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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/x86FxRestore.c
2 IA-32/x64 AsmFxRestore()
4 Copyright (c) 2006, Intel Corporation<BR>
5 All rights reserved. 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
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.
13 Module Name: x86FxRestore.c
17 #include "BaseLibInternals.h"
20 Restores the current floating point/SSE/SSE2 context from a buffer.
22 Restores the current floating point/SSE/SSE2 state from the buffer specified
23 by Buffer. Buffer must be aligned on a 16-byte boundary. This function is
24 only available on IA-32 and X64.
26 If Buffer is NULL, then ASSERT().
27 If Buffer is not aligned on a 16-byte boundary, then ASSERT().
28 If Buffer was not saved with AsmFxSave(), then ASSERT().
30 @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context.
36 IN CONST IA32_FX_BUFFER
*Buffer
39 ASSERT (Buffer
!= NULL
);
40 ASSERT (((UINTN
)Buffer
& 0xf) == 0);
43 // Check the flag recorded by AsmFxSave()
45 ASSERT (*(UINT32
*) (&Buffer
[sizeof (IA32_FX_BUFFER
) - 4]) == 0xAA5555AA);
47 InternalX86FxRestore (Buffer
);