#ifndef __BSWAP_H__ #define __BSWAP_H__ #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef HAVE_BYTESWAP_H #include <byteswap.h> #else #include <inttypes.h> #ifdef ARCH_X86 inline static unsigned short ByteSwap16(unsigned short x) { __asm("xchgb %b0,%h0" : "=q" (x) : "0" (x)); return x; } #define bswap_16(x) ByteSwap16(x) inline static unsigned int ByteSwap32(unsigned int x) { #if __CPU__ > 386 __asm("bswap %0": "=r" (x) : #else __asm("xchgb %b0,%h0\n" " rorl $16,%0\n" " xchgb %b0,%h0": "=q" (x) : #endif "0" (x)); return x; } #define bswap_32(x) ByteSwap32(x) inline static unsigned long long int ByteSwap64(unsigned long long int x) { register union { __extension__ unsigned long long int __ll; unsigned long int __l[2]; } __x; asm("xchgl %0,%1": "=r"(__x.__l[0]),"=r"(__x.__l[1]): "0"(bswap_32((unsigned long)x)),"1"(bswap_32((unsigned long)(x>>32)))); return __x.__ll; } #define bswap_64(x) ByteSwap64(x) #else #define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8) // code from bits/byteswap.h (C) 1997, 1998 Free Software Foundation, Inc. #define bswap_32(x) \ ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) #define bswap_64(x) \ (__extension__ \ ({ union { __extension__ unsigned long long int __ll; \ unsigned long int __l[2]; } __w, __r; \ __w.__ll = (x); \ __r.__l[0] = bswap_32 (__w.__l[1]); \ __r.__l[1] = bswap_32 (__w.__l[0]); \ __r.__ll; })) #endif /* !ARCH_X86 */ #endif /* !HAVE_BYTESWAP_H */ // be2me ... BigEndian to MachineEndian // le2me ... LittleEndian to MachineEndian #ifdef WORDS_BIGENDIAN #define be2me_16(x) (x) #define be2me_32(x) (x) #define be2me_64(x) (x) #define le2me_16(x) bswap_16(x) #define le2me_32(x) bswap_32(x) #define le2me_64(x) bswap_64(x) #else #define be2me_16(x) bswap_16(x) #define be2me_32(x) bswap_32(x) #define be2me_64(x) bswap_64(x) #define le2me_16(x) (x) #define le2me_32(x) (x) #define le2me_64(x) (x) #endif #endif