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Add x86 barrier macros 

Signed-off-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Matt Turner 2009-08-31 15:51:41 -04:00
parent 0d87f77a3f
commit 430c4af0d6
1 changed files with 15 additions and 1 deletions
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16
hw/xfree86/common/compiler.h
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@ -129,7 +129,21 @@ extern unsigned short ldw_brx(volatile unsigned char *, int);
# ifndef NO_INLINE
# ifdef __GNUC__
# ifdef __alpha__
# ifdef __i386__
# ifdef __SSE__
# define write_mem_barrier() __asm__ __volatile__ ("sfence" : : : "memory")
# else
# define write_mem_barrier() __asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
# endif
# ifdef __SSE2__
# define mem_barrier() __asm__ __volatile__ ("mfence" : : : "memory")
# else
# define mem_barrier() __asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
# endif
# elif defined __alpha__
# define mem_barrier() __asm__ __volatile__ ("mb" : : : "memory")
# define write_mem_barrier() __asm__ __volatile__ ("wmb" : : : "memory")