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sh: SH-5 byteorder routines. 

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2007-11-09 13:58:44 +09:00
parent 4690bdc7c6
commit 7a65eaf488
1 changed files with 30 additions and 15 deletions
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45
include/asm-sh/byteorder.h
View File

@ -3,40 +3,55 @@
/*
* Copyright (C) 1999 Niibe Yutaka
* Copyright (C) 2000, 2001 Paolo Alberelli
*/
#include <asm/types.h>
#include <linux/compiler.h>
#include <linux/types.h>
static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
{
__asm__("swap.b %0, %0\n\t"
"swap.w %0, %0\n\t"
"swap.b %0, %0"
__asm__(
#ifdef CONFIG_SUPERH32
"swap.b %0, %0\n\t"
"swap.w %0, %0\n\t"
"swap.b %0, %0"
#else
"byterev %0, %0\n\t"
"shari %0, 32, %0"
#endif
: "=r" (x)
: "0" (x));
return x;
}
static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
static inline __attribute_const__ __u16 ___arch__swab16(__u16 x)
{
__asm__("swap.b %0, %0"
__asm__(
#ifdef CONFIG_SUPERH32
"swap.b %0, %0"
#else
"byterev %0, %0\n\t"
"shari %0, 32, %0"
#endif
: "=r" (x)
: "0" (x));
return x;
}
static inline __u64 ___arch__swab64(__u64 val)
{
union {
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;
}
w.s.b = ___arch__swab32(v.s.a);
w.s.a = ___arch__swab32(v.s.b);
return w.u;
}
#define __arch__swab64(x) ___arch__swab64(x)
#define __arch__swab32(x) ___arch__swab32(x)