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olivier.gi |
/*===========================================================================*/
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/* Copyright (C) 2001 Authors */
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/* */
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/* This source file may be used and distributed without restriction provided */
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/* that this copyright statement is not removed from the file and that any */
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/* derivative work contains the original copyright notice and the associated */
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/* disclaimer. */
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/* */
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/* This source file is free software; you can redistribute it and/or modify */
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/* it under the terms of the GNU Lesser General Public License as published */
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/* by the Free Software Foundation; either version 2.1 of the License, or */
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/* (at your option) any later version. */
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/* */
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/* This source is distributed in the hope that it will be useful, but WITHOUT*/
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
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/* License for more details. */
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/* */
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/* You should have received a copy of the GNU Lesser General Public License */
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/* along with this source; if not, write to the Free Software Foundation, */
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/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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/* */
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/*===========================================================================*/
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/* TWO-OPERAND ARITHMETIC: CMP[.B] INSTRUCTION */
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/*---------------------------------------------------------------------------*/
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/* Test the CMP[.B] instruction. */
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olivier.gi |
/* */
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/* Author(s): */
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/* - Olivier Girard, olgirard@gmail.com */
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/* */
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/*---------------------------------------------------------------------------*/
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olivier.gi |
/* $Rev: 101 $ */
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/* $LastChangedBy: olivier.girard $ */
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/* $LastChangedDate: 2011-03-04 21:17:50 +0100 (Fri, 04 Mar 2011) $ */
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olivier.gi |
/*===========================================================================*/
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.global main
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main:
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/* -------------- TEST INSTRUCTION IN WORD MODE ------------------- */
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# Test CMP without Carry bit set
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mov #0x0000, r2
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mov #0x3333, r4
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mov #0x8888, r5
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cmp r4, r5 ;# Compare r5-r4 (0x8888-0x3333=0x5555)
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# Test CMP with Carry bit set
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mov #0x0001, r2
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mov #0x5555, r4
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mov #0x9999, r6
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cmp r4, r6 ;# Compare r6-r4 (0x9999-0x5555=0x4444)
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mov #0x1000, r15
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/* -------------- TEST INSTRUCTION IN BYTE MODE ------------------- */
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# Test CMP.B without Carry bit set
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mov #0x0000, r2
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mov #0x3333, r4
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mov #0x8888, r5
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cmp.b r4, r5 ;# Compare r5-r4 (0x0088-0x0033=0x0055)
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# Test CMP.B with Carry bit set
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mov #0x0001, r2
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mov #0x5555, r4
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mov #0x9999, r6
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cmp.b r4, r6 ;# Compare r6-r4 (0x0099-0x0055=0x0044)
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mov #0x2000, r15
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/* ------------------ TEST FLAGS IN WORD MODE ---------------------- */
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mov #0x0000, r2 ;# V=0, N=1, Z=0, C=0
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mov #0x0aaa, r4 ;#
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mov #0x0666, r5 ;#
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cmp r4, r5 ;# Compare r5-r4 (0x0666-0x0aaa=0xfbbc)
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mov #0x3000, r15
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mov #0x0000, r2 ;# V=0, N=0, Z=0, C=1
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mov #0x0444, r4 ;#
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mov #0x0555, r5 ;#
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cmp r4, r5 ;# Compare r5-r4 (0x0555-0x0444=0x0111)
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mov #0x3001, r15
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mov #0x0000, r2 ;# V=0, N=0, Z=1, C=1
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mov #0x0333, r4 ;#
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mov #0x0333, r5 ;#
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cmp r4, r5 ;# Compare r5-r4 (0x0333-0x0333=0x0000)
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mov #0x3002, r15
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mov #0x0000, r2 ;# V=1, N=1, Z=0, C=0
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mov #0x80ff, r4 ;#
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mov #0x7ff0, r5 ;#
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cmp r4, r5 ;# Compare r5-r4 (0x7ff0-0x80ff=0xfef1)
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mov #0x3003, r15
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mov #0x0000, r2 ;# V=1, N=0, Z=0, C=1
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mov #0x7f00, r4 ;#
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mov #0x8000, r5 ;#
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cmp r4, r5 ;# Compare r5-r4 (0x8000-0x7f00=0x0100)
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mov #0x3004, r15
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/* ------------------ TEST FLAGS IN BYTE MODE --------------------- */
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mov #0x0000, r2 ;# V=0, N=1, Z=0, C=0
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mov #0x890a, r4 ;#
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mov #0x5106, r5 ;#
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cmp.b r4, r5 ;# Compare r5-r4 (0x0006-0x000a=0x00fc)
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mov #0x4000, r15
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mov #0x0000, r2 ;# V=0, N=0, Z=0, C=1
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mov #0xfa04, r4 ;#
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mov #0x5305, r5 ;#
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cmp.b r4, r5 ;# Compare r5-r4 (0x0005-0x0004=0x0001)
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mov #0x4001, r15
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mov #0x0000, r2 ;# V=0, N=0, Z=1, C=1
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mov #0xe603, r4 ;#
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mov #0x8a03, r5 ;#
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cmp.b r4, r5 ;# Compare r5-r4 (0x0003-0x0003=0x0000)
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mov #0x4002, r15
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mov #0x0000, r2 ;# V=1, N=1, Z=0, C=0
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mov #0x7387, r4 ;#
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mov #0x817f, r5 ;#
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cmp.b r4, r5 ;# Compare r5-r4 (0x007f-0x0087=0x00f8)
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mov #0x4003, r15
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mov #0x0000, r2 ;# V=1, N=0, Z=0, C=1
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mov #0x8175, r4 ;#
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mov #0x5480, r5 ;#
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cmp.b r4, r5 ;# Compare r5-r4 (0x0080-0x0075=0x000b)
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mov #0x4004, r15
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olivier.gi |
/* mmihai cmp.b bug */
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mov #0x0210, r5
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clr.b 0(r5)
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mov #0x1, r4
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cmp.b r4, 0(r5)
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jz end_of_test ;# should not happen
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mov #0x4100, r15
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olivier.gi |
/* ---------------------- END OF TEST --------------- */
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mov #0x5000, r15
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end_of_test:
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nop
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br #0xffff
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/* ---------------------- INTERRUPT VECTORS --------------- */
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.section .vectors, "a"
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.word end_of_test ; Interrupt 0 (lowest priority)
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.word end_of_test ; Interrupt 1
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.word end_of_test ; Interrupt 2
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.word end_of_test ; Interrupt 3
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.word end_of_test ; Interrupt 4
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.word end_of_test ; Interrupt 5
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.word end_of_test ; Interrupt 6
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.word end_of_test ; Interrupt 7
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.word end_of_test ; Interrupt 8
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.word end_of_test ; Interrupt 9
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.word end_of_test ; Interrupt 10 Watchdog timer
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.word end_of_test ; Interrupt 11
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.word end_of_test ; Interrupt 12
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.word end_of_test ; Interrupt 13
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.word end_of_test ; Interrupt 14 NMI
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.word main ; Interrupt 15 (highest priority) RESET
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