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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 sub and subs                                          //
//                                                              //
//  Author(s):                                                  //
//      - Conor Santifort, csantifort.amber@gmail.com           //
//                                                              //
/*****************************************************************
//                                                              //
//  Amber 2 Core Instruction Test                               //
//                                                              //
//  This file is part of the Amber project                      //
//  http://www.opencores.org/project,amber                      //
//                                                              //
//  Description                                                 //
//  Tests sub and subs instructions                             //
//                                                              //
//  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, =Data1
        ldr     r6, Data2
        ldr     lr, =1f
        mov     pc, lr
 
        @ Test subs
1:      ldr     r3, [r0]
        subs    r2,  r3,  #1
        cmpcs   r2,  r6
        movcs   r3,  #0
        cmp     r3,  #0
 
        movne   r10, #10
        bne     testfail
 
 
        @ Test sub
/* 1 - 0x7fffffff */
        ldr     r1, MaxPos
        mov     r2, #1
        sub     r3, r2, r1
        ldr     r4, MaxNeg
        add     r4, r4, #2
        cmp     r4, r3
        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
MaxPos:         .word  0x7fffffff
MaxNeg:         .word  0x80000000
Data1:          .word  0x03000000
Data2:          .word  0x020febed
/* ========================================================================= */
/* ========================================================================= */
 
 

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 sub and subs //`
10			`// //`
11			`// Author(s): //`
12			`// - Conor Santifort, csantifort.amber@gmail.com //`
13			`// //`
14	11	csantifort	`/*****************************************************************`
15			`// //`
16			`// Amber 2 Core Instruction Test //`
17			`// //`
18			`// This file is part of the Amber project //`
19			`// http://www.opencores.org/project,amber //`
20			`// //`
21			`// Description //`
22			`// Tests sub and subs instructions //`
23			`// //`
24			`// Author(s): //`
25			`// - Conor Santifort, csantifort.amber@gmail.com //`
26			`// //`
27	2	csantifort	`//////////////////////////////////////////////////////////////////`
28			`// //`
29			`// Copyright (C) 2010 Authors and OPENCORES.ORG //`
30			`// //`
31			`// This source file may be used and distributed without //`
32			`// restriction provided that this copyright statement is not //`
33			`// removed from the file and that any derivative work contains //`
34			`// the original copyright notice and the associated disclaimer. //`
35			`// //`
36			`// This source file is free software; you can redistribute it //`
37			`// and/or modify it under the terms of the GNU Lesser General //`
38			`// Public License as published by the Free Software Foundation; //`
39			`// either version 2.1 of the License, or (at your option) any //`
40			`// later version. //`
41			`// //`
42			`// This source is distributed in the hope that it will be //`
43			`// useful, but WITHOUT ANY WARRANTY; without even the implied //`
44			`// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //`
45			`// PURPOSE. See the GNU Lesser General Public License for more //`
46			`// details. //`
47			`// //`
48			`// You should have received a copy of the GNU Lesser General //`
49			`// Public License along with this source; if not, download it //`
50			`// from http://www.opencores.org/lgpl.shtml //`
51			`// //`
52			`*****************************************************************/`
53
54			`#include "amber_registers.h"`
55
56			`.section .text`
57			`.globl main`
58			`main:`
59	11	csantifort	`ldr r0, =Data1`
60			`ldr r6, Data2`
61			`ldr lr, =1f`
62			`mov pc, lr`
63
64			`@ Test subs`
65			`1: ldr r3, [r0]`
66			`subs r2, r3, #1`
67			`cmpcs r2, r6`
68			`movcs r3, #0`
69			`cmp r3, #0`
70	2	csantifort
71	11	csantifort	`movne r10, #10`
72			`bne testfail`
73	2	csantifort
74
75	11	csantifort	`@ Test sub`
76			`/* 1 - 0x7fffffff */`
77			`ldr r1, MaxPos`
78			`mov r2, #1`
79			`sub r3, r2, r1`
80			`ldr r4, MaxNeg`
81			`add r4, r4, #2`
82			`cmp r4, r3`
83			`movne r10, #20`
84			`bne testfail`
85
86			`b testpass`
87	2	csantifort
88	11	csantifort
89	2	csantifort	`testfail:`
90			`ldr r11, AdrTestStatus`
91			`str r10, [r11]`
92			`b testfail`
93
94			`testpass:`
95			`ldr r11, AdrTestStatus`
96			`mov r10, #17`
97			`str r10, [r11]`
98			`b testpass`
99
100
101			`/* Write 17 to this address to generate a Test Passed message */`
102			`AdrTestStatus: .word ADR_AMBER_TEST_STATUS`
103			`MaxPos: .word 0x7fffffff`
104	11	csantifort	`MaxNeg: .word 0x80000000`
105			`Data1: .word 0x03000000`
106			`Data2: .word 0x020febed`
107	2	csantifort	`/* ========================================================================= */`
108			`/* ========================================================================= */`
109
110

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[/] [amber/] [trunk/] [hw/] [tests/] [sub.S] - Blame information for rev 66