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Use sfence and mfence instructions on amd64

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Signed-off-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Matt Turner 2009-08-31 15:52:10 -04:00
parent 430c4af0d6
commit 563fa1c5d7
1 changed files with 2 additions and 4 deletions
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6
hw/xfree86/common/compiler.h
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@ -150,10 +150,8 @@ extern unsigned short ldw_brx(volatile unsigned char *, int);
# elif defined __amd64__ # elif defined __amd64__
# define mem_barrier() \ # define mem_barrier() __asm__ __volatile__ ("mfence" : : : "memory")
__asm__ __volatile__ ("lock; addl $0,0(%%rsp)" : : : "memory") # define write_mem_barrier() __asm__ __volatile__ ("sfence" : : : "memory")
# define write_mem_barrier() \
__asm__ __volatile__ ("" : : : "memory")
# elif defined __ia64__ # elif defined __ia64__