Add in the 1st version of ECP.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2832 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/Power10U64.c

@@ -0,0 +1,67 @@
+/*++
+
+Copyright (c) 2006, Intel Corporation                                                         
+All rights reserved. This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+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:
+
+  Power10U64.c
+
+Abstract:
+
+  Calculates Operand * 10 ^ Power
+
+--*/
+
+#include "Tiano.h"
+
+UINT64
+MultU64x32 (
+  IN UINT64   Multiplicand,
+  IN UINTN    Multiplier
+  );
+
+UINT64
+Power10U64 (
+  IN UINT64   Operand,
+  IN UINTN    Power
+  )
+/*++
+
+Routine Description:
+
+  Raise 10 to the power of Power, and multiply the result with Operand
+
+Arguments:
+
+  Operand  - multiplicand
+  Power    - power
+
+Returns:
+
+  Operand * 10 ^ Power
+
+--*/
+{
+  __asm {
+  mov    ecx, Power
+  jcxz   _Power10U64_Done
+  
+_Power10U64_Wend:
+  push   10
+  push   dword ptr Operand[4]
+  push   dword ptr Operand[0]
+  call   MultU64x32
+  mov    dword ptr Operand[0], eax
+  mov    dword ptr Operand[4], edx
+  loop   _Power10U64_Wend
+
+_Power10U64_Done:
+  }
+}