;; Constraint definitions for Xilinx MicroBlaze processors. ;; Copyright (C) 2010-2021 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))”)))

(define_memory_constraint “Q” “Memory operand which is a single register.” (and (match_code “mem”) (match_test “GET_CODE ( XEXP (op, 0)) == REG”)))