hb_4.c

快速fft变换

/*
 * Copyright (c) 2003, 2007-8 Matteo Frigo
 * Copyright (c) 2003, 2007-8 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 Nov 15 21:06:15 EST 2008 */

#include "codelet-rdft.h"

#ifdef HAVE_FMA

/* Generated by: ../../../genfft/gen_hc2hc -fma -reorder-insns -schedule-for-pipeline -compact -variables 4 -pipeline-latency 4 -sign 1 -n 4 -dif -name hb_4 -include hb.h */

/*
 * This function contains 22 FP additions, 12 FP multiplications,
 * (or, 16 additions, 6 multiplications, 6 fused multiply/add),
 * 27 stack variables, 0 constants, and 16 memory accesses
 */
#include "hb.h"

static void hb_4(R *cr, R *ci, const R *W, stride rs, INT mb, INT me, INT ms)
{
     INT m;
     for (m = mb, W = W + ((mb - 1) * 6); m < me; m = m + 1, cr = cr + ms, ci = ci - ms, W = W + 6, MAKE_VOLATILE_STRIDE(rs)) {
	  E T8, Th, Ta, T7, Ti, T9;
	  {
	       E Td, Tg, T3, T6, Tu, Tm, Tx, Tr;
	       {
		    E Tq, Tl, T4, T5, Tk, Tp;
		    {
			 E Tb, Tc, Te, Tf, T1, T2;
			 Tb = ci[WS(rs, 3)];
			 Tc = cr[WS(rs, 2)];
			 Te = ci[WS(rs, 2)];
			 Tf = cr[WS(rs, 3)];
			 T1 = cr[0];
			 Tq = Tb + Tc;
			 Td = Tb - Tc;
			 T2 = ci[WS(rs, 1)];
			 Tl = Te + Tf;
			 Tg = Te - Tf;
			 T4 = cr[WS(rs, 1)];
			 T5 = ci[0];
			 T3 = T1 + T2;
			 Tk = T1 - T2;
		    }
		    Tp = T4 - T5;
		    T6 = T4 + T5;
		    Tu = Tk + Tl;
		    Tm = Tk - Tl;
		    Tx = Tq - Tp;
		    Tr = Tp + Tq;
		    T8 = T3 - T6;
	       }
	       cr[0] = T3 + T6;
	       {
		    E Tj, To, Tw, Tv;
		    Tj = W[0];
		    ci[0] = Td + Tg;
		    To = W[1];
		    {
			 E Tt, Ts, Tn, Ty;
			 Tt = W[4];
			 Ts = Tj * Tr;
			 Tn = Tj * Tm;
			 Tw = W[5];
			 Ty = Tt * Tx;
			 Tv = Tt * Tu;
			 ci[WS(rs, 1)] = FMA(To, Tm, Ts);
			 cr[WS(rs, 1)] = FNMS(To, Tr, Tn);
			 ci[WS(rs, 3)] = FMA(Tw, Tu, Ty);
		    }
		    cr[WS(rs, 3)] = FNMS(Tw, Tx, Tv);
		    Th = Td - Tg;
		    Ta = W[3];
		    T7 = W[2];
	       }
	  }
	  Ti = Ta * T8;
	  T9 = T7 * T8;
	  ci[WS(rs, 2)] = FMA(T7, Th, Ti);
	  cr[WS(rs, 2)] = FNMS(Ta, Th, T9);
     }
}

static const tw_instr twinstr[] = {
     {TW_FULL, 1, 4},
     {TW_NEXT, 1, 0}
};

static const hc2hc_desc desc = { 4, "hb_4", twinstr, &GENUS, {16, 6, 6, 0} };

void X(codelet_hb_4) (planner *p) {
     X(khc2hc_register) (p, hb_4, &desc);
}
#else				/* HAVE_FMA */

/* Generated by: ../../../genfft/gen_hc2hc -compact -variables 4 -pipeline-latency 4 -sign 1 -n 4 -dif -name hb_4 -include hb.h */

/*
 * This function contains 22 FP additions, 12 FP multiplications,
 * (or, 16 additions, 6 multiplications, 6 fused multiply/add),
 * 13 stack variables, 0 constants, and 16 memory accesses
 */
#include "hb.h"

static void hb_4(R *cr, R *ci, const R *W, stride rs, INT mb, INT me, INT ms)
{
     INT m;
     for (m = mb, W = W + ((mb - 1) * 6); m < me; m = m + 1, cr = cr + ms, ci = ci - ms, W = W + 6, MAKE_VOLATILE_STRIDE(rs)) {
	  E T3, Ti, T6, Tm, Tc, Tn, Tf, Tj;
	  {
	       E T1, T2, T4, T5;
	       T1 = cr[0];
	       T2 = ci[WS(rs, 1)];
	       T3 = T1 + T2;
	       Ti = T1 - T2;
	       T4 = cr[WS(rs, 1)];
	       T5 = ci[0];
	       T6 = T4 + T5;
	       Tm = T4 - T5;
	  }
	  {
	       E Ta, Tb, Td, Te;
	       Ta = ci[WS(rs, 3)];
	       Tb = cr[WS(rs, 2)];
	       Tc = Ta - Tb;
	       Tn = Ta + Tb;
	       Td = ci[WS(rs, 2)];
	       Te = cr[WS(rs, 3)];
	       Tf = Td - Te;
	       Tj = Td + Te;
	  }
	  cr[0] = T3 + T6;
	  ci[0] = Tc + Tf;
	  {
	       E T8, Tg, T7, T9;
	       T8 = T3 - T6;
	       Tg = Tc - Tf;
	       T7 = W[2];
	       T9 = W[3];
	       cr[WS(rs, 2)] = FNMS(T9, Tg, T7 * T8);
	       ci[WS(rs, 2)] = FMA(T9, T8, T7 * Tg);
	  }
	  {
	       E Tk, To, Th, Tl;
	       Tk = Ti - Tj;
	       To = Tm + Tn;
	       Th = W[0];
	       Tl = W[1];
	       cr[WS(rs, 1)] = FNMS(Tl, To, Th * Tk);
	       ci[WS(rs, 1)] = FMA(Th, To, Tl * Tk);
	  }
	  {
	       E Tq, Ts, Tp, Tr;
	       Tq = Ti + Tj;
	       Ts = Tn - Tm;
	       Tp = W[4];
	       Tr = W[5];
	       cr[WS(rs, 3)] = FNMS(Tr, Ts, Tp * Tq);
	       ci[WS(rs, 3)] = FMA(Tp, Ts, Tr * Tq);
	  }
     }
}

static const tw_instr twinstr[] = {
     {TW_FULL, 1, 4},
     {TW_NEXT, 1, 0}
};

static const hc2hc_desc desc = { 4, "hb_4", twinstr, &GENUS, {16, 6, 6, 0} };

void X(codelet_hb_4) (planner *p) {
     X(khc2hc_register) (p, hb_4, &desc);
}
#endif				/* HAVE_FMA */