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/LShiftU64.asm

@@ -23,11 +23,19 @@
     .model  flat,C
     .code
 
+;------------------------------------------------------------------------------
+; UINT64
+; EFIAPI
+; InternalMathLShiftU64 (
+;   IN      UINT64                    Operand,
+;   IN      UINTN                     Count
+;   );
+;------------------------------------------------------------------------------
 InternalMathLShiftU64   PROC
     mov     cl, [esp + 12]
     xor     eax, eax
     mov     edx, [esp + 4]
-    test    cl, 32
+    test    cl, 32                      ; Count >= 32?
     cmovz   eax, edx
     cmovz   edx, [esp + 8]
     shld    edx, eax, cl