2003-05-14 15:18:49 +03:00
|
|
|
/*
|
|
|
|
* idct for sh4
|
|
|
|
*
|
|
|
|
* Copyright (c) 2001-2003 BERO <bero@geocities.co.jp>
|
|
|
|
*
|
2006-10-07 18:30:46 +03:00
|
|
|
* This file is part of FFmpeg.
|
|
|
|
*
|
|
|
|
* FFmpeg is free software; you can redistribute it and/or
|
2003-05-14 15:18:49 +03:00
|
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
|
|
* License as published by the Free Software Foundation; either
|
2006-10-07 18:30:46 +03:00
|
|
|
* version 2.1 of the License, or (at your option) any later version.
|
2003-05-14 15:18:49 +03:00
|
|
|
*
|
2006-10-07 18:30:46 +03:00
|
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
2003-05-14 15:18:49 +03:00
|
|
|
* 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
|
2006-10-07 18:30:46 +03:00
|
|
|
* License along with FFmpeg; if not, write to the Free Software
|
2006-01-13 00:43:26 +02:00
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
2003-05-14 15:18:49 +03:00
|
|
|
*/
|
|
|
|
|
2008-05-09 14:56:36 +03:00
|
|
|
#include "libavcodec/dsputil.h"
|
2010-03-08 04:36:22 +02:00
|
|
|
#include "dsputil_sh4.h"
|
2008-11-21 00:57:57 +02:00
|
|
|
#include "sh4.h"
|
|
|
|
|
2005-12-22 03:10:11 +02:00
|
|
|
#define c1 1.38703984532214752434 /* sqrt(2)*cos(1*pi/16) */
|
|
|
|
#define c2 1.30656296487637657577 /* sqrt(2)*cos(2*pi/16) */
|
|
|
|
#define c3 1.17587560241935884520 /* sqrt(2)*cos(3*pi/16) */
|
|
|
|
#define c4 1.00000000000000000000 /* sqrt(2)*cos(4*pi/16) */
|
|
|
|
#define c5 0.78569495838710234903 /* sqrt(2)*cos(5*pi/16) */
|
|
|
|
#define c6 0.54119610014619712324 /* sqrt(2)*cos(6*pi/16) */
|
|
|
|
#define c7 0.27589937928294311353 /* sqrt(2)*cos(7*pi/16) */
|
|
|
|
|
2006-08-08 13:24:26 +03:00
|
|
|
static const float even_table[] __attribute__ ((aligned(8))) = {
|
2005-12-22 03:10:11 +02:00
|
|
|
c4, c4, c4, c4,
|
|
|
|
c2, c6,-c6,-c2,
|
|
|
|
c4,-c4,-c4, c4,
|
|
|
|
c6,-c2, c2,-c6
|
2003-05-14 15:18:49 +03:00
|
|
|
};
|
|
|
|
|
2006-08-08 13:24:26 +03:00
|
|
|
static const float odd_table[] __attribute__ ((aligned(8))) = {
|
2005-12-22 03:10:11 +02:00
|
|
|
c1, c3, c5, c7,
|
|
|
|
c3,-c7,-c1,-c5,
|
|
|
|
c5,-c1, c7, c3,
|
|
|
|
c7,-c5, c3,-c1
|
2003-05-14 15:18:49 +03:00
|
|
|
};
|
|
|
|
|
2005-12-22 03:10:11 +02:00
|
|
|
#undef c1
|
|
|
|
#undef c2
|
|
|
|
#undef c3
|
|
|
|
#undef c4
|
|
|
|
#undef c5
|
|
|
|
#undef c6
|
|
|
|
#undef c7
|
2003-05-14 15:18:49 +03:00
|
|
|
|
2005-12-22 03:10:11 +02:00
|
|
|
#define load_matrix(table) \
|
2008-11-21 00:57:57 +02:00
|
|
|
do { \
|
|
|
|
const float *t = table; \
|
2008-10-16 16:34:09 +03:00
|
|
|
__asm__ volatile( \
|
2005-12-22 03:10:11 +02:00
|
|
|
" fschg\n" \
|
|
|
|
" fmov @%0+,xd0\n" \
|
|
|
|
" fmov @%0+,xd2\n" \
|
|
|
|
" fmov @%0+,xd4\n" \
|
|
|
|
" fmov @%0+,xd6\n" \
|
|
|
|
" fmov @%0+,xd8\n" \
|
|
|
|
" fmov @%0+,xd10\n" \
|
|
|
|
" fmov @%0+,xd12\n" \
|
|
|
|
" fmov @%0+,xd14\n" \
|
|
|
|
" fschg\n" \
|
2008-11-21 00:57:57 +02:00
|
|
|
: "+r"(t) \
|
|
|
|
); \
|
|
|
|
} while (0)
|
2005-12-22 03:10:11 +02:00
|
|
|
|
|
|
|
#define ftrv() \
|
2008-10-16 16:34:09 +03:00
|
|
|
__asm__ volatile("ftrv xmtrx,fv0" \
|
2008-11-21 00:57:57 +02:00
|
|
|
: "+f"(fr0),"+f"(fr1),"+f"(fr2),"+f"(fr3));
|
2005-12-22 03:10:11 +02:00
|
|
|
|
|
|
|
#define DEFREG \
|
2008-10-16 16:34:09 +03:00
|
|
|
register float fr0 __asm__("fr0"); \
|
|
|
|
register float fr1 __asm__("fr1"); \
|
|
|
|
register float fr2 __asm__("fr2"); \
|
|
|
|
register float fr3 __asm__("fr3")
|
2003-05-14 15:18:49 +03:00
|
|
|
|
2005-12-22 03:10:11 +02:00
|
|
|
#define DESCALE(x,n) (x)*(1.0f/(1<<(n)))
|
2003-05-14 15:18:49 +03:00
|
|
|
|
|
|
|
/* this code work worse on gcc cvs. 3.2.3 work fine */
|
|
|
|
|
|
|
|
|
2005-12-17 20:14:38 +02:00
|
|
|
//optimized
|
2003-05-14 15:18:49 +03:00
|
|
|
|
2013-01-20 03:02:29 +03:00
|
|
|
void ff_idct_sh4(int16_t *block)
|
2003-05-14 15:18:49 +03:00
|
|
|
{
|
2005-12-22 03:10:11 +02:00
|
|
|
DEFREG;
|
2003-05-14 15:18:49 +03:00
|
|
|
|
2005-12-22 03:10:11 +02:00
|
|
|
int i;
|
|
|
|
float tblock[8*8],*fblock;
|
|
|
|
int ofs1,ofs2,ofs3;
|
2008-11-21 00:57:57 +02:00
|
|
|
int fpscr;
|
2003-05-14 15:18:49 +03:00
|
|
|
|
2008-11-21 00:57:57 +02:00
|
|
|
fp_single_enter(fpscr);
|
2003-05-14 15:18:49 +03:00
|
|
|
|
2005-12-22 03:10:11 +02:00
|
|
|
/* row */
|
|
|
|
|
|
|
|
/* even part */
|
|
|
|
load_matrix(even_table);
|
|
|
|
|
|
|
|
fblock = tblock+4;
|
|
|
|
i = 8;
|
|
|
|
do {
|
|
|
|
fr0 = block[0];
|
|
|
|
fr1 = block[2];
|
|
|
|
fr2 = block[4];
|
|
|
|
fr3 = block[6];
|
|
|
|
block+=8;
|
|
|
|
ftrv();
|
|
|
|
*--fblock = fr3;
|
|
|
|
*--fblock = fr2;
|
|
|
|
*--fblock = fr1;
|
|
|
|
*--fblock = fr0;
|
|
|
|
fblock+=8+4;
|
|
|
|
} while(--i);
|
|
|
|
block-=8*8;
|
|
|
|
fblock-=8*8+4;
|
|
|
|
|
|
|
|
load_matrix(odd_table);
|
|
|
|
|
|
|
|
i = 8;
|
|
|
|
|
|
|
|
do {
|
|
|
|
float t0,t1,t2,t3;
|
|
|
|
fr0 = block[1];
|
|
|
|
fr1 = block[3];
|
|
|
|
fr2 = block[5];
|
|
|
|
fr3 = block[7];
|
|
|
|
block+=8;
|
|
|
|
ftrv();
|
|
|
|
t0 = *fblock++;
|
|
|
|
t1 = *fblock++;
|
|
|
|
t2 = *fblock++;
|
|
|
|
t3 = *fblock++;
|
|
|
|
fblock+=4;
|
|
|
|
*--fblock = t0 - fr0;
|
|
|
|
*--fblock = t1 - fr1;
|
|
|
|
*--fblock = t2 - fr2;
|
|
|
|
*--fblock = t3 - fr3;
|
|
|
|
*--fblock = t3 + fr3;
|
|
|
|
*--fblock = t2 + fr2;
|
|
|
|
*--fblock = t1 + fr1;
|
|
|
|
*--fblock = t0 + fr0;
|
|
|
|
fblock+=8;
|
|
|
|
} while(--i);
|
|
|
|
block-=8*8;
|
|
|
|
fblock-=8*8;
|
|
|
|
|
|
|
|
/* col */
|
|
|
|
|
|
|
|
/* even part */
|
|
|
|
load_matrix(even_table);
|
|
|
|
|
|
|
|
ofs1 = sizeof(float)*2*8;
|
|
|
|
ofs2 = sizeof(float)*4*8;
|
|
|
|
ofs3 = sizeof(float)*6*8;
|
|
|
|
|
|
|
|
i = 8;
|
|
|
|
|
|
|
|
#define OA(fblock,ofs) *(float*)((char*)fblock + ofs)
|
|
|
|
|
|
|
|
do {
|
|
|
|
fr0 = OA(fblock, 0);
|
|
|
|
fr1 = OA(fblock,ofs1);
|
|
|
|
fr2 = OA(fblock,ofs2);
|
|
|
|
fr3 = OA(fblock,ofs3);
|
|
|
|
ftrv();
|
|
|
|
OA(fblock,0 ) = fr0;
|
|
|
|
OA(fblock,ofs1) = fr1;
|
|
|
|
OA(fblock,ofs2) = fr2;
|
|
|
|
OA(fblock,ofs3) = fr3;
|
|
|
|
fblock++;
|
|
|
|
} while(--i);
|
|
|
|
fblock-=8;
|
|
|
|
|
|
|
|
load_matrix(odd_table);
|
|
|
|
|
|
|
|
i=8;
|
|
|
|
do {
|
|
|
|
float t0,t1,t2,t3;
|
|
|
|
t0 = OA(fblock, 0); /* [8*0] */
|
|
|
|
t1 = OA(fblock,ofs1); /* [8*2] */
|
|
|
|
t2 = OA(fblock,ofs2); /* [8*4] */
|
|
|
|
t3 = OA(fblock,ofs3); /* [8*6] */
|
|
|
|
fblock+=8;
|
|
|
|
fr0 = OA(fblock, 0); /* [8*1] */
|
|
|
|
fr1 = OA(fblock,ofs1); /* [8*3] */
|
|
|
|
fr2 = OA(fblock,ofs2); /* [8*5] */
|
|
|
|
fr3 = OA(fblock,ofs3); /* [8*7] */
|
|
|
|
fblock+=-8+1;
|
|
|
|
ftrv();
|
|
|
|
block[8*0] = DESCALE(t0 + fr0,3);
|
|
|
|
block[8*7] = DESCALE(t0 - fr0,3);
|
|
|
|
block[8*1] = DESCALE(t1 + fr1,3);
|
|
|
|
block[8*6] = DESCALE(t1 - fr1,3);
|
|
|
|
block[8*2] = DESCALE(t2 + fr2,3);
|
|
|
|
block[8*5] = DESCALE(t2 - fr2,3);
|
|
|
|
block[8*3] = DESCALE(t3 + fr3,3);
|
|
|
|
block[8*4] = DESCALE(t3 - fr3,3);
|
|
|
|
block++;
|
|
|
|
} while(--i);
|
2003-05-14 15:18:49 +03:00
|
|
|
|
2008-11-21 00:57:57 +02:00
|
|
|
fp_single_leave(fpscr);
|
2003-05-14 15:18:49 +03:00
|
|
|
}
|