1 files changed, 36 insertions, 4 deletions
diff --git a/src/libs/7zip/unix/C/7zCrcOpt.c b/src/libs/7zip/unix/C/7zCrcOpt.c
index 6c766a209..ce132b5d4 100644
--- a/src/libs/7zip/unix/C/7zCrcOpt.c
+++ b/src/libs/7zip/unix/C/7zCrcOpt.c
@@ -1,12 +1,14 @@
-/* 7zCrcOpt.c -- CRC32 calculation : optimized version
-2009-11-23 : Igor Pavlov : Public domain */
+/* 7zCrcOpt.c -- CRC32 calculation
+2013-11-12 : Igor Pavlov : Public domain */
 
-#include "CpuArch.h"
+#include "Precomp.h"
 
-#ifdef MY_CPU_LE
+#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;
@@ -32,3 +34,33 @@ UInt32 MY_FAST_CALL CrcUpdateT8(UInt32 v, const void *data, size_t size, const U
 }
 
 #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