1 files changed, 49 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/X86FxRestore.c b/Core/MdePkg/Library/BaseLib/X86FxRestore.c
new file mode 100644
index 0000000000..b2a02fe25f
--- /dev/null
+++ b/Core/MdePkg/Library/BaseLib/X86FxRestore.c
@@ -0,0 +1,49 @@
+/** @file
+  IA-32/x64 AsmFxRestore()
+
+  Copyright (c) 2006 - 2012, 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.
+
+**/
+
+
+
+
+#include "BaseLibInternals.h"
+
+/**
+  Restores the current floating point/SSE/SSE2 context from a buffer.
+
+  Restores the current floating point/SSE/SSE2 state from the buffer specified
+  by Buffer. Buffer must be aligned on a 16-byte boundary. This function is
+  only available on IA-32 and x64.
+
+  If Buffer is NULL, then ASSERT().
+  If Buffer is not aligned on a 16-byte boundary, then ASSERT().
+  If Buffer was not saved with AsmFxSave(), then ASSERT().
+
+  @param  Buffer  A pointer to a buffer to save the floating point/SSE/SSE2 context.
+
+**/
+VOID
+EFIAPI
+AsmFxRestore (
+  IN      CONST IA32_FX_BUFFER      *Buffer
+  )
+{
+  ASSERT (Buffer != NULL);
+  ASSERT (0 == ((UINTN)Buffer & 0xf));
+
+  //
+  // Check the flag recorded by AsmFxSave()
+  //
+  ASSERT (0xAA5555AA == *(UINT32 *) (&Buffer->Buffer[sizeof (Buffer->Buffer) - 4]));
+
+  InternalX86FxRestore (Buffer);
+}