Fix the bug in x64 thunk code that it cannot handle the case when GDT is loaded in...

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / SwapBytes64.c

diff --git a/MdePkg/Library/BaseLib/Ia32/SwapBytes64.c b/MdePkg/Library/BaseLib/Ia32/SwapBytes64.c
index acd0b828418dacde83e46af67314afb625a526fe..c182f8599da657435e04c011ad18185ee2a1e235 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/SwapBytes64.c
+++ b/MdePkg/Library/BaseLib/Ia32/SwapBytes64.c
@@ -1,7 +1,7 @@
 /** @file\r
   Implementation of 64-bit swap bytes\r
 \r
-  Copyright (c) 2006, Intel Corporation<BR>\r
+  Copyright (c) 2006 - 2008, Intel Corporation<BR>\r
   All rights reserved. This program and the accompanying materials\r
   are licensed and made available under the terms and conditions of the BSD License\r
   which accompanies this distribution.  The full text of the license may be found at\r
@@ -12,8 +12,21 @@
 \r
 **/\r
 \r
-#if _MSC_EXTENSIONS\r
 \r
+\r
+\r
+/**\r
+  Switches the endianess of a 64-bit integer.\r
+\r
+  This function swaps the bytes in a 64-bit unsigned value to switch the value\r
+  from little endian to big endian or vice versa. The byte swapped value is\r
+  returned.\r
+\r
+  @param  Operand A 64-bit unsigned value.\r
+\r
+  @return The byte swaped Operand.\r
+\r
+**/\r
 UINT64\r
 EFIAPI\r
 InternalMathSwapBytes64 (\r
@@ -28,4 +41,3 @@ InternalMathSwapBytes64 (
   }\r
 }\r
 \r
-#endif\r