1) Sync EdkCompatibilityPkg with EDK 1.04. The changes includes:

[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseMemoryLib / Ebc / CopyMem.c

diff --git a/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/Ebc/CopyMem.c b/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/Ebc/CopyMem.c
new file mode 100644 (file)
index 0000000..bd39f1f
--- /dev/null
+++ b/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/Ebc/CopyMem.c
@@ -0,0 +1,65 @@
+/*++\r
+\r
+Copyright (c) 2004 - 2006, Intel Corporation                                                         \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
+http://opensource.org/licenses/bsd-license.php                                            \r
+                                                                                          \r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.  \r
+\r
+\r
+Module Name:\r
+\r
+  CopyMem.c\r
+  \r
+Abstract: \r
+\r
+  Internal CopyMem\r
+\r
+--*/\r
+\r
+#include "BaseMemoryLibInternal.h"\r
+\r
+/**\r
+  Copy Length bytes from Source to Destination.\r
+\r
+  @param  Destination Target of copy\r
+  @param  Source Place to copy from\r
+  @param  Length Number of bytes to copy\r
+\r
+  @return Destination\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+InternalMemCopyMem (\r
+  OUT     VOID                      *Destination,\r
+  IN      CONST VOID                *Source,\r
+  IN      UINTN                     Length\r
+  )\r
+{\r
+  //\r
+  // Declare the local variables that actually move the data elements as\r
+  // volatile to prevent the optimizer from replacing this function with\r
+  // the intrinsic memcpy()\r
+  //\r
+  volatile UINT8                    *Destination8;\r
+  CONST UINT8                       *Source8;\r
+\r
+  if (Source > Destination) {\r
+    Destination8 = (UINT8*)Destination;\r
+    Source8 = (CONST UINT8*)Source;\r
+    while (Length-- != 0) {\r
+      *(Destination8++) = *(Source8++);\r
+    }\r
+  } else if (Source < Destination) {\r
+    Destination8 = (UINT8*)Destination + Length;\r
+    Source8 = (CONST UINT8*)Source + Length;\r
+    while (Length-- != 0) {\r
+      *(--Destination8) = *(--Source8);\r
+    }\r
+  }\r
+  return Destination;\r
+}\r