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Testing Inline ASM-VB
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Using inline ASM
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News
Files Visual Basic
Strings
Math
General
Properties
Memory
Methods Search
Testing Inline ASM-VB
Strings
Math
General
Memory Search
Using inline ASM
Submit!
Sqr() vs. ASM fsqrtThis is a small snippet which I received from Alex Spurling. It calculates the square root from the given number. The result is similar to VB's sqr() function.
User contributed notes:
|
'//Call this like: '//intSQR = 3 '//Call asmSqr(intSQR) Public Sub asmSqr(ByRef num As Single) '//By Alex Spurling - Thanks! '#ASM_START ' push ebp ' mov ebp, esp ' ' mov eax, DWORD PTR [ebp+8] ' ' fld dword ptr [eax] ' fsqrt ' fstp dword ptr [eax] ' ' mov esp, ebp ' pop ebp ' ret 4 '#ASM_END End Sub |
| VBSQR % faster than ASMSQR | VBSQR (sec) | ASMSQR (sec) |
| 133.7% | 0.000762 | 0.000326 |
| 80.4% | 0.000585 | 0.000324 |
| 82.2% | 0.000593 | 0.000325 |
| 81.4% | 0.00059 | 0.000325 |
| 92.8% | 0.000627 | 0.000325 |
| VBSQR % faster than ASMSQR | VBSQR (sec) | ASMSQR (sec) |
| 47.3% | 0.001373 | 0.000932 |
| 86.8% | 0.001207 | 0.000646 |
| 100.9% | 0.001298 | 0.000646 |
| 87.3% | 0.001215 | 0.000649 |
| 50.3% | 0.0012 | 0.000799 |
User contributed notes:
| Author: Tom (hurendo_kun at hotmail dot com) | Date: 05:09 23/09/2005 |
| Not sure why this is different. VB delegates to the FPU anyway. | |