diff options
| author | Harvey Harrison <harvey.harrison@gmail.com> | 2009-01-06 14:56:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 18:10:26 -0800 |
| commit | 292b4d0978e3bbb087a83ce77e389c7b462a093c (patch) | |
| tree | d240d83e170696543688f9f58384c1ede986b507 /arch/avr32/include/asm/swab.h | |
| parent | 991c0e6d1ae3df59f0ddfe05edecec8319e35a1b (diff) | |
| download | linux-292b4d0978e3bbb087a83ce77e389c7b462a093c.tar.gz linux-292b4d0978e3bbb087a83ce77e389c7b462a093c.tar.bz2 linux-292b4d0978e3bbb087a83ce77e389c7b462a093c.zip | |
avr32: introduce asm/swab.h
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/avr32/include/asm/swab.h')
| -rw-r--r-- | arch/avr32/include/asm/swab.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/swab.h b/arch/avr32/include/asm/swab.h new file mode 100644 index 000000000000..a14aa5b46d98 --- /dev/null +++ b/arch/avr32/include/asm/swab.h @@ -0,0 +1,35 @@ +/* + * AVR32 byteswapping functions. + */ +#ifndef __ASM_AVR32_SWAB_H +#define __ASM_AVR32_SWAB_H + +#include <asm/types.h> +#include <linux/compiler.h> + +#define __SWAB_64_THRU_32__ + +#ifdef __CHECKER__ +extern unsigned long __builtin_bswap_32(unsigned long x); +extern unsigned short __builtin_bswap_16(unsigned short x); +#endif + +/* + * avr32-linux-gcc versions earlier than 4.2 improperly sign-extends + * the result. + */ +#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2) +static inline __attribute_const__ __u16 __arch_swab16(__u16 val) +{ + return __builtin_bswap_16(val); +} +#define __arch_swab16 __arch_swab16 + +static inline __attribute_const__ __u32 __arch_swab32(__u32 val) +{ + return __builtin_bswap_32(val); +} +#define __arch_swab32 __arch_swab32 +#endif + +#endif /* __ASM_AVR32_SWAB_H */ |