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;; Constraint definitions for ATMEL AVR micro controllers.

;; Copyright (C) 2006, 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

;; .

;; Register constraints

(define_register_constraint "t" "R0_REG"

  "Temporary register r0")

(define_register_constraint "b" "BASE_POINTER_REGS"

  "Base pointer registers (r28--r31)")

(define_register_constraint "e" "POINTER_REGS"

  "Pointer registers (r26--r31)")

(define_register_constraint "w" "ADDW_REGS"

  "Registers from r24 to r31.  These registers

   can be used in @samp{adiw} command.")

(define_register_constraint "d" "LD_REGS"

  "Registers from r16 to r31.")

(define_register_constraint "l" "NO_LD_REGS"

  "Registers from r0 to r15.")

(define_register_constraint "a" "SIMPLE_LD_REGS"

  "Registers from r16 to r23.")

(define_register_constraint "x" "POINTER_X_REGS"

  "Register pair X (r27:r26).")

(define_register_constraint "y" "POINTER_Y_REGS"

  "Register pair Y (r29:r28).")

(define_register_constraint "z" "POINTER_Z_REGS"

  "Register pair Z (r31:r30).")

(define_register_constraint "q" "STACK_REG"

  "Stack pointer register (SPH:SPL).")

(define_constraint "I"

  "Integer constant in the range 0 @dots{} 63."

  (and (match_code "const_int")

       (match_test "ival >= 0 && ival <= 63")))

(define_constraint "J"

  "Integer constant in the range -63 @dots{} 0."

  (and (match_code "const_int")

       (match_test "ival <= 0 && ival >= -63")))

(define_constraint "K"

  "Integer constant 2."

  (and (match_code "const_int")

       (match_test "ival == 2")))

(define_constraint "L"

  "Zero."

  (and (match_code "const_int")

       (match_test "ival == 0")))

(define_constraint "M"

  "Integer constant in the range 0 @dots{} 0xff."

  (and (match_code "const_int")

       (match_test "ival >= 0 && ival <= 0xff")))

(define_constraint "N"

  "Constant integer @minus{}1."

  (and (match_code "const_int")

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

(define_constraint "O"

  "Constant integer 8, 16, or 24."

  (and (match_code "const_int")

       (match_test "ival == 8 || ival == 16 || ival == 24")))

(define_constraint "P"

  "Constant integer 1."

  (and (match_code "const_int")

       (match_test "ival == 1")))

(define_constraint "G"

  "Constant float 0."

  (and (match_code "const_double")

       (match_test "op == CONST0_RTX (SFmode)")))

(define_memory_constraint "Q"

  "A memory address based on Y or Z pointer with displacement."

  (and (match_code "mem")

       (match_test "extra_constraint_Q (op)")))

(define_constraint "Cm2"

  "Constant integer @minus{}2."

  (and (match_code "const_int")

       (match_test "ival == -2")))

(define_constraint "C03"

  "Constant integer 3."

  (and (match_code "const_int")

       (match_test "ival == 3")))

(define_constraint "C04"

  "Constant integer 4."

  (and (match_code "const_int")

       (match_test "ival == 4")))

(define_constraint "C05"

  "Constant integer 5."

  (and (match_code "const_int")

       (match_test "ival == 5")))

(define_constraint "C06"

  "Constant integer 6."

  (and (match_code "const_int")

       (match_test "ival == 6")))

(define_constraint "C07"

  "Constant integer 7."

  (and (match_code "const_int")

       (match_test "ival == 7")))

(define_constraint "Ca2"

  "Constant 2-byte integer that allows AND without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 2, (1<<0) | (1<<7) | (1<<8))")))

(define_constraint "Ca3"

  "Constant 3-byte integer that allows AND without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 3, (1<<0) | (1<<7) | (1<<8))")))

(define_constraint "Ca4"

  "Constant 4-byte integer that allows AND without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 4, (1<<0) | (1<<7) | (1<<8))")))

(define_constraint "Co2"

  "Constant 2-byte integer that allows OR without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 2, (1<<0) | (1<<1) | (1<<8))")))

(define_constraint "Co3"

  "Constant 3-byte integer that allows OR without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 3, (1<<0) | (1<<1) | (1<<8))")))

(define_constraint "Co4"

  "Constant 4-byte integer that allows OR without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 4, (1<<0) | (1<<1) | (1<<8))")))

(define_constraint "Cx2"

  "Constant 2-byte integer that allows XOR without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 2, (1<<0) | (1<<8))")))

(define_constraint "Cx3"

  "Constant 3-byte integer that allows XOR without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 3, (1<<0) | (1<<8))")))

(define_constraint "Cx4"

  "Constant 4-byte integer that allows XOR without clobber register."

  (and (match_code "const_int")

       (match_test "avr_popcount_each_byte (op, 4, (1<<0) | (1<<8))")))

(define_constraint "Csp"

  "Integer constant in the range -6 @dots{} 6."

  (and (match_code "const_int")

       (match_test "IN_RANGE (ival, -6, 6)")))

(define_constraint "Cxf"

  "32-bit integer constant where at least one nibble is 0xf."

  (and (match_code "const_int")

       (match_test "avr_has_nibble_0xf (op)")))

(define_constraint "C0f"

  "32-bit integer constant where no nibble equals 0xf."

  (and (match_code "const_int")

       (match_test "!avr_has_nibble_0xf (op)")))