mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
365 lines
7.0 KiB
C
365 lines
7.0 KiB
C
/*
|
|
* idct for sh4
|
|
*
|
|
* Copyright (c) 2001-2003 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 "../dsputil.h"
|
|
#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) */
|
|
|
|
const static float even_table[] __attribute__ ((aligned(8))) = {
|
|
c4, c4, c4, c4,
|
|
c2, c6,-c6,-c2,
|
|
c4,-c4,-c4, c4,
|
|
c6,-c2, c2,-c6
|
|
};
|
|
|
|
const static float odd_table[] __attribute__ ((aligned(8))) = {
|
|
c1, c3, c5, c7,
|
|
c3,-c7,-c1,-c5,
|
|
c5,-c1, c7, c3,
|
|
c7,-c5, c3,-c1
|
|
};
|
|
|
|
#undef c1
|
|
#undef c2
|
|
#undef c3
|
|
#undef c4
|
|
#undef c5
|
|
#undef c6
|
|
#undef c7
|
|
|
|
#if defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
|
|
|
|
#define load_matrix(table) \
|
|
__asm__ volatile( \
|
|
" 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" \
|
|
:\
|
|
: "r"(table)\
|
|
: "0" \
|
|
)
|
|
|
|
#define ftrv() \
|
|
__asm__ volatile("ftrv xmtrx,fv0" \
|
|
: "=f"(fr0),"=f"(fr1),"=f"(fr2),"=f"(fr3) \
|
|
: "0"(fr0), "1"(fr1), "2"(fr2), "3"(fr3) );
|
|
|
|
#define DEFREG \
|
|
register float fr0 __asm__("fr0"); \
|
|
register float fr1 __asm__("fr1"); \
|
|
register float fr2 __asm__("fr2"); \
|
|
register float fr3 __asm__("fr3")
|
|
|
|
#else
|
|
|
|
/* generic C code for check */
|
|
|
|
static void ftrv_(const float xf[],float fv[])
|
|
{
|
|
float f0,f1,f2,f3;
|
|
f0 = fv[0];
|
|
f1 = fv[1];
|
|
f2 = fv[2];
|
|
f3 = fv[3];
|
|
fv[0] = xf[0]*f0 + xf[4]*f1 + xf[ 8]*f2 + xf[12]*f3;
|
|
fv[1] = xf[1]*f0 + xf[5]*f1 + xf[ 9]*f2 + xf[13]*f3;
|
|
fv[2] = xf[2]*f0 + xf[6]*f1 + xf[10]*f2 + xf[14]*f3;
|
|
fv[3] = xf[3]*f0 + xf[7]*f1 + xf[11]*f2 + xf[15]*f3;
|
|
}
|
|
|
|
static void load_matrix_(float xf[],const float table[])
|
|
{
|
|
int i;
|
|
for(i=0;i<16;i++) xf[i]=table[i];
|
|
}
|
|
|
|
#define ftrv() ftrv_(xf,fv)
|
|
#define load_matrix(table) load_matrix_(xf,table)
|
|
|
|
#define DEFREG \
|
|
float fv[4],xf[16]
|
|
|
|
#define fr0 fv[0]
|
|
#define fr1 fv[1]
|
|
#define fr2 fv[2]
|
|
#define fr3 fv[3]
|
|
|
|
#endif
|
|
|
|
#if 1
|
|
#define DESCALE(x,n) (x)*(1.0f/(1<<(n)))
|
|
#else
|
|
#define DESCALE(x,n) (((int)(x)+(1<<(n-1)))>>(n))
|
|
#endif
|
|
|
|
/* this code work worse on gcc cvs. 3.2.3 work fine */
|
|
|
|
|
|
#if 1
|
|
//optimized
|
|
|
|
void idct_sh4(DCTELEM *block)
|
|
{
|
|
DEFREG;
|
|
|
|
int i;
|
|
float tblock[8*8],*fblock;
|
|
int ofs1,ofs2,ofs3;
|
|
|
|
#if defined(__SH4__)
|
|
#error "FIXME!! change to single float"
|
|
#endif
|
|
|
|
/* 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;
|
|
|
|
// ofs1 = sizeof(float)*1;
|
|
// ofs2 = sizeof(float)*2;
|
|
// ofs3 = sizeof(float)*3;
|
|
|
|
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);
|
|
|
|
#if defined(__SH4__)
|
|
#error "FIXME!! change to double"
|
|
#endif
|
|
}
|
|
#else
|
|
void idct_sh4(DCTELEM *block)
|
|
{
|
|
DEFREG;
|
|
|
|
int i;
|
|
float tblock[8*8],*fblock;
|
|
|
|
/* row */
|
|
|
|
/* even part */
|
|
load_matrix(even_table);
|
|
|
|
fblock = tblock;
|
|
i = 8;
|
|
do {
|
|
fr0 = block[0];
|
|
fr1 = block[2];
|
|
fr2 = block[4];
|
|
fr3 = block[6];
|
|
block+=8;
|
|
ftrv();
|
|
fblock[0] = fr0;
|
|
fblock[2] = fr1;
|
|
fblock[4] = fr2;
|
|
fblock[6] = fr3;
|
|
fblock+=8;
|
|
} while(--i);
|
|
block-=8*8;
|
|
fblock-=8*8;
|
|
|
|
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[0];
|
|
t1 = fblock[2];
|
|
t2 = fblock[4];
|
|
t3 = fblock[6];
|
|
fblock[0] = t0 + fr0;
|
|
fblock[7] = t0 - fr0;
|
|
fblock[1] = t1 + fr1;
|
|
fblock[6] = t1 - fr1;
|
|
fblock[2] = t2 + fr2;
|
|
fblock[5] = t2 - fr2;
|
|
fblock[3] = t3 + fr3;
|
|
fblock[4] = t3 - fr3;
|
|
fblock+=8;
|
|
} while(--i);
|
|
block-=8*8;
|
|
fblock-=8*8;
|
|
|
|
/* col */
|
|
|
|
/* even part */
|
|
load_matrix(even_table);
|
|
|
|
i = 8;
|
|
|
|
do {
|
|
fr0 = fblock[8*0];
|
|
fr1 = fblock[8*2];
|
|
fr2 = fblock[8*4];
|
|
fr3 = fblock[8*6];
|
|
ftrv();
|
|
fblock[8*0] = fr0;
|
|
fblock[8*2] = fr1;
|
|
fblock[8*4] = fr2;
|
|
fblock[8*6] = fr3;
|
|
fblock++;
|
|
} while(--i);
|
|
fblock-=8;
|
|
|
|
load_matrix(odd_table);
|
|
|
|
i=8;
|
|
do {
|
|
float t0,t1,t2,t3;
|
|
fr0 = fblock[8*1];
|
|
fr1 = fblock[8*3];
|
|
fr2 = fblock[8*5];
|
|
fr3 = fblock[8*7];
|
|
ftrv();
|
|
t0 = fblock[8*0];
|
|
t1 = fblock[8*2];
|
|
t2 = fblock[8*4];
|
|
t3 = fblock[8*6];
|
|
fblock++;
|
|
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);
|
|
}
|
|
#endif
|