#define FIO_HAVE_SYSLET
#define nop __asm__ __volatile__("rep;nop": : :"memory")
-#define read_barrier() asm volatile("lfence":::"memory")
+#define read_barrier() __asm__ __volatile__("lfence":::"memory")
+#define write_barrier() __asm__ __volatile__("sfence":::"memory")
+
+static inline unsigned int arch_ffz(unsigned int bitmask)
+{
+ __asm__("bsfl %1,%0" :"=r" (bitmask) :"r" (~bitmask));
+ return bitmask;
+}
+#define ARCH_HAVE_FFZ
+#define ARCH_HAVE_SSE
#endif