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  * clear_blocks_mmi() by BroadQ
  21  */
  22
  23 #include "../dsputil.h"
  24 #include "mmi.h"
  25
  26 void ff_mmi_idct_put(uint8_t *dest, int line_size, DCTELEM *block);
  27 void ff_mmi_idct_add(uint8_t *dest, int line_size, DCTELEM *block);
  28
  29
  30 static void clear_blocks_mmi(DCTELEM * blocks)
  31 {
  32         asm volatile(
  33         ".set noreorder    \n"
  34         "addiu $9, %0, 768 \n"
  35         "nop               \n"
  36         "1:                \n"
  37         "sq $0, 0(%0)      \n"
  38         "move $8, %0       \n"
  39         "addi %0, %0, 64   \n"
  40         "sq $0, 16($8)     \n"
  41         "slt $10, %0, $9   \n"
  42         "sq $0, 32($8)     \n"
  43         "bnez $10, 1b      \n"
  44         "sq $0, 48($8)     \n"
  45         ".set reorder      \n"
  46         : "+r" (blocks) ::  "$8", "$9", "memory" );
  47 }
  48
  49
  50 static void get_pixels_mmi(DCTELEM *block, const uint8_t *pixels, int line_size)
  51 {
  52     int i;
  53     for(i=0;i<8;i++) {
  54         asm volatile(
  55         ".set   push            \n\t"
  56         ".set   mips3           \n\t"
  57         "ld     $8, 0(%1)       \n\t"
  58         "add    %1, %1, %2      \n\t"
  59         "pextlb $8, $0, $8      \n\t"
  60         "sq     $8, 0(%0)       \n\t"
  61         ".set   pop             \n\t"
  62         :: "r" (block), "r" (pixels), "r" (line_size) : "$8", "memory" );
  63         block += 8;
  64     }
  65 }
  66
  67
  68 static void put_pixels8_mmi(uint8_t *block, const uint8_t *pixels, int line_size, int h)
  69 {
  70     int i;
  71     for(i=0; i<h; i++) {
  72         asm volatile(
  73         ".set   push            \n\t"
  74         ".set   mips3           \n\t"
  75         "ldr    $8, 0(%1)       \n\t"
  76         "ldl    $8, 7(%1)       \n\t"
  77         "add    %1, %1, %2      \n\t"
  78         "sd     $8, 0(%0)       \n\t"
  79         "add    %0, %0, %2      \n\t"
  80         ".set   pop             \n\t"
  81         :: "r" (block), "r" (pixels), "r" (line_size) : "$8", "memory" );
  82     }
  83 }
  84
  85
  86 static void put_pixels16_mmi(uint8_t *block, const uint8_t *pixels, int line_size, int h)
  87 {
  88     int i;
  89     for(i=0; i<(h>>2); i++) {
  90         asm volatile (
  91         ".set   push            \n\t"
  92         ".set   mips3           \n\t"
  93 #define PUTPIX16 \
  94         "ldr    $8, 0(%1)       \n\t" \
  95         "ldl    $8, 7(%1)       \n\t" \
  96         "ldr    $9, 8(%1)       \n\t" \
  97         "ldl    $9, 15(%1)      \n\t" \
  98         "add    %1, %1, %2      \n\t" \
  99         "pcpyld $8, $9, $8      \n\t" \
 100         "sq     $8, 0(%0)       \n\t" \
 101         "add    %0, %0, %2      \n\t"
 102         PUTPIX16
 103         PUTPIX16
 104         PUTPIX16
 105         PUTPIX16
 106         ".set   pop             \n\t"
 107         :: "r" (block), "r" (pixels), "r" (line_size) : "$8", "$9", "memory" );
 108     }
 109 }
 110
 111
 112 void dsputil_init_mmi(DSPContext* c, AVCodecContext *avctx)
 113 {
 114     const int idct_algo= avctx->idct_algo;
 115
 116     c->clear_blocks = clear_blocks_mmi;
 117
 118     c->put_pixels_tab[1][0] = put_pixels8_mmi;
 119     c->put_no_rnd_pixels_tab[1][0] = put_pixels8_mmi;
 120
 121     c->put_pixels_tab[0][0] = put_pixels16_mmi;
 122     c->put_no_rnd_pixels_tab[0][0] = put_pixels16_mmi;
 123
 124     c->get_pixels = get_pixels_mmi;
 125
 126     if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_PS2){
 127         c->idct_put= ff_mmi_idct_put;
 128         c->idct_add= ff_mmi_idct_add;
 129         c->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
 130     }
 131 }
 132