volk_32f_s32f_normalize.h

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/* -*- c++ -*- */
/*
 * Copyright 2014 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 3, 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., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef INCLUDED_volk_32f_s32f_normalize_a_H
#define INCLUDED_volk_32f_s32f_normalize_a_H

#include <inttypes.h>
#include <stdio.h>

#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
/*!
  \brief Normalizes all points in the buffer by the scalar value ( divides each data point by the scalar value )
  \param vecBuffer The buffer of values to be vectorized
  \param num_points The number of values in vecBuffer
  \param scalar The scale value to be applied to each buffer value
*/
static inline void volk_32f_s32f_normalize_a_sse(float* vecBuffer, const float scalar, unsigned int num_points){
  unsigned int number = 0;
  float* inputPtr = vecBuffer;

  const float invScalar = 1.0 / scalar;
  __m128 vecScalar = _mm_set_ps1(invScalar);

  __m128 input1;

  const uint64_t quarterPoints = num_points / 4;
  for(;number < quarterPoints; number++){

    input1 = _mm_load_ps(inputPtr);

    input1 = _mm_mul_ps(input1, vecScalar);

    _mm_store_ps(inputPtr, input1);

    inputPtr += 4;
  }

  number = quarterPoints*4;
  for(; number < num_points; number++){
    *inputPtr *= invScalar;
    inputPtr++;
  }
}
#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_GENERIC
/*!
  \brief Normalizes the two input vectors and store their results in the third vector
  \param cVector The vector where the results will be stored
  \param aVector One of the vectors to be normalizeed
  \param bVector One of the vectors to be normalizeed
  \param num_points The number of values in aVector and bVector to be normalizeed together and stored into cVector
*/
static inline void volk_32f_s32f_normalize_generic(float* vecBuffer, const float scalar, unsigned int num_points){
  unsigned int number = 0;
  float* inputPtr = vecBuffer;
  const float invScalar = 1.0 / scalar;
  for(number = 0; number < num_points; number++){
    *inputPtr *= invScalar;
    inputPtr++;
  }
}
#endif /* LV_HAVE_GENERIC */

#ifdef LV_HAVE_ORC
/*!
  \brief Normalizes the two input vectors and store their results in the third vector
  \param cVector The vector where the results will be stored
  \param aVector One of the vectors to be normalizeed
  \param bVector One of the vectors to be normalizeed
  \param num_points The number of values in aVector and bVector to be normalizeed together and stored into cVector
*/
extern void volk_32f_s32f_normalize_a_orc_impl(float* dst, float* src, const float scalar, unsigned int num_points);
static inline void volk_32f_s32f_normalize_u_orc(float* vecBuffer, const float scalar, unsigned int num_points){
    float invscalar = 1.0 / scalar;
    volk_32f_s32f_normalize_a_orc_impl(vecBuffer, vecBuffer, invscalar, num_points);
}
#endif /* LV_HAVE_GENERIC */




#endif /* INCLUDED_volk_32f_s32f_normalize_a_H */