gcc/config/c6x/predicates.md

   1 /* Predicates for TI C6X
   2    Copyright (C) 2010-2018 Free Software Foundation, Inc.
   3    Contributed by Andrew Jenner <andrew@codesourcery.com>
   4    Contributed by Bernd Schmidt <bernds@codesourcery.com>
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    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 (define_predicate "reg_or_const_int_operand"
  23   (ior (match_operand 0 "register_operand")
  24        (match_operand 0 "const_int_operand")))
  25
  26 (define_predicate "const_vector_operand"
  27   (match_code "const_vector"))
  28
  29 (define_predicate "scst5_operand"
  30   (and (match_operand 0 "const_int_operand")
  31        (match_test "satisfies_constraint_Is5 (op)")))
  32
  33 (define_predicate "reg_or_ucst4_operand"
  34   (ior (match_operand 0 "register_operand")
  35        (and (match_operand 0 "const_int_operand")
  36             (match_test "satisfies_constraint_Iu4 (op)"))))
  37
  38 (define_predicate "reg_or_scst5_operand"
  39   (ior (match_operand 0 "register_operand")
  40        (match_operand 0 "scst5_operand")))
  41
  42 (define_predicate "reg_or_ucst5_operand"
  43   (ior (match_operand 0 "register_operand")
  44        (and (match_operand 0 "const_int_operand")
  45             (match_test "satisfies_constraint_Iu5 (op)"))))
  46
  47 (define_predicate "addsi_operand"
  48   (ior (match_operand 0 "register_operand")
  49        (and (match_operand 0 "const_int_operand")
  50             (match_test "satisfies_constraint_IsB (op)"))))
  51
  52 (define_predicate "andsi_operand"
  53   (ior (match_operand 0 "reg_or_scst5_operand")
  54        (and (match_operand 0 "const_int_operand")
  55             (match_test "satisfies_constraint_Jc (op)"))))
  56
  57 (define_predicate "iorsi_operand"
  58   (ior (match_operand 0 "reg_or_scst5_operand")
  59        (and (match_operand 0 "const_int_operand")
  60             (match_test "satisfies_constraint_Js (op)"))))
  61
  62 (define_predicate "insv_operand"
  63   (and (match_operand 0 "const_int_operand")
  64        (match_test "INTVAL (op) == 0 || INTVAL (op) == -1")))
  65
  66 (define_predicate "c6x_jump_operand"
  67   (match_code "label_ref,symbol_ref,reg"))
  68
  69 (define_predicate "c6x_call_operand"
  70   (ior (match_code "symbol_ref,reg")
  71        (and (match_code "subreg")
  72             (match_test "GET_CODE (XEXP (op, 0)) == REG")))
  73 {
  74   /* The linker transforms jumps to undefined weak symbols in a way that
  75      is incompatible with our code generation.  */
  76   return (GET_CODE (op) != SYMBOL_REF
  77           || (!SYMBOL_REF_WEAK (op)
  78               && !c6x_long_call_p (op)));
  79 })
  80
  81 ;; Returns 1 if OP is a symbolic operand, i.e. a symbol_ref or a label_ref,
  82 ;; possibly with an offset.
  83 (define_predicate "symbolic_operand"
  84   (ior (match_code "symbol_ref,label_ref")
  85        (and (match_code "const")
  86             (match_test "GET_CODE (XEXP (op,0)) == PLUS
  87                          && (GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
  88                              || GET_CODE (XEXP (XEXP (op, 0), 0)) == LABEL_REF)
  89                          && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT"))))
  90
  91 (define_predicate "const_int_or_symbolic_operand"
  92   (ior (match_operand 0 "symbolic_operand")
  93        (match_operand 0 "const_int_operand")))
  94
  95 ;; Return nonzero iff OP is one of the integer constants 2, 4 or 8.
  96 (define_predicate "adda_scale_operand"
  97   (and (match_code "const_int")
  98        (match_test "INTVAL (op) == 2 || INTVAL (op) == 4
  99                     || ((TARGET_INSNS_64 || TARGET_INSNS_67)
 100                         && INTVAL (op) == 8)")))
 101
 102 ;; Return nonzero iff OP is one of the integer constants 2 or 4.
 103 (define_predicate "suba_scale_operand"
 104   (and (match_code "const_int")
 105        (match_test "INTVAL (op) == 2 || INTVAL (op) == 4")))
 106
 107 ;; True if this operator is valid for predication.
 108 (define_predicate "predicate_operator"
 109   (match_code "eq,ne"))
 110
 111 (define_predicate "c6x_comparison_operator"
 112   (match_code "eq,ltu,gtu,lt,gt"))
 113
 114 (define_predicate "non_c6x_comparison_operator"
 115   (match_code "ne,leu,geu,le,ge"))
 116
 117 ;; FP Comparisons handled by c6x_expand_compare.
 118 (define_predicate "c6x_fp_comparison_operator"
 119   (ior (match_code "eq,lt,gt,le,ge")
 120        (and (match_test "TARGET_FP")
 121             (match_code "ltgt,uneq,unlt,ungt,unle,unge,ordered,unordered"))))
 122
 123 (define_predicate "c6x_any_comparison_operand"
 124   (match_code "eq,lt,gt,le,ge,ltu,gtu")
 125 {
 126   rtx op0 = XEXP (op, 0);
 127   rtx op1 = XEXP (op, 1);
 128   if (ltugtu_operator (op, SImode)
 129       && register_operand (op0, SImode)
 130       && ((TARGET_INSNS_64 && reg_or_ucst5_operand (op1, SImode))
 131           || (!TARGET_INSNS_64 && reg_or_ucst4_operand (op1, SImode))))
 132     return true;
 133   if (eqltgt_operator (op, SImode)
 134       && register_operand (op0, SImode)
 135       && reg_or_scst5_operand (op1, SImode))
 136     return true;
 137   if (!TARGET_FP)
 138     return false;
 139   if (!eqltgt_operator (op, SFmode) && !eqltgt_operator (op, DFmode))
 140     return false;
 141   if (register_operand (op0, GET_MODE (op))
 142       && register_operand (op1, GET_MODE (op)))
 143     return true;
 144   return false;
 145 })
 146
 147 (define_predicate "ltugtu_operator"
 148   (match_code "ltu,gtu"))
 149
 150 (define_predicate "eqltgt_operator"
 151   (match_code "eq,lt,gt"))
 152
 153 (define_predicate "eqne_operator"
 154   (match_code "eq,ne"))
 155
 156 (define_predicate "predicate_register"
 157   (and (match_code "reg")
 158        (ior (match_test "REGNO_REG_CLASS (REGNO (op)) == PREDICATE_A_REGS")
 159             (match_test "REGNO_REG_CLASS (REGNO (op)) == PREDICATE_B_REGS"))))
 160
 161 ;; Allow const_ints for things like the real_mult patterns.
 162 (define_predicate "a_register"
 163   (ior (and (match_code "reg")
 164             (match_test "A_REGNO_P (REGNO (op))"))
 165        (and (match_code "const_int")
 166             (match_test "A_REGNO_P (INTVAL (op))"))))
 167
 168 (define_predicate "b_register"
 169   (ior (and (match_code "reg")
 170             (match_test "B_REGNO_P (REGNO (op))"))
 171        (and (match_code "const_int")
 172             (match_test "B_REGNO_P (INTVAL (op))"))))
 173
 174 (define_predicate "pic_register_operand"
 175   (and (match_code "reg")
 176        (match_test "op == pic_offset_table_rtx")))
 177
 178 ;; True if OP refers to a symbol in the sdata section.
 179 (define_predicate "sdata_symbolic_operand"
 180   (match_code "symbol_ref,const")
 181 {
 182   HOST_WIDE_INT offset = 0, size = 0;
 183   tree t;
 184
 185   switch (GET_CODE (op))
 186     {
 187     case CONST:
 188       op = XEXP (op, 0);
 189       if (GET_CODE (op) != PLUS
 190           || GET_CODE (XEXP (op, 0)) != SYMBOL_REF
 191           || GET_CODE (XEXP (op, 1)) != CONST_INT)
 192         return false;
 193       offset = INTVAL (XEXP (op, 1));
 194       op = XEXP (op, 0);
 195       /* FALLTHRU */
 196
 197     case SYMBOL_REF:
 198       /* For shared libraries, only allow symbols we know are local.
 199          For executables, the linker knows to create copy relocs if
 200          necessary so we can use DP-relative addressing for all small
 201          objects.  */
 202       if ((c6x_initial_flag_pic && !SYMBOL_REF_LOCAL_P (op))
 203           || !SYMBOL_REF_SMALL_P (op))
 204         return false;
 205
 206      /* Note that in addition to DECLs, we can get various forms
 207         of constants here.  */
 208       t = SYMBOL_REF_DECL (op);
 209       if (DECL_P (t))
 210         t = DECL_SIZE_UNIT (t);
 211       else
 212         t = TYPE_SIZE_UNIT (TREE_TYPE (t));
 213       if (t && tree_fits_shwi_p (t))
 214         {
 215           size = tree_to_shwi (t);
 216           if (size < 0)
 217             size = 0;
 218         }
 219
 220       /* Don't allow addressing outside the object.  */
 221       return (offset >= 0 && offset <= size);
 222
 223     default:
 224       gcc_unreachable ();
 225     }
 226 })