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Diffstat (limited to 'arch/arm/include/asm/swab.h')
-rw-r--r--arch/arm/include/asm/swab.h37
1 files changed, 1 insertions, 36 deletions
diff --git a/arch/arm/include/asm/swab.h b/arch/arm/include/asm/swab.h
index b859d82e30ca..537fc9b91889 100644
--- a/arch/arm/include/asm/swab.h
+++ b/arch/arm/include/asm/swab.h
@@ -15,14 +15,8 @@
15#ifndef __ASM_ARM_SWAB_H 15#ifndef __ASM_ARM_SWAB_H
16#define __ASM_ARM_SWAB_H 16#define __ASM_ARM_SWAB_H
17 17
18#include <linux/compiler.h> 18#include <uapi/asm/swab.h>
19#include <linux/types.h>
20 19
21#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
22# define __SWAB_64_THRU_32__
23#endif
24
25#if defined(__KERNEL__)
26#if __LINUX_ARM_ARCH__ >= 6 20#if __LINUX_ARM_ARCH__ >= 6
27 21
28static inline __attribute_const__ __u32 __arch_swahb32(__u32 x) 22static inline __attribute_const__ __u32 __arch_swahb32(__u32 x)
@@ -42,32 +36,3 @@ static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
42 36
43#endif 37#endif
44#endif 38#endif
45
46#if !defined(__KERNEL__) || __LINUX_ARM_ARCH__ < 6
47static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
48{
49 __u32 t;
50
51#ifndef __thumb__
52 if (!__builtin_constant_p(x)) {
53 /*
54 * The compiler needs a bit of a hint here to always do the
55 * right thing and not screw it up to different degrees
56 * depending on the gcc version.
57 */
58 asm ("eor\t%0, %1, %1, ror #16" : "=r" (t) : "r" (x));
59 } else
60#endif
61 t = x ^ ((x << 16) | (x >> 16)); /* eor r1,r0,r0,ror #16 */
62
63 x = (x << 24) | (x >> 8); /* mov r0,r0,ror #8 */
64 t &= ~0x00FF0000; /* bic r1,r1,#0x00FF0000 */
65 x ^= (t >> 8); /* eor r0,r0,r1,lsr #8 */
66
67 return x;
68}
69#define __arch_swab32 __arch_swab32
70
71#endif
72
73#endif