| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 1 | #ifndef _I386_BYTEORDER_H |
| 2 | #define _I386_BYTEORDER_H |
| 3 | |
| 4 | #include <asm/types.h> |
| 5 | |
| 6 | #ifdef __GNUC__ |
| 7 | |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 8 | |
| Graeme Russ | 2fe2a97 | 2008-09-07 07:08:42 +1000 | [diff] [blame] | 9 | static __inline__ __u32 ___arch__swab32(__u32 x) |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 10 | { |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 11 | __asm__("bswap %0" : "=r" (x) : "0" (x)); |
| Simon Glass | 59d6820 | 2017-01-16 07:04:04 -0700 | [diff] [blame] | 12 | |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 13 | return x; |
| 14 | } |
| 15 | |
| Simon Glass | 59d6820 | 2017-01-16 07:04:04 -0700 | [diff] [blame] | 16 | #define _constant_swab16(x) ((__u16)( \ |
| 17 | (((__u16)(x) & (__u16)0x00ffU) << 8) | \ |
| 18 | (((__u16)(x) & (__u16)0xff00U) >> 8))) |
| 19 | |
| Graeme Russ | 2fe2a97 | 2008-09-07 07:08:42 +1000 | [diff] [blame] | 20 | static __inline__ __u16 ___arch__swab16(__u16 x) |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 21 | { |
| Simon Glass | 59d6820 | 2017-01-16 07:04:04 -0700 | [diff] [blame] | 22 | #if CONFIG_IS_ENABLED(X86_64) |
| 23 | return _constant_swab16(x); |
| 24 | #else |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 25 | __asm__("xchgb %b0,%h0" /* swap bytes */ \ |
| 26 | : "=q" (x) \ |
| 27 | : "0" (x)); \ |
| 28 | return x; |
| Simon Glass | 59d6820 | 2017-01-16 07:04:04 -0700 | [diff] [blame] | 29 | #endif |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | #define __arch__swab32(x) ___arch__swab32(x) |
| 33 | #define __arch__swab16(x) ___arch__swab16(x) |
| 34 | |
| 35 | #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) |
| 36 | # define __BYTEORDER_HAS_U64__ |
| 37 | # define __SWAB_64_THRU_32__ |
| 38 | #endif |
| 39 | |
| 40 | #endif /* __GNUC__ */ |
| 41 | |
| 42 | #include <linux/byteorder/little_endian.h> |
| 43 | |
| 44 | #endif /* _I386_BYTEORDER_H */ |