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swab.h
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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)
23 {
24  return __builtin_bswap_16(val);
25 }
26 #define __arch_swab16 __arch_swab16
27 
29 {
30  return __builtin_bswap_32(val);
31 }
32 #define __arch_swab32 __arch_swab32
33 #endif
34 
35 #endif /* __ASM_AVR32_SWAB_H */