gr_fir_fsf_simd.h

gnuradio软件无线电源程序.现在的手机多基于软件无线电

/* -*- c++ -*- */
/*
 * Copyright 2002 Free Software Foundation, Inc.
 * 
 * This file is part of GNU Radio
 * 
 * GNU Radio 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, or (at your option)
 * any later version.
 * 
 * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
#ifndef _GR_FIR_FSF_SIMD_H_
#define _GR_FIR_FSF_SIMD_H_

#include <gr_fir_fsf_generic.h>

/*!
 * \brief common base class for SIMD versions of gr_fir_fsf
 *
 * This base class handles alignment issues common to SSE and 3DNOW
 * subclasses.
 */

class gr_fir_fsf_simd : public gr_fir_fsf_generic
{
protected:
  typedef float (*float_dotprod_t)(const float *input,
				   const float *taps,
				   unsigned n_4_float_blocks);

  /*!
   * \p aligned_taps holds 4 copies of the coefficients preshifted
   * by 0, 1, 2, or 3 floats to meet all possible input data alignments.
   * This allows us to always fetch data and taps that are 128-bit aligned.
   */
  float 		*d_aligned_taps[4];

  float_dotprod_t	d_float_dotprod; 	// fast dot product primitive

public:

  // CREATORS
  gr_fir_fsf_simd ();
  gr_fir_fsf_simd (const std::vector<float> &taps);
  ~gr_fir_fsf_simd ();

  // MANIPULATORS
  virtual void set_taps (const std::vector<float> &taps);
  virtual short filter (const float input[]);
};

#endif