libavcodec/arm/dsputil_iwmmxt.c

   1 /*
   2  * iWMMXt optimized DSP utils
   3  * Copyright (c) 2004 AGAWA Koji
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavcodec/dsputil.h"
  23
  24 #define DEF(x, y) x ## _no_rnd_ ## y ##_iwmmxt
  25 #define SET_RND(regd)  __asm__ volatile ("mov r12, #1 \n\t tbcsth " #regd ", r12":::"r12");
  26 #define WAVG2B "wavg2b"
  27 #include "dsputil_iwmmxt_rnd_template.c"
  28 #undef DEF
  29 #undef SET_RND
  30 #undef WAVG2B
  31
  32 #define DEF(x, y) x ## _ ## y ##_iwmmxt
  33 #define SET_RND(regd)  __asm__ volatile ("mov r12, #2 \n\t tbcsth " #regd ", r12":::"r12");
  34 #define WAVG2B "wavg2br"
  35 #include "dsputil_iwmmxt_rnd_template.c"
  36 #undef DEF
  37 #undef SET_RND
  38 #undef WAVG2BR
  39
  40 // need scheduling
  41 #define OP(AVG)                                         \
  42     __asm__ volatile (                                      \
  43         /* alignment */                                 \
  44         "and r12, %[pixels], #7 \n\t"                   \
  45         "bic %[pixels], %[pixels], #7 \n\t"             \
  46         "tmcr wcgr1, r12 \n\t"                          \
  47                                                         \
  48         "wldrd wr0, [%[pixels]] \n\t"                   \
  49         "wldrd wr1, [%[pixels], #8] \n\t"               \
  50         "add %[pixels], %[pixels], %[line_size] \n\t"   \
  51         "walignr1 wr4, wr0, wr1 \n\t"                   \
  52                                                         \
  53         "1: \n\t"                                       \
  54                                                         \
  55         "wldrd wr2, [%[pixels]] \n\t"                   \
  56         "wldrd wr3, [%[pixels], #8] \n\t"               \
  57         "add %[pixels], %[pixels], %[line_size] \n\t"   \
  58         "pld [%[pixels]] \n\t"                          \
  59         "walignr1 wr5, wr2, wr3 \n\t"                   \
  60         AVG " wr6, wr4, wr5 \n\t"                       \
  61         "wstrd wr6, [%[block]] \n\t"                    \
  62         "add %[block], %[block], %[line_size] \n\t"     \
  63                                                         \
  64         "wldrd wr0, [%[pixels]] \n\t"                   \
  65         "wldrd wr1, [%[pixels], #8] \n\t"               \
  66         "add %[pixels], %[pixels], %[line_size] \n\t"   \
  67         "walignr1 wr4, wr0, wr1 \n\t"                   \
  68         "pld [%[pixels]] \n\t"                          \
  69         AVG " wr6, wr4, wr5 \n\t"                       \
  70         "wstrd wr6, [%[block]] \n\t"                    \
  71         "add %[block], %[block], %[line_size] \n\t"     \
  72                                                         \
  73         "subs %[h], %[h], #2 \n\t"                      \
  74         "bne 1b \n\t"                                   \
  75         : [block]"+r"(block), [pixels]"+r"(pixels), [h]"+r"(h)  \
  76         : [line_size]"r"(line_size) \
  77         : "memory", "r12");
  78 void put_pixels8_y2_iwmmxt(uint8_t *block, const uint8_t *pixels, const int line_size, int h)
  79 {
  80     OP("wavg2br");
  81 }
  82 void put_no_rnd_pixels8_y2_iwmmxt(uint8_t *block, const uint8_t *pixels, const int line_size, int h)
  83 {
  84     OP("wavg2b");
  85 }
  86 #undef OP
  87
  88 void add_pixels_clamped_iwmmxt(const DCTELEM *block, uint8_t *pixels, int line_size)
  89 {
  90     uint8_t *pixels2 = pixels + line_size;
  91
  92     __asm__ volatile (
  93         "mov            r12, #4                 \n\t"
  94         "1:                                     \n\t"
  95         "pld            [%[pixels], %[line_size2]]              \n\t"
  96         "pld            [%[pixels2], %[line_size2]]             \n\t"
  97         "wldrd          wr4, [%[pixels]]        \n\t"
  98         "wldrd          wr5, [%[pixels2]]       \n\t"
  99         "pld            [%[block], #32]         \n\t"
 100         "wunpckelub     wr6, wr4                \n\t"
 101         "wldrd          wr0, [%[block]]         \n\t"
 102         "wunpckehub     wr7, wr4                \n\t"
 103         "wldrd          wr1, [%[block], #8]     \n\t"
 104         "wunpckelub     wr8, wr5                \n\t"
 105         "wldrd          wr2, [%[block], #16]    \n\t"
 106         "wunpckehub     wr9, wr5                \n\t"
 107         "wldrd          wr3, [%[block], #24]    \n\t"
 108         "add            %[block], %[block], #32 \n\t"
 109         "waddhss        wr10, wr0, wr6          \n\t"
 110         "waddhss        wr11, wr1, wr7          \n\t"
 111         "waddhss        wr12, wr2, wr8          \n\t"
 112         "waddhss        wr13, wr3, wr9          \n\t"
 113         "wpackhus       wr14, wr10, wr11        \n\t"
 114         "wpackhus       wr15, wr12, wr13        \n\t"
 115         "wstrd          wr14, [%[pixels]]       \n\t"
 116         "add            %[pixels], %[pixels], %[line_size2]     \n\t"
 117         "subs           r12, r12, #1            \n\t"
 118         "wstrd          wr15, [%[pixels2]]      \n\t"
 119         "add            %[pixels2], %[pixels2], %[line_size2]   \n\t"
 120         "bne            1b                      \n\t"
 121         : [block]"+r"(block), [pixels]"+r"(pixels), [pixels2]"+r"(pixels2)
 122         : [line_size2]"r"(line_size << 1)
 123         : "cc", "memory", "r12");
 124 }
 125
 126 static void clear_blocks_iwmmxt(DCTELEM *blocks)
 127 {
 128     __asm__ volatile(
 129                 "wzero wr0                      \n\t"
 130                 "mov r1, #(128 * 6 / 32)        \n\t"
 131                 "1:                             \n\t"
 132                 "wstrd wr0, [%0]                \n\t"
 133                 "wstrd wr0, [%0, #8]            \n\t"
 134                 "wstrd wr0, [%0, #16]           \n\t"
 135                 "wstrd wr0, [%0, #24]           \n\t"
 136                 "subs r1, r1, #1                \n\t"
 137                 "add %0, %0, #32                \n\t"
 138                 "bne 1b                         \n\t"
 139                 : "+r"(blocks)
 140                 :
 141                 : "r1"
 142         );
 143 }
 144
 145 static void nop(uint8_t *block, const uint8_t *pixels, int line_size, int h)
 146 {
 147     return;
 148 }
 149
 150 /* A run time test is not simple. If this file is compiled in
 151  * then we should install the functions
 152  */
 153 int mm_flags = FF_MM_IWMMXT; /* multimedia extension flags */
 154
 155 void dsputil_init_iwmmxt(DSPContext* c, AVCodecContext *avctx)
 156 {
 157     if (avctx->dsp_mask) {
 158         if (avctx->dsp_mask & FF_MM_FORCE)
 159             mm_flags |= (avctx->dsp_mask & 0xffff);
 160         else
 161             mm_flags &= ~(avctx->dsp_mask & 0xffff);
 162     }
 163
 164     if (!(mm_flags & FF_MM_IWMMXT)) return;
 165
 166     c->add_pixels_clamped = add_pixels_clamped_iwmmxt;
 167
 168     c->clear_blocks = clear_blocks_iwmmxt;
 169
 170     c->put_pixels_tab[0][0] = put_pixels16_iwmmxt;
 171     c->put_pixels_tab[0][1] = put_pixels16_x2_iwmmxt;
 172     c->put_pixels_tab[0][2] = put_pixels16_y2_iwmmxt;
 173     c->put_pixels_tab[0][3] = put_pixels16_xy2_iwmmxt;
 174     c->put_no_rnd_pixels_tab[0][0] = put_pixels16_iwmmxt;
 175     c->put_no_rnd_pixels_tab[0][1] = put_no_rnd_pixels16_x2_iwmmxt;
 176     c->put_no_rnd_pixels_tab[0][2] = put_no_rnd_pixels16_y2_iwmmxt;
 177     c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_iwmmxt;
 178
 179     c->put_pixels_tab[1][0] = put_pixels8_iwmmxt;
 180     c->put_pixels_tab[1][1] = put_pixels8_x2_iwmmxt;
 181     c->put_pixels_tab[1][2] = put_pixels8_y2_iwmmxt;
 182     c->put_pixels_tab[1][3] = put_pixels8_xy2_iwmmxt;
 183     c->put_no_rnd_pixels_tab[1][0] = put_pixels8_iwmmxt;
 184     c->put_no_rnd_pixels_tab[1][1] = put_no_rnd_pixels8_x2_iwmmxt;
 185     c->put_no_rnd_pixels_tab[1][2] = put_no_rnd_pixels8_y2_iwmmxt;
 186     c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_iwmmxt;
 187
 188     c->avg_pixels_tab[0][0] = avg_pixels16_iwmmxt;
 189     c->avg_pixels_tab[0][1] = avg_pixels16_x2_iwmmxt;
 190     c->avg_pixels_tab[0][2] = avg_pixels16_y2_iwmmxt;
 191     c->avg_pixels_tab[0][3] = avg_pixels16_xy2_iwmmxt;
 192     c->avg_no_rnd_pixels_tab[0][0] = avg_pixels16_iwmmxt;
 193     c->avg_no_rnd_pixels_tab[0][1] = avg_no_rnd_pixels16_x2_iwmmxt;
 194     c->avg_no_rnd_pixels_tab[0][2] = avg_no_rnd_pixels16_y2_iwmmxt;
 195     c->avg_no_rnd_pixels_tab[0][3] = avg_no_rnd_pixels16_xy2_iwmmxt;
 196
 197     c->avg_pixels_tab[1][0] = avg_pixels8_iwmmxt;
 198     c->avg_pixels_tab[1][1] = avg_pixels8_x2_iwmmxt;
 199     c->avg_pixels_tab[1][2] = avg_pixels8_y2_iwmmxt;
 200     c->avg_pixels_tab[1][3] = avg_pixels8_xy2_iwmmxt;
 201     c->avg_no_rnd_pixels_tab[1][0] = avg_no_rnd_pixels8_iwmmxt;
 202     c->avg_no_rnd_pixels_tab[1][1] = avg_no_rnd_pixels8_x2_iwmmxt;
 203     c->avg_no_rnd_pixels_tab[1][2] = avg_no_rnd_pixels8_y2_iwmmxt;
 204     c->avg_no_rnd_pixels_tab[1][3] = avg_no_rnd_pixels8_xy2_iwmmxt;
 205 }