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[/] [amber/] [trunk/] [hw/] [tests/] [sbc.S] - Blame information for rev 84

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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 64-bit subtractions using sbc (subtract 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:
 
        mov     r12, #0
 
 
loop:   ldr     r0, AdrData1
        add     r0, r0, r12, lsl #3  @ double-word elements
        ldr     r1, [r0], #4
        ldr     r2, [r0]
 
        ldr     r3, AdrData2
        add     r3, r3, r12, lsl #3  @ double-word elements
        ldr     r4, [r3], #4
        ldr     r5, [r3]
 
        @ {r1, r2} - {r4, r5}
        subs    r6, r2, r5
        sbc     r7, r1, r4
 
        ldr     r0, AdrAnswers
        add     r0, r0, r12, lsl #3  @ double-word elements
        ldr     r1, [r0], #4
        ldr     r2, [r0]
 
        cmp     r1, r7
        movne   r10, #10
        bne     testfail
        cmp     r2, r6
        movne   r10, #20
        bne     testfail
 
        @ increment loop counter
        cmp     r12, #2
        beq     testpass
        add     r12, r12, #1
        b       loop
 
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
AdrData1:       .word  Data1
AdrData2:       .word  Data2
AdrAnswers:     .word  Answers
 
Data1:
@ HiWord, LoWord
.word 0x10000000
.word 0x00000001
.word 0x10000000
.word 0x00000000
.word 0x00000001
.word 0xc8d14800
 
Data2:
@ HiWord, LoWord
.word 0x08000000
.word 0x00000001
.word 0x08000000
.word 0xffffffff
.word 0x00000000
.word 0x3b9aca00
 
Answers:
@ HiWord, LoWord
.word 0x08000000
.word 0x00000000
.word 0x07ffffff
.word 0x00000001
.word 0x00000001
.word 0x8d367e00
 
 
/* ========================================================================= */
/* ========================================================================= */
 
 

Line No.	Rev	Author	Line
1	2	csantifort	`/*****************************************************************`
2			`// //`
3			`// Amber 2 Core Instruction Test //`
4			`// //`
5			`// This file is part of the Amber project //`
6			`// http://www.opencores.org/project,amber //`
7			`// //`
8			`// Description //`
9			`// Tests 64-bit subtractions using sbc (subtract with carry) //`
10			`// //`
11			`// Author(s): //`
12			`// - Conor Santifort, csantifort.amber@gmail.com //`
13			`// //`
14			`//////////////////////////////////////////////////////////////////`
15			`// //`
16			`// Copyright (C) 2010 Authors and OPENCORES.ORG //`
17			`// //`
18			`// This source file may be used and distributed without //`
19			`// restriction provided that this copyright statement is not //`
20			`// removed from the file and that any derivative work contains //`
21			`// the original copyright notice and the associated disclaimer. //`
22			`// //`
23			`// This source file is free software; you can redistribute it //`
24			`// and/or modify it under the terms of the GNU Lesser General //`
25			`// Public License as published by the Free Software Foundation; //`
26			`// either version 2.1 of the License, or (at your option) any //`
27			`// later version. //`
28			`// //`
29			`// This source is distributed in the hope that it will be //`
30			`// useful, but WITHOUT ANY WARRANTY; without even the implied //`
31			`// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //`
32			`// PURPOSE. See the GNU Lesser General Public License for more //`
33			`// details. //`
34			`// //`
35			`// You should have received a copy of the GNU Lesser General //`
36			`// Public License along with this source; if not, download it //`
37			`// from http://www.opencores.org/lgpl.shtml //`
38			`// //`
39			`*****************************************************************/`
40
41			`#include "amber_registers.h"`
42
43			`.section .text`
44			`.globl main`
45			`main:`
46
47			`mov r12, #0`
48
49
50			`loop: ldr r0, AdrData1`
51			`add r0, r0, r12, lsl #3 @ double-word elements`
52			`ldr r1, [r0], #4`
53			`ldr r2, [r0]`
54
55			`ldr r3, AdrData2`
56			`add r3, r3, r12, lsl #3 @ double-word elements`
57			`ldr r4, [r3], #4`
58			`ldr r5, [r3]`
59
60			`@ {r1, r2} - {r4, r5}`
61			`subs r6, r2, r5`
62			`sbc r7, r1, r4`
63
64			`ldr r0, AdrAnswers`
65			`add r0, r0, r12, lsl #3 @ double-word elements`
66			`ldr r1, [r0], #4`
67			`ldr r2, [r0]`
68
69			`cmp r1, r7`
70			`movne r10, #10`
71			`bne testfail`
72			`cmp r2, r6`
73			`movne r10, #20`
74			`bne testfail`
75
76			`@ increment loop counter`
77			`cmp r12, #2`
78			`beq testpass`
79			`add r12, r12, #1`
80			`b loop`
81
82			`testfail:`
83			`ldr r11, AdrTestStatus`
84			`str r10, [r11]`
85			`b testfail`
86
87			`testpass:`
88			`ldr r11, AdrTestStatus`
89			`mov r10, #17`
90			`str r10, [r11]`
91			`b testpass`
92
93
94
95			`/* Write 17 to this address to generate a Test Passed message */`
96			`AdrTestStatus: .word ADR_AMBER_TEST_STATUS`
97			`AdrData1: .word Data1`
98			`AdrData2: .word Data2`
99			`AdrAnswers: .word Answers`
100
101			`Data1:`
102			`@ HiWord, LoWord`
103			`.word 0x10000000`
104			`.word 0x00000001`
105			`.word 0x10000000`
106			`.word 0x00000000`
107			`.word 0x00000001`
108			`.word 0xc8d14800`
109
110			`Data2:`
111			`@ HiWord, LoWord`
112			`.word 0x08000000`
113			`.word 0x00000001`
114			`.word 0x08000000`
115			`.word 0xffffffff`
116			`.word 0x00000000`
117			`.word 0x3b9aca00`
118
119			`Answers:`
120			`@ HiWord, LoWord`
121			`.word 0x08000000`
122			`.word 0x00000000`
123			`.word 0x07ffffff`
124			`.word 0x00000001`
125			`.word 0x00000001`
126			`.word 0x8d367e00`
127
128
129			`/* ========================================================================= */`
130			`/* ========================================================================= */`
131
132

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[/] [amber/] [trunk/] [hw/] [tests/] [sbc.S] - Blame information for rev 84