From 5b39dc76f1bc82f941d5c800ab9f34407a06b53a Mon Sep 17 00:00:00 2001
From: Igor Pavlov <87184205+ip7z@users.noreply.github.com>
Date: Wed, 21 Jun 2023 00:00:00 +0000
Subject: 23.01

---
 C/XzCrc64.c | 32 +++++++++++++-------------------
 1 file changed, 13 insertions(+), 19 deletions(-)

(limited to 'C/XzCrc64.c')

diff --git a/C/XzCrc64.c b/C/XzCrc64.c
index b6d02cb..c2fad6c 100644
--- a/C/XzCrc64.c
+++ b/C/XzCrc64.c
@@ -1,5 +1,5 @@
 /* XzCrc64.c -- CRC64 calculation
-2017-05-23 : Igor Pavlov : Public domain */
+2023-04-02 : Igor Pavlov : Public domain */
 
 #include "Precomp.h"
 
@@ -12,39 +12,30 @@
   #define CRC64_NUM_TABLES 4
 #else
   #define CRC64_NUM_TABLES 5
-  #define CRC_UINT64_SWAP(v) \
-      ((v >> 56) \
-    | ((v >> 40) & ((UInt64)0xFF <<  8)) \
-    | ((v >> 24) & ((UInt64)0xFF << 16)) \
-    | ((v >>  8) & ((UInt64)0xFF << 24)) \
-    | ((v <<  8) & ((UInt64)0xFF << 32)) \
-    | ((v << 24) & ((UInt64)0xFF << 40)) \
-    | ((v << 40) & ((UInt64)0xFF << 48)) \
-    | ((v << 56)))
 
-  UInt64 MY_FAST_CALL XzCrc64UpdateT1_BeT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
+  UInt64 Z7_FASTCALL XzCrc64UpdateT1_BeT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
 #endif
 
 #ifndef MY_CPU_BE
-  UInt64 MY_FAST_CALL XzCrc64UpdateT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
+  UInt64 Z7_FASTCALL XzCrc64UpdateT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
 #endif
 
-typedef UInt64 (MY_FAST_CALL *CRC64_FUNC)(UInt64 v, const void *data, size_t size, const UInt64 *table);
+typedef UInt64 (Z7_FASTCALL *CRC64_FUNC)(UInt64 v, const void *data, size_t size, const UInt64 *table);
 
 static CRC64_FUNC g_Crc64Update;
 UInt64 g_Crc64Table[256 * CRC64_NUM_TABLES];
 
-UInt64 MY_FAST_CALL Crc64Update(UInt64 v, const void *data, size_t size)
+UInt64 Z7_FASTCALL Crc64Update(UInt64 v, const void *data, size_t size)
 {
   return g_Crc64Update(v, data, size, g_Crc64Table);
 }
 
-UInt64 MY_FAST_CALL Crc64Calc(const void *data, size_t size)
+UInt64 Z7_FASTCALL Crc64Calc(const void *data, size_t size)
 {
   return g_Crc64Update(CRC64_INIT_VAL, data, size, g_Crc64Table) ^ CRC64_INIT_VAL;
 }
 
-void MY_FAST_CALL Crc64GenerateTable()
+void Z7_FASTCALL Crc64GenerateTable(void)
 {
   UInt32 i;
   for (i = 0; i < 256; i++)
@@ -57,7 +48,7 @@ void MY_FAST_CALL Crc64GenerateTable()
   }
   for (i = 256; i < 256 * CRC64_NUM_TABLES; i++)
   {
-    UInt64 r = g_Crc64Table[(size_t)i - 256];
+    const UInt64 r = g_Crc64Table[(size_t)i - 256];
     g_Crc64Table[i] = g_Crc64Table[r & 0xFF] ^ (r >> 8);
   }
   
@@ -76,11 +67,14 @@ void MY_FAST_CALL Crc64GenerateTable()
     {
       for (i = 256 * CRC64_NUM_TABLES - 1; i >= 256; i--)
       {
-        UInt64 x = g_Crc64Table[(size_t)i - 256];
-        g_Crc64Table[i] = CRC_UINT64_SWAP(x);
+        const UInt64 x = g_Crc64Table[(size_t)i - 256];
+        g_Crc64Table[i] = Z7_BSWAP64(x);
       }
       g_Crc64Update = XzCrc64UpdateT1_BeT4;
     }
   }
   #endif
 }
+
+#undef kCrc64Poly
+#undef CRC64_NUM_TABLES
-- 
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