| #ifndef _ASM_X86_SWAB_H |
| #define _ASM_X86_SWAB_H |
| |
| #include <linux/types.h> |
| |
| |
| static __inline__ __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__ __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 */ |