1/** @file
2  IA-32/x64 AsmFxRestore()
3
4  Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
5  This program and the accompanying materials
6  are licensed and made available under the terms and conditions of the BSD License
7  which accompanies this distribution.  The full text of the license may be found at
8  http://opensource.org/licenses/bsd-license.php.
9
10  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13**/
14
15
16
17
18#include "BaseLibInternals.h"
19
20/**
21  Restores the current floating point/SSE/SSE2 context from a buffer.
22
23  Restores the current floating point/SSE/SSE2 state from the buffer specified
24  by Buffer. Buffer must be aligned on a 16-byte boundary. This function is
25  only available on IA-32 and x64.
26
27  If Buffer is NULL, then ASSERT().
28  If Buffer is not aligned on a 16-byte boundary, then ASSERT().
29  If Buffer was not saved with AsmFxSave(), then ASSERT().
30
31  @param  Buffer  A pointer to a buffer to save the floating point/SSE/SSE2 context.
32
33**/
34VOID
35EFIAPI
36AsmFxRestore (
37  IN      CONST IA32_FX_BUFFER      *Buffer
38  )
39{
40  ASSERT (Buffer != NULL);
41  ASSERT (0 == ((UINTN)Buffer & 0xf));
42
43  //
44  // Check the flag recorded by AsmFxSave()
45  //
46  ASSERT (0xAA5555AA == *(UINT32 *) (&Buffer->Buffer[sizeof (Buffer->Buffer) - 4]));
47
48  InternalX86FxRestore (Buffer);
49}
50