Logo Search packages:      
Sourcecode: fftw version File versions  Download package

ftwi_8.c

/*
 * Copyright (c) 1997-1999 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 Sun Nov  7 20:44:58 EST 1999 */

#include <fftw-int.h>
#include <fftw.h>

/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddleinv 8 */

/*
 * This function contains 66 FP additions, 32 FP multiplications,
 * (or, 52 additions, 18 multiplications, 14 fused multiply/add),
 * 28 stack variables, and 32 memory accesses
 */
static const fftw_real K707106781 = FFTW_KONST(+0.707106781186547524400844362104849039284835938);

/*
 * Generator Id's : 
 * $Id: exprdag.ml,v 1.41 1999/05/26 15:44:14 fftw Exp $
 * $Id: fft.ml,v 1.43 1999/05/17 19:44:18 fftw Exp $
 * $Id: to_c.ml,v 1.25 1999/10/26 21:41:32 stevenj Exp $
 */

void fftwi_twiddle_8(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 + 7) {
        fftw_real tmp7;
        fftw_real tmp43;
        fftw_real tmp71;
        fftw_real tmp77;
        fftw_real tmp41;
        fftw_real tmp53;
        fftw_real tmp56;
        fftw_real tmp64;
        fftw_real tmp18;
        fftw_real tmp76;
        fftw_real tmp46;
        fftw_real tmp68;
        fftw_real tmp30;
        fftw_real tmp48;
        fftw_real tmp51;
        fftw_real tmp65;
        ASSERT_ALIGNED_DOUBLE;
        {
             fftw_real tmp1;
             fftw_real tmp70;
             fftw_real tmp6;
             fftw_real tmp69;
             ASSERT_ALIGNED_DOUBLE;
             tmp1 = c_re(inout[0]);
             tmp70 = c_im(inout[0]);
             {
                fftw_real tmp3;
                fftw_real tmp5;
                fftw_real tmp2;
                fftw_real tmp4;
                ASSERT_ALIGNED_DOUBLE;
                tmp3 = c_re(inout[4 * iostride]);
                tmp5 = c_im(inout[4 * iostride]);
                tmp2 = c_re(W[3]);
                tmp4 = c_im(W[3]);
                tmp6 = (tmp2 * tmp3) + (tmp4 * tmp5);
                tmp69 = (tmp2 * tmp5) - (tmp4 * tmp3);
             }
             tmp7 = tmp1 + tmp6;
             tmp43 = tmp1 - tmp6;
             tmp71 = tmp69 + tmp70;
             tmp77 = tmp70 - tmp69;
        }
        {
             fftw_real tmp35;
             fftw_real tmp54;
             fftw_real tmp40;
             fftw_real tmp55;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp32;
                fftw_real tmp34;
                fftw_real tmp31;
                fftw_real tmp33;
                ASSERT_ALIGNED_DOUBLE;
                tmp32 = c_re(inout[7 * iostride]);
                tmp34 = c_im(inout[7 * iostride]);
                tmp31 = c_re(W[6]);
                tmp33 = c_im(W[6]);
                tmp35 = (tmp31 * tmp32) + (tmp33 * tmp34);
                tmp54 = (tmp31 * tmp34) - (tmp33 * tmp32);
             }
             {
                fftw_real tmp37;
                fftw_real tmp39;
                fftw_real tmp36;
                fftw_real tmp38;
                ASSERT_ALIGNED_DOUBLE;
                tmp37 = c_re(inout[3 * iostride]);
                tmp39 = c_im(inout[3 * iostride]);
                tmp36 = c_re(W[2]);
                tmp38 = c_im(W[2]);
                tmp40 = (tmp36 * tmp37) + (tmp38 * tmp39);
                tmp55 = (tmp36 * tmp39) - (tmp38 * tmp37);
             }
             tmp41 = tmp35 + tmp40;
             tmp53 = tmp35 - tmp40;
             tmp56 = tmp54 - tmp55;
             tmp64 = tmp54 + tmp55;
        }
        {
             fftw_real tmp12;
             fftw_real tmp44;
             fftw_real tmp17;
             fftw_real tmp45;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp9;
                fftw_real tmp11;
                fftw_real tmp8;
                fftw_real tmp10;
                ASSERT_ALIGNED_DOUBLE;
                tmp9 = c_re(inout[2 * iostride]);
                tmp11 = c_im(inout[2 * iostride]);
                tmp8 = c_re(W[1]);
                tmp10 = c_im(W[1]);
                tmp12 = (tmp8 * tmp9) + (tmp10 * tmp11);
                tmp44 = (tmp8 * tmp11) - (tmp10 * tmp9);
             }
             {
                fftw_real tmp14;
                fftw_real tmp16;
                fftw_real tmp13;
                fftw_real tmp15;
                ASSERT_ALIGNED_DOUBLE;
                tmp14 = c_re(inout[6 * iostride]);
                tmp16 = c_im(inout[6 * iostride]);
                tmp13 = c_re(W[5]);
                tmp15 = c_im(W[5]);
                tmp17 = (tmp13 * tmp14) + (tmp15 * tmp16);
                tmp45 = (tmp13 * tmp16) - (tmp15 * tmp14);
             }
             tmp18 = tmp12 + tmp17;
             tmp76 = tmp12 - tmp17;
             tmp46 = tmp44 - tmp45;
             tmp68 = tmp44 + tmp45;
        }
        {
             fftw_real tmp24;
             fftw_real tmp49;
             fftw_real tmp29;
             fftw_real tmp50;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp21;
                fftw_real tmp23;
                fftw_real tmp20;
                fftw_real tmp22;
                ASSERT_ALIGNED_DOUBLE;
                tmp21 = c_re(inout[iostride]);
                tmp23 = c_im(inout[iostride]);
                tmp20 = c_re(W[0]);
                tmp22 = c_im(W[0]);
                tmp24 = (tmp20 * tmp21) + (tmp22 * tmp23);
                tmp49 = (tmp20 * tmp23) - (tmp22 * tmp21);
             }
             {
                fftw_real tmp26;
                fftw_real tmp28;
                fftw_real tmp25;
                fftw_real tmp27;
                ASSERT_ALIGNED_DOUBLE;
                tmp26 = c_re(inout[5 * iostride]);
                tmp28 = c_im(inout[5 * iostride]);
                tmp25 = c_re(W[4]);
                tmp27 = c_im(W[4]);
                tmp29 = (tmp25 * tmp26) + (tmp27 * tmp28);
                tmp50 = (tmp25 * tmp28) - (tmp27 * tmp26);
             }
             tmp30 = tmp24 + tmp29;
             tmp48 = tmp24 - tmp29;
             tmp51 = tmp49 - tmp50;
             tmp65 = tmp49 + tmp50;
        }
        {
             fftw_real tmp19;
             fftw_real tmp42;
             fftw_real tmp63;
             fftw_real tmp66;
             ASSERT_ALIGNED_DOUBLE;
             tmp19 = tmp7 + tmp18;
             tmp42 = tmp30 + tmp41;
             c_re(inout[4 * iostride]) = tmp19 - tmp42;
             c_re(inout[0]) = tmp19 + tmp42;
             {
                fftw_real tmp73;
                fftw_real tmp74;
                fftw_real tmp67;
                fftw_real tmp72;
                ASSERT_ALIGNED_DOUBLE;
                tmp73 = tmp30 - tmp41;
                tmp74 = tmp71 - tmp68;
                c_im(inout[2 * iostride]) = tmp73 + tmp74;
                c_im(inout[6 * iostride]) = tmp74 - tmp73;
                tmp67 = tmp65 + tmp64;
                tmp72 = tmp68 + tmp71;
                c_im(inout[0]) = tmp67 + tmp72;
                c_im(inout[4 * iostride]) = tmp72 - tmp67;
             }
             tmp63 = tmp7 - tmp18;
             tmp66 = tmp64 - tmp65;
             c_re(inout[6 * iostride]) = tmp63 - tmp66;
             c_re(inout[2 * iostride]) = tmp63 + tmp66;
             {
                fftw_real tmp59;
                fftw_real tmp78;
                fftw_real tmp62;
                fftw_real tmp75;
                fftw_real tmp60;
                fftw_real tmp61;
                ASSERT_ALIGNED_DOUBLE;
                tmp59 = tmp43 + tmp46;
                tmp78 = tmp76 + tmp77;
                tmp60 = tmp56 - tmp53;
                tmp61 = tmp48 + tmp51;
                tmp62 = K707106781 * (tmp60 - tmp61);
                tmp75 = K707106781 * (tmp61 + tmp60);
                c_re(inout[7 * iostride]) = tmp59 - tmp62;
                c_re(inout[3 * iostride]) = tmp59 + tmp62;
                c_im(inout[iostride]) = tmp75 + tmp78;
                c_im(inout[5 * iostride]) = tmp78 - tmp75;
             }
             {
                fftw_real tmp47;
                fftw_real tmp80;
                fftw_real tmp58;
                fftw_real tmp79;
                fftw_real tmp52;
                fftw_real tmp57;
                ASSERT_ALIGNED_DOUBLE;
                tmp47 = tmp43 - tmp46;
                tmp80 = tmp77 - tmp76;
                tmp52 = tmp48 - tmp51;
                tmp57 = tmp53 + tmp56;
                tmp58 = K707106781 * (tmp52 + tmp57);
                tmp79 = K707106781 * (tmp52 - tmp57);
                c_re(inout[5 * iostride]) = tmp47 - tmp58;
                c_re(inout[iostride]) = tmp47 + tmp58;
                c_im(inout[3 * iostride]) = tmp79 + tmp80;
                c_im(inout[7 * iostride]) = tmp80 - tmp79;
             }
        }
     }
}

static const int twiddle_order[] =
{1, 2, 3, 4, 5, 6, 7};
fftw_codelet_desc fftwi_twiddle_8_desc =
{
     "fftwi_twiddle_8",
     (void (*)()) fftwi_twiddle_8,
     8,
     FFTW_BACKWARD,
     FFTW_TWIDDLE,
     187,
     7,
     twiddle_order,
};

Generated by  Doxygen 1.6.0   Back to index