1 ;; Constraint definitions for MIPS.
2 ;; Copyright (C) 2006-2017 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 3, 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 COPYING3. If not see
18 ;; <http://www.gnu.org/licenses/>.
20 ;; Register constraints
22 (define_register_constraint "d" "TARGET_MIPS16 ? M16_REGS : GR_REGS"
23 "A general-purpose register. This is equivalent to @code{r} unless
24 generating MIPS16 code, in which case the MIPS16 register set is used.")
26 (define_register_constraint "t" "T_REG"
29 (define_register_constraint "f" "TARGET_HARD_FLOAT ? FP_REGS : NO_REGS"
30 "A floating-point register (if available).")
32 (define_register_constraint "h" "NO_REGS"
33 "Formerly the @code{hi} register. This constraint is no longer supported.")
35 (define_register_constraint "l" "TARGET_BIG_ENDIAN ? MD1_REG : MD0_REG"
36 "The @code{lo} register. Use this register to store values that are
37 no bigger than a word.")
39 (define_register_constraint "x" "MD_REGS"
40 "The concatenated @code{hi} and @code{lo} registers. Use this register
41 to store doubleword values.")
43 (define_register_constraint "b" "ALL_REGS"
46 (define_register_constraint "u" "M16_REGS"
49 ;; MIPS16 code always calls through a MIPS16 register; see mips_emit_call_insn
51 (define_register_constraint "c" "TARGET_MIPS16 ? M16_REGS
52 : TARGET_USE_PIC_FN_ADDR_REG ? PIC_FN_ADDR_REG
54 "A register suitable for use in an indirect jump. This will always be
55 @code{$25} for @option{-mabicalls}.")
57 (define_register_constraint "e" "LEA_REGS"
60 (define_register_constraint "j" "PIC_FN_ADDR_REG"
63 ;; Don't use this constraint in gcc code! It runs the risk of
64 ;; introducing a spill failure; see tls_get_tp_<mode>.
65 (define_register_constraint "v" "V1_REG"
66 "Register @code{$3}. Do not use this constraint in new code;
67 it is retained only for compatibility with glibc.")
69 (define_register_constraint "y" "GR_REGS"
70 "Equivalent to @code{r}; retained for backwards compatibility.")
72 (define_register_constraint "z" "ST_REGS"
73 "A floating-point condition code register.")
75 (define_register_constraint "A" "DSP_ACC_REGS"
78 (define_register_constraint "a" "ACC_REGS"
81 (define_register_constraint "B" "COP0_REGS"
84 (define_register_constraint "C" "COP2_REGS"
87 (define_register_constraint "D" "COP3_REGS"
90 ;; Registers that can be used as the target of multiply-accumulate
91 ;; instructions. The core MIPS32 ISA provides a hi/lo madd,
92 ;; but the DSP version allows any accumulator target.
93 (define_register_constraint "ka" "ISA_HAS_DSP_MULT ? ACC_REGS : MD_REGS")
95 (define_register_constraint "kb" "M16_STORE_REGS"
98 (define_constraint "kf"
100 (match_operand 0 "force_to_mem_operand"))
102 ;; This is a normal rather than a register constraint because we can
103 ;; never use the stack pointer as a reload register.
104 (define_constraint "ks"
106 (and (match_code "reg")
107 (match_test "REGNO (op) == STACK_POINTER_REGNUM")))
109 ;; Integer constraints
111 (define_constraint "I"
112 "A signed 16-bit constant (for arithmetic instructions)."
113 (and (match_code "const_int")
114 (match_test "SMALL_OPERAND (ival)")))
116 (define_constraint "J"
118 (and (match_code "const_int")
119 (match_test "ival == 0")))
121 (define_constraint "K"
122 "An unsigned 16-bit constant (for logic instructions)."
123 (and (match_code "const_int")
124 (match_test "SMALL_OPERAND_UNSIGNED (ival)")))
126 (define_constraint "L"
127 "A signed 32-bit constant in which the lower 16 bits are zero.
128 Such constants can be loaded using @code{lui}."
129 (and (match_code "const_int")
130 (match_test "LUI_OPERAND (ival)")))
132 (define_constraint "M"
133 "A constant that cannot be loaded using @code{lui}, @code{addiu}
135 (and (match_code "const_int")
136 (not (match_test "SMALL_OPERAND (ival)"))
137 (not (match_test "SMALL_OPERAND_UNSIGNED (ival)"))
138 (not (match_test "LUI_OPERAND (ival)"))))
140 (define_constraint "N"
141 "A constant in the range -65535 to -1 (inclusive)."
142 (and (match_code "const_int")
143 (match_test "ival >= -0xffff && ival < 0")))
145 (define_constraint "O"
146 "A signed 15-bit constant."
147 (and (match_code "const_int")
148 (match_test "ival >= -0x4000 && ival < 0x4000")))
150 (define_constraint "P"
151 "A constant in the range 1 to 65535 (inclusive)."
152 (and (match_code "const_int")
153 (match_test "ival > 0 && ival < 0x10000")))
155 ;; Floating-point constraints
157 (define_constraint "G"
158 "Floating-point zero."
159 (and (match_code "const_double")
160 (match_test "op == CONST0_RTX (mode)")))
162 ;; General constraints
164 (define_constraint "Q"
166 (match_operand 0 "const_arith_operand"))
168 (define_memory_constraint "R"
169 "An address that can be used in a non-macro load or store."
170 (and (match_code "mem")
171 (match_test "mips_address_insns (XEXP (op, 0), mode, false) == 1")))
173 (define_constraint "S"
175 A constant call address."
176 (and (match_operand 0 "call_insn_operand")
177 (match_test "CONSTANT_P (op)")))
179 (define_constraint "Udb7"
181 A decremented unsigned constant of 7 bits."
182 (match_operand 0 "db7_operand"))
184 (define_constraint "Udb8"
186 A decremented unsigned constant of 8 bits."
187 (match_operand 0 "db8_operand"))
189 (define_constraint "Uead"
191 A microMIPS encoded ADDIUR2 immediate operand."
192 (match_operand 0 "addiur2_operand"))
194 (define_constraint "Uean"
196 A microMIPS encoded ANDI operand."
197 (match_operand 0 "andi16_operand"))
199 (define_constraint "Uesp"
201 A microMIPS encoded ADDIUSP operand."
202 (match_operand 0 "addiusp_operand"))
204 (define_constraint "Uib3"
206 An unsigned, incremented constant of 3 bits."
207 (match_operand 0 "ib3_operand"))
209 (define_constraint "Usb4"
211 A signed constant of 4 bits."
212 (match_operand 0 "sb4_operand"))
214 (define_constraint "Usb5"
216 A signed constant of 5 bits."
217 (match_operand 0 "sb5_operand"))
219 (define_constraint "Usb8"
221 A signed constant of 8 bits."
222 (match_operand 0 "sb8_operand"))
224 (define_constraint "Usd8"
226 A signed constant of 8 bits, shifted left three places."
227 (match_operand 0 "sd8_operand"))
229 (define_constraint "Uub8"
231 An unsigned constant of 8 bits."
232 (match_operand 0 "ub8_operand"))
234 (define_constraint "Uuw5"
236 An unsigned constant of 5 bits, shifted left two places."
237 (match_operand 0 "uw5_operand"))
239 (define_constraint "Uuw6"
241 An unsigned constant of 6 bits, shifted left two places."
242 (match_operand 0 "uw6_operand"))
244 (define_constraint "Uuw8"
246 An unsigned constant of 8 bits, shifted left two places."
247 (match_operand 0 "uw8_operand"))
249 (define_memory_constraint "W"
251 A memory address based on a member of @code{BASE_REG_CLASS}. This is
252 true for all non-mips16 references (although it can sometimes be implicit
253 if @samp{!TARGET_EXPLICIT_RELOCS}). For MIPS16, it excludes stack and
254 constant-pool references."
255 (and (match_code "mem")
256 (match_operand 0 "memory_operand")
257 (ior (not (match_test "TARGET_MIPS16"))
258 (and (not (match_operand 0 "stack_operand"))
259 (not (match_test "CONSTANT_P (XEXP (op, 0))"))))))
261 (define_constraint "YG"
264 (and (match_code "const_vector")
265 (match_test "op == CONST0_RTX (mode)")))
267 (define_constraint "YA"
269 An unsigned 6-bit constant."
270 (and (match_code "const_int")
271 (match_test "UIMM6_OPERAND (ival)")))
273 (define_constraint "YB"
275 A signed 10-bit constant."
276 (and (match_code "const_int")
277 (match_test "IMM10_OPERAND (ival)")))
279 (define_constraint "Yb"
281 (match_operand 0 "qi_mask_operand"))
283 (define_constraint "Yd"
285 A constant @code{move_operand} that can be safely loaded into @code{$25}
287 (and (match_operand 0 "move_operand")
288 (match_test "CONSTANT_P (op)")
289 (not (match_test "mips_dangerous_for_la25_p (op)"))))
291 (define_constraint "Yf"
293 A constant @code{move_operand} that cannot be safely loaded into @code{$25}
295 (and (match_operand 0 "move_operand")
296 (match_test "CONSTANT_P (op)")
297 (match_test "mips_dangerous_for_la25_p (op)")))
299 (define_constraint "Yh"
301 (match_operand 0 "hi_mask_operand"))
303 (define_constraint "Yw"
305 (match_operand 0 "si_mask_operand"))
307 (define_constraint "Yx"
309 (match_operand 0 "low_bitmask_operand"))
311 (define_constraint "YI"
313 A replicated vector const in which the replicated value is in the range
315 (and (match_code "const_vector")
316 (match_test "mips_const_vector_same_int_p (op, mode, -512, 511)")))
318 (define_constraint "YC"
320 A replicated vector const in which the replicated value has a single
322 (and (match_code "const_vector")
323 (match_test "mips_const_vector_bitimm_set_p (op, mode)")))
325 (define_constraint "YZ"
327 A replicated vector const in which the replicated value has a single
329 (and (match_code "const_vector")
330 (match_test "mips_const_vector_bitimm_clr_p (op, mode)")))
332 (define_constraint "Unv5"
334 A replicated vector const in which the replicated value is in the range
336 (and (match_code "const_vector")
337 (match_test "mips_const_vector_same_int_p (op, mode, -31, 0)")))
339 (define_constraint "Uuv5"
341 A replicated vector const in which the replicated value is in the range
343 (and (match_code "const_vector")
344 (match_test "mips_const_vector_same_int_p (op, mode, 0, 31)")))
346 (define_constraint "Usv5"
348 A replicated vector const in which the replicated value is in the range
350 (and (match_code "const_vector")
351 (match_test "mips_const_vector_same_int_p (op, mode, -16, 15)")))
353 (define_constraint "Uuv6"
355 A replicated vector const in which the replicated value is in the range
357 (and (match_code "const_vector")
358 (match_test "mips_const_vector_same_int_p (op, mode, 0, 63)")))
360 (define_constraint "Urv8"
362 A replicated vector const with replicated byte values as well as elements"
363 (and (match_code "const_vector")
364 (match_test "mips_const_vector_same_bytes_p (op, mode)")))
366 (define_memory_constraint "ZC"
367 "A memory operand whose address is formed by a base register and offset
368 that is suitable for use in instructions with the same addressing mode
369 as @code{ll} and @code{sc}."
370 (and (match_code "mem")
372 (match_test "TARGET_MICROMIPS")
373 (match_test "umips_12bit_offset_address_p (XEXP (op, 0), mode)")
374 (if_then_else (match_test "ISA_HAS_9BIT_DISPLACEMENT")
375 (match_test "mips_9bit_offset_address_p (XEXP (op, 0), mode)")
376 (match_test "mips_address_insns (XEXP (op, 0), mode, false)")))))
378 (define_address_constraint "ZD"
379 "An address suitable for a @code{prefetch} instruction, or for any other
380 instruction with the same addressing mode as @code{prefetch}."
381 (if_then_else (match_test "TARGET_MICROMIPS")
382 (match_test "umips_12bit_offset_address_p (op, mode)")
383 (if_then_else (match_test "ISA_HAS_9BIT_DISPLACEMENT")
384 (match_test "mips_9bit_offset_address_p (op, mode)")
385 (match_test "mips_address_insns (op, mode, false)"))))
387 (define_memory_constraint "ZR"
389 An address valid for loading/storing register exclusive"
390 (match_operand 0 "mem_noofs_operand"))
392 (define_memory_constraint "ZS"
394 A microMIPS memory operand for use with the LWSP/SWSP insns."
395 (and (match_code "mem")
396 (match_operand 0 "lwsp_swsp_operand")))
398 (define_memory_constraint "ZT"
400 A microMIPS memory operand for use with the LW16/SW16 insns."
401 (and (match_code "mem")
402 (match_operand 0 "lw16_sw16_operand")))
404 (define_memory_constraint "ZU"
406 A microMIPS memory operand for use with the LHU16/SH16 insns."
407 (and (match_code "mem")
408 (match_operand 0 "lhu16_sh16_operand")))
410 (define_memory_constraint "ZV"
412 A microMIPS memory operand for use with the SB16 insn."
413 (and (match_code "mem")
414 (match_operand 0 "sb16_operand")))
416 (define_memory_constraint "ZW"
418 A microMIPS memory operand for use with the LBU16 insn."
419 (and (match_code "mem")
420 (match_operand 0 "lbu16_operand")))