implify multitap core options

[pcsx_rearmed.git] / deps / lzma-16.04 / C / 7zCrcOpt.c

/* 7zCrcOpt.c -- CRC32 calculation\r
2015-03-01 : Igor Pavlov : Public domain */\r
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#include "Precomp.h"\r
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#include "CpuArch.h"\r
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#ifndef MY_CPU_BE\r
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#define CRC_UPDATE_BYTE_2(crc, b) (table[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))\r
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UInt32 MY_FAST_CALL CrcUpdateT4(UInt32 v, const void *data, size_t size, const UInt32 *table)\r
{\r
  const Byte *p = (const Byte *)data;\r
  for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2(v, *p);\r
  for (; size >= 4; size -= 4, p += 4)\r
  {\r
    v ^= *(const UInt32 *)p;\r
    v =\r
          table[0x300 + ((v      ) & 0xFF)]\r
        ^ table[0x200 + ((v >>  8) & 0xFF)]\r
        ^ table[0x100 + ((v >> 16) & 0xFF)]\r
        ^ table[0x000 + ((v >> 24))];\r
  }\r
  for (; size > 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2(v, *p);\r
  return v;\r
}\r
\r
UInt32 MY_FAST_CALL CrcUpdateT8(UInt32 v, const void *data, size_t size, const UInt32 *table)\r
{\r
  const Byte *p = (const Byte *)data;\r
  for (; size > 0 && ((unsigned)(ptrdiff_t)p & 7) != 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2(v, *p);\r
  for (; size >= 8; size -= 8, p += 8)\r
  {\r
    UInt32 d;\r
    v ^= *(const UInt32 *)p;\r
    v =\r
          table[0x700 + ((v      ) & 0xFF)]\r
        ^ table[0x600 + ((v >>  8) & 0xFF)]\r
        ^ table[0x500 + ((v >> 16) & 0xFF)]\r
        ^ table[0x400 + ((v >> 24))];\r
    d = *((const UInt32 *)p + 1);\r
    v ^=\r
          table[0x300 + ((d      ) & 0xFF)]\r
        ^ table[0x200 + ((d >>  8) & 0xFF)]\r
        ^ table[0x100 + ((d >> 16) & 0xFF)]\r
        ^ table[0x000 + ((d >> 24))];\r
  }\r
  for (; size > 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2(v, *p);\r
  return v;\r
}\r
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#endif\r
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#ifndef MY_CPU_LE\r
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#define CRC_UINT32_SWAP(v) ((v >> 24) | ((v >> 8) & 0xFF00) | ((v << 8) & 0xFF0000) | (v << 24))\r
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#define CRC_UPDATE_BYTE_2_BE(crc, b) (table[(((crc) >> 24) ^ (b))] ^ ((crc) << 8))\r
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UInt32 MY_FAST_CALL CrcUpdateT1_BeT4(UInt32 v, const void *data, size_t size, const UInt32 *table)\r
{\r
  const Byte *p = (const Byte *)data;\r
  table += 0x100;\r
  v = CRC_UINT32_SWAP(v);\r
  for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2_BE(v, *p);\r
  for (; size >= 4; size -= 4, p += 4)\r
  {\r
    v ^= *(const UInt32 *)p;\r
    v =\r
          table[0x000 + ((v      ) & 0xFF)]\r
        ^ table[0x100 + ((v >>  8) & 0xFF)]\r
        ^ table[0x200 + ((v >> 16) & 0xFF)]\r
        ^ table[0x300 + ((v >> 24))];\r
  }\r
  for (; size > 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2_BE(v, *p);\r
  return CRC_UINT32_SWAP(v);\r
}\r
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UInt32 MY_FAST_CALL CrcUpdateT1_BeT8(UInt32 v, const void *data, size_t size, const UInt32 *table)\r
{\r
  const Byte *p = (const Byte *)data;\r
  table += 0x100;\r
  v = CRC_UINT32_SWAP(v);\r
  for (; size > 0 && ((unsigned)(ptrdiff_t)p & 7) != 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2_BE(v, *p);\r
  for (; size >= 8; size -= 8, p += 8)\r
  {\r
    UInt32 d;\r
    v ^= *(const UInt32 *)p;\r
    v =\r
          table[0x400 + ((v      ) & 0xFF)]\r
        ^ table[0x500 + ((v >>  8) & 0xFF)]\r
        ^ table[0x600 + ((v >> 16) & 0xFF)]\r
        ^ table[0x700 + ((v >> 24))];\r
    d = *((const UInt32 *)p + 1);\r
    v ^=\r
          table[0x000 + ((d      ) & 0xFF)]\r
        ^ table[0x100 + ((d >>  8) & 0xFF)]\r
        ^ table[0x200 + ((d >> 16) & 0xFF)]\r
        ^ table[0x300 + ((d >> 24))];\r
  }\r
  for (; size > 0; size--, p++)\r
    v = CRC_UPDATE_BYTE_2_BE(v, *p);\r
  return CRC_UINT32_SWAP(v);\r
}\r
\r
#endif\r