x86, mem: memcpy_64.S: Optimize memcpy by enhanced REP MOVSB/STOSB

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Support memcpy() with enhanced rep movsb. On processors supporting enhanced
rep movsb, the alternative memcpy() function using enhanced rep movsb overrides the original function and the fast string
function.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1305671358-14478-8-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

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Fenghua Yu 2011-05-17 15:29:16 -07:00 • committed by H. Peter Anvin

parent 4307bec934

commit 101068c1f4

1 changed files with 32 additions and 13 deletions

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arch/x86/lib/memcpy_64.S

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