ref: 4f9a9087f16b92662389be3dc0589629359ac8a4
dir: /libfaad/fftw/fni_3.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 20:44:03 EST 1999 */ #include <fftw-int.h> #include <fftw.h> /* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -notwiddleinv 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: fni_3.c,v 1.1 2002/04/07 21:26:04 menno Exp $ * $Id: fni_3.c,v 1.1 2002/04/07 21:26:04 menno Exp $ * $Id: fni_3.c,v 1.1 2002/04/07 21:26:04 menno Exp $ */ void fftwi_no_twiddle_3(const fftw_complex *input, fftw_complex *output, int istride, int ostride) { fftw_real tmp1; fftw_real tmp6; fftw_real tmp4; fftw_real tmp5; fftw_real tmp9; fftw_real tmp12; fftw_real tmp11; fftw_real tmp10; ASSERT_ALIGNED_DOUBLE; tmp1 = c_re(input[0]); tmp6 = c_im(input[0]); { fftw_real tmp2; fftw_real tmp3; fftw_real tmp7; fftw_real tmp8; ASSERT_ALIGNED_DOUBLE; tmp2 = c_re(input[istride]); tmp3 = c_re(input[2 * istride]); tmp4 = tmp2 + tmp3; tmp5 = K866025403 * (tmp2 - tmp3); tmp7 = c_im(input[istride]); tmp8 = c_im(input[2 * istride]); tmp9 = tmp7 + tmp8; tmp12 = K866025403 * (tmp8 - tmp7); } c_re(output[0]) = tmp1 + tmp4; tmp11 = tmp1 - (K500000000 * tmp4); c_re(output[2 * ostride]) = tmp11 - tmp12; c_re(output[ostride]) = tmp11 + tmp12; c_im(output[0]) = tmp6 + tmp9; tmp10 = tmp6 - (K500000000 * tmp9); c_im(output[ostride]) = tmp5 + tmp10; c_im(output[2 * ostride]) = tmp10 - tmp5; } fftw_codelet_desc fftwi_no_twiddle_3_desc = { "fftwi_no_twiddle_3", (void (*)()) fftwi_no_twiddle_3, 3, FFTW_BACKWARD, FFTW_NOTW, 78, 0, (const int *) 0, };