gcc/config/alpha/constraints.md

   1 ;; Constraint definitions for DEC Alpha.
   2 ;; Copyright (C) 2007-2018 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 ;;; Unused letters:
  21 ;;;    ABCDEF H             V  YZ
  22 ;;;       de ghijkl   pq  tu wxyz
  23
  24 ;; Integer register constraints.
  25
  26 (define_register_constraint "a" "R24_REG"
  27  "General register 24, input to division routine")
  28
  29 (define_register_constraint "b" "R25_REG"
  30  "General register 24, input to division routine")
  31
  32 (define_register_constraint "c" "R27_REG"
  33  "General register 27, function call address")
  34
  35 (define_register_constraint "f" "TARGET_FPREGS ? FLOAT_REGS : NO_REGS"
  36  "Any floating-point register")
  37
  38 (define_register_constraint "v" "R0_REG"
  39  "General register 0, function value return address")
  40
  41 (define_memory_constraint "w"
  42  "A memory whose address is only a register"
  43  (match_operand 0 "mem_noofs_operand"))
  44
  45 ;; Integer constant constraints.
  46 (define_constraint "I"
  47   "An unsigned 8 bit constant"
  48   (and (match_code "const_int")
  49        (match_test "IN_RANGE (ival, 0, 255)")))
  50
  51 (define_constraint "J"
  52   "The constant zero"
  53   (and (match_code "const_int")
  54        (match_test "ival == 0")))
  55
  56 (define_constraint "K"
  57   "Signed 16-bit integer constant"
  58   (and (match_code "const_int")
  59        (match_test "IN_RANGE (ival, -32768, 32767)")))
  60
  61 (define_constraint "L"
  62   "A shifted signed 16-bit constant appropriate for LDAH"
  63   (and (match_code "const_int")
  64        (match_test "(ival & 0xffff) == 0
  65                     && (ival >> 31 == -1 || ival >> 31 == 0)")))
  66
  67 (define_constraint "M"
  68   "A valid operand of a ZAP insn"
  69   (and (match_code "const_int")
  70        (match_test "zap_mask (ival) != 0")))
  71
  72 (define_constraint "N"
  73   "A complemented unsigned 8-bit constant"
  74   (and (match_code "const_int")
  75        (match_test "IN_RANGE (~ival, 0, 255)")))
  76
  77 (define_constraint "O"
  78   "A negated unsigned 8-bit constant"
  79   (and (match_code "const_int")
  80        (match_test "IN_RANGE (-ival, 0, 255)")))
  81
  82 (define_constraint "P"
  83   "The constant 1, 2 or 3"
  84   (and (match_code "const_int")
  85        (match_test "ival == 1 || ival == 2 || ival == 3")))
  86
  87 ;; Floating-point constant constraints.
  88 (define_constraint "G"
  89   "The floating point zero constant"
  90   (and (match_code "const_double")
  91        (match_test "op == CONST0_RTX (mode)")))
  92
  93 ;; "Extra" constraints.
  94
  95 ;; A memory location that is not a reference
  96 ;; (using an AND) to an unaligned location.
  97 (define_memory_constraint "Q"
  98   "@internal A normal_memory_operand"
  99   (and (match_code "mem")
 100        (not (match_code "and" "0"))))
 101
 102 (define_constraint "R"
 103   "@internal A direct_call_operand"
 104   (match_operand:DI 0 "direct_call_operand"))
 105
 106 (define_constraint "S"
 107   "An unsigned 6-bit constant"
 108   (and (match_code "const_int")
 109        (match_test "IN_RANGE (ival, 0, 63)")))
 110
 111 (define_constraint "T"
 112   "@internal A high-part symbol"
 113   (match_code "high"))
 114
 115 (define_constraint "W"
 116   "A vector zero constant"
 117   (and (match_code "const_vector")
 118        (match_test "op == CONST0_RTX (mode)")))