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How to disable FPU on Intel Core2 Duo

adamczez
Beginner
‎05-02-2009 03:26 AM
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Can I disable FPU on Intel Core 2 Duo CPU? I would like to measure performance of my code where FPU is not available ie. all FP instructions are executed in emulation mode. I was able to do that some 10 years ago by using CR0 register.

Thanks

Adam
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jancino
Beginner
‎05-04-2009 02:35 AM
744 Views
Quoting - adamczez
Can I disable FPU on Intel Core 2 Duo CPU? I would like to measure performance of my code where FPU is not available ie. all FP instructions are executed in emulation mode. I was able to do that some 10 years ago by using CR0 register.

Thanks

Adam

I think that when you disable FPU processor will generate exception when it tryes to execute FPU instruction. I think that FPU instructions must be emulated by software (look at yourcompiler options).
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