annotate src/fftw-3.3.8/rdft/scalar/r2cf/hc2cfdft_2.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 08:07:10 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 -n 2 -dit -name hc2cfdft_2 -include rdft/scalar/hc2cf.h */

/*
 * This function contains 10 FP additions, 8 FP multiplications,
 * (or, 8 additions, 6 multiplications, 2 fused multiply/add),
 * 16 stack variables, 1 constants, and 8 memory accesses
 */
#include "rdft/scalar/hc2cf.h"

static void hc2cfdft_2(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) * 2); m < me; m = m + 1, Rp = Rp + ms, Ip = Ip + ms, Rm = Rm - ms, Im = Im - ms, W = W + 2, MAKE_VOLATILE_STRIDE(8, rs)) {
	       E T3, Ta, Tc, T9, Td, T4, T8, Tb, Te;
	       {
		    E T1, T2, T5, T6, T7;
		    T1 = Ip[0];
		    T2 = Im[0];
		    T3 = T1 - T2;
		    Ta = T1 + T2;
		    T5 = Rm[0];
		    T6 = Rp[0];
		    T7 = T5 - T6;
		    Tc = T6 + T5;
		    T9 = W[1];
		    Td = T9 * T7;
		    T4 = W[0];
		    T8 = T4 * T7;
	       }
	       Tb = FNMS(T9, Ta, T8);
	       Ip[0] = KP500000000 * (T3 + Tb);
	       Im[0] = KP500000000 * (Tb - T3);
	       Te = FMA(T4, Ta, Td);
	       Rm[0] = KP500000000 * (Tc - Te);
	       Rp[0] = KP500000000 * (Tc + Te);
	  }
     }
}

static const tw_instr twinstr[] = {
     {TW_FULL, 1, 2},
     {TW_NEXT, 1, 0}
};

static const hc2c_desc desc = { 2, "hc2cfdft_2", twinstr, &GENUS, {8, 6, 2, 0} };

void X(codelet_hc2cfdft_2) (planner *p) {
     X(khc2c_register) (p, hc2cfdft_2, &desc, HC2C_VIA_DFT);
}
#else

/* Generated by: ../../../genfft/gen_hc2cdft.native -compact -variables 4 -pipeline-latency 4 -n 2 -dit -name hc2cfdft_2 -include rdft/scalar/hc2cf.h */

/*
 * This function contains 10 FP additions, 8 FP multiplications,
 * (or, 8 additions, 6 multiplications, 2 fused multiply/add),
 * 10 stack variables, 1 constants, and 8 memory accesses
 */
#include "rdft/scalar/hc2cf.h"

static void hc2cfdft_2(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) * 2); m < me; m = m + 1, Rp = Rp + ms, Ip = Ip + ms, Rm = Rm - ms, Im = Im - ms, W = W + 2, MAKE_VOLATILE_STRIDE(8, rs)) {
	       E T3, T9, T7, Tb;
	       {
		    E T1, T2, T5, T6;
		    T1 = Ip[0];
		    T2 = Im[0];
		    T3 = T1 - T2;
		    T9 = T1 + T2;
		    T5 = Rm[0];
		    T6 = Rp[0];
		    T7 = T5 - T6;
		    Tb = T6 + T5;
	       }
	       {
		    E Ta, Tc, T4, T8;
		    T4 = W[0];
		    T8 = W[1];
		    Ta = FNMS(T8, T9, T4 * T7);
		    Tc = FMA(T8, T7, T4 * T9);
		    Ip[0] = KP500000000 * (T3 + Ta);
		    Rp[0] = KP500000000 * (Tb + Tc);
		    Im[0] = KP500000000 * (Ta - T3);
		    Rm[0] = KP500000000 * (Tb - Tc);
	       }
	  }
     }
}

static const tw_instr twinstr[] = {
     {TW_FULL, 1, 2},
     {TW_NEXT, 1, 0}
};

static const hc2c_desc desc = { 2, "hc2cfdft_2", twinstr, &GENUS, {8, 6, 2, 0} };

void X(codelet_hc2cfdft_2) (planner *p) {
     X(khc2c_register) (p, hc2cfdft_2, &desc, HC2C_VIA_DFT);
}
#endif