annotate src/fftw-3.3.8/rdft/scalar/r2cb/hc2cbdft2_4.c @ 82:d0c2a83c1364

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 08:08:00 EDT 2018 */

#include "rdft/codelet-rdft.h"

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

/* Generated by: ../../../genfft/gen_hc2cdft.native -fma -compact -variables 4 -pipeline-latency 4 -sign 1 -n 4 -dif -name hc2cbdft2_4 -include rdft/scalar/hc2cb.h */

/*
 * This function contains 30 FP additions, 12 FP multiplications,
 * (or, 24 additions, 6 multiplications, 6 fused multiply/add),
 * 23 stack variables, 0 constants, and 16 memory accesses
 */
#include "rdft/scalar/hc2cb.h"

static void hc2cbdft2_4(R *Rp, R *Ip, R *Rm, R *Im, 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, Rp = Rp + ms, Ip = Ip + ms, Rm = Rm - ms, Im = Im - ms, W = W + 6, MAKE_VOLATILE_STRIDE(16, rs)) {
	       E T3, Tm, T6, Tn, Td, Tk, TB, Ty, Tv, Ts;
	       {
		    E Tg, Tc, T9, Tj;
		    {
			 E T1, T2, Ta, Tb;
			 T1 = Rp[0];
			 T2 = Rm[WS(rs, 1)];
			 T3 = T1 + T2;
			 Tg = T1 - T2;
			 Ta = Ip[0];
			 Tb = Im[WS(rs, 1)];
			 Tc = Ta + Tb;
			 Tm = Ta - Tb;
		    }
		    {
			 E T4, T5, Th, Ti;
			 T4 = Rp[WS(rs, 1)];
			 T5 = Rm[0];
			 T6 = T4 + T5;
			 T9 = T4 - T5;
			 Th = Ip[WS(rs, 1)];
			 Ti = Im[0];
			 Tj = Th + Ti;
			 Tn = Th - Ti;
		    }
		    Td = T9 + Tc;
		    Tk = Tg - Tj;
		    TB = Tg + Tj;
		    Ty = Tc - T9;
		    Tv = Tm - Tn;
		    Ts = T3 - T6;
	       }
	       {
		    E T7, To, Te, Tp, T8, Tl, Tq, Tf;
		    T7 = T3 + T6;
		    To = Tm + Tn;
		    T8 = W[0];
		    Te = T8 * Td;
		    Tp = T8 * Tk;
		    Tf = W[1];
		    Tl = FMA(Tf, Tk, Te);
		    Tq = FNMS(Tf, Td, Tp);
		    Rp[0] = T7 - Tl;
		    Ip[0] = To + Tq;
		    Rm[0] = T7 + Tl;
		    Im[0] = Tq - To;
	       }
	       {
		    E Tr, Tt, Tu, TD, Tz, TF, Tx;
		    Tr = W[2];
		    Tt = Tr * Ts;
		    Tu = W[3];
		    TD = Tu * Ts;
		    Tx = W[4];
		    Tz = Tx * Ty;
		    TF = Tx * TB;
		    {
			 E Tw, TE, TC, TG, TA;
			 Tw = FNMS(Tu, Tv, Tt);
			 TE = FMA(Tr, Tv, TD);
			 TA = W[5];
			 TC = FMA(TA, TB, Tz);
			 TG = FNMS(TA, Ty, TF);
			 Rp[WS(rs, 1)] = Tw - TC;
			 Ip[WS(rs, 1)] = TE + TG;
			 Rm[WS(rs, 1)] = Tw + TC;
			 Im[WS(rs, 1)] = TG - TE;
		    }
	       }
	  }
     }
}

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

static const hc2c_desc desc = { 4, "hc2cbdft2_4", twinstr, &GENUS, {24, 6, 6, 0} };

void X(codelet_hc2cbdft2_4) (planner *p) {
     X(khc2c_register) (p, hc2cbdft2_4, &desc, HC2C_VIA_DFT);
}
#else

/* Generated by: ../../../genfft/gen_hc2cdft.native -compact -variables 4 -pipeline-latency 4 -sign 1 -n 4 -dif -name hc2cbdft2_4 -include rdft/scalar/hc2cb.h */

/*
 * This function contains 30 FP additions, 12 FP multiplications,
 * (or, 24 additions, 6 multiplications, 6 fused multiply/add),
 * 19 stack variables, 0 constants, and 16 memory accesses
 */
#include "rdft/scalar/hc2cb.h"

static void hc2cbdft2_4(R *Rp, R *Ip, R *Rm, R *Im, 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, Rp = Rp + ms, Ip = Ip + ms, Rm = Rm - ms, Im = Im - ms, W = W + 6, MAKE_VOLATILE_STRIDE(16, rs)) {
	       E T3, Tl, T6, Tm, Td, Tj, Tx, Tv, Ts, Tq;
	       {
		    E Tf, Tc, T9, Ti;
		    {
			 E T1, T2, Ta, Tb;
			 T1 = Rp[0];
			 T2 = Rm[WS(rs, 1)];
			 T3 = T1 + T2;
			 Tf = T1 - T2;
			 Ta = Ip[0];
			 Tb = Im[WS(rs, 1)];
			 Tc = Ta + Tb;
			 Tl = Ta - Tb;
		    }
		    {
			 E T4, T5, Tg, Th;
			 T4 = Rp[WS(rs, 1)];
			 T5 = Rm[0];
			 T6 = T4 + T5;
			 T9 = T4 - T5;
			 Tg = Ip[WS(rs, 1)];
			 Th = Im[0];
			 Ti = Tg + Th;
			 Tm = Tg - Th;
		    }
		    Td = T9 + Tc;
		    Tj = Tf - Ti;
		    Tx = Tf + Ti;
		    Tv = Tc - T9;
		    Ts = Tl - Tm;
		    Tq = T3 - T6;
	       }
	       {
		    E T7, Tn, Tk, To, T8, Te;
		    T7 = T3 + T6;
		    Tn = Tl + Tm;
		    T8 = W[0];
		    Te = W[1];
		    Tk = FMA(T8, Td, Te * Tj);
		    To = FNMS(Te, Td, T8 * Tj);
		    Rp[0] = T7 - Tk;
		    Ip[0] = Tn + To;
		    Rm[0] = T7 + Tk;
		    Im[0] = To - Tn;
	       }
	       {
		    E Tt, Tz, Ty, TA;
		    {
			 E Tp, Tr, Tu, Tw;
			 Tp = W[2];
			 Tr = W[3];
			 Tt = FNMS(Tr, Ts, Tp * Tq);
			 Tz = FMA(Tr, Tq, Tp * Ts);
			 Tu = W[4];
			 Tw = W[5];
			 Ty = FMA(Tu, Tv, Tw * Tx);
			 TA = FNMS(Tw, Tv, Tu * Tx);
		    }
		    Rp[WS(rs, 1)] = Tt - Ty;
		    Ip[WS(rs, 1)] = Tz + TA;
		    Rm[WS(rs, 1)] = Tt + Ty;
		    Im[WS(rs, 1)] = TA - Tz;
	       }
	  }
     }
}

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

static const hc2c_desc desc = { 4, "hc2cbdft2_4", twinstr, &GENUS, {24, 6, 6, 0} };

void X(codelet_hc2cbdft2_4) (planner *p) {
     X(khc2c_register) (p, hc2cbdft2_4, &desc, HC2C_VIA_DFT);
}
#endif