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/*
* sh4 dsputil
*
* Copyright (c) 2003 BERO <bero@geocities.co.jp>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../avcodec.h"
#include "../dsputil.h"
static void memzero_align8(void *dst,size_t size)
{
#if defined(__SH4__) || defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
(char*)dst+=size;
size/=8*4;
asm(
#if defined(__SH4__)
" fschg\n" //single float mode
#endif
" fldi0 fr0\n"
" fldi0 fr1\n"
" fschg\n" // double
"1: \n" \
" dt %1\n"
" fmov dr0,@-%0\n"
" fmov dr0,@-%0\n"
" fmov dr0,@-%0\n"
" bf.s 1b\n"
" fmov dr0,@-%0\n"
#if defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
" fschg" //back to single
#endif
: : "r"(dst),"r"(size): "memory" );
#else
double *d = dst;
size/=8*4;
do {
d[0] = 0.0;
d[1] = 0.0;
d[2] = 0.0;
d[3] = 0.0;
d+=4;
} while(--size);
#endif
}
static void clear_blocks_sh4(DCTELEM *blocks)
{
// if (((int)blocks&7)==0)
memzero_align8(blocks,sizeof(DCTELEM)*6*64);
}
extern void idct_sh4(DCTELEM *block);
static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)
{
idct_sh4(block);
int i;
uint8_t *cm = cropTbl + MAX_NEG_CROP;
for(i=0;i<8;i++) {
dest[0] = cm[block[0]];
dest[1] = cm[block[1]];
dest[2] = cm[block[2]];
dest[3] = cm[block[3]];
dest[4] = cm[block[4]];
dest[5] = cm[block[5]];
dest[6] = cm[block[6]];
dest[7] = cm[block[7]];
dest+=line_size;
block+=8;
}
}
static void idct_add(uint8_t *dest, int line_size, DCTELEM *block)
{
idct_sh4(block);
int i;
uint8_t *cm = cropTbl + MAX_NEG_CROP;
for(i=0;i<8;i++) {
dest[0] = cm[dest[0]+block[0]];
dest[1] = cm[dest[1]+block[1]];
dest[2] = cm[dest[2]+block[2]];
dest[3] = cm[dest[3]+block[3]];
dest[4] = cm[dest[4]+block[4]];
dest[5] = cm[dest[5]+block[5]];
dest[6] = cm[dest[6]+block[6]];
dest[7] = cm[dest[7]+block[7]];
dest+=line_size;
block+=8;
}
}
extern void dsputil_init_align(DSPContext* c, AVCodecContext *avctx);
void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx)
{
const int idct_algo= avctx->idct_algo;
dsputil_init_align(c,avctx);
c->clear_blocks = clear_blocks_sh4;
if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SH4){
c->idct_put = idct_put;
c->idct_add = idct_add;
c->idct_permutation_type= FF_NO_IDCT_PERM; //FF_SIMPLE_IDCT_PERM; //FF_LIBMPEG2_IDCT_PERM;
}
}
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