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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 Sun Nov 7 20:43:53 EST 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -real2hc 3 */
/*
* This function contains 4 FP additions, 2 FP multiplications,
* (or, 3 additions, 1 multiplications, 1 fused multiply/add),
* 4 stack variables, and 6 memory accesses
*/
static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
/*
* Generator Id's :
* $Id: frc_3.c,v 1.1.1.1 2006/05/12 15:14:48 veplaini Exp $
* $Id: frc_3.c,v 1.1.1.1 2006/05/12 15:14:48 veplaini Exp $
* $Id: frc_3.c,v 1.1.1.1 2006/05/12 15:14:48 veplaini Exp $
*/
void fftw_real2hc_3(const fftw_real *input, fftw_real *real_output, fftw_real *imag_output, int istride, int real_ostride, int imag_ostride)
{
fftw_real tmp1;
fftw_real tmp2;
fftw_real tmp3;
fftw_real tmp4;
ASSERT_ALIGNED_DOUBLE;
tmp1 = input[0];
tmp2 = input[istride];
tmp3 = input[2 * istride];
tmp4 = tmp2 + tmp3;
real_output[real_ostride] = tmp1 - (K500000000 * tmp4);
real_output[0] = tmp1 + tmp4;
imag_output[imag_ostride] = K866025403 * (tmp3 - tmp2);
}
fftw_codelet_desc fftw_real2hc_3_desc =
{
"fftw_real2hc_3",
(void (*)()) fftw_real2hc_3,
3,
FFTW_FORWARD,
FFTW_REAL2HC,
68,
0,
(const int *) 0,
};
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