root / gnuradio-core / src / lib / filter / short_dotprod_generic.c @ 5d69a524
History | View | Annotate | Download (1.3 kB)
| 1 | /* -*- c -*- */
|
|---|---|
| 2 | /*
|
| 3 | * Copyright 2002 Free Software Foundation, Inc. |
| 4 | * |
| 5 | * This file is part of GNU Radio |
| 6 | * |
| 7 | * GNU Radio is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * GNU Radio is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with GNU Radio; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | * Boston, MA 02111-1307, USA. |
| 21 | */ |
| 22 | |
| 23 | #include "short_dotprod_generic.h" |
| 24 | |
| 25 | |
| 26 | int
|
| 27 | short_dotprod_generic (const short *input, |
| 28 | const short *taps, unsigned n_4_short_blocks) |
| 29 | {
|
| 30 | int sum0 = 0; |
| 31 | int sum1 = 0; |
| 32 | int sum2 = 0; |
| 33 | int sum3 = 0; |
| 34 | |
| 35 | do {
|
| 36 | |
| 37 | sum0 += input[0] * taps[0]; |
| 38 | sum1 += input[1] * taps[1]; |
| 39 | sum2 += input[2] * taps[2]; |
| 40 | sum3 += input[3] * taps[3]; |
| 41 | |
| 42 | input += 4;
|
| 43 | taps += 4;
|
| 44 | |
| 45 | } while (--n_4_short_blocks != 0); |
| 46 | |
| 47 | |
| 48 | return (sum0 + sum1 + sum2 + sum3);
|
| 49 | } |