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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 21:30:08 EDT 2003 */
#include "codelet-dft.h"
/* Generated by: /homee/stevenj/cvs/fftw3.0.1/genfft/gen_twiddle -compact -variables 4 -twiddle-log3 -n 4 -name t2_4 -include t.h */
/*
* This function contains 24 FP additions, 16 FP multiplications,
* (or, 16 additions, 8 multiplications, 8 fused multiply/add),
* 21 stack variables, and 16 memory accesses
*/
/*
* Generator Id's :
* $Id: t2_4.c,v 1.1 2008/10/17 06:11:09 scuri Exp $
* $Id: t2_4.c,v 1.1 2008/10/17 06:11:09 scuri Exp $
* $Id: t2_4.c,v 1.1 2008/10/17 06:11:09 scuri Exp $
*/
#include "t.h"
static const R *t2_4(R *ri, R *ii, const R *W, stride ios, int m, int dist)
{
int i;
for (i = m; i > 0; i = i - 1, ri = ri + dist, ii = ii + dist, W = W + 4) {
E T1, Tp, Ta, Te, To, Tl, Tk, Th;
T1 = ri[0];
Tp = ii[0];
{
E T7, T9, Tc, Td, Tg, Tf, T2, T4, T3, T5, T6, T8;
T7 = ri[WS(ios, 2)];
T9 = ii[WS(ios, 2)];
Tc = ri[WS(ios, 1)];
Td = ii[WS(ios, 1)];
Tg = ii[WS(ios, 3)];
Tf = ri[WS(ios, 3)];
T2 = W[2];
T4 = W[3];
T3 = W[0];
T5 = W[1];
T6 = FMA(T2, T3, T4 * T5);
T8 = FNMS(T4, T3, T2 * T5);
Ta = FNMS(T8, T9, T6 * T7);
Te = FMA(T3, Tc, T5 * Td);
To = FMA(T8, T7, T6 * T9);
Tl = FNMS(T4, Tf, T2 * Tg);
Tk = FNMS(T5, Tc, T3 * Td);
Th = FMA(T2, Tf, T4 * Tg);
}
{
E Tb, Ti, Tn, Tq;
Tb = T1 + Ta;
Ti = Te + Th;
ri[WS(ios, 2)] = Tb - Ti;
ri[0] = Tb + Ti;
Tn = Tk + Tl;
Tq = To + Tp;
ii[0] = Tn + Tq;
ii[WS(ios, 2)] = Tq - Tn;
}
{
E Tj, Tm, Tr, Ts;
Tj = T1 - Ta;
Tm = Tk - Tl;
ri[WS(ios, 3)] = Tj - Tm;
ri[WS(ios, 1)] = Tj + Tm;
Tr = Tp - To;
Ts = Te - Th;
ii[WS(ios, 1)] = Tr - Ts;
ii[WS(ios, 3)] = Ts + Tr;
}
}
return W;
}
static const tw_instr twinstr[] = {
{TW_COS, 0, 1},
{TW_SIN, 0, 1},
{TW_COS, 0, 3},
{TW_SIN, 0, 3},
{TW_NEXT, 1, 0}
};
static const ct_desc desc = { 4, "t2_4", twinstr, {16, 8, 8, 0}, &GENUS, 0, 0, 0 };
void X(codelet_t2_4) (planner *p) {
X(kdft_dit_register) (p, t2_4, &desc);
}
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