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Annotation of /xvidcore/src/utils/emms.c

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1 : edgomez 1.3 /*****************************************************************************
2 :     *
3 :     * XVID MPEG-4 VIDEO CODEC
4 :     * - emms C wrapper -
5 :     *
6 : edgomez 1.5 * Copyright(C) 2002 Michael Militzer
7 :     *
8 : edgomez 1.3 * This program is an implementation of a part of one or more MPEG-4
9 :     * Video tools as specified in ISO/IEC 14496-2 standard. Those intending
10 :     * to use this software module in hardware or software products are
11 :     * advised that its use may infringe existing patents or copyrights, and
12 :     * any such use would be at such party's own risk. The original
13 :     * developer of this software module and his/her company, and subsequent
14 :     * editors and their companies, will have no liability for use of this
15 :     * software or modifications or derivatives thereof.
16 :     *
17 :     * This program is free software ; you can redistribute it and/or modify
18 :     * it under the terms of the GNU General Public License as published by
19 :     * the Free Software Foundation ; either version 2 of the License, or
20 :     * (at your option) any later version.
21 :     *
22 :     * This program is distributed in the hope that it will be useful,
23 :     * but WITHOUT ANY WARRANTY ; without even the implied warranty of
24 :     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 :     * GNU General Public License for more details.
26 :     *
27 :     * You should have received a copy of the GNU General Public License
28 :     * along with this program ; if not, write to the Free Software
29 :     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 :     *
31 :     ****************************************************************************/
32 :    
33 : Isibaar 1.1 #include "emms.h"
34 :     #include "../portab.h"
35 :    
36 : edgomez 1.3 /*****************************************************************************
37 :     * Library data, declared here
38 :     ****************************************************************************/
39 :    
40 : Isibaar 1.1 emmsFuncPtr emms;
41 : edgomez 1.3
42 :    
43 :     /*****************************************************************************
44 :     * emms functions
45 :     *
46 :     * emms functions are used to restored the fpu context after mmx operations
47 :     * because mmx and fpu share their registers/context (??? need to be confirmed)
48 :     *
49 :     ****************************************************************************/
50 :    
51 :     /* The no op wrapper for non MMX platforms */
52 : edgomez 1.2 void
53 :     emms_c()
54 :     {
55 :     }
56 :    
57 : edgomez 1.3 /* The real mmx emms wrapper */
58 : edgomez 1.2 void
59 :     emms_mmx()
60 :     {
61 : edgomez 1.3 /* the EMMS macro is defined according to the compiler in portab.h */
62 : edgomez 1.2 EMMS();
63 : edgomez 1.3
64 : edgomez 1.2 }

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