libavcodec/ps2/dsputil_mmi.c

   1 /*
   2  * MMI optimized DSP utils
   3  * Copyright (c) 2000, 2001 Fabrice Bellard.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  * MMI optimization by Leon van Stuivenberg <leonvs@iae.nl>
  20  */
  21
  22 #include "../dsputil.h"
  23
  24 void ff_mmi_idct(DCTELEM * block);
  25
  26 #include "mmi.h"
  27
  28
  29 static void clear_blocks_mmi(DCTELEM * blocks)
  30 {
  31     /* $4 = blocks */
  32     int i;
  33     for (i = 0; i < 6; i++) {
  34         sq($0, 0, $4);
  35         sq($0, 16, $4);
  36         sq($0, 32, $4);
  37         sq($0, 48, $4);
  38         sq($0, 64, $4);
  39         sq($0, 80, $4);
  40         sq($0, 96, $4);
  41         sq($0, 112, $4);
  42         __asm__ __volatile__("addi $4, $4, 128");
  43     }
  44 }
  45
  46
  47 static void put_pixels_clamped_mmi(const DCTELEM * block, UINT8 * pixels,
  48                                    int line_size)
  49 {
  50     /* $4 = block, $5 = pixels, $6 = line_size */
  51     __asm__ __volatile__("li $11, 255":::"$11");
  52     lq($4, 0, $12);
  53     pcpyld($11, $11, $11);
  54     pcpyh($11, $11);
  55
  56 #define PUT(rs) \
  57     ppacb($0, $##rs, $##rs); \
  58     sd3(rs, 0, 5); \
  59     __asm__ __volatile__ ("add $5, $5, $6");
  60
  61     pminh($12, $11, $12);
  62     pmaxh($12, $0, $12);
  63     lq($4, 16, $13);
  64     PUT(12);
  65
  66     pminh($13, $11, $13);
  67     pmaxh($13, $0, $13);
  68     lq($4, 32, $12);
  69     PUT(13);
  70
  71     pminh($12, $11, $12);
  72     pmaxh($12, $0, $12);
  73     lq($4, 48, $13);
  74     PUT(12);
  75
  76     pminh($13, $11, $13);
  77     pmaxh($13, $0, $13);
  78     lq($4, 64, $12);
  79     PUT(13);
  80
  81     pminh($12, $11, $12);
  82     pmaxh($12, $0, $12);
  83     lq($4, 80, $13);
  84     PUT(12);
  85
  86     pminh($13, $11, $13);
  87     pmaxh($13, $0, $13);
  88     lq($4, 96, $12);
  89     PUT(13);
  90
  91     pminh($12, $11, $12);
  92     pmaxh($12, $0, $12);
  93     lq($4, 112, $13);
  94     PUT(12);
  95
  96     pminh($13, $11, $13);
  97     pmaxh($13, $0, $13);
  98     PUT(13);
  99 }
 100
 101 /* todo
 102 static void add_pixels_clamped_mmi(const DCTELEM * block, UINT8 * pixels,
 103                                    int line_size)
 104 {
 105 }
 106 */
 107
 108
 109 void dsputil_init_mmi(void)
 110 {
 111     put_pixels_clamped = put_pixels_clamped_mmi;
 112     //add_pixels_clamped = add_pixels_clamped_mmi;
 113     clear_blocks = clear_blocks_mmi;
 114     ff_idct = ff_mmi_idct;
 115 }