|
Last change
on this file was
81,
checked in by rosiere, 17 years ago
|
- Finish Environment (and test)
- Continue predictor_unit
- Add external tools
- svn keyword "Id" set
|
-
Property svn:keywords set to
Id
|
|
File size:
1.3 KB
|
| Line | |
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| 1 | /******************************************** |
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| 2 | * files : asm_002_addc.s |
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| 3 | * authors : Rosiere Mathieu |
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| 4 | * date : 2006/06/20 |
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| 5 | ******************************************** |
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| 6 | * input : - |
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| 7 | * output : 1 test OK |
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| 8 | * 0 test KO |
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| 9 | ******************************************** |
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| 10 | * test : Test the carry |
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| 11 | * warning : instructions used |
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| 12 | * l.add |
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| 13 | * l.addi |
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| 14 | * l.and |
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| 15 | * l.bf |
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| 16 | * l.jal |
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| 17 | * l.jr |
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| 18 | * l.sfne |
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| 19 | ******************************************** |
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| 20 | */ |
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| 21 | .file "asm_002_addc.s" |
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| 22 | .section .text |
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| 23 | .align 4 |
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| 24 | |
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| 25 | .global _asm_002_addc |
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| 26 | _asm_002_addc : |
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| 27 | /* save context */ |
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| 28 | l.addi r1,r1,-12 |
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| 29 | l.sw 0(r1),r20 |
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| 30 | l.sw 4(r1),r21 |
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| 31 | l.sw 8(r1),r22 |
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| 32 | /* Return is KO (default) */ |
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| 33 | l.and r11,r0,r0 |
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| 34 | |
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| 35 | /* |
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| 36 | * R20 = 0x00000001 |
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| 37 | * R21 = 0xFFFFFFFF |
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| 38 | * R22 = 0x00000000 and carry is set |
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| 39 | */ |
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| 40 | l.addi r20,r0, 1 |
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| 41 | l.addi r21,r0,-1 |
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| 42 | l.add r22,r20,r21 |
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| 43 | |
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| 44 | /* Add the carry */ |
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| 45 | l.addc r22,r0,r0 |
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| 46 | |
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| 47 | l.sfne r22,r20 |
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| 48 | l.bf _asm_002_addc_ko |
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| 49 | l.nop 0 |
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| 50 | |
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| 51 | _asm_002_addc_ok : |
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| 52 | l.addi r11,r0,1 |
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| 53 | |
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| 54 | _asm_002_addc_ko : |
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| 55 | /* load context */ |
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| 56 | l.lwz r22,8(r1) |
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| 57 | l.lwz r21,4(r1) |
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| 58 | l.lwz r20,0(r1) |
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| 59 | l.jr r9 |
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| 60 | l.addi r1,r1,12 |
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