From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 include/asm-i386/byteorder.h | 59 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 include/asm-i386/byteorder.h

(limited to 'include/asm-i386/byteorder.h')

diff --git a/include/asm-i386/byteorder.h b/include/asm-i386/byteorder.h
new file mode 100644
index 0000000..a0d73f4
--- /dev/null
+++ b/include/asm-i386/byteorder.h
@@ -0,0 +1,59 @@
+#ifndef _I386_BYTEORDER_H
+#define _I386_BYTEORDER_H
+
+#include <asm/types.h>
+#include <linux/compiler.h>
+
+#ifdef __GNUC__
+
+/* For avoiding bswap on i386 */
+#ifdef __KERNEL__
+#include <linux/config.h>
+#endif
+
+static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
+{
+#ifdef CONFIG_X86_BSWAP
+	__asm__("bswap %0" : "=r" (x) : "0" (x));
+#else
+	__asm__("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
+		"rorl $16,%0\n\t"	/* swap words		*/
+		"xchgb %b0,%h0"		/* swap higher bytes	*/
+		:"=q" (x)
+		: "0" (x));
+#endif
+	return x;
+}
+
+static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 val)
+{ 
+	union { 
+		struct { __u32 a,b; } s;
+		__u64 u;
+	} v;
+	v.u = val;
+#ifdef CONFIG_X86_BSWAP
+	asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" 
+	    : "=r" (v.s.a), "=r" (v.s.b) 
+	    : "0" (v.s.a), "1" (v.s.b)); 
+#else
+   v.s.a = ___arch__swab32(v.s.a); 
+	v.s.b = ___arch__swab32(v.s.b); 
+	asm("xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) : "0" (v.s.a), "1" (v.s.b));
+#endif
+	return v.u;	
+} 
+
+/* Do not define swab16.  Gcc is smart enough to recognize "C" version and
+   convert it into rotation or exhange.  */
+
+#define __arch__swab64(x) ___arch__swab64(x)
+#define __arch__swab32(x) ___arch__swab32(x)
+
+#define __BYTEORDER_HAS_U64__
+
+#endif /* __GNUC__ */
+
+#include <linux/byteorder/little_endian.h>
+
+#endif /* _I386_BYTEORDER_H */
-- 
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