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support for x86-64.

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This commit is contained in:
Takashi Iwai 2002-06-20 14:55:05 +00:00
parent e9470d4cf3
commit b20beb55f7
1 changed files with 7 additions and 1 deletions
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8
include/iatomic.h
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@ -1,7 +1,7 @@
#ifndef __ALSA_IATOMIC_H
#define __ALSA_IATOMIC_H
#ifdef __i386__
#if defined(__i386__) || defined(__x86_64__)
/*
* Atomic operations that C can't guarantee us. Useful for
@ -206,9 +206,15 @@ __asm__ __volatile__(LOCK "orl %0,%1" \
* and add some real memory barriers if so.
*/
#ifdef __i386__
#define mb() __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory")
#define rmb() mb()
#define wmb() __asm__ __volatile__ ("": : :"memory")
#else
#define mb() asm volatile("mfence":::"memory")
#define rmb() asm volatile("lfence":::"memory")
#define wmb() asm volatile("sfence":::"memory")
#endif
#define IATOMIC_DEFINED 1