Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / x86 / include / uapi / asm / swab.h

diff --git a/kernel/arch/x86/include/uapi/asm/swab.h b/kernel/arch/x86/include/uapi/asm/swab.h
new file mode 100644 (file)
index 0000000..7f235c7
--- /dev/null
+++ b/kernel/arch/x86/include/uapi/asm/swab.h
@@ -0,0 +1,36 @@
+#ifndef _ASM_X86_SWAB_H
+#define _ASM_X86_SWAB_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
+{
+       asm("bswapl %0" : "=r" (val) : "0" (val));
+       return val;
+}
+#define __arch_swab32 __arch_swab32
+
+static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
+{
+#ifdef __i386__
+       union {
+               struct {
+                       __u32 a;
+                       __u32 b;
+               } s;
+               __u64 u;
+       } v;
+       v.u = val;
+       asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
+           : "=r" (v.s.a), "=r" (v.s.b)
+           : "0" (v.s.a), "1" (v.s.b));
+       return v.u;
+#else /* __i386__ */
+       asm("bswapq %0" : "=r" (val) : "0" (val));
+       return val;
+#endif
+}
+#define __arch_swab64 __arch_swab64
+
+#endif /* _ASM_X86_SWAB_H */