swab.h revision e7f2c8c1f0e5b062c23001dac229e570228940e8 
1/*
2 * AVR32 byteswapping functions.
3 */
4#ifndef _UAPI__ASM_AVR32_SWAB_H
5#define _UAPI__ASM_AVR32_SWAB_H
6
7#include <linux/types.h>
8#include <linux/compiler.h>
9
10#define __SWAB_64_THRU_32__
11
12#ifdef __CHECKER__
13extern unsigned long __builtin_bswap_32(unsigned long x);
14extern unsigned short __builtin_bswap_16(unsigned short x);
15#endif
16
17/*
18 * avr32-linux-gcc versions earlier than 4.2 improperly sign-extends
19 * the result.
20 */
21#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2)
22static inline __attribute_const__ __u16 __arch_swab16(__u16 val)
23{
24	return __builtin_bswap_16(val);
25}
26#define __arch_swab16 __arch_swab16
27
28static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
29{
30	return __builtin_bswap_32(val);
31}
32#define __arch_swab32 __arch_swab32
33#endif
34
35#endif /* _UAPI__ASM_AVR32_SWAB_H */
36