory constraint. This is only possible
438 ; since the standard memory constraint is re-defined in s390.h using
439 ; the TARGET_MEM_CONSTRAINT macro.
440 (define_memory_constraint "m"
441 "Matches the most general memory address for pre-z10 machines."
442 (match_test "s390_mem_constraint (\"R\", op)
443 || s390_mem_constraint (\"T\", op)"))
445 (define_memory_constraint "AQ"
447 Offsettable memory reference without index register and with short displacement"
448 (match_test "s390_mem_constraint (\"AQ\", op)"))
451 (define_memory_constraint "AR"
453 Offsettable memory reference with index register and short displacement"
454 (match_test "s390_mem_constraint (\"AR\", op)"))
457 (define_memory_constraint "AS"
459 Offsettable memory reference without index register but with long displacement"
460 (match_test "s390_mem_constraint (\"AS\", op)"))
463 (define_memory_constraint "AT"
465 Offsettable memory reference with index register and long displacement"
466 (match_test "s390_mem_constraint (\"AT\", op)"))
470 (define_constraint "BQ"
472 Memory reference without index register and with short
473 displacement that does *not* refer to a literal pool entry."
474 (match_test "s390_mem_constraint (\"BQ\", op)"))
477 (define_constraint "BR"
479 Memory reference with index register and short displacement that
480 does *not* refer to a literal pool entry. "
481 (match_test "s390_mem_constraint (\"BR\", op)"))
484 (define_constraint "BS"
486 Memory reference without index register but with long displacement
487 that does *not* refer to a literal pool entry. "
488 (match_test "s390_mem_constraint (\"BS\", op)"))
491 (define_constraint "BT"
493 Memory reference with index register and long displacement that
494 does *not* refer to a literal pool entry. "
495 (match_test "s390_mem_constraint (\"BT\", op)"))
498 (define_address_constraint "U"
499 "Pointer with short displacement. (deprecated - use ZQZR)"
500 (match_test "s390_mem_constraint (\"U\", op)"))
502 (define_address_constraint "W"
503 "Pointer with long displacement. (deprecated - use ZSZT)"
504 (match_test "s390_mem_constraint (\"W\", op)"))
507 (define_address_constraint "ZQ"
508 "Pointer without index register and with short displacement."
509 (match_test "s390_mem_constraint (\"ZQ\", op)"))
511 (define_address_constraint "ZR"
512 "Pointer with index register and short displacement."
513 (match_test "s390_mem_constraint (\"ZR\", op)"))
515 (define_address_constraint "ZS"
516 "Pointer without index register but with long displacement."
517 (match_test "s390_mem_constraint (\"ZS\", op)"))
519 (define_address_constraint "ZT"
520 "Pointer with index register and long displacement."
521 (match_test "s390_mem_constraint (\"ZT\", op)"))