1;; Constraint definitions for Xilinx MicroBlaze processors. 2;; Copyright (C) 2010-2020 Free Software Foundation, Inc. 3 4;; Contributed by Michael Eager <eager@eagercon.com>. 5 6;; This file is part of GCC. 7 8;; GCC is free software; you can redistribute it and/or modify 9;; it under the terms of the GNU General Public License as published by 10;; the Free Software Foundation; either version 3, or (at your option) 11;; any later version. 12 13;; GCC is distributed in the hope that it will be useful, 14;; but WITHOUT ANY WARRANTY; without even the implied warranty of 15;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16;; GNU General Public License for more details. 17 18;; You should have received a copy of the GNU General Public License 19;; along with GCC; see the file COPYING3. If not see 20;; <http://www.gnu.org/licenses/>. 21 22(define_register_constraint "d" "GR_REGS" 23 "A general register.") 24 25(define_register_constraint "z" "ST_REGS" 26 "A status register.") 27 28;; Define integer constraints 29 30(define_constraint "I" 31 "A signed 16-bit constant." 32 (and (match_code "const_int") 33 (match_test "SMALL_OPERAND (ival)"))) 34 35(define_constraint "J" 36 "Integer zero." 37 (and (match_code "const_int") 38 (match_test "ival == 0"))) 39 40(define_constraint "M" 41 "A constant which needs two instructions to load." 42 (and (match_code "const_int") 43 (match_test "LARGE_OPERAND (ival)"))) 44 45(define_constraint "N" 46 "A constant in the range -65535 to -1 (inclusive)." 47 (and (match_code "const_int") 48 (match_test "(unsigned HOST_WIDE_INT) (ival + 0xffff) < 0xffff"))) 49 50(define_constraint "P" 51 "A constant in the range 1 to 65535 (inclusive)." 52 (and (match_code "const_int") 53 (match_test "ival > 0 && ival < 0x10000"))) 54 55;; Define floating point constraints 56 57(define_constraint "G" 58 "Floating-point zero." 59 (and (match_code "const_double") 60 (match_test "op == CONST0_RTX (mode)"))) 61 62;; Define memory constraints 63 64(define_memory_constraint "R" 65 "Memory operand which fits in single instruction." 66 (and (match_code "mem") 67 (match_test "simple_memory_operand (op, GET_MODE (op))"))) 68 69(define_memory_constraint "T" 70 "Double word operand." 71 (and (match_code "mem") 72 (match_test "double_memory_operand (op, GET_MODE (op))"))) 73 74(define_memory_constraint "Q" 75 "Memory operand which is a single register." 76 (and (match_code "mem") 77 (match_test "GET_CODE ( XEXP (op, 0)) == REG"))) 78