gcc/config/xtensa/predicates.md

   1 ;; Predicate definitions for Xtensa.
   2 ;; Copyright (C) 2005-2015 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 (define_predicate "add_operand"
  21   (ior (and (match_code "const_int")
  22             (match_test "xtensa_simm8 (INTVAL (op))
  23                          || xtensa_simm8x256 (INTVAL (op))"))
  24        (match_operand 0 "register_operand")))
  25
  26 (define_predicate "addsubx_operand"
  27   (and (match_code "const_int")
  28        (match_test "INTVAL (op) == 2
  29                     || INTVAL (op) == 4
  30                     || INTVAL (op) == 8")))
  31
  32 (define_predicate "arith_operand"
  33   (ior (and (match_code "const_int")
  34             (match_test "xtensa_simm8 (INTVAL (op))"))
  35        (match_operand 0 "register_operand")))
  36
  37 ;; Non-immediate operand excluding the constant pool.
  38 (define_predicate "nonimmed_operand"
  39   (ior (and (match_operand 0 "memory_operand")
  40             (match_test "!constantpool_mem_p (op)"))
  41        (match_operand 0 "register_operand")))
  42
  43 ;; Memory operand excluding the constant pool.
  44 (define_predicate "mem_operand"
  45   (and (match_operand 0 "memory_operand")
  46        (match_test "!constantpool_mem_p (op)")))
  47
  48 ;; Memory operand in the constant pool.
  49 (define_predicate "constantpool_operand"
  50   (match_test "constantpool_mem_p (op)"))
  51
  52 (define_predicate "mask_operand"
  53   (ior (and (match_code "const_int")
  54             (match_test "xtensa_mask_immediate (INTVAL (op))"))
  55        (match_operand 0 "register_operand")))
  56
  57 (define_predicate "extui_fldsz_operand"
  58   (and (match_code "const_int")
  59        (match_test "xtensa_mask_immediate ((1 << INTVAL (op)) - 1)")))
  60
  61 (define_predicate "sext_operand"
  62   (if_then_else (match_test "TARGET_SEXT")
  63                 (match_operand 0 "nonimmed_operand")
  64                 (match_operand 0 "mem_operand")))
  65
  66 (define_predicate "sext_fldsz_operand"
  67   (and (match_code "const_int")
  68        (match_test "INTVAL (op) >= 8 && INTVAL (op) <= 23")))
  69
  70 (define_predicate "lsbitnum_operand"
  71   (and (match_code "const_int")
  72        (match_test "BITS_BIG_ENDIAN
  73                     ? (INTVAL (op) == BITS_PER_WORD - 1)
  74                     : (INTVAL (op) == 0)")))
  75
  76 (define_predicate "branch_operand"
  77   (ior (and (match_code "const_int")
  78             (match_test "xtensa_b4const_or_zero (INTVAL (op))"))
  79        (match_operand 0 "register_operand")))
  80
  81 (define_predicate "ubranch_operand"
  82   (ior (and (match_code "const_int")
  83             (match_test "xtensa_b4constu (INTVAL (op))"))
  84        (match_operand 0 "register_operand")))
  85
  86 (define_predicate "call_insn_operand"
  87   (match_code "const_int,const,symbol_ref,reg")
  88 {
  89   if ((GET_CODE (op) == REG)
  90       && (op != arg_pointer_rtx)
  91       && ((REGNO (op) < FRAME_POINTER_REGNUM)
  92           || (REGNO (op) > LAST_VIRTUAL_REGISTER)))
  93     return true;
  94
  95   if (CONSTANT_ADDRESS_P (op))
  96     {
  97       /* Direct calls only allowed to static functions with PIC.  */
  98       if (flag_pic)
  99         {
 100           tree callee;
 101           const char * callee_sec, * caller_sec;
 102
 103           if (GET_CODE (op) != SYMBOL_REF
 104               || !SYMBOL_REF_LOCAL_P (op) || SYMBOL_REF_EXTERNAL_P (op))
 105             return false;
 106
 107           /* Don't attempt a direct call if the callee is known to be in
 108              a different section, since there's a good chance it will be
 109              out of range.  */
 110
 111           if (flag_function_sections
 112               || DECL_ONE_ONLY (current_function_decl))
 113             return false;
 114           caller_sec = DECL_SECTION_NAME (current_function_decl);
 115           callee = SYMBOL_REF_DECL (op);
 116           if (callee)
 117             {
 118               if (DECL_ONE_ONLY (callee))
 119                 return false;
 120               callee_sec = DECL_SECTION_NAME (callee);
 121               if (((caller_sec == NULL) ^ (callee_sec == NULL))
 122                   || (caller_sec != NULL
 123                       && caller_sec != callee_sec))
 124                 return false;
 125             }
 126           else if (caller_sec)
 127             return false;
 128         }
 129       return true;
 130     }
 131
 132   return false;
 133 })
 134
 135 (define_predicate "move_operand"
 136   (ior
 137      (ior (match_operand 0 "register_operand")
 138           (and (match_operand 0 "memory_operand")
 139                (match_test "!constantpool_mem_p (op)
 140                             || GET_MODE_SIZE (mode) % UNITS_PER_WORD == 0")))
 141      (ior (and (match_code "const_int")
 142                (match_test "GET_MODE_CLASS (mode) == MODE_INT
 143                             && xtensa_simm12b (INTVAL (op))"))
 144           (and (match_code "const_int,const_double,const,symbol_ref,label_ref")
 145                (match_test "(TARGET_CONST16 || TARGET_AUTO_LITPOOLS)
 146                             && CONSTANT_P (op)
 147                             && GET_MODE_SIZE (mode) % UNITS_PER_WORD == 0")))))
 148
 149 ;; Accept the floating point constant 1 in the appropriate mode.
 150 (define_predicate "const_float_1_operand"
 151   (match_code "const_double")
 152 {
 153   REAL_VALUE_TYPE d;
 154   REAL_VALUE_FROM_CONST_DOUBLE (d, op);
 155   return REAL_VALUES_EQUAL (d, dconst1);
 156 })
 157
 158 (define_predicate "fpmem_offset_operand"
 159   (and (match_code "const_int")
 160        (match_test "xtensa_mem_offset (INTVAL (op), SFmode)")))
 161
 162 (define_predicate "branch_operator"
 163   (match_code "eq,ne,lt,ge"))
 164
 165 (define_predicate "ubranch_operator"
 166   (match_code "ltu,geu"))
 167
 168 (define_predicate "boolean_operator"
 169   (match_code "eq,ne"))
 170
 171 (define_predicate "xtensa_cstoresi_operator"
 172   (match_code "eq,ne,gt,ge,lt,le"))
 173
 174 (define_predicate "tls_symbol_operand"
 175   (and (match_code "symbol_ref")
 176        (match_test "SYMBOL_REF_TLS_MODEL (op) != 0")))