annotate fft/fftw/fftw-3.3.4/dft/simd/common/n2fv_6.c @ 40:223f770b5341 kissfft-double tip

Try a double-precision kissfft

/*
 * 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 Tue Mar  4 13:46:54 EST 2014 */

#include "codelet-dft.h"

#ifdef HAVE_FMA

/* Generated by: ../../../genfft/gen_notw_c.native -fma -reorder-insns -schedule-for-pipeline -simd -compact -variables 4 -pipeline-latency 8 -n 6 -name n2fv_6 -with-ostride 2 -include n2f.h -store-multiple 2 */

/*
 * This function contains 18 FP additions, 8 FP multiplications,
 * (or, 12 additions, 2 multiplications, 6 fused multiply/add),
 * 29 stack variables, 2 constants, and 15 memory accesses
 */
#include "n2f.h"

static void n2fv_6(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, INT v, INT ivs, INT ovs)
{
     DVK(KP500000000, +0.500000000000000000000000000000000000000000000);
     DVK(KP866025403, +0.866025403784438646763723170752936183471402627);
     {
	  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(12, is), MAKE_VOLATILE_STRIDE(12, os)) {
	       V T1, T2, T4, T5, T7, T8;
	       T1 = LD(&(xi[0]), ivs, &(xi[0]));
	       T2 = LD(&(xi[WS(is, 3)]), ivs, &(xi[WS(is, 1)]));
	       T4 = LD(&(xi[WS(is, 2)]), ivs, &(xi[0]));
	       T5 = LD(&(xi[WS(is, 5)]), ivs, &(xi[WS(is, 1)]));
	       T7 = LD(&(xi[WS(is, 4)]), ivs, &(xi[0]));
	       T8 = LD(&(xi[WS(is, 1)]), ivs, &(xi[WS(is, 1)]));
	       {
		    V T3, Td, T6, Te, T9, Tf;
		    T3 = VSUB(T1, T2);
		    Td = VADD(T1, T2);
		    T6 = VSUB(T4, T5);
		    Te = VADD(T4, T5);
		    T9 = VSUB(T7, T8);
		    Tf = VADD(T7, T8);
		    {
			 V Tg, Ti, Ta, Tc;
			 Tg = VADD(Te, Tf);
			 Ti = VMUL(LDK(KP866025403), VSUB(Tf, Te));
			 Ta = VADD(T6, T9);
			 Tc = VMUL(LDK(KP866025403), VSUB(T9, T6));
			 {
			      V Th, Tj, Tb, Tk;
			      Th = VFNMS(LDK(KP500000000), Tg, Td);
			      Tj = VADD(Td, Tg);
			      STM2(&(xo[0]), Tj, ovs, &(xo[0]));
			      Tb = VFNMS(LDK(KP500000000), Ta, T3);
			      Tk = VADD(T3, Ta);
			      STM2(&(xo[6]), Tk, ovs, &(xo[2]));
			      {
				   V Tl, Tm, Tn, To;
				   Tl = VFMAI(Ti, Th);
				   STM2(&(xo[8]), Tl, ovs, &(xo[0]));
				   Tm = VFNMSI(Ti, Th);
				   STM2(&(xo[4]), Tm, ovs, &(xo[0]));
				   STN2(&(xo[4]), Tm, Tk, ovs);
				   Tn = VFMAI(Tc, Tb);
				   STM2(&(xo[2]), Tn, ovs, &(xo[2]));
				   STN2(&(xo[0]), Tj, Tn, ovs);
				   To = VFNMSI(Tc, Tb);
				   STM2(&(xo[10]), To, ovs, &(xo[2]));
				   STN2(&(xo[8]), Tl, To, ovs);
			      }
			 }
		    }
	       }
	  }
     }
     VLEAVE();
}

static const kdft_desc desc = { 6, XSIMD_STRING("n2fv_6"), {12, 2, 6, 0}, &GENUS, 0, 2, 0, 0 };

void XSIMD(codelet_n2fv_6) (planner *p) {
     X(kdft_register) (p, n2fv_6, &desc);
}

#else				/* HAVE_FMA */

/* Generated by: ../../../genfft/gen_notw_c.native -simd -compact -variables 4 -pipeline-latency 8 -n 6 -name n2fv_6 -with-ostride 2 -include n2f.h -store-multiple 2 */

/*
 * This function contains 18 FP additions, 4 FP multiplications,
 * (or, 16 additions, 2 multiplications, 2 fused multiply/add),
 * 25 stack variables, 2 constants, and 15 memory accesses
 */
#include "n2f.h"

static void n2fv_6(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, INT v, INT ivs, INT ovs)
{
     DVK(KP866025403, +0.866025403784438646763723170752936183471402627);
     DVK(KP500000000, +0.500000000000000000000000000000000000000000000);
     {
	  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(12, is), MAKE_VOLATILE_STRIDE(12, os)) {
	       V T3, Td, T6, Te, T9, Tf, Ta, Tg, T1, T2, Tj, Tk;
	       T1 = LD(&(xi[0]), ivs, &(xi[0]));
	       T2 = LD(&(xi[WS(is, 3)]), ivs, &(xi[WS(is, 1)]));
	       T3 = VSUB(T1, T2);
	       Td = VADD(T1, T2);
	       {
		    V T4, T5, T7, T8;
		    T4 = LD(&(xi[WS(is, 2)]), ivs, &(xi[0]));
		    T5 = LD(&(xi[WS(is, 5)]), ivs, &(xi[WS(is, 1)]));
		    T6 = VSUB(T4, T5);
		    Te = VADD(T4, T5);
		    T7 = LD(&(xi[WS(is, 4)]), ivs, &(xi[0]));
		    T8 = LD(&(xi[WS(is, 1)]), ivs, &(xi[WS(is, 1)]));
		    T9 = VSUB(T7, T8);
		    Tf = VADD(T7, T8);
	       }
	       Ta = VADD(T6, T9);
	       Tg = VADD(Te, Tf);
	       Tj = VADD(T3, Ta);
	       STM2(&(xo[6]), Tj, ovs, &(xo[2]));
	       Tk = VADD(Td, Tg);
	       STM2(&(xo[0]), Tk, ovs, &(xo[0]));
	       {
		    V Tl, Tb, Tc, Tm;
		    Tb = VFNMS(LDK(KP500000000), Ta, T3);
		    Tc = VBYI(VMUL(LDK(KP866025403), VSUB(T9, T6)));
		    Tl = VSUB(Tb, Tc);
		    STM2(&(xo[10]), Tl, ovs, &(xo[2]));
		    Tm = VADD(Tb, Tc);
		    STM2(&(xo[2]), Tm, ovs, &(xo[2]));
		    STN2(&(xo[0]), Tk, Tm, ovs);
		    {
			 V Th, Ti, Tn, To;
			 Th = VFNMS(LDK(KP500000000), Tg, Td);
			 Ti = VBYI(VMUL(LDK(KP866025403), VSUB(Tf, Te)));
			 Tn = VSUB(Th, Ti);
			 STM2(&(xo[4]), Tn, ovs, &(xo[0]));
			 STN2(&(xo[4]), Tn, Tj, ovs);
			 To = VADD(Th, Ti);
			 STM2(&(xo[8]), To, ovs, &(xo[0]));
			 STN2(&(xo[8]), To, Tl, ovs);
		    }
	       }
	  }
     }
     VLEAVE();
}

static const kdft_desc desc = { 6, XSIMD_STRING("n2fv_6"), {16, 2, 2, 0}, &GENUS, 0, 2, 0, 0 };

void XSIMD(codelet_n2fv_6) (planner *p) {
     X(kdft_register) (p, n2fv_6, &desc);
}

#endif				/* HAVE_FMA */