diff options
Diffstat (limited to 'src/fftw/ftwi_2.c')
| -rw-r--r-- | src/fftw/ftwi_2.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/fftw/ftwi_2.c b/src/fftw/ftwi_2.c new file mode 100644 index 0000000..cd0717c --- /dev/null +++ b/src/fftw/ftwi_2.c @@ -0,0 +1,85 @@ +/* + * 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 02:08:24 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 2 */ + +/* + * This function contains 6 FP additions, 4 FP multiplications, + * (or, 4 additions, 2 multiplications, 2 fused multiply/add), + * 10 stack variables, and 8 memory accesses + */ + +/* + * Generator Id's : + * $Id: ftwi_2.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: ftwi_2.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: ftwi_2.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + */ + +void fftwi_twiddle_2(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 + 1) { + fftw_real tmp1; + fftw_real tmp8; + fftw_real tmp6; + fftw_real tmp7; + ASSERT_ALIGNED_DOUBLE; + tmp1 = c_re(inout[0]); + tmp8 = 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); + tmp7 = (tmp2 * tmp5) - (tmp4 * tmp3); + } + c_re(inout[iostride]) = tmp1 - tmp6; + c_re(inout[0]) = tmp1 + tmp6; + c_im(inout[0]) = tmp7 + tmp8; + c_im(inout[iostride]) = tmp8 - tmp7; + } +} + +static const int twiddle_order[] = { 1 }; +fftw_codelet_desc fftwi_twiddle_2_desc = { + "fftwi_twiddle_2", + (void (*)()) fftwi_twiddle_2, + 2, + FFTW_BACKWARD, + FFTW_TWIDDLE, + 55, + 1, + twiddle_order, +}; |