1 files changed, 38 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/Ia32/WriteMm7.c b/Core/MdePkg/Library/BaseLib/Ia32/WriteMm7.c
new file mode 100644
index 0000000000..f6b9d1ceab
--- /dev/null
+++ b/Core/MdePkg/Library/BaseLib/Ia32/WriteMm7.c
@@ -0,0 +1,38 @@
+/** @file
+  AsmWriteMm7 function
+
+  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  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.
+
+**/
+
+
+
+
+/**
+  Writes the current value of 64-bit MMX Register #7 (MM7).
+
+  Writes the current value of MM7. This function is only available on IA32 and
+  x64.
+
+  @param  Value The 64-bit value to write to MM7.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm7 (
+  IN UINT64   Value
+  )
+{
+  _asm {
+    movq    mm7, qword ptr [Value]
+    emms
+  }
+}
+