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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 <ports/fftw-int.h>
#include <ports/fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-forward 3 */
/*
* This function contains 25 FP additions, 16 FP multiplications,
* (or, 17 additions, 8 multiplications, 8 fused multiply/add),
* 15 stack variables, and 24 memory accesses
*/
static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
/*
* Generator Id's :
* $Id: fhf_3.c,v 1.1.1.1 2002-03-29 14:12:58 pj Exp $
* $Id: fhf_3.c,v 1.1.1.1 2002-03-29 14:12:58 pj Exp $
* $Id: fhf_3.c,v 1.1.1.1 2002-03-29 14:12:58 pj Exp $
*/
void fftw_hc2hc_forward_3(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 + (3 * iostride);
{
fftw_real tmp24;
fftw_real tmp25;
fftw_real tmp26;
fftw_real tmp27;
ASSERT_ALIGNED_DOUBLE();
tmp24 = X[0];
tmp25 = X[iostride];
tmp26 = X[2 * iostride];
tmp27 = tmp25 + tmp26;
X[iostride] = tmp24 - (K500000000 * tmp27);
X[0] = tmp24 + tmp27;
Y[-iostride] = K866025403 * (tmp26 - tmp25);
}
X = X + dist;
Y = Y - dist;
for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 2) {
fftw_real tmp4;
fftw_real tmp21;
fftw_real tmp9;
fftw_real tmp17;
fftw_real tmp14;
fftw_real tmp18;
fftw_real tmp15;
fftw_real tmp20;
ASSERT_ALIGNED_DOUBLE();
tmp4 = X[0];
tmp21 = Y[-2 * iostride];
{
fftw_real tmp6;
fftw_real tmp8;
fftw_real tmp5;
fftw_real tmp7;
ASSERT_ALIGNED_DOUBLE();
tmp6 = X[iostride];
tmp8 = Y[-iostride];
tmp5 = c_re(W[0]);
tmp7 = c_im(W[0]);
tmp9 = (tmp5 * tmp6) - (tmp7 * tmp8);
tmp17 = (tmp7 * tmp6) + (tmp5 * tmp8);
}
{
fftw_real tmp11;
fftw_real tmp13;
fftw_real tmp10;
fftw_real tmp12;
ASSERT_ALIGNED_DOUBLE();
tmp11 = X[2 * iostride];
tmp13 = Y[0];
tmp10 = c_re(W[1]);
tmp12 = c_im(W[1]);
tmp14 = (tmp10 * tmp11) - (tmp12 * tmp13);
tmp18 = (tmp12 * tmp11) + (tmp10 * tmp13);
}
tmp15 = tmp9 + tmp14;
tmp20 = tmp17 + tmp18;
{
fftw_real tmp16;
fftw_real tmp19;
fftw_real tmp22;
fftw_real tmp23;
ASSERT_ALIGNED_DOUBLE();
X[0] = tmp4 + tmp15;
tmp16 = tmp4 - (K500000000 * tmp15);
tmp19 = K866025403 * (tmp17 - tmp18);
Y[-2 * iostride] = tmp16 - tmp19;
X[iostride] = tmp16 + tmp19;
Y[0] = tmp20 + tmp21;
tmp22 = tmp21 - (K500000000 * tmp20);
tmp23 = K866025403 * (tmp14 - tmp9);
X[2 * iostride] = -(tmp22 - tmp23);
Y[-iostride] = tmp23 + tmp22;
}
}
if (i == m) {
fftw_real tmp1;
fftw_real tmp3;
fftw_real tmp2;
ASSERT_ALIGNED_DOUBLE();
tmp1 = X[iostride];
tmp3 = X[0];
tmp2 = X[2 * iostride];
Y[0] = -(K866025403 * (tmp1 + tmp2));
X[iostride] = tmp3 + tmp2 - tmp1;
X[0] = tmp3 - (K500000000 * (tmp2 - tmp1));
}
}
static const int twiddle_order[] =
{1, 2};
fftw_codelet_desc fftw_hc2hc_forward_3_desc =
{
"fftw_hc2hc_forward_3",
(void (*)()) fftw_hc2hc_forward_3,
3,
FFTW_FORWARD,
FFTW_HC2HC,
69,
2,
twiddle_order,
};