n1_5.c

fftw-3.0.1

/*
 * 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 21:29:32 EDT 2003 */

#include "codelet-dft.h"

/* Generated by: /homee/stevenj/cvs/fftw3.0.1/genfft/gen_notw -compact -variables 4 -n 5 -name n1_5 -include n.h */

/*
 * This function contains 32 FP additions, 12 FP multiplications,
 * (or, 26 additions, 6 multiplications, 6 fused multiply/add),
 * 21 stack variables, and 20 memory accesses
 */
/*
 * Generator Id's : 
 * $Id: algsimp.ml,v 1.7 2003/03/15 20:29:42 stevenj Exp $
 * $Id: fft.ml,v 1.2 2003/03/15 20:29:42 stevenj Exp $
 * $Id: gen_notw.ml,v 1.22 2003/04/17 11:07:19 athena Exp $
 */

#include "n.h"

static void n1_5(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, int v, int ivs, int ovs)
{
     DK(KP250000000, +0.250000000000000000000000000000000000000000000);
     DK(KP587785252, +0.587785252292473129168705954639072768597652438);
     DK(KP951056516, +0.951056516295153572116439333379382143405698634);
     DK(KP559016994, +0.559016994374947424102293417182819058860154590);
     int i;
     for (i = v; i > 0; i = i - 1, ri = ri + ivs, ii = ii + ivs, ro = ro + ovs, io = io + ovs) {
	  E T1, To, T8, Tt, T9, Ts, Te, Tp, Th, Tn;
	  T1 = ri[0];
	  To = ii[0];
	  {
	       E T2, T3, T4, T5, T6, T7;
	       T2 = ri[WS(is, 1)];
	       T3 = ri[WS(is, 4)];
	       T4 = T2 + T3;
	       T5 = ri[WS(is, 2)];
	       T6 = ri[WS(is, 3)];
	       T7 = T5 + T6;
	       T8 = T4 + T7;
	       Tt = T5 - T6;
	       T9 = KP559016994 * (T4 - T7);
	       Ts = T2 - T3;
	  }
	  {
	       E Tc, Td, Tl, Tf, Tg, Tm;
	       Tc = ii[WS(is, 1)];
	       Td = ii[WS(is, 4)];
	       Tl = Tc + Td;
	       Tf = ii[WS(is, 2)];
	       Tg = ii[WS(is, 3)];
	       Tm = Tf + Tg;
	       Te = Tc - Td;
	       Tp = Tl + Tm;
	       Th = Tf - Tg;
	       Tn = KP559016994 * (Tl - Tm);
	  }
	  ro[0] = T1 + T8;
	  io[0] = To + Tp;
	  {
	       E Ti, Tk, Tb, Tj, Ta;
	       Ti = FMA(KP951056516, Te, KP587785252 * Th);
	       Tk = FNMS(KP587785252, Te, KP951056516 * Th);
	       Ta = FNMS(KP250000000, T8, T1);
	       Tb = T9 + Ta;
	       Tj = Ta - T9;
	       ro[WS(os, 4)] = Tb - Ti;
	       ro[WS(os, 3)] = Tj + Tk;
	       ro[WS(os, 1)] = Tb + Ti;
	       ro[WS(os, 2)] = Tj - Tk;
	  }
	  {
	       E Tu, Tv, Tr, Tw, Tq;
	       Tu = FMA(KP951056516, Ts, KP587785252 * Tt);
	       Tv = FNMS(KP587785252, Ts, KP951056516 * Tt);
	       Tq = FNMS(KP250000000, Tp, To);
	       Tr = Tn + Tq;
	       Tw = Tq - Tn;
	       io[WS(os, 1)] = Tr - Tu;
	       io[WS(os, 3)] = Tw - Tv;
	       io[WS(os, 4)] = Tu + Tr;
	       io[WS(os, 2)] = Tv + Tw;
	  }
     }
}

static const kdft_desc desc = { 5, "n1_5", {26, 6, 6, 0}, &GENUS, 0, 0, 0, 0 };
void X(codelet_n1_5) (planner *p) {
     X(kdft_register) (p, n1_5, &desc);
}