Remove the very old x86 code and add support for 64-bit.
Signed-off-by: Simon Glass sjg@chromium.org Reviewed-by: Bin Meng bmeng.cn@gmail.com ---
Changes in v3: None Changes in v2: None
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 7dfeb8bbed2..a2d1fd8703b 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)