1 files changed, 28 insertions, 0 deletions
diff --git a/OldMdePkg/Library/BaseLib/Ipf/InterlockedCompareExchange64.s b/OldMdePkg/Library/BaseLib/Ipf/InterlockedCompareExchange64.s
new file mode 100644
index 0000000000..88b9d2b490
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+++ b/OldMdePkg/Library/BaseLib/Ipf/InterlockedCompareExchange64.s
@@ -0,0 +1,28 @@
+/// @file
+///   Contains an implementation of InterlockedCompareExchange64 on Itanium-
+///   based architecture.
+///
+/// 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:  InterlockedCompareExchange64.s
+///
+///
+
+.auto
+.text
+
+.proc   InternalSyncCompareExchange64
+.type   InternalSyncCompareExchange64, @function
+InternalSyncCompareExchange64::
+        mov                 ar.ccv = r33
+        cmpxchg8.rel        r8  = [r32], r34
+        mf
+        br.ret.sptk.many    b0
+.endp   InternalSyncCompareExchange64
+\ No newline at end of file