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root / gnuradio-core / src / lib / filter / short_dotprod_generic.c @ 5d69a524

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/* -*- c -*- */
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/*
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 * Copyright 2002 Free Software Foundation, Inc.
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 * 
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 * This file is part of GNU Radio
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 * 
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 * GNU Radio is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2, or (at your option)
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 * any later version.
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 * 
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 * GNU Radio is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 * 
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 * You should have received a copy of the GNU General Public License
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 * along with GNU Radio; see the file COPYING.  If not, write to
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 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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 * Boston, MA 02111-1307, USA.
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 */
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#include "short_dotprod_generic.h"
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int
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short_dotprod_generic (const short *input,
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                       const short *taps, unsigned n_4_short_blocks)
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{
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  int sum0 = 0;
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  int sum1 = 0;
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  int sum2 = 0;
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  int sum3 = 0;
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  do {
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    sum0 += input[0] * taps[0];
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    sum1 += input[1] * taps[1];
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    sum2 += input[2] * taps[2];
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    sum3 += input[3] * taps[3];
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    input += 4;
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    taps += 4;
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  } while (--n_4_short_blocks != 0);
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  return (sum0 + sum1 + sum2 + sum3);
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}