DragonFly-2.3.2.54.gab6109 master sys/cpu/amd64/include atomic.h
commit ab6109fbf5fccc452927e19ab4ed5ad0f62e4a38
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Wed Jul 15 09:44:22 2009 -0700
Adjust atomic_cmpset_int/long - Faster version, fix amd64 issue.
* Instead of using the condition code just compare %eax (or %rax)
against the old value. This is considerably faster then using
sete/movzbl and GCC will also optimize the caller's test for
both 0 or non-zero.
* AMD64. long is 64 bits, use cmpxchgq (it was previously using cmpxchgl).
Summary of changes:
sys/cpu/amd64/include/atomic.h | 15 +++++++++------
sys/cpu/i386/include/atomic.h | 4 +---
2 files changed, 10 insertions(+), 9 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/ab6109fbf5fccc452927e19ab4ed5ad0f62e4a38
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