Remove the very old x86 code and add support for 64-bit.
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/x86/include/asm/byteorder.h | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/arch/x86/include/asm/byteorder.h b/arch/x86/include/asm/byteorder.h
index 7dfeb8b..a2d1fd8 100644
--- a/arch/x86/include/asm/byteorder.h
+++ b/arch/x86/include/asm/byteorder.h
@@ -8,24 +8,25 @@
static __inline__ __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;
}
+#define _constant_swab16(x) ((__u16)( \
+ (((__u16)(x) & (__u16)0x00ffU) << 8) | \
+ (((__u16)(x) & (__u16)0xff00U) >> 8)))
+
static __inline__ __u16 ___arch__swab16(__u16 x)
{
+#if CONFIG_IS_ENABLED(X86_64)
+ return _constant_swab16(x);
+#else
__asm__("xchgb %b0,%h0" /* swap bytes */ \
: "=q" (x) \
: "0" (x)); \
return x;
+#endif
}
#define __arch__swab32(x) ___arch__swab32(x)
--
2.8.0.rc3.226.g39d4020
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