diff options
Diffstat (limited to 'src/fftw/ftw_4.c')
| -rw-r--r-- | src/fftw/ftw_4.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/fftw/ftw_4.c b/src/fftw/ftw_4.c new file mode 100644 index 0000000..c04b449 --- /dev/null +++ b/src/fftw/ftw_4.c @@ -0,0 +1,141 @@ +/* + * 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 4 */ + +/* + * This function contains 22 FP additions, 12 FP multiplications, + * (or, 16 additions, 6 multiplications, 6 fused multiply/add), + * 14 stack variables, and 16 memory accesses + */ + +/* + * Generator Id's : + * $Id: ftw_4.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: ftw_4.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: ftw_4.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + */ + +void fftw_twiddle_4(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 + 3) { + fftw_real tmp1; + fftw_real tmp25; + fftw_real tmp6; + fftw_real tmp24; + fftw_real tmp12; + fftw_real tmp20; + fftw_real tmp17; + fftw_real tmp21; + ASSERT_ALIGNED_DOUBLE; + tmp1 = c_re(inout[0]); + tmp25 = c_im(inout[0]); + { + fftw_real tmp3; + fftw_real tmp5; + fftw_real tmp2; + fftw_real tmp4; + ASSERT_ALIGNED_DOUBLE; + tmp3 = c_re(inout[2 * iostride]); + tmp5 = c_im(inout[2 * iostride]); + tmp2 = c_re(W[1]); + tmp4 = c_im(W[1]); + tmp6 = (tmp2 * tmp3) - (tmp4 * tmp5); + tmp24 = (tmp4 * tmp3) + (tmp2 * tmp5); + } + { + fftw_real tmp9; + fftw_real tmp11; + fftw_real tmp8; + fftw_real tmp10; + ASSERT_ALIGNED_DOUBLE; + tmp9 = c_re(inout[iostride]); + tmp11 = c_im(inout[iostride]); + tmp8 = c_re(W[0]); + tmp10 = c_im(W[0]); + tmp12 = (tmp8 * tmp9) - (tmp10 * tmp11); + tmp20 = (tmp10 * tmp9) + (tmp8 * tmp11); + } + { + fftw_real tmp14; + fftw_real tmp16; + fftw_real tmp13; + fftw_real tmp15; + ASSERT_ALIGNED_DOUBLE; + tmp14 = c_re(inout[3 * iostride]); + tmp16 = c_im(inout[3 * iostride]); + tmp13 = c_re(W[2]); + tmp15 = c_im(W[2]); + tmp17 = (tmp13 * tmp14) - (tmp15 * tmp16); + tmp21 = (tmp15 * tmp14) + (tmp13 * tmp16); + } + { + fftw_real tmp7; + fftw_real tmp18; + fftw_real tmp27; + fftw_real tmp28; + ASSERT_ALIGNED_DOUBLE; + tmp7 = tmp1 + tmp6; + tmp18 = tmp12 + tmp17; + c_re(inout[2 * iostride]) = tmp7 - tmp18; + c_re(inout[0]) = tmp7 + tmp18; + tmp27 = tmp25 - tmp24; + tmp28 = tmp12 - tmp17; + c_im(inout[iostride]) = tmp27 - tmp28; + c_im(inout[3 * iostride]) = tmp28 + tmp27; + } + { + fftw_real tmp23; + fftw_real tmp26; + fftw_real tmp19; + fftw_real tmp22; + ASSERT_ALIGNED_DOUBLE; + tmp23 = tmp20 + tmp21; + tmp26 = tmp24 + tmp25; + c_im(inout[0]) = tmp23 + tmp26; + c_im(inout[2 * iostride]) = tmp26 - tmp23; + tmp19 = tmp1 - tmp6; + tmp22 = tmp20 - tmp21; + c_re(inout[3 * iostride]) = tmp19 - tmp22; + c_re(inout[iostride]) = tmp19 + tmp22; + } + } +} + +static const int twiddle_order[] = { 1, 2, 3 }; +fftw_codelet_desc fftw_twiddle_4_desc = { + "fftw_twiddle_4", + (void (*)()) fftw_twiddle_4, + 4, + FFTW_FORWARD, + FFTW_TWIDDLE, + 88, + 3, + twiddle_order, +}; |