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

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