Thomas Gleixner | acbbbe9 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 1 | #ifndef _ASM_X86_BYTEORDER_H |
| 2 | #define _ASM_X86_BYTEORDER_H |
| 3 | |
| 4 | #include <asm/types.h> |
| 5 | #include <linux/compiler.h> |
| 6 | |
| 7 | #ifdef __GNUC__ |
| 8 | |
| 9 | #ifdef __i386__ |
| 10 | |
| 11 | static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) |
| 12 | { |
| 13 | #ifdef CONFIG_X86_BSWAP |
| 14 | __asm__("bswap %0" : "=r" (x) : "0" (x)); |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 15 | #else |
Thomas Gleixner | acbbbe9 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 16 | __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ |
| 17 | "rorl $16,%0\n\t" /* swap words */ |
| 18 | "xchgb %b0,%h0" /* swap higher bytes */ |
| 19 | :"=q" (x) |
| 20 | : "0" (x)); |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 21 | #endif |
Thomas Gleixner | acbbbe9 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 22 | return x; |
| 23 | } |
| 24 | |
| 25 | static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 val) |
| 26 | { |
| 27 | union { |
| 28 | struct { __u32 a,b; } s; |
| 29 | __u64 u; |
| 30 | } v; |
| 31 | v.u = val; |
| 32 | #ifdef CONFIG_X86_BSWAP |
| 33 | asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" |
| 34 | : "=r" (v.s.a), "=r" (v.s.b) |
| 35 | : "0" (v.s.a), "1" (v.s.b)); |
| 36 | #else |
| 37 | v.s.a = ___arch__swab32(v.s.a); |
| 38 | v.s.b = ___arch__swab32(v.s.b); |
| 39 | asm("xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) : "0" (v.s.a), "1" (v.s.b)); |
| 40 | #endif |
| 41 | return v.u; |
| 42 | } |
| 43 | |
| 44 | #else /* __i386__ */ |
| 45 | |
| 46 | static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x) |
| 47 | { |
| 48 | __asm__("bswapq %0" : "=r" (x) : "0" (x)); |
| 49 | return x; |
| 50 | } |
| 51 | |
| 52 | static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) |
| 53 | { |
| 54 | __asm__("bswapl %0" : "=r" (x) : "0" (x)); |
| 55 | return x; |
| 56 | } |
| 57 | |
| 58 | #endif |
| 59 | |
| 60 | /* Do not define swab16. Gcc is smart enough to recognize "C" version and |
| 61 | convert it into rotation or exhange. */ |
| 62 | |
| 63 | #define __arch__swab64(x) ___arch__swab64(x) |
| 64 | #define __arch__swab32(x) ___arch__swab32(x) |
| 65 | |
| 66 | #define __BYTEORDER_HAS_U64__ |
| 67 | |
| 68 | #endif /* __GNUC__ */ |
| 69 | |
| 70 | #include <linux/byteorder/little_endian.h> |
| 71 | |
| 72 | #endif /* _ASM_X86_BYTEORDER_H */ |