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;; Constraint definitions for DEC Alpha.
;; Copyright (C) 2007-2020 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)")))
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