Code Scrub for MdePkg.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5567 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseLib/Ia32/RRotU64.c

@@ -17,6 +17,20 @@
 //
 
 
+/**
+  Rotates a 64-bit integer right between 0 and 63 bits, filling
+  the high bits with the high low bits that were rotated.
+
+  This function rotates the 64-bit value Operand to the right by Count bits.
+  The high Count bits are fill with the low Count bits of Operand. The rotated
+  value is returned.
+
+  @param  Operand The 64-bit operand to rotate right.
+  @param  Count   The number of bits to rotate right.
+
+  @return Operand >>> Count
+
+**/
 UINT64
 EFIAPI
 InternalMathRRotU64 (