ref: d66b628e7ce513210cf583e5a3d91e328267ba01
dir: /llt/utils.h/
#ifndef __UTILS_H_ #define __UTILS_H_ #if defined( __amd64__ ) || defined( _M_AMD64 ) # define ARCH_X86_64 # define __CPU__ 686 #elif defined( _M_IX86 )//msvs, intel, digital mars, watcom # if ! defined( __386__ ) # error "unsupported target: 16-bit x86" # endif # define ARCH_X86 # define __CPU__ ( _M_IX86 + 86 ) #elif defined( __i686__ )//gnu c # define ARCH_X86 # define __CPU__ 686 #elif defined( __i586__ )//gnu c # define ARCH_X86 # define __CPU__ 586 #elif defined( __i486__ )//gnu c # define ARCH_X86 # define __CPU__ 486 #elif defined( __i386__ )//gnu c # define ARCH_X86 # define __CPU__ 386 #else # error "unknown architecture" #endif char *uint2str(char *dest, size_t len, uint64_t num, uint32_t base); int str2int(char *str, size_t len, int64_t *res, uint32_t base); int isdigit_base(char c, int base); #ifdef ARCH_X86_64 # define LEGACY_REGS "=Q" #else # define LEGACY_REGS "=q" #endif #if !defined(__plan9__) && !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64)) STATIC_INLINE u_int16_t ByteSwap16(u_int16_t x) { __asm("xchgb %b0,%h0" : LEGACY_REGS (x) : "0" (x)); return x; } #define bswap_16(x) ByteSwap16(x) STATIC_INLINE u_int32_t ByteSwap32(u_int32_t x) { #if __CPU__ > 386 __asm("bswap %0": "=r" (x) : #else __asm("xchgb %b0,%h0\n"\ " rorl $16,%0\n" " xchgb %b0,%h0": LEGACY_REGS (x) : #endif "0" (x)); return x; } #define bswap_32(x) ByteSwap32(x) STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x) { #ifdef ARCH_X86_64 __asm("bswap %0": "=r" (x) : "0" (x)); return x; #else register union { __extension__ u_int64_t __ll; u_int32_t __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; #endif } #define bswap_64(x) ByteSwap64(x) #else #define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8) #ifdef __INTEL_COMPILER #define bswap_32(x) _bswap(x) #else #define bswap_32(x) \ ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) #endif STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x) { union { u_int64_t ll; u_int32_t l[2]; } w, r; w.ll = x; r.l[0] = bswap_32 (w.l[1]); r.l[1] = bswap_32 (w.l[0]); return r.ll; } #define bswap_64(x) ByteSwap64(x) #endif #endif