gcc/config/mips/predicates.md

   1 ;; Predicate definitions for MIPS.
   2 ;; Copyright (C) 2004 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 2, 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 COPYING.  If not, write to
  18 ;; the Free Software Foundation, 59 Temple Place - Suite 330,
  19 ;; Boston, MA 02111-1307, USA.
  20
  21 (define_predicate "const_uns_arith_operand"
  22   (and (match_code "const_int")
  23        (match_test "SMALL_OPERAND_UNSIGNED (INTVAL (op))")))
  24
  25 (define_predicate "uns_arith_operand"
  26   (ior (match_operand 0 "const_uns_arith_operand")
  27        (match_operand 0 "register_operand")))
  28
  29 (define_predicate "const_arith_operand"
  30   (and (match_code "const_int")
  31        (match_test "SMALL_OPERAND (INTVAL (op))")))
  32
  33 (define_predicate "arith_operand"
  34   (ior (match_operand 0 "const_arith_operand")
  35        (match_operand 0 "register_operand")))
  36
  37 (define_predicate "sle_operand"
  38   (and (match_code "const_int")
  39        (match_test "SMALL_OPERAND (INTVAL (op) + 1)")))
  40
  41 (define_predicate "sleu_operand"
  42   (and (match_operand 0 "sle_operand")
  43        (match_test "INTVAL (op) + 1 != 0")))
  44
  45 (define_predicate "const_0_operand"
  46   (and (match_code "const_int,const_double,const_vector")
  47        (match_test "op == CONST0_RTX (GET_MODE (op))")))
  48
  49 (define_predicate "reg_or_0_operand"
  50   (ior (and (match_operand 0 "const_0_operand")
  51             (match_test "!TARGET_MIPS16"))
  52        (match_operand 0 "register_operand")))
  53
  54 (define_predicate "const_1_operand"
  55   (and (match_code "const_int,const_double,const_vector")
  56        (match_test "op == CONST1_RTX (GET_MODE (op))")))
  57
  58 (define_predicate "reg_or_1_operand"
  59   (ior (match_operand 0 "const_1_operand")
  60        (match_operand 0 "register_operand")))
  61
  62 ;; This is used for indexing into vectors, and hence only accepts const_int.
  63 (define_predicate "const_0_or_1_operand"
  64   (and (match_code "const_int")
  65        (ior (match_test "op == CONST0_RTX (GET_MODE (op))")
  66             (match_test "op == CONST1_RTX (GET_MODE (op))"))))
  67
  68 (define_predicate "fpr_operand"
  69   (and (match_code "reg")
  70        (match_test "FP_REG_P (REGNO (op))")))
  71
  72 (define_predicate "lo_operand"
  73   (and (match_code "reg")
  74        (match_test "REGNO (op) == LO_REGNUM")))
  75
  76 (define_predicate "fcc_reload_operand"
  77   (and (match_code "reg,subreg")
  78        (match_test "ST_REG_P (true_regnum (op))")))
  79
  80 (define_special_predicate "pc_or_label_operand"
  81   (match_code "pc,label_ref"))
  82
  83 (define_predicate "const_call_insn_operand"
  84   (match_code "const,symbol_ref,label_ref")
  85 {
  86   enum mips_symbol_type symbol_type;
  87
  88   if (!mips_symbolic_constant_p (op, &symbol_type))
  89     return false;
  90
  91   switch (symbol_type)
  92     {
  93     case SYMBOL_GENERAL:
  94       /* If -mlong-calls, force all calls to use register addressing.  */
  95       return !TARGET_LONG_CALLS;
  96
  97     case SYMBOL_GOT_GLOBAL:
  98       /* Without explicit relocs, there is no special syntax for
  99          loading the address of a call destination into a register.
 100          Using "la $25,foo; jal $25" would prevent the lazy binding
 101          of "foo", so keep the address of global symbols with the
 102          jal macro.  */
 103       return !TARGET_EXPLICIT_RELOCS;
 104
 105     default:
 106       return false;
 107     }
 108 })
 109
 110 (define_predicate "call_insn_operand"
 111   (ior (match_operand 0 "const_call_insn_operand")
 112        (match_operand 0 "register_operand")))
 113
 114 (define_predicate "move_operand"
 115   (match_operand 0 "general_operand")
 116 {
 117   switch (GET_CODE (op))
 118     {
 119     case CONST_INT:
 120       /* When generating mips16 code, LEGITIMATE_CONSTANT_P rejects
 121          CONST_INTs that can't be loaded using simple insns.  */
 122       if (TARGET_MIPS16)
 123         return true;
 124
 125       /* When generating 32-bit code, allow DImode move_operands to
 126          match arbitrary constants.  We split them after reload.  */
 127       if (!TARGET_64BIT && mode == DImode)
 128         return true;
 129
 130       /* Otherwise check whether the constant can be loaded in a single
 131          instruction.  */
 132       return LUI_INT (op) || SMALL_INT (op) || SMALL_INT_UNSIGNED (op);
 133
 134     case CONST:
 135     case SYMBOL_REF:
 136     case LABEL_REF:
 137       return CONST_GP_P (op) || mips_atomic_symbolic_constant_p (op);
 138
 139     default:
 140       return true;
 141     }
 142 })
 143
 144 (define_predicate "consttable_operand"
 145   (match_test "CONSTANT_P (op)"))
 146
 147 (define_predicate "symbolic_operand"
 148   (match_code "const,symbol_ref,label_ref")
 149 {
 150   enum mips_symbol_type type;
 151   return mips_symbolic_constant_p (op, &type);
 152 })
 153
 154 (define_predicate "general_symbolic_operand"
 155   (match_code "const,symbol_ref,label_ref")
 156 {
 157   enum mips_symbol_type type;
 158   return mips_symbolic_constant_p (op, &type) && type == SYMBOL_GENERAL;
 159 })
 160
 161 (define_predicate "global_got_operand"
 162   (match_code "const,symbol_ref,label_ref")
 163 {
 164   enum mips_symbol_type type;
 165   return mips_symbolic_constant_p (op, &type) && type == SYMBOL_GOT_GLOBAL;
 166 })
 167
 168 (define_predicate "local_got_operand"
 169   (match_code "const,symbol_ref,label_ref")
 170 {
 171   enum mips_symbol_type type;
 172   return mips_symbolic_constant_p (op, &type) && type == SYMBOL_GOT_LOCAL;
 173 })
 174
 175 (define_predicate "stack_operand"
 176   (and (match_code "mem")
 177        (match_test "mips_stack_address_p (XEXP (op, 0), GET_MODE (op))")))
 178
 179 (define_predicate "macc_msac_operand"
 180   (ior (and (match_code "plus") (match_test "ISA_HAS_MACC"))
 181        (and (match_code "minus") (match_test "ISA_HAS_MSAC")))
 182 {
 183   rtx mult = XEXP (op, GET_CODE (op) == PLUS ? 0 : 1);
 184   rtx accum = XEXP (op, GET_CODE (op) == PLUS ? 1 : 0);
 185   return (GET_CODE (mult) == MULT
 186           && REG_P (XEXP (mult, 0))
 187           && REG_P (XEXP (mult, 1))
 188           && REG_P (accum));
 189 })
 190
 191
 192 (define_predicate "equality_operator"
 193   (match_code "eq,ne"))
 194
 195 (define_predicate "extend_operator"
 196   (match_code "zero_extend,sign_extend"))
 197
 198 (define_predicate "trap_comparison_operator"
 199   (match_code "eq,ne,lt,ltu,ge,geu"))
 200
 201
 202 (define_predicate "small_data_pattern"
 203   (and (match_code "set,parallel,unspec,unspec_volatile,prefetch")
 204        (match_test "mips_small_data_pattern_p (op)")))