114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
#ifndef __UTILS_H_
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#define __UTILS_H_
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#if defined( __amd64__ ) || defined( _M_AMD64 )
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# define ARCH_X86_64
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# define __CPU__ 686
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#elif defined( _M_IX86 )//msvs, intel, digital mars, watcom
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# if ! defined( __386__ )
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# error "unsupported target: 16-bit x86"
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# endif
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# define ARCH_X86
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# define __CPU__ ( _M_IX86 + 86 )
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#elif defined( __i686__ )//gnu c
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# define ARCH_X86
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# define __CPU__ 686
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#elif defined( __i586__ )//gnu c
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# define ARCH_X86
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# define __CPU__ 586
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#elif defined( __i486__ )//gnu c
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# define ARCH_X86
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# define __CPU__ 486
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#elif defined( __i386__ )//gnu c
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# define ARCH_X86
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# define __CPU__ 386
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#else
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# error "unknown architecture"
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#endif
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char *uint2str(char *dest, size_t len, uint64_t num, uint32_t base);
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int str2int(char *str, size_t len, int64_t *res, uint32_t base);
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int isdigit_base(char c, int base);
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#ifdef ARCH_X86_64
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# define LEGACY_REGS "=Q"
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#else
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# define LEGACY_REGS "=q"
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#endif
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#if !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64))
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STATIC_INLINE u_int16_t ByteSwap16(u_int16_t x)
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{
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__asm("xchgb %b0,%h0" :
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LEGACY_REGS (x) :
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"0" (x));
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return x;
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}
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#define bswap_16(x) ByteSwap16(x)
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STATIC_INLINE u_int32_t ByteSwap32(u_int32_t x)
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{
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#if __CPU__ > 386
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__asm("bswap %0":
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"=r" (x) :
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#else
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__asm("xchgb %b0,%h0\n"\
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" rorl $16,%0\n"
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" xchgb %b0,%h0":
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LEGACY_REGS (x) :
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#endif
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"0" (x));
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return x;
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}
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#define bswap_32(x) ByteSwap32(x)
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STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
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{
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#ifdef ARCH_X86_64
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__asm("bswap %0":
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"=r" (x) :
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"0" (x));
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return x;
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#else
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register union { __extension__ u_int64_t __ll;
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u_int32_t __l[2]; } __x;
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asm("xchgl %0,%1":
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"=r"(__x.__l[0]),"=r"(__x.__l[1]):
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"0"(bswap_32((unsigned long)x)),"1"(bswap_32((unsigned long)(x>>32))));
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return __x.__ll;
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#endif
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}
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#define bswap_64(x) ByteSwap64(x)
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#else
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#define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8)
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#ifdef __INTEL_COMPILER
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#define bswap_32(x) _bswap(x)
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#else
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#define bswap_32(x) \
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((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
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(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
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#endif
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STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
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{
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union {
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u_int64_t ll;
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u_int32_t l[2];
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} w, r;
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w.ll = x;
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r.l[0] = bswap_32 (w.l[1]);
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r.l[1] = bswap_32 (w.l[0]);
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return r.ll;
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}
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#define bswap_64(x) ByteSwap64(x)
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#endif
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#endif
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