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[/] [amber/] [trunk/] [hw/] [tests/] [sub.S] - Blame information for rev 11

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1 2 csantifort
/*****************************************************************
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//                                                              //
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//  Amber 2 Core Instruction Test                               //
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//                                                              //
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//  This file is part of the Amber project                      //
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//  http://www.opencores.org/project,amber                      //
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//                                                              //
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//  Description                                                 //
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//  Tests sub and subs                                          //
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//                                                              //
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//  Author(s):                                                  //
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//      - Conor Santifort, csantifort.amber@gmail.com           //
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//                                                              //
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/*****************************************************************
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//                                                              //
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//  Amber 2 Core Instruction Test                               //
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//                                                              //
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//  This file is part of the Amber project                      //
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//  http://www.opencores.org/project,amber                      //
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//                                                              //
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//  Description                                                 //
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//  Tests sub and subs instructions                             //
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//                                                              //
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//  Author(s):                                                  //
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//      - Conor Santifort, csantifort.amber@gmail.com           //
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//                                                              //
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//////////////////////////////////////////////////////////////////
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//                                                              //
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// Copyright (C) 2010 Authors and OPENCORES.ORG                 //
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//                                                              //
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// This source file may be used and distributed without         //
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// restriction provided that this copyright statement is not    //
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// removed from the file and that any derivative work contains  //
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// the original copyright notice and the associated disclaimer. //
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//                                                              //
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// This source file is free software; you can redistribute it   //
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// and/or modify it under the terms of the GNU Lesser General   //
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// Public License as published by the Free Software Foundation; //
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// either version 2.1 of the License, or (at your option) any   //
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// later version.                                               //
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//                                                              //
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// This source is distributed in the hope that it will be       //
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// useful, but WITHOUT ANY WARRANTY; without even the implied   //
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// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      //
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// PURPOSE.  See the GNU Lesser General Public License for more //
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// details.                                                     //
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//                                                              //
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// You should have received a copy of the GNU Lesser General    //
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// Public License along with this source; if not, download it   //
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// from http://www.opencores.org/lgpl.shtml                     //
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//                                                              //
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*****************************************************************/
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#include "amber_registers.h"
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        .section .text
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        .globl  main
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main:
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        ldr     r0, =Data1
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        ldr     r6, Data2
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        ldr     lr, =1f
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        mov     pc, lr
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        @ Test subs
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1:      ldr     r3, [r0]
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        subs    r2,  r3,  #1
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        cmpcs   r2,  r6
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        movcs   r3,  #0
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        cmp     r3,  #0
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        movne   r10, #10
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        bne     testfail
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        @ Test sub
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/* 1 - 0x7fffffff */
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        ldr     r1, MaxPos
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        mov     r2, #1
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        sub     r3, r2, r1
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        ldr     r4, MaxNeg
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        add     r4, r4, #2
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        cmp     r4, r3
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        movne   r10, #20
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        bne     testfail
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        b       testpass
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testfail:
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        ldr     r11, AdrTestStatus
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        str     r10, [r11]
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        b       testfail
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testpass:
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        ldr     r11, AdrTestStatus
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        mov     r10, #17
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        str     r10, [r11]
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        b       testpass
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/* Write 17 to this address to generate a Test Passed message */
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AdrTestStatus:  .word  ADR_AMBER_TEST_STATUS
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MaxPos:         .word  0x7fffffff
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MaxNeg:         .word  0x80000000
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Data1:          .word  0x03000000
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Data2:          .word  0x020febed
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/* ========================================================================= */
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/* ========================================================================= */
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