gcc/config/pa/predicates.md

   1 ;; Predicate definitions for HP PA-RISC.
   2 ;; Copyright (C) 2005-2013 Free Software Foundation, Inc.
   3 ;;
   4 ;; This file is part of GCC.
   5 ;;
   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)
   9 ;; any later version.
  10 ;;
  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.
  15 ;;
  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/>.
  19
  20 ;; Return truth value of whether OP is an integer which fits the range
  21 ;; constraining 5-bit signed immediate operands in three-address insns.
  22
  23 (define_predicate "int5_operand"
  24   (and (match_code "const_int")
  25        (match_test "INT_5_BITS (op)")))
  26
  27 ;; Return truth value of whether OP is an integer which fits the range
  28 ;; constraining 5-bit unsigned immediate operands in three-address insns.
  29
  30 (define_predicate "uint5_operand"
  31   (and (match_code "const_int")
  32        (match_test "INT_U5_BITS (op)")))
  33
  34 ;; Return truth value of whether OP is an integer which fits the range
  35 ;; constraining 6-bit unsigned immediate operands in three-address insns.
  36
  37 (define_predicate "uint6_operand"
  38   (and (match_code "const_int")
  39        (match_test "INT_U6_BITS (op)")))
  40
  41 ;; Return truth value of whether OP is an integer which fits the range
  42 ;; constraining 11-bit signed immediate operands in three-address insns.
  43
  44 (define_predicate "int11_operand"
  45   (and (match_code "const_int")
  46        (match_test "INT_11_BITS (op)")))
  47
  48 ;; Return truth value of whether OP is an integer which fits the range
  49 ;; constraining 14-bit signed immediate operands in three-address insns.
  50
  51 (define_predicate "int14_operand"
  52   (and (match_code "const_int")
  53        (match_test "INT_14_BITS (op)")))
  54
  55 ;; True iff OP is a const_int or const_double that will fit in 32 bits.
  56
  57 (define_predicate "uint32_operand"
  58   (if_then_else (match_test "HOST_BITS_PER_WIDE_INT > 32")
  59     (and (match_code "const_int")
  60          (match_test "INTVAL (op) >= 0
  61                       && INTVAL (op) < (HOST_WIDE_INT) 1 << 32"))
  62     (and (match_code "const_int,const_double")
  63          (match_test "CONST_INT_P (op) || CONST_DOUBLE_HIGH (op) == 0"))))
  64
  65 ;; True iff depi can be used to compute (reg | OP).
  66
  67 (define_predicate "cint_ior_operand"
  68   (and (match_code "const_int")
  69        (match_test "pa_ior_mask_p (INTVAL (op))")))
  70
  71 ;; True iff OP is CONST_INT that can be moved in one instruction
  72 ;; into a general register.
  73
  74 (define_predicate "cint_move_operand"
  75   (and (match_code "const_int")
  76        (match_test "pa_cint_ok_for_move (INTVAL (op))")))
  77
  78 ;; True iff OP is a CONST0_RTX for MODE.
  79
  80 (define_predicate "const_0_operand"
  81   (and (match_code "const_int,const_double")
  82        (match_test "op == CONST0_RTX (mode)")))
  83
  84 ;; A constant integer suitable for use in a PRE_MODIFY memory reference.
  85
  86 (define_predicate "pre_cint_operand"
  87   (and (match_code "const_int")
  88        (match_test "INTVAL (op) >= -0x2000 && INTVAL (op) < 0x10")))
  89
  90 ;; A constant integer suitable for use in a POST_MODIFY memory reference.
  91
  92 (define_predicate "post_cint_operand"
  93   (and (match_code "const_int")
  94        (match_test "INTVAL (op) < 0x2000 && INTVAL (op) >= -0x10")))
  95
  96 ;; True iff depi or extru can be used to compute (reg & OP).
  97
  98 (define_predicate "and_operand"
  99   (ior (match_operand 0 "register_operand")
 100        (and (match_code "const_int")
 101             (match_test "pa_and_mask_p (INTVAL (op))"))))
 102
 103 ;; Return truth value of whether OP can be used as an operand in a
 104 ;; three operand arithmetic insn that accepts registers of mode MODE
 105 ;; or 5-bit signed integers.
 106
 107 (define_predicate "arith5_operand"
 108   (ior (match_operand 0 "register_operand")
 109        (match_operand 0 "int5_operand")))
 110
 111 ;; Return truth value of whether OP can be used as an operand in a
 112 ;; three operand arithmetic insn that accepts registers of mode MODE
 113 ;; or 11-bit signed integers.
 114
 115 (define_predicate "arith11_operand"
 116   (ior (match_operand 0 "register_operand")
 117        (match_operand 0 "int11_operand")))
 118
 119 ;; Return truth value of whether OP can be used as an operand in a
 120 ;; three operand arithmetic insn that accepts registers of mode MODE
 121 ;; or 14-bit signed integers.
 122
 123 (define_predicate "arith14_operand"
 124   (ior (match_operand 0 "register_operand")
 125        (match_operand 0 "int14_operand")))
 126
 127 ;; Return truth value of whether OP can be used as an operand in a
 128 ;; three operand arithmetic insn that accepts registers of mode MODE
 129 ;; or 32-bit signed integers.
 130
 131 (define_predicate "arith32_operand"
 132   (ior (match_operand 0 "register_operand")
 133        (match_code "const_int")))
 134
 135 ;; Return truth value of whether OP can be used as a shift operand in
 136 ;; a shift insn that accepts registers of mode MODE or 5-bit shift amounts.
 137
 138 (define_predicate "shift5_operand"
 139   (ior (match_operand 0 "register_operand")
 140        (match_operand 0 "uint5_operand")))
 141
 142 ;; Return truth value of whether OP can be used as a shift operand in
 143 ;; a shift insn that accepts registers of mode MODE or 6-bit shift amounts.
 144
 145 (define_predicate "shift6_operand"
 146   (ior (match_operand 0 "register_operand")
 147        (match_operand 0 "uint6_operand")))
 148
 149 ;; True iff OP can be used as an operand in an adddi3 insn.
 150
 151 (define_predicate "adddi3_operand"
 152   (if_then_else (match_test "TARGET_64BIT")
 153     (match_operand 0 "arith14_operand")
 154     (match_operand 0 "arith11_operand")))
 155
 156 ;; True iff OP is valid as a base or index register in a REG+REG address.
 157
 158 (define_predicate "borx_reg_operand"
 159   (match_code "reg")
 160 {
 161   /* We must reject virtual registers as the only expressions that
 162      can be instantiated are REG and REG+CONST.  */
 163   if (op == virtual_incoming_args_rtx
 164       || op == virtual_stack_vars_rtx
 165       || op == virtual_stack_dynamic_rtx
 166       || op == virtual_outgoing_args_rtx
 167       || op == virtual_cfa_rtx)
 168     return false;
 169
 170   /* While it's always safe to index off the frame pointer, it's not
 171      profitable to do so when the frame pointer is being eliminated.  */
 172   if (!reload_completed
 173       && flag_omit_frame_pointer
 174       && !cfun->calls_alloca
 175       && op == frame_pointer_rtx)
 176     return false;
 177
 178   return register_operand (op, mode);
 179 })
 180
 181 ;; Return nonzero if OP is suitable for use in a call to a named
 182 ;; function.
 183 ;;
 184 ;; For 2.5 try to eliminate either call_operand_address or
 185 ;; function_label_operand, they perform very similar functions.
 186
 187 (define_predicate "call_operand_address"
 188   (match_code "label_ref,symbol_ref,const_int,const_double,const,high")
 189 {
 190   return (GET_MODE (op) == word_mode
 191           && CONSTANT_P (op) && ! TARGET_PORTABLE_RUNTIME);
 192 })
 193
 194 ;; True iff OP can be used as the divisor in a div millicode call.
 195
 196 (define_predicate "div_operand"
 197   (match_code "reg,const_int")
 198 {
 199   return (mode == SImode
 200           && ((REG_P (op) && REGNO (op) == 25)
 201               || (CONST_INT_P (op)
 202                   && INTVAL (op) > 0 && INTVAL (op) < 16
 203                   && pa_magic_milli[INTVAL (op)])));
 204 })
 205
 206 ;; True iff OP is a reloading floating point register
 207
 208 (define_predicate "fp_reg_operand"
 209   (and (match_code "reg")
 210        (match_test "reg_renumber && FP_REG_P (op)")))
 211
 212 ;; True iff OP is a function label operand.
 213
 214 (define_special_predicate "function_label_operand"
 215   (and (match_code "symbol_ref")
 216        (match_test "FUNCTION_NAME_P (XSTR (op, 0))")))
 217
 218 ;; True iff OP is an indexed memory operand.
 219
 220 (define_predicate "indexed_memory_operand"
 221   (match_code "subreg,mem")
 222 {
 223   if (GET_MODE (op) != mode)
 224     return false;
 225
 226   /* Before reload, a (SUBREG (MEM...)) forces reloading into a register.  */
 227   if (reload_completed && GET_CODE (op) == SUBREG)
 228     op = SUBREG_REG (op);
 229
 230   if (! MEM_P (op))
 231     return false;
 232
 233   op = XEXP (op, 0);
 234   return IS_INDEX_ADDR_P (op) && memory_address_p (mode, op);
 235 })
 236
 237 ;; True iff the operand OP can be used as the destination operand of
 238 ;; an integer store.  This also implies the operand could be used as
 239 ;; the source operand of an integer load.  Symbolic, lo_sum and indexed
 240 ;; memory operands are not allowed.  We accept reloading pseudos and
 241 ;; other memory operands.
 242
 243 (define_predicate "integer_store_memory_operand"
 244   (match_code "reg,mem")
 245 {
 246   return ((reload_in_progress
 247            && REG_P (op)
 248            && REGNO (op) >= FIRST_PSEUDO_REGISTER
 249            && reg_renumber [REGNO (op)] < 0)
 250           || (MEM_P (op)
 251               && (reload_in_progress || memory_address_p (mode, XEXP (op, 0)))
 252               && !symbolic_memory_operand (op, VOIDmode)
 253               && !IS_LO_SUM_DLT_ADDR_P (XEXP (op, 0))
 254               && !IS_INDEX_ADDR_P (XEXP (op, 0))));
 255 })
 256
 257 ;; Return true iff OP is an integer register.
 258
 259 (define_predicate "ireg_operand"
 260   (and (match_code "reg")
 261        (match_test "REGNO (op) > 0 && REGNO (op) < 32")))
 262
 263 ;; Return truth value of whether OP is an integer which fits the range
 264 ;; constraining immediate operands in three-address insns, or is an
 265 ;; integer register.
 266
 267 (define_predicate "ireg_or_int5_operand"
 268   (ior (match_operand 0 "ireg_operand")
 269        (match_operand 0 "int5_operand")))
 270
 271 ;; True iff OP is a CONST_INT of the forms 0...0xxxx, 0...01...1xxxx,
 272 ;; or 1...1xxxx. Such values can be the left hand side x in (x << r),
 273 ;; using the zvdepi instruction.
 274
 275 (define_predicate "lhs_lshift_cint_operand"
 276   (match_code "const_int")
 277 {
 278   unsigned HOST_WIDE_INT x;
 279   x = INTVAL (op) >> 4;
 280   return (x & (x + 1)) == 0;
 281 })
 282
 283 ;; True iff OP can be used in a zvdep instruction.
 284
 285 (define_predicate "lhs_lshift_operand"
 286   (ior (match_operand 0 "register_operand")
 287        (match_operand 0 "lhs_lshift_cint_operand")))
 288
 289 ;; Accept anything that can be used as a destination operand for a
 290 ;; move instruction.  We don't accept indexed memory operands since
 291 ;; they are supported only for floating point stores.
 292
 293 (define_predicate "move_dest_operand"
 294   (match_code "subreg,reg,mem")
 295 {
 296   if (register_operand (op, mode))
 297     return true;
 298
 299   if (GET_MODE (op) != mode)
 300     return false;
 301
 302   if (GET_CODE (op) == SUBREG)
 303     op = SUBREG_REG (op);
 304
 305   if (GET_CODE (op) != MEM || symbolic_memory_operand (op, mode))
 306     return false;
 307
 308   op = XEXP (op, 0);
 309
 310   return (memory_address_p (mode, op)
 311           && !IS_INDEX_ADDR_P (op)
 312           && !IS_LO_SUM_DLT_ADDR_P (op));
 313 })
 314
 315 ;; Accept anything that can be used as a source operand for a move
 316 ;; instruction.
 317
 318 (define_predicate "move_src_operand"
 319   (match_code "subreg,reg,const_int,const_double,mem")
 320 {
 321   if (register_operand (op, mode))
 322     return true;
 323
 324   if (op == CONST0_RTX (mode))
 325     return true;
 326
 327   if (CONST_INT_P (op))
 328     return pa_cint_ok_for_move (INTVAL (op));
 329
 330   if (GET_MODE (op) != mode)
 331     return false;
 332
 333   if (GET_CODE (op) == SUBREG)
 334     op = SUBREG_REG (op);
 335
 336   if (! MEM_P (op))
 337     return false;
 338
 339   /* Until problems with management of the REG_POINTER flag are resolved,
 340      we need to delay creating move insns with unscaled indexed addresses
 341      until CSE is not expected.  */
 342   if (!TARGET_NO_SPACE_REGS
 343       && !cse_not_expected
 344       && GET_CODE (XEXP (op, 0)) == PLUS
 345       && REG_P (XEXP (XEXP (op, 0), 0))
 346       && REG_P (XEXP (XEXP (op, 0), 1)))
 347     return false;
 348
 349   return memory_address_p (mode, XEXP (op, 0));
 350 })
 351
 352 ;; True iff OP is not a symbolic memory operand.
 353
 354 (define_predicate "nonsymb_mem_operand"
 355   (match_code "subreg,mem")
 356 {
 357   if (GET_CODE (op) == SUBREG)
 358     op = SUBREG_REG (op);
 359
 360   if (! MEM_P (op))
 361     return false;
 362
 363   /* Until problems with management of the REG_POINTER flag are resolved,
 364      we need to delay creating move insns with unscaled indexed addresses
 365      until CSE is not expected.  */
 366   if (!TARGET_NO_SPACE_REGS
 367       && !cse_not_expected
 368       && GET_CODE (XEXP (op, 0)) == PLUS
 369       && REG_P (XEXP (XEXP (op, 0), 0))
 370       && REG_P (XEXP (XEXP (op, 0), 1)))
 371     return false;
 372
 373   return (!symbolic_memory_operand (op, mode)
 374           && memory_address_p (mode, XEXP (op, 0)));
 375 })
 376
 377 ;; True iff OP is anything other than a hard register.
 378
 379 (define_predicate "non_hard_reg_operand"
 380   (match_test "! (REG_P (op) && REGNO (op) < FIRST_PSEUDO_REGISTER)"))
 381
 382 ;; True iff OP is a reference to a label whose address can be loaded
 383 ;; while generating PIC code.
 384
 385 (define_predicate "pic_label_operand"
 386   (match_code "label_ref,const")
 387 {
 388   if (!flag_pic)
 389     return false;
 390
 391   switch (GET_CODE (op))
 392     {
 393     case LABEL_REF:
 394       return true;
 395     case CONST:
 396       op = XEXP (op, 0);
 397       return (GET_CODE (XEXP (op, 0)) == LABEL_REF
 398               && CONST_INT_P (XEXP (op, 1)));
 399     default:
 400       gcc_unreachable ();
 401     }
 402   return false;
 403 })
 404
 405 ;; True iff the operand OP lives in text space.  OP is a symbolic operand.
 406 ;; If so, SYMBOL_REF_FLAG, which is set by pa_encode_section_info, is true.
 407
 408 (define_special_predicate "read_only_operand"
 409   (match_test "true")
 410 {
 411   if (GET_CODE (op) == CONST)
 412     op = XEXP (XEXP (op, 0), 0);
 413   if (GET_CODE (op) == SYMBOL_REF)
 414     {
 415       if (flag_pic)
 416         return SYMBOL_REF_FLAG (op) && !CONSTANT_POOL_ADDRESS_P (op);
 417       else
 418         return SYMBOL_REF_FLAG (op) || CONSTANT_POOL_ADDRESS_P (op);
 419     }
 420   return true;
 421 })
 422
 423 ;; True iff the operand is a register operand, or a non-symbolic
 424 ;; memory operand after reload.  A SUBREG is not accepted since it
 425 ;; will need a reload.
 426 ;;
 427 ;; This predicate is used for branch patterns that internally handle
 428 ;; register reloading.  We need to accept non-symbolic memory operands
 429 ;; after reload to ensure that the pattern is still valid if reload
 430 ;; didn't find a hard register for the operand.
 431
 432 (define_predicate "reg_before_reload_operand"
 433   (match_code "reg,mem")
 434 {
 435   if (register_operand (op, mode))
 436     return true;
 437
 438   if (reload_completed
 439       && memory_operand (op, mode)
 440       && !symbolic_memory_operand (op, mode))
 441     return true;
 442
 443   return false;
 444 })
 445
 446 ;; True iff OP is a register or const_0 operand for MODE.
 447
 448 (define_predicate "reg_or_0_operand"
 449   (ior (match_operand 0 "register_operand")
 450        (match_operand 0 "const_0_operand")))
 451
 452 ;; True iff OP is either a register, zero, or a non-symbolic memory operand.
 453
 454 (define_predicate "reg_or_0_or_nonsymb_mem_operand"
 455   (ior (match_operand 0 "reg_or_0_operand")
 456        (match_operand 0 "nonsymb_mem_operand")))
 457
 458 ;; Accept REG and any CONST_INT that can be moved in one instruction
 459 ;; into a general register.
 460
 461 (define_predicate "reg_or_cint_move_operand"
 462   (ior (match_operand 0 "register_operand")
 463        (match_operand 0 "cint_move_operand")))
 464
 465 ;; True iff OP can be used to compute (reg | OP).
 466
 467 (define_predicate "reg_or_cint_ior_operand"
 468   (ior (match_operand 0 "register_operand")
 469        (match_operand 0 "cint_ior_operand")))
 470
 471 ;; Return 1 if OP is a CONST_INT with the value 2, 4, or 8.  These are
 472 ;; the valid constants for shadd instructions.
 473
 474 (define_predicate "shadd_operand"
 475   (and (match_code "const_int")
 476        (match_test "pa_shadd_constant_p (INTVAL (op))")))
 477
 478 ;; Return truth value of statement that OP is a symbolic memory operand.
 479
 480 (define_predicate "symbolic_memory_operand"
 481   (match_code "subreg,mem")
 482 {
 483   if (GET_CODE (op) == SUBREG)
 484     op = SUBREG_REG (op);
 485   if (!MEM_P (op))
 486     return false;
 487   return pa_symbolic_expression_p (XEXP (op, 0));
 488 })
 489
 490 ;; True iff OP is a symbolic operand.
 491 ;; Note: an inline copy of this code is present in pa_secondary_reload.
 492
 493 (define_predicate "symbolic_operand"
 494   (match_code "symbol_ref,label_ref,const")
 495 {
 496   switch (GET_CODE (op))
 497     {
 498     case SYMBOL_REF:
 499       return !SYMBOL_REF_TLS_MODEL (op);
 500     case LABEL_REF:
 501       return true;
 502     case CONST:
 503       op = XEXP (op, 0);
 504       return (GET_CODE (op) == PLUS
 505               && ((GET_CODE (XEXP (op, 0)) == SYMBOL_REF
 506                    && !SYMBOL_REF_TLS_MODEL (XEXP (op, 0)))
 507                   || GET_CODE (XEXP (op, 0)) == LABEL_REF)
 508               && GET_CODE (XEXP (op, 1)) == CONST_INT);
 509     default:
 510       gcc_unreachable ();
 511     }
 512   return true;
 513 })
 514
 515 ;; Return true if OP is a symbolic operand for the TLS Global Dynamic model.
 516
 517 (define_predicate "tgd_symbolic_operand"
 518   (and (match_code "symbol_ref")
 519        (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_GLOBAL_DYNAMIC")))
 520
 521 ;; Return true if OP is a symbolic operand for the TLS Local Dynamic model.
 522
 523 (define_predicate "tld_symbolic_operand"
 524   (and (match_code "symbol_ref")
 525        (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_LOCAL_DYNAMIC")))
 526
 527 ;; Return true if OP is a symbolic operand for the TLS Initial Exec model.
 528
 529 (define_predicate "tie_symbolic_operand"
 530   (and (match_code "symbol_ref")
 531        (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_INITIAL_EXEC")))
 532
 533 ;; Return true if OP is a symbolic operand for the TLS Local Exec model.
 534
 535 (define_predicate "tle_symbolic_operand"
 536   (and (match_code "symbol_ref")
 537        (match_test "SYMBOL_REF_TLS_MODEL (op) == TLS_MODEL_LOCAL_EXEC")))
 538
 539 ;; True iff this is a comparison operator.  This allows the use of
 540 ;; MATCH_OPERATOR to recognize all the branch insns.
 541
 542 (define_predicate "cmpib_comparison_operator"
 543   (match_code "eq,ne,lt,le,leu,gt,gtu,ge"))
 544
 545 ;; True iff OP is an operator suitable for use in a movb instruction.
 546
 547 (define_predicate "movb_comparison_operator"
 548   (match_code "eq,ne,lt,ge"))
 549
 550 ;; True iff OP is a PLUS, XOR or IOR operator.
 551
 552 (define_predicate "plus_xor_ior_operator"
 553   (match_code "plus,xor,ior"))