mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-18 05:24:42 +00:00
82eb4b0f1b
Patch by Zuxy Meng, zuxy <<dot>> meng >>at<< gmail <<dot>> com Minor non-functional diff-related fixes by me. Originally committed as revision 5125 to svn://svn.ffmpeg.org/ffmpeg/trunk
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
|
|
* FFT/MDCT transform with 3DNow! optimizations
|
|
* Copyright (c) 2006 Zuxy MENG Jie.
|
|
* Based on fft_sse.c copyright (c) 2002 Fabrice Bellard.
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "../dsputil.h"
|
|
#include <math.h>
|
|
|
|
#ifdef HAVE_MM3DNOW
|
|
|
|
#include <mm3dnow.h>
|
|
|
|
static const int p1m1[2] __attribute__((aligned(8))) =
|
|
{ 0, 1 << 31 };
|
|
|
|
static const int m1p1[2] __attribute__((aligned(8))) =
|
|
{ 1 << 31, 0 };
|
|
|
|
void ff_fft_calc_3dn(FFTContext *s, FFTComplex *z)
|
|
{
|
|
int ln = s->nbits;
|
|
int j, np, np2;
|
|
int nblocks, nloops;
|
|
register FFTComplex *p, *q;
|
|
FFTComplex *cptr, *cptr1;
|
|
int k;
|
|
|
|
np = 1 << ln;
|
|
/* FEMMS not a must here but recommended by AMD */
|
|
_m_femms();
|
|
|
|
{
|
|
__m64 *r, a0, a1, b0, b1, tmp, c;
|
|
|
|
r = (__m64 *)&z[0];
|
|
if (s->inverse)
|
|
c = *(__m64 *)m1p1;
|
|
else
|
|
c = *(__m64 *)p1m1;
|
|
|
|
j = (np >> 2);
|
|
do {
|
|
/* do the pass 0 butterfly */
|
|
a0 = _m_pfadd(r[0], r[1]);
|
|
a1 = _m_pfsub(r[0], r[1]);
|
|
|
|
/* do the pass 0 butterfly */
|
|
b0 = _m_pfadd(r[2], r[3]);
|
|
b1 = _m_pfsub(r[2], r[3]);
|
|
|
|
/* multiply third by -i */
|
|
tmp = _m_punpckhdq(b1, b1);
|
|
b1 = _m_punpckldq(b1, b1);
|
|
b1 = _m_punpckldq(tmp, b1);
|
|
b1 = _m_pxor(b1, c);
|
|
|
|
/* do the pass 1 butterfly */
|
|
r[0] = _m_pfadd(a0, b0);
|
|
r[1] = _m_pfadd(a1, b1);
|
|
r[2] = _m_pfsub(a0, b0);
|
|
r[3] = _m_pfsub(a1, b1);
|
|
r += 4;
|
|
} while (--j != 0);
|
|
}
|
|
/* pass 2 .. ln-1 */
|
|
|
|
nblocks = np >> 3;
|
|
nloops = 1 << 2;
|
|
np2 = np >> 1;
|
|
|
|
cptr1 = s->exptab1;
|
|
do {
|
|
p = z;
|
|
q = z + nloops;
|
|
j = nblocks;
|
|
do {
|
|
cptr = cptr1;
|
|
k = nloops >> 1;
|
|
do {
|
|
__m64 a0, a1, b0, b1, c0, c1, t10, t11, t20, t21;
|
|
|
|
a0 = *(__m64 *)&p[0];
|
|
a1 = *(__m64 *)&p[1];
|
|
b0 = *(__m64 *)&q[0];
|
|
b1 = *(__m64 *)&q[1];
|
|
|
|
/* complex mul */
|
|
c0 = *(__m64 *)&cptr[0];
|
|
c1 = *(__m64 *)&cptr[1];
|
|
/* cre*re cim*re */
|
|
t10 = _m_pfmul(c0, _m_punpckldq(b0, b0));
|
|
t11 = _m_pfmul(c1, _m_punpckldq(b1, b1));
|
|
c0 = *(__m64 *)&cptr[2];
|
|
c1 = *(__m64 *)&cptr[3];
|
|
/* -cim*im cre*im */
|
|
t20 = _m_pfmul(c0, _m_punpckhdq(b0, b0));
|
|
t21 = _m_pfmul(c1, _m_punpckhdq(b1, b1));
|
|
b0 = _m_pfadd(t10, t20);
|
|
b1 = _m_pfadd(t11, t21);
|
|
|
|
/* butterfly */
|
|
*(__m64 *)&p[0] = _m_pfadd(a0, b0);
|
|
*(__m64 *)&p[1] = _m_pfadd(a1, b1);
|
|
*(__m64 *)&q[0] = _m_pfsub(a0, b0);
|
|
*(__m64 *)&q[1] = _m_pfsub(a1, b1);
|
|
|
|
p += 2;
|
|
q += 2;
|
|
cptr += 4;
|
|
} while (--k);
|
|
|
|
p += nloops;
|
|
q += nloops;
|
|
} while (--j);
|
|
cptr1 += nloops * 2;
|
|
nblocks = nblocks >> 1;
|
|
nloops = nloops << 1;
|
|
} while (nblocks != 0);
|
|
_m_femms();
|
|
}
|
|
|
|
#endif
|