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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [moxie/] [constraints.md] - Blame information for rev 318

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1 282 jeremybenn
;; Constraint definitions for Moxie
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;; Copyright (C) 2009 Free Software Foundation, Inc.
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;; Contributed by Anthony Green 
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;; This file is part of GCC.
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;; GCC is free software; you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published
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;; by the Free Software Foundation; either version 3, or (at your
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;; option) any later version.
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;; GCC is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
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;; License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GCC; see the file COPYING3.  If not see
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;; .
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;; -------------------------------------------------------------------------
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;; Constraints
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;; -------------------------------------------------------------------------
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(define_constraint "A"
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  "An absolute address."
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  (and (match_code "mem")
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       (ior (match_test "GET_CODE (XEXP (op, 0)) == SYMBOL_REF")
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            (match_test "GET_CODE (XEXP (op, 0)) == LABEL_REF")
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            (match_test "GET_CODE (XEXP (op, 0)) == CONST"))))
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(define_constraint "B"
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  "An offset address."
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  (and (match_code "mem")
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       (match_test "GET_CODE (XEXP (op, 0)) == PLUS")))
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(define_constraint "W"
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  "A register indirect memory operand."
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  (and (match_code "mem")
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       (match_test "REG_P (XEXP (op, 0))
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                    && REGNO_OK_FOR_BASE_P (REGNO (XEXP (op, 0)))")))
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(define_constraint "O"
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  "The constant zero"
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  (and (match_code "const_int")
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       (match_test "ival == 0")))
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(define_constraint "I"
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  "An 8-bit constant (0..255)"
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  (and (match_code "const_int")
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       (match_test "ival >= 0 && ival <= 255")))
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(define_constraint "N"
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  "A constant -(0..255)"
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  (and (match_code "const_int")
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       (match_test "ival >= -255 && ival <= 0")))

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