From 430c4af0d6e2cad03ca5f49ec6e87f3717d0d9e2 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Mon, 31 Aug 2009 15:51:41 -0400 Subject: [PATCH] Add x86 barrier macros Signed-off-by: Matt Turner --- hw/xfree86/common/compiler.h | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/hw/xfree86/common/compiler.h b/hw/xfree86/common/compiler.h index d1467eb7b..bb3e935a5 100644 --- a/hw/xfree86/common/compiler.h +++ b/hw/xfree86/common/compiler.h @@ -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")