diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86FxRestore.c')
-rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86FxRestore.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86FxRestore.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86FxRestore.c new file mode 100644 index 0000000..3a9cd16 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86FxRestore.c @@ -0,0 +1,54 @@ +/*++ + +Copyright (c) 2004 - 2006, Intel Corporation +All rights reserved. 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. + + +Module Name: + + x86FxRestore.c + +Abstract: + + IA-32/x64 specific functions. + +--*/ + +#include "BaseLibInternal.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 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 (((UINTN)Buffer & 0xf) == 0); + + // + // Check the flag recorded by AsmFxSave() + // + ASSERT (*(UINT32 *) (&Buffer[sizeof (IA32_FX_BUFFER) - 4]) == 0xAA5555AA); + + InternalX86FxRestore (Buffer); +} |