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#ifndef _BITS_BYTESWAP_H
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#define _BITS_BYTESWAP_H
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* Byte-order swapping functions
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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" : "=l" ( x ) : "l" ( x ) );
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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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static inline __attribute__ (( always_inline, const )) uint32_t
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__bswap_variable_32 ( uint32_t x ) {
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__asm__ ( "rev %0, %1" : "=l" ( x ) : "l" ( x ) );
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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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static inline __attribute__ (( always_inline, const )) uint64_t
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__bswap_variable_64 ( uint64_t x ) {
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uint32_t in_high = ( x >> 32 );
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uint32_t in_low = ( x & 0xffffffffUL );
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uint32_t out_high = __bswap_variable_32 ( in_low );
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uint32_t out_low = __bswap_variable_32 ( in_high );
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return ( ( ( ( uint64_t ) out_high ) << 32 ) |
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( ( uint64_t ) out_low ) );
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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 );