Messages in this thread | | | Date | Mon, 15 Aug 2011 09:12:07 -0700 | From | "H. Peter Anvin" <> | Subject | Re: x86 memcpy performance |
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On 08/15/2011 08:36 AM, Andrew Lutomirski wrote: > > (*) kernel_fpu_begin is a bad name. It's only safe to use integer > instructions inside a kernel_fpu_begin section because MXCSR (and the > 387 equivalent) could contain garbage. >
Uh... no, it just means you have to initialize the settings. It's a perfectly good name, it's called kernel_fpu_begin, not kernel_fp_begin.
-hpa
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