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/*
* 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 Tue May 18 13:55:29 EDT 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-forward 4 */
/*
* This function contains 34 FP additions, 14 FP multiplications,
* (or, 28 additions, 8 multiplications, 6 fused multiply/add),
* 15 stack variables, and 32 memory accesses
*/
static const fftw_real K707106781 = FFTW_KONST(+0.707106781186547524400844362104849039284835938);
/*
* Generator Id's :
* $Id: fhf_4.c,v 1.2 2003-03-24 11:14:58 pj Exp $
* $Id: fhf_4.c,v 1.2 2003-03-24 11:14:58 pj Exp $
* $Id: fhf_4.c,v 1.2 2003-03-24 11:14:58 pj Exp $
*/
void fftw_hc2hc_forward_4(fftw_real *A, const fftw_complex *W, int iostride, int m, int dist)
{
int i;
fftw_real *X;
fftw_real *Y;
X = A;
Y = A + (4 * iostride);
{
fftw_real tmp35;
fftw_real tmp36;
fftw_real tmp37;
fftw_real tmp38;
fftw_real tmp39;
fftw_real tmp40;
ASSERT_ALIGNED_DOUBLE();
tmp35 = X[0];
tmp36 = X[2 * iostride];
tmp37 = tmp35 + tmp36;
tmp38 = X[iostride];
tmp39 = X[3 * iostride];
tmp40 = tmp38 + tmp39;
X[iostride] = tmp35 - tmp36;
Y[-iostride] = -(tmp38 - tmp39);
X[2 * iostride] = tmp37 - tmp40;
X[0] = tmp37 + tmp40;
}
X = X + dist;
Y = Y - dist;
for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 3) {
fftw_real tmp7;
fftw_real tmp30;
fftw_real tmp12;
fftw_real tmp29;
fftw_real tmp18;
fftw_real tmp26;
fftw_real tmp23;
fftw_real tmp27;
ASSERT_ALIGNED_DOUBLE();
tmp7 = X[0];
tmp30 = Y[-3 * iostride];
{
fftw_real tmp9;
fftw_real tmp11;
fftw_real tmp8;
fftw_real tmp10;
ASSERT_ALIGNED_DOUBLE();
tmp9 = X[2 * iostride];
tmp11 = Y[-iostride];
tmp8 = c_re(W[1]);
tmp10 = c_im(W[1]);
tmp12 = (tmp8 * tmp9) - (tmp10 * tmp11);
tmp29 = (tmp10 * tmp9) + (tmp8 * tmp11);
}
{
fftw_real tmp15;
fftw_real tmp17;
fftw_real tmp14;
fftw_real tmp16;
ASSERT_ALIGNED_DOUBLE();
tmp15 = X[iostride];
tmp17 = Y[-2 * iostride];
tmp14 = c_re(W[0]);
tmp16 = c_im(W[0]);
tmp18 = (tmp14 * tmp15) - (tmp16 * tmp17);
tmp26 = (tmp16 * tmp15) + (tmp14 * tmp17);
}
{
fftw_real tmp20;
fftw_real tmp22;
fftw_real tmp19;
fftw_real tmp21;
ASSERT_ALIGNED_DOUBLE();
tmp20 = X[3 * iostride];
tmp22 = Y[0];
tmp19 = c_re(W[2]);
tmp21 = c_im(W[2]);
tmp23 = (tmp19 * tmp20) - (tmp21 * tmp22);
tmp27 = (tmp21 * tmp20) + (tmp19 * tmp22);
}
{
fftw_real tmp13;
fftw_real tmp24;
fftw_real tmp33;
fftw_real tmp34;
ASSERT_ALIGNED_DOUBLE();
tmp13 = tmp7 + tmp12;
tmp24 = tmp18 + tmp23;
Y[-2 * iostride] = tmp13 - tmp24;
X[0] = tmp13 + tmp24;
tmp33 = tmp18 - tmp23;
tmp34 = tmp30 - tmp29;
X[3 * iostride] = -(tmp33 + tmp34);
Y[-iostride] = tmp34 - tmp33;
}
{
fftw_real tmp31;
fftw_real tmp32;
fftw_real tmp25;
fftw_real tmp28;
ASSERT_ALIGNED_DOUBLE();
tmp31 = tmp29 + tmp30;
tmp32 = tmp26 + tmp27;
X[2 * iostride] = -(tmp31 - tmp32);
Y[0] = tmp32 + tmp31;
tmp25 = tmp7 - tmp12;
tmp28 = tmp26 - tmp27;
Y[-3 * iostride] = tmp25 - tmp28;
X[iostride] = tmp25 + tmp28;
}
}
if (i == m) {
fftw_real tmp1;
fftw_real tmp6;
fftw_real tmp4;
fftw_real tmp5;
fftw_real tmp2;
fftw_real tmp3;
ASSERT_ALIGNED_DOUBLE();
tmp1 = X[0];
tmp6 = X[2 * iostride];
tmp2 = X[iostride];
tmp3 = X[3 * iostride];
tmp4 = K707106781 * (tmp2 - tmp3);
tmp5 = K707106781 * (tmp2 + tmp3);
X[iostride] = tmp1 - tmp4;
X[0] = tmp1 + tmp4;
Y[0] = -(tmp5 + tmp6);
Y[-iostride] = tmp6 - tmp5;
}
}
static const int twiddle_order[] =
{1, 2, 3};
fftw_codelet_desc fftw_hc2hc_forward_4_desc =
{
"fftw_hc2hc_forward_4",
(void (*)()) fftw_hc2hc_forward_4,
4,
FFTW_FORWARD,
FFTW_HC2HC,
91,
3,
twiddle_order,
};