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jeremybenn |
;; Constraint definitions for Xilinx MicroBlaze processors.
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;; Copyright 2010 Free Software Foundation, Inc.
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;; Contributed by Michael Eager .
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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
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GCC is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public 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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(define_register_constraint "d" "GR_REGS"
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"A general register.")
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(define_register_constraint "z" "ST_REGS"
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"A status register.")
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;; Define integer constraints
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(define_constraint "I"
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"A signed 16-bit constant."
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(and (match_code "const_int")
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(match_test "SMALL_OPERAND (ival)")))
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(define_constraint "J"
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"Integer zero."
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(and (match_code "const_int")
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(match_test "ival == 0")))
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(define_constraint "M"
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"A constant which needs two instructions to load."
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(and (match_code "const_int")
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(match_test "LARGE_OPERAND (ival)")))
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(define_constraint "N"
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"A constant in the range -65535 to -1 (inclusive)."
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(and (match_code "const_int")
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(match_test "(unsigned HOST_WIDE_INT) (ival + 0xffff) < 0xffff")))
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(define_constraint "P"
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"A constant in the range 1 to 65535 (inclusive)."
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(and (match_code "const_int")
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(match_test "ival > 0 && ival < 0x10000")))
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;; Define floating point constraints
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(define_constraint "G"
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"Floating-point zero."
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(and (match_code "const_double")
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(match_test "op == CONST0_RTX (mode)")))
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;; Define memory constraints
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(define_memory_constraint "R"
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"Memory operand which fits in single instruction."
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(and (match_code "mem")
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(match_test "simple_memory_operand (op, GET_MODE (op))")))
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(define_memory_constraint "T"
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"Double word operand."
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(and (match_code "mem")
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(match_test "double_memory_operand (op, GET_MODE (op))")))
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