1 /** @file
2   AsmReadMm0 function
3 
4   Copyright (c) 2006 - 2008, 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 /**
19   Reads the current value of 64-bit MMX Register #0 (MM0).
20 
21   Reads and returns the current value of MM0. This function is only available
22   on IA-32 and x64.
23 
24   @return The current value of MM0.
25 
26 **/
27 UINT64
28 EFIAPI
AsmReadMm0(VOID)29 AsmReadMm0 (
30   VOID
31   )
32 {
33   _asm {
34     push    eax
35     push    eax
36     movq    [esp], mm0
37     pop     eax
38     pop     edx
39     emms
40   }
41 }
42 
43