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Diffstat (limited to 'arch/arm/include/asm/byteorder.h')
-rw-r--r--arch/arm/include/asm/byteorder.h33
1 files changed, 1 insertions, 32 deletions
diff --git a/arch/arm/include/asm/byteorder.h b/arch/arm/include/asm/byteorder.h
index 4fbfb22f65a..c02b6fc28e1 100644
--- a/arch/arm/include/asm/byteorder.h
+++ b/arch/arm/include/asm/byteorder.h
@@ -15,38 +15,7 @@
15#ifndef __ASM_ARM_BYTEORDER_H 15#ifndef __ASM_ARM_BYTEORDER_H
16#define __ASM_ARM_BYTEORDER_H 16#define __ASM_ARM_BYTEORDER_H
17 17
18#include <linux/compiler.h> 18#include <asm/swab.h>
19#include <asm/types.h>
20
21static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
22{
23 __u32 t;
24
25#ifndef __thumb__
26 if (!__builtin_constant_p(x)) {
27 /*
28 * The compiler needs a bit of a hint here to always do the
29 * right thing and not screw it up to different degrees
30 * depending on the gcc version.
31 */
32 asm ("eor\t%0, %1, %1, ror #16" : "=r" (t) : "r" (x));
33 } else
34#endif
35 t = x ^ ((x << 16) | (x >> 16)); /* eor r1,r0,r0,ror #16 */
36
37 x = (x << 24) | (x >> 8); /* mov r0,r0,ror #8 */
38 t &= ~0x00FF0000; /* bic r1,r1,#0x00FF0000 */
39 x ^= (t >> 8); /* eor r0,r0,r1,lsr #8 */
40
41 return x;
42}
43
44#define __arch__swab32(x) ___arch__swab32(x)
45
46#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
47# define __BYTEORDER_HAS_U64__
48# define __SWAB_64_THRU_32__
49#endif
50 19
51#ifdef __ARMEB__ 20#ifdef __ARMEB__
52#include <linux/byteorder/big_endian.h> 21#include <linux/byteorder/big_endian.h>