Merge branches 'x86/acpi', 'x86/apic', 'x86/cpudetect', 'x86/headers', 'x86/paravirt...
[linux-3.10.git] / arch / avr32 / include / asm / swab.h
1 /*
2  * AVR32 byteswapping functions.
3  */
4 #ifndef __ASM_AVR32_SWAB_H
5 #define __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__
13 extern unsigned long __builtin_bswap_32(unsigned long x);
14 extern 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)
22 static inline __attribute_const__ __u16 __arch_swab16(__u16 val)
23 {
24         return __builtin_bswap_16(val);
25 }
26 #define __arch_swab16 __arch_swab16
27
28 static 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 /* __ASM_AVR32_SWAB_H */