volk_32f_x2_interleave_32fc.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_x2_interleave_32fc_a_H
#define INCLUDED_volk_32f_x2_interleave_32fc_a_H

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

#ifdef LV_HAVE_SSE
#include <xmmintrin.h>
/*!
  \brief Interleaves the I & Q vector data into the complex vector
  \param iBuffer The I buffer data to be interleaved
  \param qBuffer The Q buffer data to be interleaved
  \param complexVector The complex output vector
  \param num_points The number of complex data values to be interleaved
*/
static inline void volk_32f_x2_interleave_32fc_a_sse(lv_32fc_t* complexVector, const float* iBuffer, const float* qBuffer, unsigned int num_points){
  unsigned int number = 0;
  float* complexVectorPtr = (float*)complexVector;
  const float* iBufferPtr = iBuffer;
  const float* qBufferPtr = qBuffer;

  const uint64_t quarterPoints = num_points / 4;

  __m128 iValue, qValue, cplxValue;
  for(;number < quarterPoints; number++){
    iValue = _mm_load_ps(iBufferPtr);
    qValue = _mm_load_ps(qBufferPtr);

    // Interleaves the lower two values in the i and q variables into one buffer
    cplxValue = _mm_unpacklo_ps(iValue, qValue);
    _mm_store_ps(complexVectorPtr, cplxValue);
    complexVectorPtr += 4;

    // Interleaves the upper two values in the i and q variables into one buffer
    cplxValue = _mm_unpackhi_ps(iValue, qValue);
    _mm_store_ps(complexVectorPtr, cplxValue);
    complexVectorPtr += 4;

    iBufferPtr += 4;
    qBufferPtr += 4;
  }

  number = quarterPoints * 4;
  for(; number < num_points; number++){
    *complexVectorPtr++ = *iBufferPtr++;
    *complexVectorPtr++ = *qBufferPtr++;
  }
}
#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_NEON
#include <arm_neon.h>
/*!
  \brief Interleaves the I & Q vector data into the complex vector.
  \param iBuffer The I buffer data to be interleaved
  \param qBuffer The Q buffer data to be interleaved
  \param complexVector The complex output vector
  \param num_points The number of complex data values to be interleaved
*/
static inline void volk_32f_x2_interleave_32fc_neon(lv_32fc_t* complexVector, const float* iBuffer, const float* qBuffer, unsigned int num_points){
    unsigned int quarter_points = num_points / 4;
    unsigned int number;
    float* complexVectorPtr = (float*) complexVector;

    float32x4x2_t complex_vec;
    for(number=0; number < quarter_points; ++number) {
        complex_vec.val[0] = vld1q_f32(iBuffer);
        complex_vec.val[1] = vld1q_f32(qBuffer);
        vst2q_f32(complexVectorPtr, complex_vec);
        iBuffer += 4;
        qBuffer += 4;
        complexVectorPtr += 8;
    }

    for(number=quarter_points * 4; number < num_points; ++number) {
        *complexVectorPtr++ = *iBuffer++;
        *complexVectorPtr++ = *qBuffer++;
    }

}
#endif /* LV_HAVE_NEON */


#ifdef LV_HAVE_GENERIC
/*!
  \brief Interleaves the I & Q vector data into the complex vector.
  \param iBuffer The I buffer data to be interleaved
  \param qBuffer The Q buffer data to be interleaved
  \param complexVector The complex output vector
  \param num_points The number of complex data values to be interleaved
*/
static inline void volk_32f_x2_interleave_32fc_generic(lv_32fc_t* complexVector, const float* iBuffer, const float* qBuffer, unsigned int num_points){
  float* complexVectorPtr = (float*)complexVector;
  const float* iBufferPtr = iBuffer;
  const float* qBufferPtr = qBuffer;
  unsigned int number;

  for(number = 0; number < num_points; number++){
    *complexVectorPtr++ = *iBufferPtr++;
    *complexVectorPtr++ = *qBufferPtr++;
  }
}
#endif /* LV_HAVE_GENERIC */




#endif /* INCLUDED_volk_32f_x2_interleave_32fc_a_H */