diff options
Diffstat (limited to 'src/arch/loong64/include/bits/byteswap.h')
-rw-r--r-- | src/arch/loong64/include/bits/byteswap.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/arch/loong64/include/bits/byteswap.h b/src/arch/loong64/include/bits/byteswap.h new file mode 100644 index 00000000..1e22d094 --- /dev/null +++ b/src/arch/loong64/include/bits/byteswap.h @@ -0,0 +1,47 @@ +#ifndef _BITS_BYTESWAP_H +#define _BITS_BYTESWAP_H + +/** @file + * + * Byte-order swapping functions + * + */ + +#include <stdint.h> + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +static inline __attribute__ (( always_inline, const )) uint16_t +__bswap_variable_16 ( uint16_t x ) { + __asm__ ( "revb.2h %0, %1" : "=r" ( x ) : "r" ( x ) ); + return x; +} + +static inline __attribute__ (( always_inline )) void +__bswap_16s ( uint16_t *x ) { + *x = __bswap_variable_16 ( *x ); +} + +static inline __attribute__ (( always_inline, const )) uint32_t +__bswap_variable_32 ( uint32_t x ) { + __asm__ ( "revb.2w %0, %1" : "=r" ( x ) : "r" ( x ) ); + return x; +} + +static inline __attribute__ (( always_inline )) void +__bswap_32s ( uint32_t *x ) { + *x = __bswap_variable_32 ( *x ); +} + +static inline __attribute__ (( always_inline, const )) uint64_t +__bswap_variable_64 ( uint64_t x ) { + __asm__ ( "revb.d %0, %1" : "=r" ( x ) : "r" ( x ) ); + return x; +} + +static inline __attribute__ (( always_inline )) void +__bswap_64s ( uint64_t *x ) { + *x = __bswap_variable_64 ( *x ); +} + +#endif |