1. Updated function headers in all assembly files.

2. Split x86LowLevel.c into a bunch of C files to make images linked with BaseLib smaller.
3. Fixed a few minor bugs.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1066 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseLib/Ia32/RShiftU64.asm

@@ -23,6 +23,14 @@
     .model  flat,C
     .code
 
+;------------------------------------------------------------------------------
+; UINT64
+; EFIAPI
+; InternalMathRShiftU64 (
+;   IN      UINT64                    Operand,
+;   IN      UINTN                     Count
+;   );
+;------------------------------------------------------------------------------
 InternalMathRShiftU64   PROC
     mov     cl, [esp + 12]
     xor     edx, edx
@@ -35,4 +43,4 @@ InternalMathRShiftU64   PROC
     ret
 InternalMathRShiftU64   ENDP
 
-    END
+    END