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authorEric Dumazet <dada1@cosmosbay.com>2005-09-06 15:16:17 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:15 -0700
commit19aaabb5841439988fc357f90d5c59d28fa84658 (patch)
tree928d0b695a7c27a61ef7b93549a50014374bf4fe /arch
parentc078d3266e58a3edd698b9f143f78fc585679031 (diff)
downloadop-kernel-dev-19aaabb5841439988fc357f90d5c59d28fa84658.zip
op-kernel-dev-19aaabb5841439988fc357f90d5c59d28fa84658.tar.gz
[PATCH] x86_64: prefetchw() can fall back to prefetch() if !3DNOW
This is a multi-part message in MIME format. If the cpu lacks 3DNOW feature, we can use a normal prefetcht0 instruction instead of NOP5. "prefetchw (%rxx)" and "prefetcht0 (%rxx)" have the same length, ranging from 3 to 5 bytes depending on the register. So this patch even helps AMD64, shortening the length of the code. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions
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