CodeReview for MdePkg/BaseMemoryXXX libraries. Refine file description, function comments and move some redundant logic.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6167 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseMemoryLibMmx/MemLibInternals.h

@@ -1,6 +1,16 @@
 /** @file
   Declaration of internal functions for Base Memory Library.
 
+  The following BaseMemoryLib instances contain the same copy of this file:
+    BaseMemoryLib
+    BaseMemoryLibMmx
+    BaseMemoryLibSse2
+    BaseMemoryLibRepStr
+    BaseMemoryLibOptDxe
+    BaseMemoryLibOptPei
+    PeiMemoryLib
+    DxeMemoryLib
+
   Copyright (c) 2006, Intel Corporation<BR>
   All rights reserved. This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -10,19 +20,6 @@
   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
-  Module Name:  MemLibInternals.h
-
-  The following BaseMemoryLib instances contain the same copy of this file:
-
-    BaseMemoryLib
-    BaseMemoryLibMmx
-    BaseMemoryLibSse2
-    BaseMemoryLibRepStr
-    BaseMemoryLibOptDxe
-    BaseMemoryLibOptPei
-    PeiMemoryLib
-    DxeMemoryLib
-
 **/
 
 #ifndef __MEM_LIB_INTERNALS__
@@ -147,7 +144,9 @@ InternalMemZeroMem (
   @param  Length            Length of DestinationBuffer and SourceBuffer memory
                             regions to compare. Must be non-zero.
 
-  @retval 0     if MemOne == MemTwo
+  @return 0                 All Length bytes of the two buffers are identical.
+  @retval Non-zero          The first mismatched byte in SourceBuffer subtracted from the first
+                            mismatched byte in DestinationBuffer.
 
 **/
 INTN