48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
#ifndef _BITS_BYTESWAP_H
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#define _BITS_BYTESWAP_H
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/** @file
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*
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* Byte-order swapping functions
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*
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*/
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#include <stdint.h>
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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static inline __attribute__ (( always_inline, const )) uint16_t
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__bswap_variable_16 ( uint16_t x ) {
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__asm__ ( "rev16 %0, %1" : "=r" ( x ) : "r" ( x ) );
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return x;
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}
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static inline __attribute__ (( always_inline )) void
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__bswap_16s ( uint16_t *x ) {
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*x = __bswap_variable_16 ( *x );
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}
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static inline __attribute__ (( always_inline, const )) uint32_t
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__bswap_variable_32 ( uint32_t x ) {
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__asm__ ( "rev32 %0, %1" : "=r" ( x ) : "r" ( x ) );
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return x;
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}
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static inline __attribute__ (( always_inline )) void
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__bswap_32s ( uint32_t *x ) {
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*x = __bswap_variable_32 ( *x );
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}
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static inline __attribute__ (( always_inline, const )) uint64_t
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__bswap_variable_64 ( uint64_t x ) {
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__asm__ ( "rev %0, %1" : "=r" ( x ) : "r" ( x ) );
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return x;
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}
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static inline __attribute__ (( always_inline )) void
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__bswap_64s ( uint64_t *x ) {
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*x = __bswap_variable_64 ( *x );
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}
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#endif
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