Programming Forums > Application Development > Assembly

Klarre · May 29th, 2006, 10:56 AM

I am using this square root function from within my C++ application. But I am a little bit worried that it might not be totally fail safe. Can it in some way "screw it up" for other applications that uses the FPU at the "same" time? How should I fix it if that's so?

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.586
.model flat, C

.code

sqrt proc x:DWORD
	fld x
	fsqrt
	ret

sqrt endp

end

Thanks for your help!

/Klarre

SittingDuck · Jun 19th, 2006, 9:29 AM

Err, well Intel says it's FPU is really reliable. It won't "screw it up" for other applications because the operating system will take care of it - it should save the state of the CPU and FPU before switching to a different application.

May 29th, 2006, 10:56 AM	#1
Klarre Game engine designer Join Date: May 2005 Location: Sweden Posts: 301 Rep Power: 4	Safe code? I am using this square root function from within my C++ application. But I am a little bit worried that it might not be totally fail safe. Can it in some way "screw it up" for other applications that uses the FPU at the "same" time? How should I fix it if that's so? (Toggle Plain Text) .586 .model flat, C .code sqrt proc x:DWORD fld x fsqrt ret sqrt endp end .586 .model flat, C .code sqrt proc x:DWORD fld x fsqrt ret sqrt endp end Thanks for your help! /Klarre __________________ http://www.klarre.se

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Jun 19th, 2006, 9:29 AM	#2
SittingDuck Programmer Join Date: Nov 2005 Location: Moseley, Birmingham, England, Earth Posts: 51 Rep Power: 3	Err, well Intel says it's FPU is really reliable. It won't "screw it up" for other applications because the operating system will take care of it - it should save the state of the CPU and FPU before switching to a different application.

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Programming Forums > Application Development > Assembly

Safe code?