annotate src/fftw-3.3.8/dft/scalar/codelets/n1_8.c @ 167:bd3cc4d1df30

Add FFTW 3.3.8 source, and a Linux build

/*
 * Copyright (c) 2003, 2007-14 Matteo Frigo
 * Copyright (c) 2003, 2007-14 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

/* This file was automatically generated --- DO NOT EDIT */
/* Generated on Thu May 24 08:04:10 EDT 2018 */

#include "dft/codelet-dft.h"

#if defined(ARCH_PREFERS_FMA) || defined(ISA_EXTENSION_PREFERS_FMA)

/* Generated by: ../../../genfft/gen_notw.native -fma -compact -variables 4 -pipeline-latency 4 -n 8 -name n1_8 -include dft/scalar/n.h */

/*
 * This function contains 52 FP additions, 8 FP multiplications,
 * (or, 44 additions, 0 multiplications, 8 fused multiply/add),
 * 28 stack variables, 1 constants, and 32 memory accesses
 */
#include "dft/scalar/n.h"

static void n1_8(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, INT v, INT ivs, INT ovs)
{
     DK(KP707106781, +0.707106781186547524400844362104849039284835938);
     {
	  INT i;
	  for (i = v; i > 0; i = i - 1, ri = ri + ivs, ii = ii + ivs, ro = ro + ovs, io = io + ovs, MAKE_VOLATILE_STRIDE(32, is), MAKE_VOLATILE_STRIDE(32, os)) {
	       E T3, Tn, Ti, TC, T6, TB, Tl, To, Td, TN, Tz, TH, Ta, TM, Tu;
	       E TG;
	       {
		    E T1, T2, Tj, Tk;
		    T1 = ri[0];
		    T2 = ri[WS(is, 4)];
		    T3 = T1 + T2;
		    Tn = T1 - T2;
		    {
			 E Tg, Th, T4, T5;
			 Tg = ii[0];
			 Th = ii[WS(is, 4)];
			 Ti = Tg + Th;
			 TC = Tg - Th;
			 T4 = ri[WS(is, 2)];
			 T5 = ri[WS(is, 6)];
			 T6 = T4 + T5;
			 TB = T4 - T5;
		    }
		    Tj = ii[WS(is, 2)];
		    Tk = ii[WS(is, 6)];
		    Tl = Tj + Tk;
		    To = Tj - Tk;
		    {
			 E Tb, Tc, Tv, Tw, Tx, Ty;
			 Tb = ri[WS(is, 7)];
			 Tc = ri[WS(is, 3)];
			 Tv = Tb - Tc;
			 Tw = ii[WS(is, 7)];
			 Tx = ii[WS(is, 3)];
			 Ty = Tw - Tx;
			 Td = Tb + Tc;
			 TN = Tw + Tx;
			 Tz = Tv - Ty;
			 TH = Tv + Ty;
		    }
		    {
			 E T8, T9, Tq, Tr, Ts, Tt;
			 T8 = ri[WS(is, 1)];
			 T9 = ri[WS(is, 5)];
			 Tq = T8 - T9;
			 Tr = ii[WS(is, 1)];
			 Ts = ii[WS(is, 5)];
			 Tt = Tr - Ts;
			 Ta = T8 + T9;
			 TM = Tr + Ts;
			 Tu = Tq + Tt;
			 TG = Tt - Tq;
		    }
	       }
	       {
		    E T7, Te, TP, TQ;
		    T7 = T3 + T6;
		    Te = Ta + Td;
		    ro[WS(os, 4)] = T7 - Te;
		    ro[0] = T7 + Te;
		    TP = Ti + Tl;
		    TQ = TM + TN;
		    io[WS(os, 4)] = TP - TQ;
		    io[0] = TP + TQ;
	       }
	       {
		    E Tf, Tm, TL, TO;
		    Tf = Td - Ta;
		    Tm = Ti - Tl;
		    io[WS(os, 2)] = Tf + Tm;
		    io[WS(os, 6)] = Tm - Tf;
		    TL = T3 - T6;
		    TO = TM - TN;
		    ro[WS(os, 6)] = TL - TO;
		    ro[WS(os, 2)] = TL + TO;
	       }
	       {
		    E Tp, TA, TJ, TK;
		    Tp = Tn + To;
		    TA = Tu + Tz;
		    ro[WS(os, 5)] = FNMS(KP707106781, TA, Tp);
		    ro[WS(os, 1)] = FMA(KP707106781, TA, Tp);
		    TJ = TC - TB;
		    TK = TG + TH;
		    io[WS(os, 5)] = FNMS(KP707106781, TK, TJ);
		    io[WS(os, 1)] = FMA(KP707106781, TK, TJ);
	       }
	       {
		    E TD, TE, TF, TI;
		    TD = TB + TC;
		    TE = Tz - Tu;
		    io[WS(os, 7)] = FNMS(KP707106781, TE, TD);
		    io[WS(os, 3)] = FMA(KP707106781, TE, TD);
		    TF = Tn - To;
		    TI = TG - TH;
		    ro[WS(os, 7)] = FNMS(KP707106781, TI, TF);
		    ro[WS(os, 3)] = FMA(KP707106781, TI, TF);
	       }
	  }
     }
}

static const kdft_desc desc = { 8, "n1_8", {44, 0, 8, 0}, &GENUS, 0, 0, 0, 0 };

void X(codelet_n1_8) (planner *p) {
     X(kdft_register) (p, n1_8, &desc);
}

#else

/* Generated by: ../../../genfft/gen_notw.native -compact -variables 4 -pipeline-latency 4 -n 8 -name n1_8 -include dft/scalar/n.h */

/*
 * This function contains 52 FP additions, 4 FP multiplications,
 * (or, 52 additions, 4 multiplications, 0 fused multiply/add),
 * 28 stack variables, 1 constants, and 32 memory accesses
 */
#include "dft/scalar/n.h"

static void n1_8(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, INT v, INT ivs, INT ovs)
{
     DK(KP707106781, +0.707106781186547524400844362104849039284835938);
     {
	  INT i;
	  for (i = v; i > 0; i = i - 1, ri = ri + ivs, ii = ii + ivs, ro = ro + ovs, io = io + ovs, MAKE_VOLATILE_STRIDE(32, is), MAKE_VOLATILE_STRIDE(32, os)) {
	       E T3, Tn, Ti, TC, T6, TB, Tl, To, Td, TN, Tz, TH, Ta, TM, Tu;
	       E TG;
	       {
		    E T1, T2, Tj, Tk;
		    T1 = ri[0];
		    T2 = ri[WS(is, 4)];
		    T3 = T1 + T2;
		    Tn = T1 - T2;
		    {
			 E Tg, Th, T4, T5;
			 Tg = ii[0];
			 Th = ii[WS(is, 4)];
			 Ti = Tg + Th;
			 TC = Tg - Th;
			 T4 = ri[WS(is, 2)];
			 T5 = ri[WS(is, 6)];
			 T6 = T4 + T5;
			 TB = T4 - T5;
		    }
		    Tj = ii[WS(is, 2)];
		    Tk = ii[WS(is, 6)];
		    Tl = Tj + Tk;
		    To = Tj - Tk;
		    {
			 E Tb, Tc, Tv, Tw, Tx, Ty;
			 Tb = ri[WS(is, 7)];
			 Tc = ri[WS(is, 3)];
			 Tv = Tb - Tc;
			 Tw = ii[WS(is, 7)];
			 Tx = ii[WS(is, 3)];
			 Ty = Tw - Tx;
			 Td = Tb + Tc;
			 TN = Tw + Tx;
			 Tz = Tv - Ty;
			 TH = Tv + Ty;
		    }
		    {
			 E T8, T9, Tq, Tr, Ts, Tt;
			 T8 = ri[WS(is, 1)];
			 T9 = ri[WS(is, 5)];
			 Tq = T8 - T9;
			 Tr = ii[WS(is, 1)];
			 Ts = ii[WS(is, 5)];
			 Tt = Tr - Ts;
			 Ta = T8 + T9;
			 TM = Tr + Ts;
			 Tu = Tq + Tt;
			 TG = Tt - Tq;
		    }
	       }
	       {
		    E T7, Te, TP, TQ;
		    T7 = T3 + T6;
		    Te = Ta + Td;
		    ro[WS(os, 4)] = T7 - Te;
		    ro[0] = T7 + Te;
		    TP = Ti + Tl;
		    TQ = TM + TN;
		    io[WS(os, 4)] = TP - TQ;
		    io[0] = TP + TQ;
	       }
	       {
		    E Tf, Tm, TL, TO;
		    Tf = Td - Ta;
		    Tm = Ti - Tl;
		    io[WS(os, 2)] = Tf + Tm;
		    io[WS(os, 6)] = Tm - Tf;
		    TL = T3 - T6;
		    TO = TM - TN;
		    ro[WS(os, 6)] = TL - TO;
		    ro[WS(os, 2)] = TL + TO;
	       }
	       {
		    E Tp, TA, TJ, TK;
		    Tp = Tn + To;
		    TA = KP707106781 * (Tu + Tz);
		    ro[WS(os, 5)] = Tp - TA;
		    ro[WS(os, 1)] = Tp + TA;
		    TJ = TC - TB;
		    TK = KP707106781 * (TG + TH);
		    io[WS(os, 5)] = TJ - TK;
		    io[WS(os, 1)] = TJ + TK;
	       }
	       {
		    E TD, TE, TF, TI;
		    TD = TB + TC;
		    TE = KP707106781 * (Tz - Tu);
		    io[WS(os, 7)] = TD - TE;
		    io[WS(os, 3)] = TD + TE;
		    TF = Tn - To;
		    TI = KP707106781 * (TG - TH);
		    ro[WS(os, 7)] = TF - TI;
		    ro[WS(os, 3)] = TF + TI;
	       }
	  }
     }
}

static const kdft_desc desc = { 8, "n1_8", {52, 4, 0, 0}, &GENUS, 0, 0, 0, 0 };

void X(codelet_n1_8) (planner *p) {
     X(kdft_register) (p, n1_8, &desc);
}

#endif