1 #ifndef ETHERBOOT_BYTESWAP_H 2 #define ETHERBOOT_BYTESWAP_H 3 4 FILE_LICENCE ( GPL2_OR_LATER ); 5 6 #include "endian.h" 7 #include "bits/byteswap.h" 8 9 #define __bswap_constant_16(x) \ 10 ((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \ 11 (((uint16_t)(x) & 0xff00) >> 8))) 12 13 #define __bswap_constant_32(x) \ 14 ((uint32_t)((((uint32_t)(x) & 0x000000ffU) << 24) | \ 15 (((uint32_t)(x) & 0x0000ff00U) << 8) | \ 16 (((uint32_t)(x) & 0x00ff0000U) >> 8) | \ 17 (((uint32_t)(x) & 0xff000000U) >> 24))) 18 19 #define __bswap_constant_64(x) \ 20 ((uint64_t)((((uint64_t)(x) & 0x00000000000000ffULL) << 56) | \ 21 (((uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \ 22 (((uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \ 23 (((uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \ 24 (((uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \ 25 (((uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \ 26 (((uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \ 27 (((uint64_t)(x) & 0xff00000000000000ULL) >> 56))) 28 29 #define __bswap_16(x) \ 30 ((uint16_t)(__builtin_constant_p(x) ? \ 31 __bswap_constant_16(x) : \ 32 __bswap_variable_16(x))) 33 34 #define __bswap_32(x) \ 35 ((uint32_t)(__builtin_constant_p(x) ? \ 36 __bswap_constant_32(x) : \ 37 __bswap_variable_32(x))) 38 39 #define __bswap_64(x) \ 40 ((uint64_t)(__builtin_constant_p(x) ? \ 41 __bswap_constant_64(x) : \ 42 __bswap_variable_64(x))) 43 44 #if __BYTE_ORDER == __LITTLE_ENDIAN 45 #include "little_bswap.h" 46 #endif 47 #if __BYTE_ORDER == __BIG_ENDIAN 48 #include "big_bswap.h" 49 #endif 50 51 /* Make routines available to all */ 52 #define swap64(x) __bswap_64(x) 53 #define swap32(x) __bswap_32(x) 54 #define swap16(x) __bswap_16(x) 55 #define bswap_64(x) __bswap_64(x) 56 #define bswap_32(x) __bswap_32(x) 57 #define bswap_16(x) __bswap_16(x) 58 59 #endif /* ETHERBOOT_BYTESWAP_H */ 60
