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;; Constraint definitions for Xilinx MicroBlaze processors.
;; Copyright 2010 Free Software Foundation, Inc.
;; Contributed by Michael Eager <eager@eagercon.com>.
;; This file is part of GCC.
;; GCC is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GCC is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GCC; see the file COPYING3. If not see
;; <http://www.gnu.org/licenses/>.
(define_register_constraint "d" "GR_REGS"
"A general register.")
(define_register_constraint "z" "ST_REGS"
"A status register.")
;; Define integer constraints
(define_constraint "I"
"A signed 16-bit constant."
(and (match_code "const_int")
(match_test "SMALL_OPERAND (ival)")))
(define_constraint "J"
"Integer zero."
(and (match_code "const_int")
(match_test "ival == 0")))
(define_constraint "M"
"A constant which needs two instructions to load."
(and (match_code "const_int")
(match_test "LARGE_OPERAND (ival)")))
(define_constraint "N"
"A constant in the range -65535 to -1 (inclusive)."
(and (match_code "const_int")
(match_test "(unsigned HOST_WIDE_INT) (ival + 0xffff) < 0xffff")))
(define_constraint "P"
"A constant in the range 1 to 65535 (inclusive)."
(and (match_code "const_int")
(match_test "ival > 0 && ival < 0x10000")))
;; Define floating point constraints
(define_constraint "G"
"Floating-point zero."
(and (match_code "const_double")
(match_test "op == CONST0_RTX (mode)")))
;; Define memory constraints
(define_memory_constraint "R"
"Memory operand which fits in single instruction."
(and (match_code "mem")
(match_test "simple_memory_operand (op, GET_MODE (op))")))
(define_memory_constraint "T"
"Double word operand."
(and (match_code "mem")
(match_test "double_memory_operand (op, GET_MODE (op))")))
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