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91 lines
2.1 KiB
91 lines
2.1 KiB
#ifndef __BSWAP_H__ |
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#define __BSWAP_H__ |
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/* It's need for ffmpeg. Else where will be defined ARCH_X86?*/ |
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#include "config.h" |
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#ifdef HAVE_BYTESWAP_H |
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#include <byteswap.h> |
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#else |
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#include <inttypes.h> |
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#ifdef ARCH_X86 |
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inline static unsigned short ByteSwap16(unsigned short x) |
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{ |
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__asm("xchgb %b0,%h0" : |
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"=q" (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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inline static unsigned int ByteSwap32(unsigned int 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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"=q" (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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inline static unsigned long long int ByteSwap64(unsigned long long int x) |
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{ |
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register union { __extension__ unsigned long long int __ll; |
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unsigned long int __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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} |
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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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// code from bits/byteswap.h (C) 1997, 1998 Free Software Foundation, Inc. |
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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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#define bswap_64(x) \ |
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(__extension__ \ |
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({ union { __extension__ unsigned long long int __ll; \ |
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unsigned long int __l[2]; } __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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__r.__ll; })) |
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#endif /* !ARCH_X86 */ |
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#endif /* !HAVE_BYTESWAP_H */ |
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// be2me ... BigEndian to MachineEndian |
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// le2me ... LittleEndian to MachineEndian |
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#ifdef WORDS_BIGENDIAN |
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#define be2me_16(x) (x) |
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#define be2me_32(x) (x) |
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#define be2me_64(x) (x) |
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#define le2me_16(x) bswap_16(x) |
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#define le2me_32(x) bswap_32(x) |
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#define le2me_64(x) bswap_64(x) |
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#else |
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#define be2me_16(x) bswap_16(x) |
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#define be2me_32(x) bswap_32(x) |
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#define be2me_64(x) bswap_64(x) |
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#define le2me_16(x) (x) |
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#define le2me_32(x) (x) |
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#define le2me_64(x) (x) |
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#endif |
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#endif
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