Messages in this thread | | | Subject | Re: [BK+PATCH] remove __constant_memcpy | From | Alan Cox <> | Date | 17 Apr 2003 14:17:16 +0100 |
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On Iau, 2003-04-17 at 01:57, Jeff Garzik wrote: > The patch below is the conservative, obvious patch. It only kicks in > when __builtin_constant_p() is true, and it only applies to the i386 > arch.
You are assuming the compiler is smart about stuff - it doesnt know SSE/MMX for page copies etc. For small copies it should alays win, but isn't it best if so to use __builtin_memcpy without our existing macros not just trust the compiler ?
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