/* * Copyright (c) 2010 Espressif System */ #ifndef BYTESWAP_H #define BYTESWAP_H #include <machine/endian.h> /* Swap bytes in 16 bit value. */ #ifndef __bswap_16 #ifdef __GNUC__ # define __bswap_16(x) \ (__extension__ \ ({ unsigned short int __bsx = (x); \ ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8)); })) #else static INLINE unsigned short int __bswap_16 (unsigned short int __bsx) { return ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8)); } #endif #endif // __bswap_16 /* Swap bytes in 32 bit value. */ #ifndef __bswap_32 #ifdef __GNUC__ # define __bswap_32(x) \ (__extension__ \ ({ unsigned int __bsx = (x); \ ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) | \ (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24)); })) #else static INLINE unsigned int __bswap_32 (unsigned int __bsx) { return ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) | (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24)); } #endif #endif // __bswap_32 #ifndef __bswap_64 #if defined __GNUC__ && __GNUC__ >= 2 /* Swap bytes in 64 bit value. */ # define __bswap_constant_64(x) \ ((((x) & 0xff00000000000000ull) >> 56) \ | (((x) & 0x00ff000000000000ull) >> 40) \ | (((x) & 0x0000ff0000000000ull) >> 24) \ | (((x) & 0x000000ff00000000ull) >> 8) \ | (((x) & 0x00000000ff000000ull) << 8) \ | (((x) & 0x0000000000ff0000ull) << 24) \ | (((x) & 0x000000000000ff00ull) << 40) \ | (((x) & 0x00000000000000ffull) << 56)) # define __bswap_64(x) \ (__extension__ \ ({ union { __extension__ unsigned long long int __ll; \ unsigned int __l[2]; } __w, __r; \ if (__builtin_constant_p (x)) \ __r.__ll = __bswap_constant_64 (x); \ else \ { \ __w.__ll = (x); \ __r.__l[0] = __bswap_32 (__w.__l[1]); \ __r.__l[1] = __bswap_32 (__w.__l[0]); \ } \ __r.__ll; })) #endif #endif // __bswap_64 #endif /* BYTESWAP_H */