ftwi_16.c

FFTW, a collection of fast C routines to compute the Discrete Fourier Transform in one or more dime

/*
 * Copyright (c) 1997-1999, 2003 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/* This file was automatically generated --- DO NOT EDIT */
/* Generated on Mon Mar 24 02:08:35 EST 2003 */

#include "fftw-int.h"
#include "fftw.h"

/* Generated by: /homee/stevenj/cvs/fftw/gensrc/genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddleinv 16 */

/*
 * This function contains 174 FP additions, 84 FP multiplications,
 * (or, 136 additions, 46 multiplications, 38 fused multiply/add),
 * 50 stack variables, and 64 memory accesses
 */
static const fftw_real K382683432 =
FFTW_KONST(+0.382683432365089771728459984030398866761344562);
static const fftw_real K923879532 =
FFTW_KONST(+0.923879532511286756128183189396788286822416626);
static const fftw_real K707106781 =
FFTW_KONST(+0.707106781186547524400844362104849039284835938);

/*
 * Generator Id's : 
 * $Id: exprdag.ml,v 1.43 2003/03/16 23:43:46 stevenj Exp $
 * $Id: fft.ml,v 1.44 2003/03/16 23:43:46 stevenj Exp $
 * $Id: to_c.ml,v 1.26 2003/03/16 23:43:46 stevenj Exp $
 */

void fftwi_twiddle_16(fftw_complex *A, const fftw_complex *W, int iostride,
		      int m, int dist)
{
     int i;
     fftw_complex *inout;
     inout = A;
     for (i = m; i > 0; i = i - 1, inout = inout + dist, W = W + 15) {
	  fftw_real tmp7;
	  fftw_real tmp91;
	  fftw_real tmp180;
	  fftw_real tmp194;
	  fftw_real tmp18;
	  fftw_real tmp193;
	  fftw_real tmp94;
	  fftw_real tmp177;
	  fftw_real tmp77;
	  fftw_real tmp88;
	  fftw_real tmp161;
	  fftw_real tmp117;
	  fftw_real tmp141;
	  fftw_real tmp162;
	  fftw_real tmp163;
	  fftw_real tmp164;
	  fftw_real tmp112;
	  fftw_real tmp140;
	  fftw_real tmp30;
	  fftw_real tmp153;
	  fftw_real tmp100;
	  fftw_real tmp137;
	  fftw_real tmp41;
	  fftw_real tmp152;
	  fftw_real tmp105;
	  fftw_real tmp136;
	  fftw_real tmp54;
	  fftw_real tmp65;
	  fftw_real tmp156;
	  fftw_real tmp128;
	  fftw_real tmp144;
	  fftw_real tmp157;
	  fftw_real tmp158;
	  fftw_real tmp159;
	  fftw_real tmp123;
	  fftw_real tmp143;
	  ASSERT_ALIGNED_DOUBLE;
	  {
	       fftw_real tmp1;
	       fftw_real tmp179;
	       fftw_real tmp6;
	       fftw_real tmp178;
	       ASSERT_ALIGNED_DOUBLE;
	       tmp1 = c_re(inout[0]);
	       tmp179 = c_im(inout[0]);
	       {
		    fftw_real tmp3;
		    fftw_real tmp5;
		    fftw_real tmp2;
		    fftw_real tmp4;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp3 = c_re(inout[8 * iostride]);
		    tmp5 = c_im(inout[8 * iostride]);
		    tmp2 = c_re(W[7]);
		    tmp4 = c_im(W[7]);
		    tmp6 = (tmp2 * tmp3) + (tmp4 * tmp5);
		    tmp178 = (tmp2 * tmp5) - (tmp4 * tmp3);
	       }
	       tmp7 = tmp1 + tmp6;
	       tmp91 = tmp1 - tmp6;
	       tmp180 = tmp178 + tmp179;
	       tmp194 = tmp179 - tmp178;
	  }
	  {
	       fftw_real tmp12;
	       fftw_real tmp92;
	       fftw_real tmp17;
	       fftw_real tmp93;
	       ASSERT_ALIGNED_DOUBLE;
	       {
		    fftw_real tmp9;
		    fftw_real tmp11;
		    fftw_real tmp8;
		    fftw_real tmp10;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp9 = c_re(inout[4 * iostride]);
		    tmp11 = c_im(inout[4 * iostride]);
		    tmp8 = c_re(W[3]);
		    tmp10 = c_im(W[3]);
		    tmp12 = (tmp8 * tmp9) + (tmp10 * tmp11);
		    tmp92 = (tmp8 * tmp11) - (tmp10 * tmp9);
	       }
	       {
		    fftw_real tmp14;
		    fftw_real tmp16;
		    fftw_real tmp13;
		    fftw_real tmp15;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp14 = c_re(inout[12 * iostride]);
		    tmp16 = c_im(inout[12 * iostride]);
		    tmp13 = c_re(W[11]);
		    tmp15 = c_im(W[11]);
		    tmp17 = (tmp13 * tmp14) + (tmp15 * tmp16);
		    tmp93 = (tmp13 * tmp16) - (tmp15 * tmp14);
	       }
	       tmp18 = tmp12 + tmp17;
	       tmp193 = tmp12 - tmp17;
	       tmp94 = tmp92 - tmp93;
	       tmp177 = tmp92 + tmp93;
	  }
	  {
	       fftw_real tmp71;
	       fftw_real tmp108;
	       fftw_real tmp87;
	       fftw_real tmp115;
	       fftw_real tmp76;
	       fftw_real tmp109;
	       fftw_real tmp82;
	       fftw_real tmp114;
	       ASSERT_ALIGNED_DOUBLE;
	       {
		    fftw_real tmp68;
		    fftw_real tmp70;
		    fftw_real tmp67;
		    fftw_real tmp69;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp68 = c_re(inout[15 * iostride]);
		    tmp70 = c_im(inout[15 * iostride]);
		    tmp67 = c_re(W[14]);
		    tmp69 = c_im(W[14]);
		    tmp71 = (tmp67 * tmp68) + (tmp69 * tmp70);
		    tmp108 = (tmp67 * tmp70) - (tmp69 * tmp68);
	       }
	       {
		    fftw_real tmp84;
		    fftw_real tmp86;
		    fftw_real tmp83;
		    fftw_real tmp85;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp84 = c_re(inout[11 * iostride]);
		    tmp86 = c_im(inout[11 * iostride]);
		    tmp83 = c_re(W[10]);
		    tmp85 = c_im(W[10]);
		    tmp87 = (tmp83 * tmp84) + (tmp85 * tmp86);
		    tmp115 = (tmp83 * tmp86) - (tmp85 * tmp84);
	       }
	       {
		    fftw_real tmp73;
		    fftw_real tmp75;
		    fftw_real tmp72;
		    fftw_real tmp74;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp73 = c_re(inout[7 * iostride]);
		    tmp75 = c_im(inout[7 * iostride]);
		    tmp72 = c_re(W[6]);
		    tmp74 = c_im(W[6]);
		    tmp76 = (tmp72 * tmp73) + (tmp74 * tmp75);
		    tmp109 = (tmp72 * tmp75) - (tmp74 * tmp73);
	       }
	       {
		    fftw_real tmp79;
		    fftw_real tmp81;
		    fftw_real tmp78;
		    fftw_real tmp80;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp79 = c_re(inout[3 * iostride]);
		    tmp81 = c_im(inout[3 * iostride]);
		    tmp78 = c_re(W[2]);
		    tmp80 = c_im(W[2]);
		    tmp82 = (tmp78 * tmp79) + (tmp80 * tmp81);
		    tmp114 = (tmp78 * tmp81) - (tmp80 * tmp79);
	       }
	       {
		    fftw_real tmp113;
		    fftw_real tmp116;
		    fftw_real tmp110;
		    fftw_real tmp111;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp77 = tmp71 + tmp76;
		    tmp88 = tmp82 + tmp87;
		    tmp161 = tmp77 - tmp88;
		    tmp113 = tmp71 - tmp76;
		    tmp116 = tmp114 - tmp115;
		    tmp117 = tmp113 - tmp116;
		    tmp141 = tmp113 + tmp116;
		    tmp162 = tmp108 + tmp109;
		    tmp163 = tmp114 + tmp115;
		    tmp164 = tmp162 - tmp163;
		    tmp110 = tmp108 - tmp109;
		    tmp111 = tmp82 - tmp87;
		    tmp112 = tmp110 + tmp111;
		    tmp140 = tmp110 - tmp111;
	       }
	  }
	  {
	       fftw_real tmp24;
	       fftw_real tmp97;
	       fftw_real tmp29;
	       fftw_real tmp98;
	       fftw_real tmp96;
	       fftw_real tmp99;
	       ASSERT_ALIGNED_DOUBLE;
	       {
		    fftw_real tmp21;
		    fftw_real tmp23;
		    fftw_real tmp20;
		    fftw_real tmp22;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp21 = c_re(inout[2 * iostride]);
		    tmp23 = c_im(inout[2 * iostride]);
		    tmp20 = c_re(W[1]);
		    tmp22 = c_im(W[1]);
		    tmp24 = (tmp20 * tmp21) + (tmp22 * tmp23);
		    tmp97 = (tmp20 * tmp23) - (tmp22 * tmp21);
	       }
	       {
		    fftw_real tmp26;
		    fftw_real tmp28;
		    fftw_real tmp25;
		    fftw_real tmp27;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp26 = c_re(inout[10 * iostride]);
		    tmp28 = c_im(inout[10 * iostride]);
		    tmp25 = c_re(W[9]);
		    tmp27 = c_im(W[9]);
		    tmp29 = (tmp25 * tmp26) + (tmp27 * tmp28);
		    tmp98 = (tmp25 * tmp28) - (tmp27 * tmp26);
	       }
	       tmp30 = tmp24 + tmp29;
	       tmp153 = tmp97 + tmp98;
	       tmp96 = tmp24 - tmp29;
	       tmp99 = tmp97 - tmp98;
	       tmp100 = tmp96 - tmp99;
	       tmp137 = tmp96 + tmp99;
	  }
	  {
	       fftw_real tmp35;
	       fftw_real tmp102;
	       fftw_real tmp40;
	       fftw_real tmp103;
	       fftw_real tmp101;
	       fftw_real tmp104;
	       ASSERT_ALIGNED_DOUBLE;
	       {
		    fftw_real tmp32;
		    fftw_real tmp34;
		    fftw_real tmp31;
		    fftw_real tmp33;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp32 = c_re(inout[14 * iostride]);
		    tmp34 = c_im(inout[14 * iostride]);
		    tmp31 = c_re(W[13]);
		    tmp33 = c_im(W[13]);
		    tmp35 = (tmp31 * tmp32) + (tmp33 * tmp34);
		    tmp102 = (tmp31 * tmp34) - (tmp33 * tmp32);
	       }
	       {
		    fftw_real tmp37;
		    fftw_real tmp39;
		    fftw_real tmp36;
		    fftw_real tmp38;
		    ASSERT_ALIGNED_DOUBLE;
		    tmp37 = c_re(inout[6 * iostride]);
		    tmp39 = c_im(inout[6 * iostride]);
		    tmp36 = c_re(W[5]);