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yaml
---
r: 88928
b: refs/heads/master
c: 3460509
h: refs/heads/master
v: v3
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Joe Perches authored and Ingo Molnar committed Apr 17, 2008
1 parent d741627 commit ae0ab28
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2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 86d8a08616ecbc510323bfca591816a5709c6e54
refs/heads/master: 346050952cac11b25a98c7e1743412b416827314
39 changes: 24 additions & 15 deletions trunk/include/asm-x86/byteorder.h
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Expand Up @@ -8,50 +8,59 @@

#ifdef __i386__

static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
{
#ifdef CONFIG_X86_BSWAP
__asm__("bswap %0" : "=r" (x) : "0" (x));
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));
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;
}

static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 val)
static inline __attribute_const__ __u64 ___arch__swab64(__u64 val)
{
union {
struct { __u32 a,b; } s;
struct {
__u32 a;
__u32 b;
} s;
__u64 u;
} v;
v.u = val;
#ifdef CONFIG_X86_BSWAP
__asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
: "=r" (v.s.a), "=r" (v.s.b)
: "0" (v.s.a), "1" (v.s.b));
#else
v.s.a = ___arch__swab32(v.s.a);
v.s.b = ___arch__swab32(v.s.b);
__asm__("xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) : "0" (v.s.a), "1" (v.s.b));
asm("xchgl %0,%1"
: "=r" (v.s.a), "=r" (v.s.b)
: "0" (v.s.a), "1" (v.s.b));
#endif
return v.u;
}

#else /* __i386__ */

static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
static inline __attribute_const__ __u64 ___arch__swab64(__u64 x)
{
__asm__("bswapq %0" : "=r" (x) : "0" (x));
asm("bswapq %0"
: "=r" (x)
: "0" (x));
return x;
}

static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
{
__asm__("bswapl %0" : "=r" (x) : "0" (x));
asm("bswapl %0"
: "=r" (x)
: "0" (x));
return x;
}

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