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ffmpeg / libavcodec / ps2 / dsputil_mmi.c @ 5917d17c

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/*
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 * MMI optimized DSP utils
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 * Copyright (c) 2000, 2001 Fabrice Bellard.
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 *
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 * This library 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 of the License, or (at your option) any later version.
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 *
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 * This library 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 this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 * MMI optimization by Leon van Stuivenberg <leonvs@iae.nl>
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 */
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#include "../dsputil.h"
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#include "mmi.h"
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/* the provided 'as' in binutils 2.9EE doesn't support
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the EE's mips3 instructions properly */
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#define AS_BUGGY
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static void clear_blocks_mmi(DCTELEM * blocks)
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{
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    int i;
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    for (i = 0; i < 6; i++) {
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        asm volatile(
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        "sq     $0, 0(%0)       \n\t"
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        "sq     $0, 16(%0)      \n\t"
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        "sq     $0, 32(%0)      \n\t"
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        "sq     $0, 48(%0)      \n\t"
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        "sq     $0, 64(%0)      \n\t"
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        "sq     $0, 80(%0)      \n\t"
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        "sq     $0, 96(%0)      \n\t"
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        "sq     $0, 112(%0)     \n\t" :: "r" (blocks) : "memory" );
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        blocks += 64;
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    }
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}
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static void get_pixels_mmi(DCTELEM *block, const UINT8 *pixels, int line_size)
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{
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    int i;
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    for(i=0;i<8;i++) {
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#ifdef AS_BUGGY
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        ld3(5, 0, 8);
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        asm volatile(
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        "add    %1, %1, %2      \n\t"
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        "pextlb $8, $0, $8      \n\t"
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        "sq     $8, 0(%0)       \n\t" :: "r" (block), "r" (pixels), "r" (line_size) : "$8", "memory" );
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#else
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        asm volatile(
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        "ld     $8, 0(%1)       \n\t"
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        "add    %1, %1, %2      \n\t"
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        "pextlb $8, $0, $8      \n\t"
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        "sq     $8, 0(%0)       \n\t" :: "r" (block), "r" (pixels), "r" (line_size) : "$8", "memory" );
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#endif
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        block += 8;
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    }
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}
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static void put_pixels8_mmi(uint8_t *block, const uint8_t *pixels, int line_size, int h)
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{
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    int i;
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    for(i=0; i<h; i++) {
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#ifdef AS_BUGGY
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        ldr3(5, 0, 8);
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        ldl3(5, 7, 8);
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        asm volatile ( "add $5, $5, $6 \n\t" );
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        sd3(8, 0, 4);
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        asm volatile ( "add $4, $4, $6 \n\t" );
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#else
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        asm volatile(
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        "ldr    $8, 0(%1)       \n\t"
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        "ldl    $8, 7(%1)       \n\t"
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        "add    %1, %1, %2      \n\t"
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        "sd     $8, 0(%0)       \n\t"
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        "add    %0, %0, %2      \n\t" :: "r" (block), "r" (pixels), "r" (line_size) : "$8", "memory" );
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#endif
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    }
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}
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static void put_pixels16_mmi(uint8_t *block, const uint8_t *pixels, int line_size, int h)
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{
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    int i;
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    for(i=0; i<h; i++) {
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#ifdef AS_BUGGY
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        ldr3(5, 0, 8);
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        ldl3(5, 7, 8);
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        ldr3(5, 8, 9);
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        ldl3(5, 15, 9);
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        asm volatile ( "add $5, $5, $6 \n\t" );
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        pcpyld($9, $8, $8);
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        sq($8, 0, $4);
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        asm volatile ( "add $4, $4, $6 \n\t" );
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#else
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        asm volatile (
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        "ldr    $8, 0(%1)       \n\t"
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        "ldl    $8, 7(%1)       \n\t"
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        "ldr    $9, 8(%1)       \n\t"
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        "ldl    $9, 15(%1)      \n\t"
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        "add    %1, %1, %2      \n\t"
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        "pcpyld $8, $9, $8      \n\t"
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        "sq     $8, 0(%0)       \n\t"
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        "add    %0, %0, %2      \n\t" :: "r" (block), "r" (pixels), "r" (line_size) : "$8", "$9", "memory" );
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#endif
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    }
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}
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void dsputil_init_mmi(void)
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{
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    clear_blocks = clear_blocks_mmi;
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    put_pixels_tab[1][0] = put_pixels8_mmi;
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    put_no_rnd_pixels_tab[1][0] = put_pixels8_mmi;
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    put_pixels_tab[0][0] = put_pixels16_mmi;
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    put_no_rnd_pixels_tab[0][0] = put_pixels16_mmi;
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    get_pixels = get_pixels_mmi;
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}
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