hc2cfdft_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 21:03:18 EST 2008 */

#include "codelet-rdft.h"

#ifdef HAVE_FMA

/* Generated by: ../../../genfft/gen_hc2cdft -fma -reorder-insns -schedule-for-pipeline -compact -variables 4 -pipeline-latency 4 -n 4 -dit -name hc2cfdft_4 -include hc2cf.h */

/*
 * This function contains 30 FP additions, 20 FP multiplications,
 * (or, 24 additions, 14 multiplications, 6 fused multiply/add),
 * 32 stack variables, 1 constants, and 16 memory accesses
 */
#include "hc2cf.h"

static void hc2cfdft_4(R *Rp, R *Ip, R *Rm, R *Im, const R *W, stride rs, INT mb, INT me, INT ms)
{
     DK(KP500000000, +0.500000000000000000000000000000000000000000000);
     INT m;
     for (m = mb, W = W + ((mb - 1) * 6); m < me; m = m + 1, Rp = Rp + ms, Ip = Ip + ms, Rm = Rm - ms, Im = Im - ms, W = W + 6, MAKE_VOLATILE_STRIDE(rs)) {
	  E Td, Tu, Tr, T4, Tm, To, T9, T5, TA, Tp, Tv, TD, T6, Tq;
	  {
	       E Tk, Tl, Tf, TC, Tj, T7, T8, T1, Tn, Tb, Tc;
	       Tb = Ip[0];
	       Tc = Im[0];
	       {
		    E Ti, Tg, Th, T2, T3;
		    Tg = Rm[0];
		    Th = Rp[0];
		    Tk = W[1];
		    Tl = Tb + Tc;
		    Td = Tb - Tc;
		    Tu = Th + Tg;
		    Ti = Tg - Th;
		    Tf = W[0];
		    T2 = Ip[WS(rs, 1)];
		    T3 = Im[WS(rs, 1)];
		    TC = Tk * Ti;
		    Tj = Tf * Ti;
		    T7 = Rp[WS(rs, 1)];
		    Tr = T2 + T3;
		    T4 = T2 - T3;
		    T8 = Rm[WS(rs, 1)];
		    T1 = W[2];
		    Tn = W[4];
	       }
	       Tm = FNMS(Tk, Tl, Tj);
	       To = T7 - T8;
	       T9 = T7 + T8;
	       T5 = T1 * T4;
	       TA = Tn * Tr;
	       Tp = Tn * To;
	       Tv = T1 * T9;
	       TD = FMA(Tf, Tl, TC);
	       T6 = W[3];
	       Tq = W[5];
	  }
	  {
	       E Tw, Ta, TB, Ts;
	       Tw = FMA(T6, T4, Tv);
	       Ta = FNMS(T6, T9, T5);
	       TB = FNMS(Tq, To, TA);
	       Ts = FMA(Tq, Tr, Tp);
	       {
		    E TF, Tx, Te, Tz;
		    TF = Tu + Tw;
		    Tx = Tu - Tw;
		    Te = Ta + Td;
		    Tz = Td - Ta;
		    {
			 E TG, TE, Tt, Ty;
			 TG = TB + TD;
			 TE = TB - TD;
			 Tt = Tm - Ts;
			 Ty = Ts + Tm;
			 Im[0] = KP500000000 * (TE - Tz);
			 Ip[WS(rs, 1)] = KP500000000 * (Tz + TE);
			 Rp[0] = KP500000000 * (TF + TG);
			 Rm[WS(rs, 1)] = KP500000000 * (TF - TG);
			 Rp[WS(rs, 1)] = KP500000000 * (Tx + Ty);
			 Rm[0] = KP500000000 * (Tx - Ty);
			 Im[WS(rs, 1)] = KP500000000 * (Tt - Te);
			 Ip[0] = KP500000000 * (Te + Tt);
		    }
	       }
	  }
     }
}

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

static const hc2c_desc desc = { 4, "hc2cfdft_4", twinstr, &GENUS, {24, 14, 6, 0} };

void X(codelet_hc2cfdft_4) (planner *p) {
     X(khc2c_register) (p, hc2cfdft_4, &desc, HC2C_VIA_DFT);
}
#else				/* HAVE_FMA */

/* Generated by: ../../../genfft/gen_hc2cdft -compact -variables 4 -pipeline-latency 4 -n 4 -dit -name hc2cfdft_4 -include hc2cf.h */

/*
 * This function contains 30 FP additions, 20 FP multiplications,
 * (or, 24 additions, 14 multiplications, 6 fused multiply/add),
 * 18 stack variables, 1 constants, and 16 memory accesses
 */
#include "hc2cf.h"

static void hc2cfdft_4(R *Rp, R *Ip, R *Rm, R *Im, const R *W, stride rs, INT mb, INT me, INT ms)
{
     DK(KP500000000, +0.500000000000000000000000000000000000000000000);
     INT m;
     for (m = mb, W = W + ((mb - 1) * 6); m < me; m = m + 1, Rp = Rp + ms, Ip = Ip + ms, Rm = Rm - ms, Im = Im - ms, W = W + 6, MAKE_VOLATILE_STRIDE(rs)) {
	  E Tc, Tr, Tk, Tx, T9, Ts, Tp, Tw;
	  {
	       E Ta, Tb, Tj, Tf, Tg, Th, Te, Ti;
	       Ta = Ip[0];
	       Tb = Im[0];
	       Tj = Ta + Tb;
	       Tf = Rm[0];
	       Tg = Rp[0];
	       Th = Tf - Tg;
	       Tc = Ta - Tb;
	       Tr = Tg + Tf;
	       Te = W[0];
	       Ti = W[1];
	       Tk = FNMS(Ti, Tj, Te * Th);
	       Tx = FMA(Ti, Th, Te * Tj);
	  }
	  {
	       E T4, To, T8, Tm;
	       {
		    E T2, T3, T6, T7;
		    T2 = Ip[WS(rs, 1)];
		    T3 = Im[WS(rs, 1)];
		    T4 = T2 - T3;
		    To = T2 + T3;
		    T6 = Rp[WS(rs, 1)];
		    T7 = Rm[WS(rs, 1)];
		    T8 = T6 + T7;
		    Tm = T6 - T7;
	       }
	       {
		    E T1, T5, Tl, Tn;
		    T1 = W[2];
		    T5 = W[3];
		    T9 = FNMS(T5, T8, T1 * T4);
		    Ts = FMA(T1, T8, T5 * T4);
		    Tl = W[4];
		    Tn = W[5];
		    Tp = FMA(Tl, Tm, Tn * To);
		    Tw = FNMS(Tn, Tm, Tl * To);
	       }
	  }
	  {
	       E Td, Tq, Tz, TA;
	       Td = T9 + Tc;
	       Tq = Tk - Tp;
	       Ip[0] = KP500000000 * (Td + Tq);
	       Im[WS(rs, 1)] = KP500000000 * (Tq - Td);
	       Tz = Tr + Ts;
	       TA = Tw + Tx;
	       Rm[WS(rs, 1)] = KP500000000 * (Tz - TA);
	       Rp[0] = KP500000000 * (Tz + TA);
	  }
	  {
	       E Tt, Tu, Tv, Ty;
	       Tt = Tr - Ts;
	       Tu = Tp + Tk;
	       Rm[0] = KP500000000 * (Tt - Tu);
	       Rp[WS(rs, 1)] = KP500000000 * (Tt + Tu);
	       Tv = Tc - T9;
	       Ty = Tw - Tx;
	       Ip[WS(rs, 1)] = KP500000000 * (Tv + Ty);
	       Im[0] = KP500000000 * (Ty - Tv);
	  }
     }
}

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

static const hc2c_desc desc = { 4, "hc2cfdft_4", twinstr, &GENUS, {24, 14, 6, 0} };

void X(codelet_hc2cfdft_4) (planner *p) {
     X(khc2c_register) (p, hc2cfdft_4, &desc, HC2C_VIA_DFT);
}
#endif				/* HAVE_FMA */