volk_32fc_s32f_magnitude_16i.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_32fc_s32f_magnitude_16i_a_H
#define INCLUDED_volk_32fc_s32f_magnitude_16i_a_H

#include <volk/volk_common.h>
#include <inttypes.h>
#include <stdio.h>
#include <math.h>

#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
/*!
  \brief Calculates the magnitude of the complexVector, scales the resulting value and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param scalar The scale value multiplied to the magnitude of each complex vector
  \param magnitudeVector The vector containing the real output values
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
static inline void volk_32fc_s32f_magnitude_16i_a_sse3(int16_t* magnitudeVector, const lv_32fc_t* complexVector, const float scalar, unsigned int num_points){
  unsigned int number = 0;
  const unsigned int quarterPoints = num_points / 4;

  const float* complexVectorPtr = (const float*)complexVector;
  int16_t* magnitudeVectorPtr = magnitudeVector;

  __m128 vScalar = _mm_set_ps1(scalar);

  __m128 cplxValue1, cplxValue2, result;

  __VOLK_ATTR_ALIGNED(16) float floatBuffer[4];

  for(;number < quarterPoints; number++){
    cplxValue1 = _mm_load_ps(complexVectorPtr);
    complexVectorPtr += 4;

    cplxValue2 = _mm_load_ps(complexVectorPtr);
    complexVectorPtr += 4;

    cplxValue1 = _mm_mul_ps(cplxValue1, cplxValue1); // Square the values
    cplxValue2 = _mm_mul_ps(cplxValue2, cplxValue2); // Square the Values

    result = _mm_hadd_ps(cplxValue1, cplxValue2); // Add the I2 and Q2 values

    result = _mm_sqrt_ps(result);

    result = _mm_mul_ps(result, vScalar);

    _mm_store_ps(floatBuffer, result);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[0]);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[1]);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[2]);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[3]);
  }

  number = quarterPoints * 4;
  magnitudeVectorPtr = &magnitudeVector[number];
  for(; number < num_points; number++){
    float val1Real = *complexVectorPtr++;
    float val1Imag = *complexVectorPtr++;
    *magnitudeVectorPtr++ = (int16_t)(sqrtf((val1Real * val1Real) + (val1Imag * val1Imag)) * scalar);
  }
}
#endif /* LV_HAVE_SSE3 */

#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
/*!
  \brief Calculates the magnitude of the complexVector, scales the resulting value and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param scalar The scale value multiplied to the magnitude of each complex vector
  \param magnitudeVector The vector containing the real output values
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
static inline void volk_32fc_s32f_magnitude_16i_a_sse(int16_t* magnitudeVector, const lv_32fc_t* complexVector, const float scalar, unsigned int num_points){
  unsigned int number = 0;
  const unsigned int quarterPoints = num_points / 4;

  const float* complexVectorPtr = (const float*)complexVector;
  int16_t* magnitudeVectorPtr = magnitudeVector;

  __m128 vScalar = _mm_set_ps1(scalar);

  __m128 cplxValue1, cplxValue2, iValue, qValue, result;

  __VOLK_ATTR_ALIGNED(16) float floatBuffer[4];

  for(;number < quarterPoints; number++){
    cplxValue1 = _mm_load_ps(complexVectorPtr);
    complexVectorPtr += 4;

    cplxValue2 = _mm_load_ps(complexVectorPtr);
    complexVectorPtr += 4;

    // Arrange in i1i2i3i4 format
    iValue = _mm_shuffle_ps(cplxValue1, cplxValue2, _MM_SHUFFLE(2,0,2,0));
    // Arrange in q1q2q3q4 format
    qValue = _mm_shuffle_ps(cplxValue1, cplxValue2, _MM_SHUFFLE(3,1,3,1));

    iValue = _mm_mul_ps(iValue, iValue); // Square the I values
    qValue = _mm_mul_ps(qValue, qValue); // Square the Q Values

    result = _mm_add_ps(iValue, qValue); // Add the I2 and Q2 values

    result = _mm_sqrt_ps(result);

    result = _mm_mul_ps(result, vScalar);

    _mm_store_ps(floatBuffer, result);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[0]);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[1]);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[2]);
    *magnitudeVectorPtr++ = (int16_t)(floatBuffer[3]);
  }

  number = quarterPoints * 4;
  magnitudeVectorPtr = &magnitudeVector[number];
  for(; number < num_points; number++){
    float val1Real = *complexVectorPtr++;
    float val1Imag = *complexVectorPtr++;
    *magnitudeVectorPtr++ = (int16_t)(sqrtf((val1Real * val1Real) + (val1Imag * val1Imag)) * scalar);
  }
}
#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_GENERIC
/*!
  \brief Calculates the magnitude of the complexVector, scales the resulting value and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param scalar The scale value multiplied to the magnitude of each complex vector
  \param magnitudeVector The vector containing the real output values
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
static inline void volk_32fc_s32f_magnitude_16i_generic(int16_t* magnitudeVector, const lv_32fc_t* complexVector, const float scalar, unsigned int num_points){
  const float* complexVectorPtr = (float*)complexVector;
  int16_t* magnitudeVectorPtr = magnitudeVector;
  unsigned int number = 0;
  for(number = 0; number < num_points; number++){
    const float real = *complexVectorPtr++;
    const float imag = *complexVectorPtr++;
    *magnitudeVectorPtr++ = (int16_t)(sqrtf((real*real) + (imag*imag)) * scalar);
  }
}
#endif /* LV_HAVE_GENERIC */

#ifdef LV_HAVE_ORC
/*!
  \brief Calculates the magnitude of the complexVector, scales the resulting value and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param scalar The scale value multiplied to the magnitude of each complex vector
  \param magnitudeVector The vector containing the real output values
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
extern void volk_32fc_s32f_magnitude_16i_a_orc_impl(int16_t* magnitudeVector, const lv_32fc_t* complexVector, const float scalar, unsigned int num_points);
static inline void volk_32fc_s32f_magnitude_16i_u_orc(int16_t* magnitudeVector, const lv_32fc_t* complexVector, const float scalar, unsigned int num_points){
    volk_32fc_s32f_magnitude_16i_a_orc_impl(magnitudeVector, complexVector, scalar, num_points);
}
#endif /* LV_HAVE_ORC */


#endif /* INCLUDED_volk_32fc_s32f_magnitude_16i_a_H */