gcc/config/ft32/constraints.md

   1 ;; Constraint definitions for FT32
   2 ;; Copyright (C) 2015 Free Software Foundation, Inc.
   3 ;; Contributed by FTDI <support@ftdi.com>
   4
   5 ;; This file is part of GCC.
   6
   7 ;; GCC is free software; you can redistribute it and/or modify it
   8 ;; under the terms of the GNU General Public License as published
   9 ;; by the Free Software Foundation; either version 3, or (at your
  10 ;; option) any later version.
  11
  12 ;; GCC is distributed in the hope that it will be useful, but WITHOUT
  13 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14 ;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15 ;; License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GCC; see the file COPYING3.  If not see
  19 ;; <http://www.gnu.org/licenses/>.
  20
  21 ;; -------------------------------------------------------------------------
  22 ;; Constraints
  23 ;; -------------------------------------------------------------------------
  24
  25 (define_memory_constraint "A"
  26   "An absolute address."
  27   (and (match_code "mem")
  28        (match_test "(!ft32_is_mem_pm(op))")
  29        (ior (match_test "GET_CODE (XEXP (op, 0)) == SYMBOL_REF")
  30             (match_test "GET_CODE (XEXP (op, 0)) == LABEL_REF")
  31             (match_test "GET_CODE (XEXP (op, 0)) == CONST_INT")
  32             (and (match_test "(GET_CODE (XEXP (op, 0)) == PLUS)")
  33                  (ior (match_test "GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF")
  34                       (match_test "GET_CODE (XEXP (XEXP (op, 0), 0)) == LABEL_REF")
  35                       (match_test "GET_CODE (XEXP (XEXP (op, 0), 0)) == CONST_INT"))
  36                  (ior (match_test "GET_CODE (XEXP (XEXP (op, 0), 1)) == SYMBOL_REF")
  37                       (match_test "GET_CODE (XEXP (XEXP (op, 0), 1)) == LABEL_REF")
  38                       (match_test "GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT"))))))
  39
  40 (define_memory_constraint "B"
  41   "An offset address."
  42   (and (match_code "mem")
  43        (match_test "(!ft32_is_mem_pm(op))")
  44        (match_test "(GET_CODE (XEXP (op, 0)) == PLUS)")))
  45
  46 (define_memory_constraint "W"
  47   "A register indirect memory operand."
  48   (and (match_code "mem")
  49        (match_test "!ft32_is_mem_pm(op)
  50         && REG_P (XEXP (op, 0))
  51                     && REGNO_OK_FOR_BASE_P (REGNO (XEXP (op, 0)))")))
  52
  53 (define_memory_constraint "e"
  54   "An offset address."
  55   (and (match_code "mem")
  56        (match_test "ft32_is_mem_pm(op) && (
  57           (GET_CODE (XEXP (op, 0)) == SYMBOL_REF) ||
  58           (GET_CODE (XEXP (op, 0)) == LABEL_REF) ||
  59           (GET_CODE (XEXP (op, 0)) == CONST_INT) ||
  60           (GET_CODE (XEXP (op, 0)) == CONST))"
  61        )))
  62
  63 (define_memory_constraint "f"
  64   "An offset address."
  65   (and (match_code "mem")
  66        (match_test "ft32_is_mem_pm(op) && (
  67           ((GET_CODE (XEXP (op, 0)) == PLUS)) ||
  68           (GET_CODE (XEXP (op, 0)) == REG))"
  69        )))
  70
  71 (define_constraint "O"
  72   "The constant zero or one"
  73   (and (match_code "const_int")
  74        (match_test "((ival == 0) || (ival == 1))")))
  75
  76 (define_constraint "I"
  77   "A 16-bit signed constant (-32768..32767)"
  78   (and (match_code "const_int")
  79        (match_test "ival >= -32768 && ival <= 32767")))
  80
  81 (define_constraint "w"
  82   "A bitfield mask suitable for bext or bins"
  83   (and (match_code "const_int")
  84        (match_test "ft32_as_bitfield(ival) != -1")))
  85
  86 (define_constraint "x"
  87   "An inverted bitfield mask suitable for bext or bins"
  88   (and (match_code "const_int")
  89        (match_test "ft32_as_bitfield(0xffffffff ^ ival) != -1")))
  90
  91 (define_constraint "L"
  92   "A 16-bit unsigned constant, multiple of 4 (-65532..0)"
  93   (and (match_code "const_int")
  94        (match_test "-65532 <= ival && ival <= 0 && (ival & 3) == 0")))
  95
  96 (define_constraint "S"
  97   "A 20-bit signed constant (-524288..524287)"
  98   (ior
  99     (and (match_code "const_int")
 100          (match_test "ival >= -524288 && ival <= 524287"))
 101     (match_test "GET_CODE (op) == LABEL_REF")
 102     (match_test "GET_CODE (op) == SYMBOL_REF")
 103     (match_test "GET_CODE (op) == CONST")))
 104
 105 (define_constraint "b"
 106   "A constant for a bitfield width (1..16)"
 107   (and (match_code "const_int")
 108        (match_test "1 <= ival && ival <= 16")))
 109
 110 (define_constraint "KA"
 111   "A 10-bit signed constant (-512..511)"
 112   (and (match_code "const_int")
 113        (match_test "-512 <= ival && ival <= 511")))