diff options
Diffstat (limited to 'src/fftw3/dft/codelets/standard/t2_4.c')
| -rw-r--r-- | src/fftw3/dft/codelets/standard/t2_4.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/fftw3/dft/codelets/standard/t2_4.c b/src/fftw3/dft/codelets/standard/t2_4.c new file mode 100644 index 0000000..ced1a63 --- /dev/null +++ b/src/fftw3/dft/codelets/standard/t2_4.c @@ -0,0 +1,108 @@ +/* + * Copyright (c) 2003 Matteo Frigo + * Copyright (c) 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 Sat Jul 5 21:30:08 EDT 2003 */ + +#include "codelet-dft.h" + +/* Generated by: /homee/stevenj/cvs/fftw3.0.1/genfft/gen_twiddle -compact -variables 4 -twiddle-log3 -n 4 -name t2_4 -include t.h */ + +/* + * This function contains 24 FP additions, 16 FP multiplications, + * (or, 16 additions, 8 multiplications, 8 fused multiply/add), + * 21 stack variables, and 16 memory accesses + */ +/* + * Generator Id's : + * $Id: t2_4.c,v 1.1 2008/10/17 06:11:09 scuri Exp $ + * $Id: t2_4.c,v 1.1 2008/10/17 06:11:09 scuri Exp $ + * $Id: t2_4.c,v 1.1 2008/10/17 06:11:09 scuri Exp $ + */ + +#include "t.h" + +static const R *t2_4(R *ri, R *ii, const R *W, stride ios, int m, int dist) +{ + int i; + for (i = m; i > 0; i = i - 1, ri = ri + dist, ii = ii + dist, W = W + 4) { + E T1, Tp, Ta, Te, To, Tl, Tk, Th; + T1 = ri[0]; + Tp = ii[0]; + { + E T7, T9, Tc, Td, Tg, Tf, T2, T4, T3, T5, T6, T8; + T7 = ri[WS(ios, 2)]; + T9 = ii[WS(ios, 2)]; + Tc = ri[WS(ios, 1)]; + Td = ii[WS(ios, 1)]; + Tg = ii[WS(ios, 3)]; + Tf = ri[WS(ios, 3)]; + T2 = W[2]; + T4 = W[3]; + T3 = W[0]; + T5 = W[1]; + T6 = FMA(T2, T3, T4 * T5); + T8 = FNMS(T4, T3, T2 * T5); + Ta = FNMS(T8, T9, T6 * T7); + Te = FMA(T3, Tc, T5 * Td); + To = FMA(T8, T7, T6 * T9); + Tl = FNMS(T4, Tf, T2 * Tg); + Tk = FNMS(T5, Tc, T3 * Td); + Th = FMA(T2, Tf, T4 * Tg); + } + { + E Tb, Ti, Tn, Tq; + Tb = T1 + Ta; + Ti = Te + Th; + ri[WS(ios, 2)] = Tb - Ti; + ri[0] = Tb + Ti; + Tn = Tk + Tl; + Tq = To + Tp; + ii[0] = Tn + Tq; + ii[WS(ios, 2)] = Tq - Tn; + } + { + E Tj, Tm, Tr, Ts; + Tj = T1 - Ta; + Tm = Tk - Tl; + ri[WS(ios, 3)] = Tj - Tm; + ri[WS(ios, 1)] = Tj + Tm; + Tr = Tp - To; + Ts = Te - Th; + ii[WS(ios, 1)] = Tr - Ts; + ii[WS(ios, 3)] = Ts + Tr; + } + } + return W; +} + +static const tw_instr twinstr[] = { + {TW_COS, 0, 1}, + {TW_SIN, 0, 1}, + {TW_COS, 0, 3}, + {TW_SIN, 0, 3}, + {TW_NEXT, 1, 0} +}; + +static const ct_desc desc = { 4, "t2_4", twinstr, {16, 8, 8, 0}, &GENUS, 0, 0, 0 }; + +void X(codelet_t2_4) (planner *p) { + X(kdft_dit_register) (p, t2_4, &desc); +} |