ref: 4f9a9087f16b92662389be3dc0589629359ac8a4
dir: /libfaad/fftw/ftwi_4.c/
/*
* Copyright (c) 1997-1999 Massachusetts Institute of Technology
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* This file was automatically generated --- DO NOT EDIT */
/* Generated on Sun Nov 7 20:44:57 EST 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddleinv 4 */
/*
* This function contains 22 FP additions, 12 FP multiplications,
* (or, 16 additions, 6 multiplications, 6 fused multiply/add),
* 14 stack variables, and 16 memory accesses
*/
/*
* Generator Id's :
* $Id: ftwi_4.c,v 1.1 2002/04/07 21:26:05 menno Exp $
* $Id: ftwi_4.c,v 1.1 2002/04/07 21:26:05 menno Exp $
* $Id: ftwi_4.c,v 1.1 2002/04/07 21:26:05 menno Exp $
*/
void fftwi_twiddle_4(fftw_complex *A, const fftw_complex *W, int iostride, int m, int dist)
{
int i;
fftw_complex *inout;
inout = A;
for (i = m; i > 0; i = i - 1, inout = inout + dist, W = W + 3) {
fftw_real tmp1;
fftw_real tmp25;
fftw_real tmp6;
fftw_real tmp24;
fftw_real tmp12;
fftw_real tmp20;
fftw_real tmp17;
fftw_real tmp21;
ASSERT_ALIGNED_DOUBLE;
tmp1 = c_re(inout[0]);
tmp25 = c_im(inout[0]);
{
fftw_real tmp3;
fftw_real tmp5;
fftw_real tmp2;
fftw_real tmp4;
ASSERT_ALIGNED_DOUBLE;
tmp3 = c_re(inout[2 * iostride]);
tmp5 = c_im(inout[2 * iostride]);
tmp2 = c_re(W[1]);
tmp4 = c_im(W[1]);
tmp6 = (tmp2 * tmp3) + (tmp4 * tmp5);
tmp24 = (tmp2 * tmp5) - (tmp4 * tmp3);
}
{
fftw_real tmp9;
fftw_real tmp11;
fftw_real tmp8;
fftw_real tmp10;
ASSERT_ALIGNED_DOUBLE;
tmp9 = c_re(inout[iostride]);
tmp11 = c_im(inout[iostride]);
tmp8 = c_re(W[0]);
tmp10 = c_im(W[0]);
tmp12 = (tmp8 * tmp9) + (tmp10 * tmp11);
tmp20 = (tmp8 * tmp11) - (tmp10 * tmp9);
}
{
fftw_real tmp14;
fftw_real tmp16;
fftw_real tmp13;
fftw_real tmp15;
ASSERT_ALIGNED_DOUBLE;
tmp14 = c_re(inout[3 * iostride]);
tmp16 = c_im(inout[3 * iostride]);
tmp13 = c_re(W[2]);
tmp15 = c_im(W[2]);
tmp17 = (tmp13 * tmp14) + (tmp15 * tmp16);
tmp21 = (tmp13 * tmp16) - (tmp15 * tmp14);
}
{
fftw_real tmp7;
fftw_real tmp18;
fftw_real tmp27;
fftw_real tmp28;
ASSERT_ALIGNED_DOUBLE;
tmp7 = tmp1 + tmp6;
tmp18 = tmp12 + tmp17;
c_re(inout[2 * iostride]) = tmp7 - tmp18;
c_re(inout[0]) = tmp7 + tmp18;
tmp27 = tmp12 - tmp17;
tmp28 = tmp25 - tmp24;
c_im(inout[iostride]) = tmp27 + tmp28;
c_im(inout[3 * iostride]) = tmp28 - tmp27;
}
{
fftw_real tmp23;
fftw_real tmp26;
fftw_real tmp19;
fftw_real tmp22;
ASSERT_ALIGNED_DOUBLE;
tmp23 = tmp20 + tmp21;
tmp26 = tmp24 + tmp25;
c_im(inout[0]) = tmp23 + tmp26;
c_im(inout[2 * iostride]) = tmp26 - tmp23;
tmp19 = tmp1 - tmp6;
tmp22 = tmp20 - tmp21;
c_re(inout[iostride]) = tmp19 - tmp22;
c_re(inout[3 * iostride]) = tmp19 + tmp22;
}
}
}
static const int twiddle_order[] =
{1, 2, 3};
fftw_codelet_desc fftwi_twiddle_4_desc =
{
"fftwi_twiddle_4",
(void (*)()) fftwi_twiddle_4,
4,
FFTW_BACKWARD,
FFTW_TWIDDLE,
99,
3,
twiddle_order,
};