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[/] [amber/] [trunk/] [hw/] [tests/] [add.S] - Rev 56
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/*****************************************************************
// //
// Amber 2 Core Instruction Test //
// //
// This file is part of the Amber project //
// http://www.opencores.org/project,amber //
// //
// Description //
// Tests add //
// //
// Author(s): //
// - Conor Santifort, csantifort.amber@gmail.com //
// //
//////////////////////////////////////////////////////////////////
// //
// Copyright (C) 2010 Authors and OPENCORES.ORG //
// //
// 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, download it //
// from http://www.opencores.org/lgpl.shtml //
// //
*****************************************************************/
#include "amber_registers.h"
#include "amber_macros.h"
.section .text
.globl main
main:
/* 3 + 1 */
mov r1, #3
mov r2, #1
add r3, r1, r2
expect r3, 4, __LINE__
/* 0 + 0 */
mov r4, #0
mov r5, #0
add r6, r5, r4
expect r6, 0, __LINE__
/* 0 + -1 */
mov r7, #0
mov r8, #-1
add r9, r7, r8
expect r9, -1, __LINE__
/* -1 + 0 */
mov r1, #-1
mov r2, #0
add r3, r1, r2
expect r3, -1, __LINE__
/* -1 + -1 */
mov r4, #-1
mov r5, #-1
add r6, r4, r5
expect r6, -2, __LINE__
/* -1 + -255 */
mov r7, #-1
mov r8, #-255
add r9, r7, r8
expect r9, -256, __LINE__
/* 1 + 0x7fffffff */
ldr r1, MaxPos
mov r2, #1
adds r3, r1, r2
/* this should generate an overflow */
/* so if the V flag is Clear then fail */
bvc testfail
ldr r0, MaxNeg
compare r0, r3, __LINE__
b testpass
testfail:
ldr r11, AdrTestStatus
str r10, [r11]
b testfail
testpass:
ldr r11, AdrTestStatus
mov r10, #17
str r10, [r11]
b testpass
/* Write 17 to this address to generate a Test Passed message */
AdrTestStatus: .word ADR_AMBER_TEST_STATUS
MaxPos: .word 0x7fffffff
MaxNeg: .word 0x80000000
/* ========================================================================= */
/* ========================================================================= */
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