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/*
* Copyright (c) 2003 Matteo Frigo
* Copyright (c) 2003 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 Sat Jul 5 21:56:51 EDT 2003 */
#include "codelet-rdft.h"
/* Generated by: /homee/stevenj/cvs/fftw3.0.1/genfft/gen_hc2hc -compact -variables 4 -n 3 -dit -name hf_3 -include hf.h */
/*
* This function contains 16 FP additions, 12 FP multiplications,
* (or, 10 additions, 6 multiplications, 6 fused multiply/add),
* 15 stack variables, and 12 memory accesses
*/
/*
* Generator Id's :
* $Id: hf_3.c,v 1.1 2008/10/17 06:12:34 scuri Exp $
* $Id: hf_3.c,v 1.1 2008/10/17 06:12:34 scuri Exp $
* $Id: hf_3.c,v 1.1 2008/10/17 06:12:34 scuri Exp $
*/
#include "hf.h"
static const R *hf_3(R *rio, R *iio, const R *W, stride ios, int m, int dist)
{
DK(KP866025403, +0.866025403784438646763723170752936183471402627);
DK(KP500000000, +0.500000000000000000000000000000000000000000000);
int i;
for (i = m - 2; i > 0; i = i - 2, rio = rio + dist, iio = iio - dist, W = W + 4) {
E T1, Ti, T6, Te, Tb, Tf, Tc, Th;
T1 = rio[0];
Ti = iio[-WS(ios, 2)];
{
E T3, T5, T2, T4;
T3 = rio[WS(ios, 1)];
T5 = iio[-WS(ios, 1)];
T2 = W[0];
T4 = W[1];
T6 = FMA(T2, T3, T4 * T5);
Te = FNMS(T4, T3, T2 * T5);
}
{
E T8, Ta, T7, T9;
T8 = rio[WS(ios, 2)];
Ta = iio[0];
T7 = W[2];
T9 = W[3];
Tb = FMA(T7, T8, T9 * Ta);
Tf = FNMS(T9, T8, T7 * Ta);
}
Tc = T6 + Tb;
Th = Te + Tf;
rio[0] = T1 + Tc;
iio[0] = Th + Ti;
{
E Td, Tg, Tj, Tk;
Td = FNMS(KP500000000, Tc, T1);
Tg = KP866025403 * (Te - Tf);
iio[-WS(ios, 2)] = Td - Tg;
rio[WS(ios, 1)] = Td + Tg;
Tj = KP866025403 * (Tb - T6);
Tk = FNMS(KP500000000, Th, Ti);
rio[WS(ios, 2)] = Tj - Tk;
iio[-WS(ios, 1)] = Tj + Tk;
}
}
return W;
}
static const tw_instr twinstr[] = {
{TW_FULL, 0, 3},
{TW_NEXT, 1, 0}
};
static const hc2hc_desc desc = { 3, "hf_3", twinstr, {10, 6, 6, 0}, &GENUS, 0, 0, 0 };
void X(codelet_hf_3) (planner *p) {
X(khc2hc_dit_register) (p, hf_3, &desc);
}
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