annotate src/fftw-3.3.8/dft/simd/common/n1fv_4.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 08:04:51 EDT 2018 */

#include "dft/codelet-dft.h"

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

/* Generated by: ../../../genfft/gen_notw_c.native -fma -simd -compact -variables 4 -pipeline-latency 8 -n 4 -name n1fv_4 -include dft/simd/n1f.h */

/*
 * This function contains 8 FP additions, 2 FP multiplications,
 * (or, 6 additions, 0 multiplications, 2 fused multiply/add),
 * 11 stack variables, 0 constants, and 8 memory accesses
 */
#include "dft/simd/n1f.h"

static void n1fv_4(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, INT v, INT ivs, INT ovs)
{
     {
	  INT i;
	  const R *xi;
	  R *xo;
	  xi = ri;
	  xo = ro;
	  for (i = v; i > 0; i = i - VL, xi = xi + (VL * ivs), xo = xo + (VL * ovs), MAKE_VOLATILE_STRIDE(8, is), MAKE_VOLATILE_STRIDE(8, os)) {
	       V T3, T7, T6, T8;
	       {
		    V T1, T2, T4, T5;
		    T1 = LD(&(xi[0]), ivs, &(xi[0]));
		    T2 = LD(&(xi[WS(is, 2)]), ivs, &(xi[0]));
		    T3 = VSUB(T1, T2);
		    T7 = VADD(T1, T2);
		    T4 = LD(&(xi[WS(is, 1)]), ivs, &(xi[WS(is, 1)]));
		    T5 = LD(&(xi[WS(is, 3)]), ivs, &(xi[WS(is, 1)]));
		    T6 = VSUB(T4, T5);
		    T8 = VADD(T4, T5);
	       }
	       ST(&(xo[WS(os, 1)]), VFNMSI(T6, T3), ovs, &(xo[WS(os, 1)]));
	       ST(&(xo[0]), VADD(T7, T8), ovs, &(xo[0]));
	       ST(&(xo[WS(os, 3)]), VFMAI(T6, T3), ovs, &(xo[WS(os, 1)]));
	       ST(&(xo[WS(os, 2)]), VSUB(T7, T8), ovs, &(xo[0]));
	  }
     }
     VLEAVE();
}

static const kdft_desc desc = { 4, XSIMD_STRING("n1fv_4"), {6, 0, 2, 0}, &GENUS, 0, 0, 0, 0 };

void XSIMD(codelet_n1fv_4) (planner *p) {
     X(kdft_register) (p, n1fv_4, &desc);
}

#else

/* Generated by: ../../../genfft/gen_notw_c.native -simd -compact -variables 4 -pipeline-latency 8 -n 4 -name n1fv_4 -include dft/simd/n1f.h */

/*
 * This function contains 8 FP additions, 0 FP multiplications,
 * (or, 8 additions, 0 multiplications, 0 fused multiply/add),
 * 11 stack variables, 0 constants, and 8 memory accesses
 */
#include "dft/simd/n1f.h"

static void n1fv_4(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, INT v, INT ivs, INT ovs)
{
     {
	  INT i;
	  const R *xi;
	  R *xo;
	  xi = ri;
	  xo = ro;
	  for (i = v; i > 0; i = i - VL, xi = xi + (VL * ivs), xo = xo + (VL * ovs), MAKE_VOLATILE_STRIDE(8, is), MAKE_VOLATILE_STRIDE(8, os)) {
	       V T3, T7, T6, T8;
	       {
		    V T1, T2, T4, T5;
		    T1 = LD(&(xi[0]), ivs, &(xi[0]));
		    T2 = LD(&(xi[WS(is, 2)]), ivs, &(xi[0]));
		    T3 = VSUB(T1, T2);
		    T7 = VADD(T1, T2);
		    T4 = LD(&(xi[WS(is, 1)]), ivs, &(xi[WS(is, 1)]));
		    T5 = LD(&(xi[WS(is, 3)]), ivs, &(xi[WS(is, 1)]));
		    T6 = VBYI(VSUB(T4, T5));
		    T8 = VADD(T4, T5);
	       }
	       ST(&(xo[WS(os, 1)]), VSUB(T3, T6), ovs, &(xo[WS(os, 1)]));
	       ST(&(xo[0]), VADD(T7, T8), ovs, &(xo[0]));
	       ST(&(xo[WS(os, 3)]), VADD(T3, T6), ovs, &(xo[WS(os, 1)]));
	       ST(&(xo[WS(os, 2)]), VSUB(T7, T8), ovs, &(xo[0]));
	  }
     }
     VLEAVE();
}

static const kdft_desc desc = { 4, XSIMD_STRING("n1fv_4"), {8, 0, 0, 0}, &GENUS, 0, 0, 0, 0 };

void XSIMD(codelet_n1fv_4) (planner *p) {
     X(kdft_register) (p, n1fv_4, &desc);
}

#endif