volk_16ic_s32f_magnitude_32f_a.h

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#ifndef INCLUDED_volk_16ic_s32f_magnitude_32f_a_H
#define INCLUDED_volk_16ic_s32f_magnitude_32f_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 and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param magnitudeVector The vector containing the real output values
  \param scalar The data value to be divided against each input data value of the input complex vector
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
static inline void volk_16ic_s32f_magnitude_32f_a_sse3(float* magnitudeVector, const lv_16sc_t* complexVector, const float scalar, unsigned int num_points){
  unsigned int number = 0;
  const unsigned int quarterPoints = num_points / 4;

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

  __m128 invScalar = _mm_set_ps1(1.0/scalar);

  __m128 cplxValue1, cplxValue2, result;

  __VOLK_ATTR_ALIGNED(16) float inputFloatBuffer[8];

  for(;number < quarterPoints; number++){

    inputFloatBuffer[0] = (float)(complexVectorPtr[0]);
    inputFloatBuffer[1] = (float)(complexVectorPtr[1]);
    inputFloatBuffer[2] = (float)(complexVectorPtr[2]);
    inputFloatBuffer[3] = (float)(complexVectorPtr[3]);

    inputFloatBuffer[4] = (float)(complexVectorPtr[4]);
    inputFloatBuffer[5] = (float)(complexVectorPtr[5]);
    inputFloatBuffer[6] = (float)(complexVectorPtr[6]);
    inputFloatBuffer[7] = (float)(complexVectorPtr[7]);

    cplxValue1 = _mm_load_ps(&inputFloatBuffer[0]);
    cplxValue2 = _mm_load_ps(&inputFloatBuffer[4]);

    complexVectorPtr += 8;

    cplxValue1 = _mm_mul_ps(cplxValue1, invScalar);
    cplxValue2 = _mm_mul_ps(cplxValue2, invScalar);

    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); // Square root the values

    _mm_store_ps(magnitudeVectorPtr, result);

    magnitudeVectorPtr += 4;
  }

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

#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
/*!
  \brief Calculates the magnitude of the complexVector and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param magnitudeVector The vector containing the real output values
  \param scalar The data value to be divided against each input data value of the input complex vector
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
static inline void volk_16ic_s32f_magnitude_32f_a_sse(float* magnitudeVector, const lv_16sc_t* complexVector, const float scalar, unsigned int num_points){
  unsigned int number = 0;
  const unsigned int quarterPoints = num_points / 4;

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

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

  __m128 cplxValue1, cplxValue2, result, re, im;

  __VOLK_ATTR_ALIGNED(16) float inputFloatBuffer[8];

  for(;number < quarterPoints; number++){
    inputFloatBuffer[0] = (float)(complexVectorPtr[0]);
    inputFloatBuffer[1] = (float)(complexVectorPtr[1]);
    inputFloatBuffer[2] = (float)(complexVectorPtr[2]);
    inputFloatBuffer[3] = (float)(complexVectorPtr[3]);

    inputFloatBuffer[4] = (float)(complexVectorPtr[4]);
    inputFloatBuffer[5] = (float)(complexVectorPtr[5]);
    inputFloatBuffer[6] = (float)(complexVectorPtr[6]);
    inputFloatBuffer[7] = (float)(complexVectorPtr[7]);

    cplxValue1 = _mm_load_ps(&inputFloatBuffer[0]);
    cplxValue2 = _mm_load_ps(&inputFloatBuffer[4]);

    re = _mm_shuffle_ps(cplxValue1, cplxValue2, 0x88);
    im = _mm_shuffle_ps(cplxValue1, cplxValue2, 0xdd);

    complexVectorPtr += 8;

    cplxValue1 = _mm_mul_ps(re, invScalar);
    cplxValue2 = _mm_mul_ps(im, invScalar);

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

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

    result = _mm_sqrt_ps(result); // Square root the values

    _mm_store_ps(magnitudeVectorPtr, result);

    magnitudeVectorPtr += 4;
  }

  number = quarterPoints * 4;
  magnitudeVectorPtr = &magnitudeVector[number];
  complexVectorPtr = (const int16_t*)&complexVector[number];
  for(; number < num_points; number++){
    float val1Real = (float)(*complexVectorPtr++) * iScalar;
    float val1Imag = (float)(*complexVectorPtr++) * iScalar;
    *magnitudeVectorPtr++ = sqrtf((val1Real * val1Real) + (val1Imag * val1Imag));
  }
}


#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_GENERIC
/*!
  \brief Calculates the magnitude of the complexVector and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param magnitudeVector The vector containing the real output values
  \param scalar The data value to be divided against each input data value of the input complex vector
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
static inline void volk_16ic_s32f_magnitude_32f_a_generic(float* magnitudeVector, const lv_16sc_t* complexVector, const float scalar, unsigned int num_points){
  const int16_t* complexVectorPtr = (const int16_t*)complexVector;
  float* magnitudeVectorPtr = magnitudeVector;
  unsigned int number = 0;
  const float invScalar = 1.0 / scalar;
  for(number = 0; number < num_points; number++){
    float real = ( (float) (*complexVectorPtr++)) * invScalar;
    float imag = ( (float) (*complexVectorPtr++)) * invScalar;
    *magnitudeVectorPtr++ = sqrtf((real*real) + (imag*imag));
  }
}
#endif /* LV_HAVE_GENERIC */

#ifdef LV_HAVE_ORC_DISABLED
/*!
  \brief Calculates the magnitude of the complexVector and stores the results in the magnitudeVector
  \param complexVector The vector containing the complex input values
  \param magnitudeVector The vector containing the real output values
  \param scalar The data value to be divided against each input data value of the input complex vector
  \param num_points The number of complex values in complexVector to be calculated and stored into cVector
*/
extern void volk_16ic_s32f_magnitude_32f_a_orc_impl(float* magnitudeVector, const lv_16sc_t* complexVector, const float scalar, unsigned int num_points);
static inline void volk_16ic_s32f_magnitude_32f_a_orc(float* magnitudeVector, const lv_16sc_t* complexVector, const float scalar, unsigned int num_points){
    volk_16ic_s32f_magnitude_32f_a_orc_impl(magnitudeVector, complexVector, scalar, num_points);
}
#endif /* LV_HAVE_ORC */


#endif /* INCLUDED_volk_16ic_s32f_magnitude_32f_a_H */