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[/] [amber/] [trunk/] [hw/] [tests/] [adc.S] - Rev 2
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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 with carry //
// //
// 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"
.section .text
.globl main
main:
ldr r0, Data0
ldr r1, Data1
ldr r2, Data2
ldr r3, Data3
ldr r4, Result0
adcs r8, r0, r1
adc r8, r8, r3
@ check that overflow flag has been set
mov r5, pc
and r5, r5, #0xf0000000 @ clear non-flag bits
cmp r5, #0x90000000 @ negative and overflow flags set
movne r10, #10
bne testfail
@ check the result
cmp r8, r4
movne r10, #20
bne testfail
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
Data0: .word 0x40000000
Data1: .word 0x40000000
Data2: .word 0x10000000
Data3: .word 0x10000000
Result0: .word 0x90000000
/* ========================================================================= */
/* ========================================================================= */
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