n2bv_12.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 21:40:48 EDT 2003 */

#include "codelet-dft.h"

/* Generated by: /homee/stevenj/cvs/fftw3.0.1/genfft/gen_notw_c -simd -compact -variables 4 -sign 1 -n 12 -name n2bv_12 -with-ostride 2 -include n2b.h */

/*
 * This function contains 48 FP additions, 8 FP multiplications,
 * (or, 44 additions, 4 multiplications, 4 fused multiply/add),
 * 27 stack variables, and 24 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_c.ml,v 1.9 2003/04/16 21:21:53 athena Exp $
 */

#include "n2b.h"

static void n2bv_12(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, int v, int ivs, int ovs)
{
     DVK(KP866025403, +0.866025403784438646763723170752936183471402627);
     DVK(KP500000000, +0.500000000000000000000000000000000000000000000);
     int i;
     const R *xi;
     R *xo;
     xi = ii;
     xo = io;
     BEGIN_SIMD();
     for (i = v; i > 0; i = i - VL, xi = xi + (VL * ivs), xo = xo + (VL * ovs)) {
	  V T5, Ta, TG, TF, Ty, Tm, Ti, Tp, TJ, TI, Tx, Ts;
	  {
	       V T1, T6, T4, Tk, T9, Tl;
	       T1 = LD(&(xi[0]), ivs, &(xi[0]));
	       T6 = LD(&(xi[WS(is, 6)]), ivs, &(xi[0]));
	       {
		    V T2, T3, T7, T8;
		    T2 = LD(&(xi[WS(is, 4)]), ivs, &(xi[0]));
		    T3 = LD(&(xi[WS(is, 8)]), ivs, &(xi[0]));
		    T4 = VADD(T2, T3);
		    Tk = VSUB(T2, T3);
		    T7 = LD(&(xi[WS(is, 10)]), ivs, &(xi[0]));
		    T8 = LD(&(xi[WS(is, 2)]), ivs, &(xi[0]));
		    T9 = VADD(T7, T8);
		    Tl = VSUB(T7, T8);
	       }
	       T5 = VFNMS(LDK(KP500000000), T4, T1);
	       Ta = VFNMS(LDK(KP500000000), T9, T6);
	       TG = VADD(T6, T9);
	       TF = VADD(T1, T4);
	       Ty = VADD(Tk, Tl);
	       Tm = VMUL(LDK(KP866025403), VSUB(Tk, Tl));
	  }
	  {
	       V Tn, Tq, Te, To, Th, Tr;
	       Tn = LD(&(xi[WS(is, 3)]), ivs, &(xi[WS(is, 1)]));
	       Tq = LD(&(xi[WS(is, 9)]), ivs, &(xi[WS(is, 1)]));
	       {
		    V Tc, Td, Tf, Tg;
		    Tc = LD(&(xi[WS(is, 7)]), ivs, &(xi[WS(is, 1)]));
		    Td = LD(&(xi[WS(is, 11)]), ivs, &(xi[WS(is, 1)]));
		    Te = VSUB(Tc, Td);
		    To = VADD(Tc, Td);
		    Tf = LD(&(xi[WS(is, 1)]), ivs, &(xi[WS(is, 1)]));
		    Tg = LD(&(xi[WS(is, 5)]), ivs, &(xi[WS(is, 1)]));
		    Th = VSUB(Tf, Tg);
		    Tr = VADD(Tf, Tg);
	       }
	       Ti = VMUL(LDK(KP866025403), VSUB(Te, Th));
	       Tp = VFNMS(LDK(KP500000000), To, Tn);
	       TJ = VADD(Tq, Tr);
	       TI = VADD(Tn, To);
	       Tx = VADD(Te, Th);
	       Ts = VFNMS(LDK(KP500000000), Tr, Tq);
	  }
	  {
	       V TH, TK, TL, TM;
	       TH = VSUB(TF, TG);
	       TK = VBYI(VSUB(TI, TJ));
	       ST(&(xo[6]), VSUB(TH, TK), ovs, &(xo[2]));
	       ST(&(xo[18]), VADD(TH, TK), ovs, &(xo[2]));
	       TL = VADD(TF, TG);
	       TM = VADD(TI, TJ);
	       ST(&(xo[12]), VSUB(TL, TM), ovs, &(xo[0]));
	       ST(&(xo[0]), VADD(TL, TM), ovs, &(xo[0]));
	  }
	  {
	       V Tj, Tv, Tu, Tw, Tb, Tt;
	       Tb = VSUB(T5, Ta);
	       Tj = VSUB(Tb, Ti);
	       Tv = VADD(Tb, Ti);
	       Tt = VSUB(Tp, Ts);
	       Tu = VBYI(VADD(Tm, Tt));
	       Tw = VBYI(VSUB(Tt, Tm));
	       ST(&(xo[22]), VSUB(Tj, Tu), ovs, &(xo[2]));
	       ST(&(xo[10]), VADD(Tv, Tw), ovs, &(xo[2]));
	       ST(&(xo[2]), VADD(Tj, Tu), ovs, &(xo[2]));
	       ST(&(xo[14]), VSUB(Tv, Tw), ovs, &(xo[2]));
	  }
	  {
	       V Tz, TD, TC, TE, TA, TB;
	       Tz = VBYI(VMUL(LDK(KP866025403), VSUB(Tx, Ty)));
	       TD = VBYI(VMUL(LDK(KP866025403), VADD(Ty, Tx)));
	       TA = VADD(T5, Ta);
	       TB = VADD(Tp, Ts);
	       TC = VSUB(TA, TB);
	       TE = VADD(TA, TB);
	       ST(&(xo[4]), VADD(Tz, TC), ovs, &(xo[0]));
	       ST(&(xo[16]), VSUB(TE, TD), ovs, &(xo[0]));
	       ST(&(xo[20]), VSUB(TC, Tz), ovs, &(xo[0]));
	       ST(&(xo[8]), VADD(TD, TE), ovs, &(xo[0]));
	  }
     }
     END_SIMD();
}

static const kdft_desc desc = { 12, "n2bv_12", {44, 4, 4, 0}, &GENUS, 0, 2, 0, 0 };
void X(codelet_n2bv_12) (planner *p) {
     X(kdft_register) (p, n2bv_12, &desc);
}