diff options
Diffstat (limited to 'src/fftw/ftw_3.c')
| -rw-r--r-- | src/fftw/ftw_3.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/fftw/ftw_3.c b/src/fftw/ftw_3.c new file mode 100644 index 0000000..63ea592 --- /dev/null +++ b/src/fftw/ftw_3.c @@ -0,0 +1,121 @@ +/* + * 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 02:07:31 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 -twiddle 3 */ + +/* + * This function contains 16 FP additions, 12 FP multiplications, + * (or, 10 additions, 6 multiplications, 6 fused multiply/add), + * 14 stack variables, and 12 memory accesses + */ +static const fftw_real K866025403 = +FFTW_KONST(+0.866025403784438646763723170752936183471402627); +static const fftw_real K500000000 = +FFTW_KONST(+0.500000000000000000000000000000000000000000000); + +/* + * Generator Id's : + * $Id: ftw_3.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: ftw_3.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: ftw_3.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + */ + +void fftw_twiddle_3(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 + 2) { + fftw_real tmp1; + fftw_real tmp18; + fftw_real tmp6; + fftw_real tmp14; + fftw_real tmp11; + fftw_real tmp15; + fftw_real tmp12; + fftw_real tmp17; + ASSERT_ALIGNED_DOUBLE; + tmp1 = c_re(inout[0]); + tmp18 = c_im(inout[0]); + { + fftw_real tmp3; + fftw_real tmp5; + fftw_real tmp2; + fftw_real tmp4; + ASSERT_ALIGNED_DOUBLE; + tmp3 = c_re(inout[iostride]); + tmp5 = c_im(inout[iostride]); + tmp2 = c_re(W[0]); + tmp4 = c_im(W[0]); + tmp6 = (tmp2 * tmp3) - (tmp4 * tmp5); + tmp14 = (tmp4 * tmp3) + (tmp2 * tmp5); + } + { + fftw_real tmp8; + fftw_real tmp10; + fftw_real tmp7; + fftw_real tmp9; + ASSERT_ALIGNED_DOUBLE; + tmp8 = c_re(inout[2 * iostride]); + tmp10 = c_im(inout[2 * iostride]); + tmp7 = c_re(W[1]); + tmp9 = c_im(W[1]); + tmp11 = (tmp7 * tmp8) - (tmp9 * tmp10); + tmp15 = (tmp9 * tmp8) + (tmp7 * tmp10); + } + tmp12 = tmp6 + tmp11; + tmp17 = tmp14 + tmp15; + { + fftw_real tmp13; + fftw_real tmp16; + fftw_real tmp19; + fftw_real tmp20; + ASSERT_ALIGNED_DOUBLE; + c_re(inout[0]) = tmp1 + tmp12; + tmp13 = tmp1 - (K500000000 * tmp12); + tmp16 = K866025403 * (tmp14 - tmp15); + c_re(inout[2 * iostride]) = tmp13 - tmp16; + c_re(inout[iostride]) = tmp13 + tmp16; + c_im(inout[0]) = tmp17 + tmp18; + tmp19 = K866025403 * (tmp11 - tmp6); + tmp20 = tmp18 - (K500000000 * tmp17); + c_im(inout[iostride]) = tmp19 + tmp20; + c_im(inout[2 * iostride]) = tmp20 - tmp19; + } + } +} + +static const int twiddle_order[] = { 1, 2 }; +fftw_codelet_desc fftw_twiddle_3_desc = { + "fftw_twiddle_3", + (void (*)()) fftw_twiddle_3, + 3, + FFTW_FORWARD, + FFTW_TWIDDLE, + 66, + 2, + twiddle_order, +}; |