diff options
Diffstat (limited to 'src/lib/lib7z/7zCrcOpt.c')
-rw-r--r-- | src/lib/lib7z/7zCrcOpt.c | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/src/lib/lib7z/7zCrcOpt.c b/src/lib/lib7z/7zCrcOpt.c deleted file mode 100644 index db72778281b..00000000000 --- a/src/lib/lib7z/7zCrcOpt.c +++ /dev/null @@ -1,64 +0,0 @@ -/* 7zCrcOpt.c -- CRC32 calculation -2010-12-01 : Igor Pavlov : Public domain */ - -#include "CpuArch.h" - -#define CRC_UPDATE_BYTE_2(crc, b) (table[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8)) - -#ifndef MY_CPU_BE - -UInt32 MY_FAST_CALL CrcUpdateT4(UInt32 v, const void *data, size_t size, const UInt32 *table) -{ - const Byte *p = (const Byte *)data; - for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - for (; size >= 4; size -= 4, p += 4) - { - v ^= *(const UInt32 *)p; - v = - table[0x300 + (v & 0xFF)] ^ - table[0x200 + ((v >> 8) & 0xFF)] ^ - table[0x100 + ((v >> 16) & 0xFF)] ^ - table[0x000 + ((v >> 24))]; - } - for (; size > 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - return v; -} - -UInt32 MY_FAST_CALL CrcUpdateT8(UInt32 v, const void *data, size_t size, const UInt32 *table) -{ - return CrcUpdateT4(v, data, size, table); -} - -#endif - - -#ifndef MY_CPU_LE - -#define CRC_UINT32_SWAP(v) ((v >> 24) | ((v >> 8) & 0xFF00) | ((v << 8) & 0xFF0000) | (v << 24)) - -UInt32 MY_FAST_CALL CrcUpdateT1_BeT4(UInt32 v, const void *data, size_t size, const UInt32 *table) -{ - const Byte *p = (const Byte *)data; - for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - v = CRC_UINT32_SWAP(v); - table += 0x100; - for (; size >= 4; size -= 4, p += 4) - { - v ^= *(const UInt32 *)p; - v = - table[0x000 + (v & 0xFF)] ^ - table[0x100 + ((v >> 8) & 0xFF)] ^ - table[0x200 + ((v >> 16) & 0xFF)] ^ - table[0x300 + ((v >> 24))]; - } - table -= 0x100; - v = CRC_UINT32_SWAP(v); - for (; size > 0; size--, p++) - v = CRC_UPDATE_BYTE_2(v, *p); - return v; -} - -#endif |