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/*===========================================================================*/
/* Copyright (C) 2001 Authors                                                */
/*                                                                           */
/* This source file may be used and distributed without restriction provided */
/* that this copyright statement is not removed from the file and that any   */
/* derivative work contains the original copyright notice and the associated */
/* disclaimer.                                                               */
/*                                                                           */
/* This source file is free software; you can redistribute it and/or modify  */
/* it under the terms of the GNU Lesser General Public License as published  */
/* by the Free Software Foundation; either version 2.1 of the License, or    */
/* (at your option) any later version.                                       */
/*                                                                           */
/* This source 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 Lesser General Public       */
/* License for more details.                                                 */
/*                                                                           */
/* You should have received a copy of the GNU Lesser General Public License  */
/* along with this source; if not, write to the Free Software Foundation,    */
/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA        */
/*                                                                           */
/*===========================================================================*/
/*                 TWO-OPERAND ARITHMETIC: XOR[.B] INSTRUCTION               */
/*---------------------------------------------------------------------------*/
/* Test the XOR[.B] instruction.                                             */
/*                                                                           */
/* Author(s):                                                                */
/*             - Olivier Girard,    olgirard@gmail.com                       */
/*                                                                           */
/*---------------------------------------------------------------------------*/
/* $Rev: 17 $                                                                */
/* $LastChangedBy: olivier.girard $                                          */
/* $LastChangedDate: 2009-08-04 23:15:39 +0200 (Tue, 04 Aug 2009) $          */
/*===========================================================================*/


.global main

main:
        /* -------------- TEST INSTRUCTION IN WORD MODE ------------------- */

        mov     #0x0000, r2
        mov     #0x3333, r4
        mov     #0x8888, r5
        xor          r4, r5        ;# XOR r5^r4 (0x8888^0x3333=0xbbbb)

        mov     #0x0001, r2
        mov     #0x5555, r4
        mov     #0x9999, r6
        xor          r4, r6        ;# XOR r6^r4 (0x9999^0x5555=0xcccc)

        mov     #0x1000, r15


        /* -------------- TEST INSTRUCTION IN BYTE MODE ------------------- */

        mov     #0x0000, r2
        mov     #0x3333, r4
        mov     #0x8888, r5
        xor.b        r4, r5        ;# XOR r5^r4 (0x0088^0x0033=0x00bb)

        mov     #0x0001, r2
        mov     #0x5555, r4
        mov     #0x9999, r6
        xor.b        r4, r6        ;# XOR r6^r4 (0x0099^0x0055=0x00cc)

        mov     #0x2000, r15


        /* ------------------ TEST FLAGS IN WORD MODE ---------------------- */

        mov     #0x0000, r2        ;# V=0, N=0, Z=0, C=1
        mov     #0x0aaa, r4        ;#
        mov     #0x0666, r5        ;#
        xor          r4, r5        ;# XOR r5^r4 (0x0666^0x0aaa=0x0ccc)
        mov     #0x3000, r15

        mov     #0x0000, r2        ;# V=0, N=0, Z=1, C=0
        mov     #0x0444, r4        ;#
        mov     #0x0444, r5        ;#
        xor          r4, r5        ;# XOR r5^r4 (0x0444^0x0444=0x0000)
        mov     #0x3001, r15

        mov     #0x0000, r2        ;# V=0, N=1, Z=0, C=1
        mov     #0x8aaa, r4        ;#
        mov     #0x0666, r5        ;#
        xor          r4, r5        ;# XOR r5^r4 (0x8aaa^0x0666=0x8ccc)
        mov     #0x3002, r15

        mov     #0x0000, r2        ;# V=1, N=0, Z=0, C=1
        mov     #0x8aaa, r4        ;#
        mov     #0x8666, r5        ;#
        xor          r4, r5        ;# XOR r5^r4 (0x8aaa^0x8666=0x0ccc)
        mov     #0x3003, r15

        mov     #0x0000, r2        ;# V=1, N=0, Z=1, C=0
        mov     #0x8444, r4        ;#
        mov     #0x8444, r5        ;#
        xor          r4, r5        ;# XOR r5^r4 (0x8444^0x8444=0x0000)
        mov     #0x3004, r15


        /* ------------------ TEST FLAGS IN BYTE MODE --------------------- */

        mov     #0x0000, r2        ;# V=0, N=0, Z=0, C=1
        mov     #0x660a, r4        ;#
        mov     #0xaa06, r5        ;#
        xor.b        r4, r5        ;# XOR r5^r4 (0x0006^0x000a=0x000c)
        mov     #0x4000, r15

        mov     #0x0000, r2        ;# V=0, N=0, Z=1, C=0
        mov     #0x6604, r4        ;#
        mov     #0xaa04, r5        ;#
        xor.b        r4, r5        ;# XOR r5^r4 (0x0004^0x0004=0x0000)
        mov     #0x4001, r15

        mov     #0x0000, r2        ;# V=0, N=1, Z=0, C=1
        mov     #0x558a, r4        ;#
        mov     #0x0006, r5        ;#
        xor.b        r4, r5        ;# XOR r5^r4 (0x008a^0x0006=0x008c)
        mov     #0x4002, r15

        mov     #0x0000, r2        ;# V=1, N=0, Z=0, C=1
        mov     #0x558a, r4        ;#
        mov     #0x5586, r5        ;#
        xor.b        r4, r5        ;# XOR r5^r4 (0x008a^0x0086=0x000c)
        mov     #0x4003, r15

        mov     #0x0000, r2        ;# V=1, N=0, Z=1, C=0
        mov     #0x6684, r4        ;#
        mov     #0xaa84, r5        ;#
        xor.b        r4, r5        ;# XOR r5^r4 (0x0084^0x0084=0x0000)
        mov     #0x4004, r15


        /* ----------------------         END OF TEST        --------------- */
        mov      #0x5000, r15
end_of_test:
        nop
        br #0xffff


        /* ----------------------         INTERRUPT VECTORS  --------------- */

.section .vectors, "a"
.word end_of_test  ; Interrupt  0 (lowest priority)    <unused>
.word end_of_test  ; Interrupt  1                      <unused>
.word end_of_test  ; Interrupt  2                      <unused>
.word end_of_test  ; Interrupt  3                      <unused>
.word end_of_test  ; Interrupt  4                      <unused>
.word end_of_test  ; Interrupt  5                      <unused>
.word end_of_test  ; Interrupt  6                      <unused>
.word end_of_test  ; Interrupt  7                      <unused>
.word end_of_test  ; Interrupt  8                      <unused>
.word end_of_test  ; Interrupt  9                      <unused>
.word end_of_test  ; Interrupt 10                      Watchdog timer
.word end_of_test  ; Interrupt 11                      <unused>
.word end_of_test  ; Interrupt 12                      <unused>
.word end_of_test  ; Interrupt 13                      <unused>
.word end_of_test  ; Interrupt 14                      NMI
.word main         ; Interrupt 15 (highest priority)   RESET