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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/x86FxSave.c
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: x86FxSave.c
17 #include "BaseLibInternals.h"
20 Save the current floating point/SSE/SSE2 context to a buffer.
22 Saves the current floating point/SSE/SSE2 state to the buffer specified by
23 Buffer. Buffer must be aligned on a 16-byte boundary. This function is only
24 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().
29 @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context.
35 OUT IA32_FX_BUFFER
*Buffer
38 ASSERT (Buffer
!= NULL
);
39 ASSERT (((UINTN
)Buffer
& 0xf) == 0);
41 InternalX86FxSave (Buffer
);
44 // Mark one flag at end of Buffer, it will be check by AsmFxRestor()
46 *(UINT32
*) (&Buffer
[sizeof (IA32_FX_BUFFER
) - 4]) = 0xAA5555AA;