1 files changed, 43 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.c b/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.c
new file mode 100644
index 0000000000..267fa3713e
--- /dev/null
+++ b/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.c
@@ -0,0 +1,43 @@
+/*++
+
+Copyright (c) 2004 - 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:
+
+  LShiftU64.c
+  
+Abstract: 
+
+  
+
+--*/
+
+#include "BaseLibInternals.h"
+
+UINT64
+EFIAPI
+InternalMathLShiftU64 (
+  IN      UINT64                    Operand,
+  IN      UINTN                     Count
+  )
+{
+  _asm {
+    mov     cl, byte ptr [Count]
+    xor     eax, eax
+    mov     edx, dword ptr [Operand + 0]
+    test    cl, 32                      // Count >= 32?
+    cmovz   eax, edx
+    cmovz   edx, dword ptr [Operand + 4]
+    shld    edx, eax, cl
+    shl     eax, cl
+  }
+}
+