github.com/afumu/libc@v0.0.6/musl/include/byteswap.h (about)

     1  #ifndef _BYTESWAP_H
     2  #define _BYTESWAP_H
     3  
     4  #include <features.h>
     5  #include <stdint.h>
     6  
     7  static __inline uint16_t __bswap_16(uint16_t __x)
     8  {
     9  	return __x<<8 | __x>>8;
    10  }
    11  
    12  static __inline uint32_t __bswap_32(uint32_t __x)
    13  {
    14  	return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
    15  }
    16  
    17  static __inline uint64_t __bswap_64(uint64_t __x)
    18  {
    19  	return __bswap_32(__x)+0ULL<<32 | __bswap_32(__x>>32);
    20  }
    21  
    22  #define bswap_16(x) __bswap_16(x)
    23  #define bswap_32(x) __bswap_32(x)
    24  #define bswap_64(x) __bswap_64(x)
    25  
    26  #endif