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sh: introduce asm/swab.h

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Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Harvey Harrison 2009-01-06 14:56:25 -08:00 committed by Linus Torvalds
parent 13f7877bb5
commit 1af84a6253
3 changed files with 64 additions and 59 deletions
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1
arch/sh/include/asm/Kbuild
View file

@ -6,3 +6,4 @@ unifdef-y += unistd_32.h
unifdef-y += unistd_64.h
unifdef-y += posix_types_32.h
unifdef-y += posix_types_64.h
unifdef-y += swab.h

62
arch/sh/include/asm/byteorder.h
View file

@ -1,68 +1,12 @@
#ifndef __ASM_SH_BYTEORDER_H
#define __ASM_SH_BYTEORDER_H
/*
* Copyright (C) 1999 Niibe Yutaka
* Copyright (C) 2000, 2001 Paolo Alberelli
*/
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/swab.h>
#ifdef __LITTLE_ENDIAN__
# define __LITTLE_ENDIAN
#include <linux/byteorder/little_endian.h>
#else
# define __BIG_ENDIAN
#include <linux/byteorder/big_endian.h>
#endif
#define __SWAB_64_THRU_32__
static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
{
__asm__(
#ifdef __SH5__
"byterev %0, %0\n\t"
"shari %0, 32, %0"
#else
"swap.b %0, %0\n\t"
"swap.w %0, %0\n\t"
"swap.b %0, %0"
#endif
: "=r" (x)
: "0" (x));
return x;
}
#define __arch_swab32 __arch_swab32
static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
{
__asm__(
#ifdef __SH5__
"byterev %0, %0\n\t"
"shari %0, 32, %0"
#else
"swap.b %0, %0"
#endif
: "=r" (x)
: "0" (x));
return x;
}
#define __arch_swab16 __arch_swab16
static inline __u64 __arch_swab64(__u64 val)
{
union {
struct { __u32 a,b; } s;
__u64 u;
} v, w;
v.u = val;
w.s.b = __arch_swab32(v.s.a);
w.s.a = __arch_swab32(v.s.b);
return w.u;
}
#define __arch_swab64 __arch_swab64
#include <linux/byteorder.h>
#endif /* __ASM_SH_BYTEORDER_H */

60
arch/sh/include/asm/swab.h Normal file
View file

@ -0,0 +1,60 @@
#ifndef __ASM_SH_SWAB_H
#define __ASM_SH_SWAB_H
/*
* Copyright (C) 1999 Niibe Yutaka
* Copyright (C) 2000, 2001 Paolo Alberelli
*/
#include <linux/compiler.h>
#include <linux/types.h>
#define __SWAB_64_THRU_32__
static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
{
__asm__(
#ifdef __SH5__
"byterev %0, %0\n\t"
"shari %0, 32, %0"
#else
"swap.b %0, %0\n\t"
"swap.w %0, %0\n\t"
"swap.b %0, %0"
#endif
: "=r" (x)
: "0" (x));
return x;
}
#define __arch_swab32 __arch_swab32
static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
{
__asm__(
#ifdef __SH5__
"byterev %0, %0\n\t"
"shari %0, 32, %0"
#else
"swap.b %0, %0"
#endif
: "=r" (x)
: "0" (x));
return x;
}
#define __arch_swab16 __arch_swab16
static inline __u64 __arch_swab64(__u64 val)
{
union {
struct { __u32 a,b; } s;
__u64 u;
} v, w;
v.u = val;
w.s.b = __arch_swab32(v.s.a);
w.s.a = __arch_swab32(v.s.b);
return w.u;
}
#define __arch_swab64 __arch_swab64
#endif /* __ASM_SH_SWAB_H */