diff options
Diffstat (limited to 'src/fftw/fn_3.c')
| -rw-r--r-- | src/fftw/fn_3.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/fftw/fn_3.c b/src/fftw/fn_3.c new file mode 100644 index 0000000..4f143d7 --- /dev/null +++ b/src/fftw/fn_3.c @@ -0,0 +1,93 @@ +/* + * 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 02:05:37 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 -notwiddle 3 */ + +/* + * This function contains 12 FP additions, 4 FP multiplications, + * (or, 10 additions, 2 multiplications, 2 fused multiply/add), + * 12 stack variables, and 12 memory accesses + */ +static const fftw_real K500000000 = +FFTW_KONST(+0.500000000000000000000000000000000000000000000); +static const fftw_real K866025403 = +FFTW_KONST(+0.866025403784438646763723170752936183471402627); + +/* + * Generator Id's : + * $Id: fn_3.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: fn_3.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + * $Id: fn_3.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ + */ + +void fftw_no_twiddle_3(const fftw_complex *input, fftw_complex *output, + int istride, int ostride) +{ + fftw_real tmp1; + fftw_real tmp10; + fftw_real tmp4; + fftw_real tmp9; + fftw_real tmp8; + fftw_real tmp11; + fftw_real tmp5; + fftw_real tmp12; + ASSERT_ALIGNED_DOUBLE; + tmp1 = c_re(input[0]); + tmp10 = c_im(input[0]); + { + fftw_real tmp2; + fftw_real tmp3; + fftw_real tmp6; + fftw_real tmp7; + ASSERT_ALIGNED_DOUBLE; + tmp2 = c_re(input[istride]); + tmp3 = c_re(input[2 * istride]); + tmp4 = tmp2 + tmp3; + tmp9 = K866025403 * (tmp3 - tmp2); + tmp6 = c_im(input[istride]); + tmp7 = c_im(input[2 * istride]); + tmp8 = K866025403 * (tmp6 - tmp7); + tmp11 = tmp6 + tmp7; + } + c_re(output[0]) = tmp1 + tmp4; + tmp5 = tmp1 - (K500000000 * tmp4); + c_re(output[2 * ostride]) = tmp5 - tmp8; + c_re(output[ostride]) = tmp5 + tmp8; + c_im(output[0]) = tmp10 + tmp11; + tmp12 = tmp10 - (K500000000 * tmp11); + c_im(output[ostride]) = tmp9 + tmp12; + c_im(output[2 * ostride]) = tmp12 - tmp9; +} + +fftw_codelet_desc fftw_no_twiddle_3_desc = { + "fftw_no_twiddle_3", + (void (*)()) fftw_no_twiddle_3, + 3, + FFTW_FORWARD, + FFTW_NOTW, + 67, + 0, + (const int *) 0, +}; |