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ffmpeg / libavcodec / arm / dsputil_iwmmxt.c @ 2912e87a

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/*
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 * iWMMXt optimized DSP utils
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 * Copyright (c) 2004 AGAWA Koji
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "libavutil/cpu.h"
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#include "libavcodec/dsputil.h"
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#define DEF(x, y) x ## _no_rnd_ ## y ##_iwmmxt
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#define SET_RND(regd)  __asm__ volatile ("mov r12, #1 \n\t tbcsth " #regd ", r12":::"r12");
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#define WAVG2B "wavg2b"
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#include "dsputil_iwmmxt_rnd_template.c"
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#undef DEF
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#undef SET_RND
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#undef WAVG2B
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#define DEF(x, y) x ## _ ## y ##_iwmmxt
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#define SET_RND(regd)  __asm__ volatile ("mov r12, #2 \n\t tbcsth " #regd ", r12":::"r12");
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#define WAVG2B "wavg2br"
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#include "dsputil_iwmmxt_rnd_template.c"
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#undef DEF
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#undef SET_RND
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#undef WAVG2BR
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// need scheduling
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#define OP(AVG)                                         \
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    __asm__ volatile (                                      \
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        /* alignment */                                 \
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        "and r12, %[pixels], #7 \n\t"                   \
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        "bic %[pixels], %[pixels], #7 \n\t"             \
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        "tmcr wcgr1, r12 \n\t"                          \
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                                                        \
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        "wldrd wr0, [%[pixels]] \n\t"                   \
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        "wldrd wr1, [%[pixels], #8] \n\t"               \
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        "add %[pixels], %[pixels], %[line_size] \n\t"   \
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        "walignr1 wr4, wr0, wr1 \n\t"                   \
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                                                        \
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        "1: \n\t"                                       \
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                                                        \
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        "wldrd wr2, [%[pixels]] \n\t"                   \
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        "wldrd wr3, [%[pixels], #8] \n\t"               \
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        "add %[pixels], %[pixels], %[line_size] \n\t"   \
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        "pld [%[pixels]] \n\t"                          \
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        "walignr1 wr5, wr2, wr3 \n\t"                   \
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        AVG " wr6, wr4, wr5 \n\t"                       \
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        "wstrd wr6, [%[block]] \n\t"                    \
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        "add %[block], %[block], %[line_size] \n\t"     \
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                                                        \
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        "wldrd wr0, [%[pixels]] \n\t"                   \
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        "wldrd wr1, [%[pixels], #8] \n\t"               \
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        "add %[pixels], %[pixels], %[line_size] \n\t"   \
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        "walignr1 wr4, wr0, wr1 \n\t"                   \
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        "pld [%[pixels]] \n\t"                          \
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        AVG " wr6, wr4, wr5 \n\t"                       \
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        "wstrd wr6, [%[block]] \n\t"                    \
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        "add %[block], %[block], %[line_size] \n\t"     \
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                                                        \
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        "subs %[h], %[h], #2 \n\t"                      \
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        "bne 1b \n\t"                                   \
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        : [block]"+r"(block), [pixels]"+r"(pixels), [h]"+r"(h)  \
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        : [line_size]"r"(line_size) \
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        : "memory", "r12");
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void put_pixels8_y2_iwmmxt(uint8_t *block, const uint8_t *pixels, const int line_size, int h)
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{
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    OP("wavg2br");
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}
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void put_no_rnd_pixels8_y2_iwmmxt(uint8_t *block, const uint8_t *pixels, const int line_size, int h)
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{
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    OP("wavg2b");
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}
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#undef OP
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void add_pixels_clamped_iwmmxt(const DCTELEM *block, uint8_t *pixels, int line_size)
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{
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    uint8_t *pixels2 = pixels + line_size;
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    __asm__ volatile (
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        "mov            r12, #4                 \n\t"
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        "1:                                     \n\t"
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        "pld            [%[pixels], %[line_size2]]              \n\t"
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        "pld            [%[pixels2], %[line_size2]]             \n\t"
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        "wldrd          wr4, [%[pixels]]        \n\t"
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        "wldrd          wr5, [%[pixels2]]       \n\t"
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        "pld            [%[block], #32]         \n\t"
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        "wunpckelub     wr6, wr4                \n\t"
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        "wldrd          wr0, [%[block]]         \n\t"
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        "wunpckehub     wr7, wr4                \n\t"
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        "wldrd          wr1, [%[block], #8]     \n\t"
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        "wunpckelub     wr8, wr5                \n\t"
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        "wldrd          wr2, [%[block], #16]    \n\t"
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        "wunpckehub     wr9, wr5                \n\t"
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        "wldrd          wr3, [%[block], #24]    \n\t"
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        "add            %[block], %[block], #32 \n\t"
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        "waddhss        wr10, wr0, wr6          \n\t"
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        "waddhss        wr11, wr1, wr7          \n\t"
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        "waddhss        wr12, wr2, wr8          \n\t"
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        "waddhss        wr13, wr3, wr9          \n\t"
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        "wpackhus       wr14, wr10, wr11        \n\t"
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        "wpackhus       wr15, wr12, wr13        \n\t"
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        "wstrd          wr14, [%[pixels]]       \n\t"
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        "add            %[pixels], %[pixels], %[line_size2]     \n\t"
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        "subs           r12, r12, #1            \n\t"
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        "wstrd          wr15, [%[pixels2]]      \n\t"
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        "add            %[pixels2], %[pixels2], %[line_size2]   \n\t"
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        "bne            1b                      \n\t"
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        : [block]"+r"(block), [pixels]"+r"(pixels), [pixels2]"+r"(pixels2)
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        : [line_size2]"r"(line_size << 1)
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        : "cc", "memory", "r12");
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}
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static void clear_blocks_iwmmxt(DCTELEM *blocks)
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{
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    __asm__ volatile(
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                "wzero wr0                      \n\t"
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                "mov r1, #(128 * 6 / 32)        \n\t"
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                "1:                             \n\t"
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                "wstrd wr0, [%0]                \n\t"
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                "wstrd wr0, [%0, #8]            \n\t"
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                "wstrd wr0, [%0, #16]           \n\t"
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                "wstrd wr0, [%0, #24]           \n\t"
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                "subs r1, r1, #1                \n\t"
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                "add %0, %0, #32                \n\t"
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                "bne 1b                         \n\t"
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                : "+r"(blocks)
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                :
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                : "r1"
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        );
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}
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static void nop(uint8_t *block, const uint8_t *pixels, int line_size, int h)
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{
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    return;
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}
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/* A run time test is not simple. If this file is compiled in
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 * then we should install the functions
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 */
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void ff_dsputil_init_iwmmxt(DSPContext* c, AVCodecContext *avctx)
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{
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    int mm_flags = AV_CPU_FLAG_IWMMXT; /* multimedia extension flags */
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    if (avctx->dsp_mask) {
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        if (avctx->dsp_mask & AV_CPU_FLAG_FORCE)
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            mm_flags |= (avctx->dsp_mask & 0xffff);
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        else
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            mm_flags &= ~(avctx->dsp_mask & 0xffff);
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    }
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    if (!(mm_flags & AV_CPU_FLAG_IWMMXT)) return;
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    c->add_pixels_clamped = add_pixels_clamped_iwmmxt;
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    c->clear_blocks = clear_blocks_iwmmxt;
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    c->put_pixels_tab[0][0] = put_pixels16_iwmmxt;
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    c->put_pixels_tab[0][1] = put_pixels16_x2_iwmmxt;
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    c->put_pixels_tab[0][2] = put_pixels16_y2_iwmmxt;
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    c->put_pixels_tab[0][3] = put_pixels16_xy2_iwmmxt;
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    c->put_no_rnd_pixels_tab[0][0] = put_pixels16_iwmmxt;
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    c->put_no_rnd_pixels_tab[0][1] = put_no_rnd_pixels16_x2_iwmmxt;
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    c->put_no_rnd_pixels_tab[0][2] = put_no_rnd_pixels16_y2_iwmmxt;
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    c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_iwmmxt;
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    c->put_pixels_tab[1][0] = put_pixels8_iwmmxt;
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    c->put_pixels_tab[1][1] = put_pixels8_x2_iwmmxt;
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    c->put_pixels_tab[1][2] = put_pixels8_y2_iwmmxt;
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    c->put_pixels_tab[1][3] = put_pixels8_xy2_iwmmxt;
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    c->put_no_rnd_pixels_tab[1][0] = put_pixels8_iwmmxt;
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    c->put_no_rnd_pixels_tab[1][1] = put_no_rnd_pixels8_x2_iwmmxt;
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    c->put_no_rnd_pixels_tab[1][2] = put_no_rnd_pixels8_y2_iwmmxt;
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    c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_iwmmxt;
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    c->avg_pixels_tab[0][0] = avg_pixels16_iwmmxt;
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    c->avg_pixels_tab[0][1] = avg_pixels16_x2_iwmmxt;
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    c->avg_pixels_tab[0][2] = avg_pixels16_y2_iwmmxt;
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    c->avg_pixels_tab[0][3] = avg_pixels16_xy2_iwmmxt;
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    c->avg_no_rnd_pixels_tab[0][0] = avg_pixels16_iwmmxt;
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    c->avg_no_rnd_pixels_tab[0][1] = avg_no_rnd_pixels16_x2_iwmmxt;
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    c->avg_no_rnd_pixels_tab[0][2] = avg_no_rnd_pixels16_y2_iwmmxt;
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    c->avg_no_rnd_pixels_tab[0][3] = avg_no_rnd_pixels16_xy2_iwmmxt;
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    c->avg_pixels_tab[1][0] = avg_pixels8_iwmmxt;
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    c->avg_pixels_tab[1][1] = avg_pixels8_x2_iwmmxt;
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    c->avg_pixels_tab[1][2] = avg_pixels8_y2_iwmmxt;
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    c->avg_pixels_tab[1][3] = avg_pixels8_xy2_iwmmxt;
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    c->avg_no_rnd_pixels_tab[1][0] = avg_no_rnd_pixels8_iwmmxt;
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    c->avg_no_rnd_pixels_tab[1][1] = avg_no_rnd_pixels8_x2_iwmmxt;
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    c->avg_no_rnd_pixels_tab[1][2] = avg_no_rnd_pixels8_y2_iwmmxt;
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    c->avg_no_rnd_pixels_tab[1][3] = avg_no_rnd_pixels8_xy2_iwmmxt;
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}