;; Constraint definitions for DEC Alpha. ;; Copyright (C) 2007-2021 Free Software Foundation, Inc. ;; ;; 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/.

;;; Unused letters: ;;; ABCDEF H V YZ ;;; de ghijkl pq tu wxyz

;; Integer register constraints.

(define_register_constraint “a” “R24_REG” “General register 24, input to division routine”)

(define_register_constraint “b” “R25_REG” “General register 24, input to division routine”)

(define_register_constraint “c” “R27_REG” “General register 27, function call address”)

(define_register_constraint “f” “TARGET_FPREGS ? FLOAT_REGS : NO_REGS” “Any floating-point register”)

(define_register_constraint “v” “R0_REG” “General register 0, function value return address”)

(define_memory_constraint “w” “A memory whose address is only a register” (match_operand 0 “mem_noofs_operand”))

;; Integer constant constraints. (define_constraint “I” “An unsigned 8 bit constant” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 0, 255)”)))

(define_constraint “J” “The constant zero” (and (match_code “const_int”) (match_test “ival == 0”)))

(define_constraint “K” “Signed 16-bit integer constant” (and (match_code “const_int”) (match_test “IN_RANGE (ival, -32768, 32767)”)))

(define_constraint “L” “A shifted signed 16-bit constant appropriate for LDAH” (and (match_code “const_int”) (match_test “(ival & 0xffff) == 0 && (ival >> 31 == -1 || ival >> 31 == 0)”)))

(define_constraint “M” “A valid operand of a ZAP insn” (and (match_code “const_int”) (match_test “zap_mask (ival) != 0”)))

(define_constraint “N” “A complemented unsigned 8-bit constant” (and (match_code “const_int”) (match_test “IN_RANGE (~ival, 0, 255)”)))

(define_constraint “O” “A negated unsigned 8-bit constant” (and (match_code “const_int”) (match_test “IN_RANGE (-ival, 0, 255)”)))

(define_constraint “P” “The constant 1, 2 or 3” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 1, 3)”)))

;; Floating-point constant constraints. (define_constraint “G” “The floating point zero constant” (and (match_code “const_double”) (match_test “op == CONST0_RTX (mode)”)))

;; “Extra” constraints.

;; A memory location that is not a reference ;; (using an AND) to an unaligned location. (define_memory_constraint “Q” “@internal A normal_memory_operand” (and (match_code “mem”) (not (match_code “and” “0”))))

(define_constraint “R” “@internal A direct_call_operand” (match_operand:DI 0 “direct_call_operand”))

(define_constraint “S” “An unsigned 6-bit constant” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 0, 63)”)))

(define_constraint “T” “@internal A high-part symbol” (match_code “high”))

(define_constraint “W” “A vector zero constant” (and (match_code “const_vector”) (match_test “op == CONST0_RTX (mode)”)))