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;; Constraint definitions for XSTORMY16.

;; Copyright (C) 2011 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

;; .

;; Register constraints.

(define_register_constraint "a" "R0_REGS"

  "@internal")

(define_register_constraint "b" "R1_REGS"

  "@internal")

(define_register_constraint "c" "R2_REGS"

  "@internal")

(define_register_constraint "d" "R8_REGS"

  "@internal")

(define_register_constraint "e" "EIGHT_REGS"

  "@internal")

(define_register_constraint "t" "TWO_REGS"

  "@internal")

(define_register_constraint "z" "ICALL_REGS"

  "@internal")

;; Integer constraints.

(define_constraint "I"

  "An integer between 0 and 3."

  (and (match_code "const_int")

       (match_test "IN_RANGE (ival, 0, 3)")))

(define_constraint "J"

  "A power of two."

  (and (match_code "const_int")

       (match_test "exact_log2 (ival) != -1")))

(define_constraint "K"

  "A power of two when inverted."

  (and (match_code "const_int")

       (match_test "exact_log2 (~ival) != -1")))

(define_constraint "L"

  "An 8-bit unsigned integer."

  (and (match_code "const_int")

       (match_test "IN_RANGE (ival, 0, 255)")))

(define_constraint "M"

  "An integer between -255 and 0."

  (and (match_code "const_int")

       (match_test "IN_RANGE (ival, -255, 0)")))

(define_constraint "N"

  "An integer between -3 and 0."

  (and (match_code "const_int")

       (match_test "IN_RANGE (ival, -3, 0)")))

(define_constraint "O"

  "An integer between 1 and 4."

  (and (match_code "const_int")

       (match_test "IN_RANGE (ival, 1, 4)")))

(define_constraint "P"

  "An integer between -4 and -1."

  (and (match_code "const_int")

       (match_test "IN_RANGE (ival, -4, -1)")))

;; Extra constraints.

(define_constraint "Q"

  "A register push operation."

  (and (match_code "mem")

       (match_code "post_inc" "0")

       (match_test "XEXP (XEXP (op, 0), 0) == stack_pointer_rtx")))

(define_constraint "R"

  "A register pop operation."

  (and (match_code "mem")

       (match_code "pre_dec" "0")

       (match_test "XEXP (XEXP (op, 0), 0) == stack_pointer_rtx")))

(define_constraint "S"

  "An immediate memory address."

  (and (match_code "mem")

       (match_code "const_int" "0")

       (match_test "xstormy16_legitimate_address_p (VOIDmode, XEXP (op, 0), false)")))

(define_constraint "T"

  "@internal"

  ;; For Rx; not implemented yet.

  (match_test "0"))

(define_constraint "U"

  "An integer not between 2 and 15."

  (and (match_code "const_int")

       (match_test "!IN_RANGE (ival, 2, 15)")))

(define_constraint "W"

  "@internal"

  (match_operand 0 "xstormy16_below100_operand"))

(define_constraint "Z"

  "Zero."

  (and (match_code "const_int")

       (match_test "ival == 0")))