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;; Constraint definitions for DEC Alpha.

;; Copyright (C) 2007 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

;; .

;;; Unused letters:

;;;    ABCDEF               V  YZ

;;;       de ghijklmnopq stu 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" "FLOAT_REGS"

 "Any floating-point register")

(define_register_constraint "v" "R0_REG"

 "General register 0, function value return address")

;; 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 "ival == 1 || ival == 2 || ival == 3")))

(define_constraint "H"

  "A valid operand of a ZAP insn, when building with 32-bit HOST_WIDE_INT"

  (and (match_code "const_double")

       (match_test "mode == VOIDmode && zap_mask (hval) && zap_mask (lval)")))

;; Floating-point constant constraints.

(define_constraint "G"

  "The floating point zero constant"

  (and (match_code "const_double")

       (match_test "GET_MODE_CLASS (mode) == MODE_FLOAT

                    && op == CONST0_RTX (mode)")))

;; "Extra" constraints.

(define_constraint "Q"

  "@internal A normal_memory_operand"

  (match_operand 0 "normal_memory_operand"))

(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 "U"

  "@internal A UNICOSMK symbol"

  (and (match_test "TARGET_ABI_UNICOSMK")

       (match_operand 0 "symbolic_operand")))

(define_constraint "W"

  "A vector zero constant"

  (and (match_code "const_vector")

       (match_test "op == CONST0_RTX (mode)")))