Inline ASM in .c file is specific to MS tool-chain. Other tool-chain (such as Intel compiler) may not support it. Add in .asm files to make these function to be built by Assembler so that they are avaliable too for other tool-chain.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5529 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/MultU64x32.asm

@@ -0,0 +1,70 @@
+;/*++
+;
+;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:
+;
+;   MultU64x32.c
+;
+;Abstract:
+;
+;  64-bit Multiplication function for IA-32
+;
+;--*/
+;---------------------------------------------------------------------------
+    .686
+    .model  flat,C
+    .code
+
+;---------------------------------------------------------------------------
+
+;UINT64
+;MultU64x32 (
+;  IN UINT64   Multiplicand,
+;  IN UINTN    Multiplier
+;  )
+;/*++
+;
+;Routine Description:
+;
+;  This routine allows a 64 bit value to be multiplied with a 32 bit 
+;  value returns 64bit result.
+;  No checking if the result is greater than 64bits
+;
+;Arguments:
+;
+;  Multiplicand  - multiplicand
+;  Multiplier    - multiplier
+;
+;Returns:
+;
+;  Multiplicand * Multiplier
+;
+;--*/
+MultU64x32 PROC
+
+    mov    eax, [esp + 4]; dword ptr Multiplicand[0]
+    mul    dword ptr [esp + 0Ch] ; Multiplier
+    push   eax
+    push   edx
+    mov    eax, [esp + 10h]; dword ptr Multiplicand[4]
+    mul    dword ptr [esp + 14h]; Multiplier
+    ;
+    ; The value in edx stored by second multiplication overflows
+    ; the output and should be discarded. So here we overwrite it
+    ; with the edx value of first multiplication.
+    ;
+    pop    edx
+    add    edx, eax
+    pop    eax
+
+    ret
+MultU64x32 ENDP
+	END