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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 branch and link instruction                           //
//                                                              //
//  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     r10, #100
        mov     r1, #37
        mov     r2, #47
        cmp     r1, r2
        movne   r3, #42
        moveq   r3, #0
        mov     r5, #0
 
        @ branch and link
        blne    1f
ret:
 
        cmp     r5, #0xff
        movne   r10, #10
        bne     testfail
 
        cmp     r1, #37
        movne   r10, #20
        bne     testfail
 
        cmp     r2, #47
        movne   r10, #30
        bne     testfail
 
        cmp     r3, #42
        movne   r10, #40
        bne     testfail
 
        b       testpass
 
 
        b       testfail
        b       testfail
 
        @ check that the link register gets the correct return address
1:      ldr     r6, =ret
        ldr     r7, PCMask
        and     r7, lr, r7
        cmp     r6, r7
        movne   r10, #80
        bne     testfail
 
        @ check that the value in r5 survives the jump back
        mov     r5, #0xff
        mov     pc, lr
        b       testfail
        b       testfail
 
 
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
PCMask:         .word 0x03fffffc
 
/* ========================================================================= */
/* ========================================================================= */
 
 

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 branch and link instruction //`
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 r10, #100`
48			`mov r1, #37`
49			`mov r2, #47`
50			`cmp r1, r2`
51			`movne r3, #42`
52			`moveq r3, #0`
53			`mov r5, #0`
54
55			`@ branch and link`
56			`blne 1f`
57			`ret:`
58
59			`cmp r5, #0xff`
60			`movne r10, #10`
61			`bne testfail`
62
63			`cmp r1, #37`
64			`movne r10, #20`
65			`bne testfail`
66
67			`cmp r2, #47`
68			`movne r10, #30`
69			`bne testfail`
70
71			`cmp r3, #42`
72			`movne r10, #40`
73			`bne testfail`
74
75			`b testpass`
76
77
78			`b testfail`
79			`b testfail`
80
81			`@ check that the link register gets the correct return address`
82			`1: ldr r6, =ret`
83			`ldr r7, PCMask`
84			`and r7, lr, r7`
85			`cmp r6, r7`
86			`movne r10, #80`
87			`bne testfail`
88
89			`@ check that the value in r5 survives the jump back`
90			`mov r5, #0xff`
91			`mov pc, lr`
92			`b testfail`
93			`b testfail`
94
95
96			`testfail:`
97			`ldr r11, AdrTestStatus`
98			`str r10, [r11]`
99			`b testfail`
100
101			`testpass:`
102			`ldr r11, AdrTestStatus`
103			`mov r10, #17`
104			`str r10, [r11]`
105			`b testpass`
106
107
108			`/* Write 17 to this address to generate a Test Passed message */`
109			`AdrTestStatus: .word ADR_AMBER_TEST_STATUS`
110			`PCMask: .word 0x03fffffc`
111
112			`/* ========================================================================= */`
113			`/* ========================================================================= */`
114
115

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[/] [amber/] [trunk/] [hw/] [tests/] [bl.S] - Blame information for rev 2