ref: d6839757dffdf592ae300726a64e0f3199a9cd56
dir: /libfaad/fftw/ftw_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 20:44:34 EST 1999 */
#include <fftw-int.h>
#include <fftw.h>
/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -twiddle 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: ftw_8.c,v 1.1 2002/04/07 21:26:05 menno Exp $
* $Id: ftw_8.c,v 1.1 2002/04/07 21:26:05 menno Exp $
* $Id: ftw_8.c,v 1.1 2002/04/07 21:26:05 menno Exp $
*/
void fftw_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 tmp76;
fftw_real tmp41;
fftw_real tmp53;
fftw_real tmp56;
fftw_real tmp65;
fftw_real tmp18;
fftw_real tmp77;
fftw_real tmp46;
fftw_real tmp68;
fftw_real tmp30;
fftw_real tmp48;
fftw_real tmp51;
fftw_real tmp64;
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 = (tmp4 * tmp3) + (tmp2 * tmp5);
}
tmp7 = tmp1 + tmp6;
tmp43 = tmp1 - tmp6;
tmp71 = tmp69 + tmp70;
tmp76 = 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 = (tmp33 * tmp32) + (tmp31 * tmp34);
}
{
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 = (tmp38 * tmp37) + (tmp36 * tmp39);
}
tmp41 = tmp35 + tmp40;
tmp53 = tmp35 - tmp40;
tmp56 = tmp54 - tmp55;
tmp65 = 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 = (tmp10 * tmp9) + (tmp8 * tmp11);
}
{
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 = (tmp15 * tmp14) + (tmp13 * tmp16);
}
tmp18 = tmp12 + tmp17;
tmp77 = 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 = (tmp22 * tmp21) + (tmp20 * tmp23);
}
{
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 = (tmp27 * tmp26) + (tmp25 * tmp28);
}
tmp30 = tmp24 + tmp29;
tmp48 = tmp24 - tmp29;
tmp51 = tmp49 - tmp50;
tmp64 = 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 = tmp41 - tmp30;
tmp74 = tmp71 - tmp68;
c_im(inout[2 * iostride]) = tmp73 + tmp74;
c_im(inout[6 * iostride]) = tmp74 - tmp73;
tmp67 = tmp64 + tmp65;
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 = tmp51 - tmp48;
tmp61 = tmp53 + tmp56;
tmp62 = K707106781 * (tmp60 - tmp61);
tmp75 = K707106781 * (tmp60 + tmp61);
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 * (tmp57 - tmp52);
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 fftw_twiddle_8_desc =
{
"fftw_twiddle_8",
(void (*)()) fftw_twiddle_8,
8,
FFTW_FORWARD,
FFTW_TWIDDLE,
176,
7,
twiddle_order,
};