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[/] [amber/] [trunk/] [hw/] [tests/] [and.S] - Rev 88
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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"
#include "amber_macros.h"
.section .text
.globl main
main:
// sets all four flags
// Cant use p version of instrustion in 32-bit CPU because it writes the upper 4 bits of PC
teqp pc, #0xf0000000
//
// Check that they are set
bvc testfail // V flag
bpl testfail // N flag
bne testfail // Z flag
bcc testfail // C flag
mov r1, #0x0000005a
// should not unset the V flag value
// the carry flag is set to the shifter carry out
ands r2, r1, #0x00000055
// Check the V flag is still set, the Z flag is clear, the C flag
// is unchanged, and the N flag gets cleared
bvc testfail
beq testfail
bcc testfail
bmi testfail
tst r2, #0x00000050
beq testfail
b testpass
testfail:
ldr r11, AdrTestStatus
str r10, [r11]
b testfail
testpass:
ldr r11, AdrTestStatus
mov r10, #17
str r10, [r11]
b testpass
AdrTestStatus: .word ADR_AMBER_TEST_STATUS
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