forked from KolibriOS/kolibrios
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
#ifndef _ASM_X86_SWAB_H
|
|
#define _ASM_X86_SWAB_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/compiler.h>
|
|
|
|
static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
|
|
{
|
|
#ifdef __i386__
|
|
# ifdef CONFIG_X86_BSWAP
|
|
asm("bswap %0" : "=r" (val) : "0" (val));
|
|
# else
|
|
asm("xchgb %b0,%h0\n\t" /* swap lower bytes */
|
|
"rorl $16,%0\n\t" /* swap words */
|
|
"xchgb %b0,%h0" /* swap higher bytes */
|
|
: "=q" (val)
|
|
: "0" (val));
|
|
# endif
|
|
|
|
#else /* __i386__ */
|
|
asm("bswapl %0"
|
|
: "=r" (val)
|
|
: "0" (val));
|
|
#endif
|
|
return val;
|
|
}
|
|
#define __arch_swab32 __arch_swab32
|
|
|
|
static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
|
|
{
|
|
#ifdef __i386__
|
|
union {
|
|
struct {
|
|
__u32 a;
|
|
__u32 b;
|
|
} s;
|
|
__u64 u;
|
|
} v;
|
|
v.u = val;
|
|
# ifdef CONFIG_X86_BSWAP
|
|
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));
|
|
# endif
|
|
return v.u;
|
|
#else /* __i386__ */
|
|
asm("bswapq %0"
|
|
: "=r" (val)
|
|
: "0" (val));
|
|
return val;
|
|
#endif
|
|
}
|
|
#define __arch_swab64 __arch_swab64
|
|
|
|
#endif /* _ASM_X86_SWAB_H */
|