gcc/config/microblaze/predicates.md

   1 ;; Predicate definitions for Xilinx MicroBlaze
   2 ;; Copyright (C) 2009-2016 Free Software Foundation, Inc.
   3 ;;
   4 ;; Contributed by Michael Eager <eager@eagercon.com>.
   5 ;;
   6 ;; This file is part of GCC.
   7 ;;
   8 ;; GCC is free software; you can redistribute it and/or modify
   9 ;; it under the terms of the GNU General Public License as published by
  10 ;; the Free Software Foundation; either version 3, or (at your option)
  11 ;; any later version.
  12 ;;
  13 ;; GCC is distributed in the hope that it will be useful,
  14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 ;; GNU General Public License for more details.
  17 ;;
  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/>.
  21
  22
  23 ;; Return whether OP can be used as an operands in arithmetic.
  24 (define_predicate "arith_operand"
  25   (ior (match_code "const_int,const_double")
  26        (match_operand 0 "register_operand")))
  27
  28 (define_predicate "arith_operand32"
  29   (ior (match_operand 0 "register_operand")
  30        (and (match_code "const_int,const_double")
  31             (match_test "LARGE_INT (op)"))))
  32
  33 (define_predicate "arith_plus_operand"
  34  (match_operand 0 "general_operand")
  35 {
  36   switch (GET_CODE (op))
  37     {
  38       default:
  39         return 0;
  40       case CONST_INT:
  41       case REG:
  42         return 1;
  43       case SYMBOL_REF:
  44       case LABEL_REF:
  45         if (flag_pic || microblaze_tls_referenced_p(op))
  46           return 0;
  47         return 1;
  48       case CONST:
  49         {
  50           rtx const0;
  51           const0 = XEXP (op, 0);
  52
  53           switch (GET_CODE(const0))
  54             {
  55               default:
  56                 return 0;
  57               case UNSPEC :
  58                 return 1;
  59
  60               case PLUS :
  61                 {
  62                   rtx p0, p1;
  63                   p0 = XEXP (const0, 0);
  64                   p1 = XEXP (const0, 1);
  65
  66                   if ((GET_CODE(p0) == SYMBOL_REF
  67                        || GET_CODE (p0) == LABEL_REF)
  68                       && GET_CODE(p1) == CONST_INT)
  69                     {
  70                       return arith_plus_operand (p0, GET_MODE(p0));
  71                     }
  72                 }
  73             }
  74         }
  75     }
  76   return 0;
  77 })
  78
  79 (define_predicate "const_0_operand"
  80   (and (match_code "const_int,const_double")
  81        (match_test "op == CONST0_RTX (GET_MODE (op))")))
  82
  83 ;; Return whether OP is a register or the constant 0.
  84 (define_predicate "reg_or_0_operand"
  85   (ior (match_operand 0 "const_0_operand")
  86        (match_operand 0 "register_operand")))
  87
  88 (define_predicate "reg_or_mem_operand"
  89   (ior (match_operand 0 "memory_operand")
  90        (match_operand 0 "register_operand")))
  91
  92 ;;  Return if the operand is either the PC or a label_ref.
  93 (define_special_predicate "pc_or_label_operand"
  94   (ior (match_code "pc,label_ref")
  95        (and (match_code "symbol_ref")
  96             (match_test "!(strcmp ((XSTR (op, 0)), \"_stack_overflow_exit\"))"))))
  97
  98 ;; Test for valid call operand
  99 (define_predicate "call_insn_operand"
 100   (match_test "CALL_INSN_OP (op)"))
 101
 102 (define_predicate "call_insn_simple_operand"
 103   (and (match_test "CALL_INSN_OP (op)")
 104        (match_test "GET_CODE (op) == REG || GET_CODE (op) == SYMBOL_REF || GET_CODE (op) == CONST_INT")))
 105
 106 ;; Return if OPERAND is valid as a source operand for a move instruction.
 107 (define_predicate "move_src_operand"
 108   (and (
 109      not (
 110        and (match_code "plus")
 111            (not (match_test "(GET_CODE (XEXP (op, 0)) == REG) ^ (GET_CODE (XEXP (op,1)) == REG)"))
 112          )
 113        )
 114        (match_operand 0 "general_operand"))
 115 {
 116   if (microblaze_tls_referenced_p(op)
 117       || (flag_pic && (symbol_mentioned_p(op) || label_mentioned_p(op))))
 118     return false;
 119
 120   return true;
 121 })
 122
 123 ;; Test for valid PIC call operand
 124 (define_predicate "call_insn_plt_operand"
 125   (match_test "PLT_ADDR_P (op)"))
 126
 127 ;; Return if the code of this rtx pattern is a comparison.
 128 (define_predicate "cmp_op"
 129   (match_code "gt,ge,gtu,geu,lt,le,ltu,leu"))