volk_32fc_conjugate_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_32fc_conjugate_32fc_u_H
#define INCLUDED_volk_32fc_conjugate_32fc_u_H

#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
#include <float.h>

#ifdef LV_HAVE_AVX
#include <immintrin.h>
  /*!
    \brief Takes the conjugate of a complex vector.
    \param cVector The vector where the results will be stored
    \param aVector Vector to be conjugated
    \param num_points The number of complex values in aVector to be conjugated and stored into cVector
  */
static inline void volk_32fc_conjugate_32fc_u_avx(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points){
    unsigned int number = 0;
    const unsigned int quarterPoints = num_points / 4;

    __m256 x;
    lv_32fc_t* c = cVector;
    const lv_32fc_t* a = aVector;

    __m256 conjugator = _mm256_setr_ps(0, -0.f, 0, -0.f, 0, -0.f, 0, -0.f);

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

      x = _mm256_loadu_ps((float*)a); // Load the complex data as ar,ai,br,bi

      x = _mm256_xor_ps(x, conjugator); // conjugate register

      _mm256_storeu_ps((float*)c,x); // Store the results back into the C container

      a += 4;
      c += 4;
    }

    number = quarterPoints * 4;

    for(;number < num_points; number++) {
      *c++ = lv_conj(*a++);
    }
}
#endif /* LV_HAVE_AVX */

#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
  /*!
    \brief Takes the conjugate of a complex vector.
    \param cVector The vector where the results will be stored
    \param aVector Vector to be conjugated
    \param num_points The number of complex values in aVector to be conjugated and stored into cVector
  */
static inline void volk_32fc_conjugate_32fc_u_sse3(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points){
    unsigned int number = 0;
    const unsigned int halfPoints = num_points / 2;

    __m128 x;
    lv_32fc_t* c = cVector;
    const lv_32fc_t* a = aVector;

    __m128 conjugator = _mm_setr_ps(0, -0.f, 0, -0.f);

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

      x = _mm_loadu_ps((float*)a); // Load the complex data as ar,ai,br,bi

      x = _mm_xor_ps(x, conjugator); // conjugate register

      _mm_storeu_ps((float*)c,x); // Store the results back into the C container

      a += 2;
      c += 2;
    }

    if((num_points % 2) != 0) {
      *c = lv_conj(*a);
    }
}
#endif /* LV_HAVE_SSE3 */

#ifdef LV_HAVE_GENERIC
  /*!
    \brief Takes the conjugate of a complex vector.
    \param cVector The vector where the results will be stored
    \param aVector Vector to be conjugated
    \param num_points The number of complex values in aVector to be conjugated and stored into cVector
  */
static inline void volk_32fc_conjugate_32fc_generic(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points){
    lv_32fc_t* cPtr = cVector;
    const lv_32fc_t* aPtr = aVector;
    unsigned int number = 0;

    for(number = 0; number < num_points; number++){
      *cPtr++ = lv_conj(*aPtr++);
    }
}
#endif /* LV_HAVE_GENERIC */


#endif /* INCLUDED_volk_32fc_conjugate_32fc_u_H */
#ifndef INCLUDED_volk_32fc_conjugate_32fc_a_H
#define INCLUDED_volk_32fc_conjugate_32fc_a_H

#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
#include <float.h>

#ifdef LV_HAVE_AVX
#include <immintrin.h>
  /*!
    \brief Takes the conjugate of a complex vector.
    \param cVector The vector where the results will be stored
    \param aVector Vector to be conjugated
    \param num_points The number of complex values in aVector to be conjugated and stored into cVector
  */
static inline void volk_32fc_conjugate_32fc_a_avx(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points){
    unsigned int number = 0;
    const unsigned int quarterPoints = num_points / 4;

    __m256 x;
    lv_32fc_t* c = cVector;
    const lv_32fc_t* a = aVector;

    __m256 conjugator = _mm256_setr_ps(0, -0.f, 0, -0.f, 0, -0.f, 0, -0.f);

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

      x = _mm256_load_ps((float*)a); // Load the complex data as ar,ai,br,bi

      x = _mm256_xor_ps(x, conjugator); // conjugate register

      _mm256_store_ps((float*)c,x); // Store the results back into the C container

      a += 4;
      c += 4;
    }

    number = quarterPoints * 4;

    for(;number < num_points; number++) {
      *c++ = lv_conj(*a++);
    }
}
#endif /* LV_HAVE_AVX */

#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
  /*!
    \brief Takes the conjugate of a complex vector.
    \param cVector The vector where the results will be stored
    \param aVector Vector to be conjugated
    \param num_points The number of complex values in aVector to be conjugated and stored into cVector
  */
static inline void volk_32fc_conjugate_32fc_a_sse3(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points){
    unsigned int number = 0;
    const unsigned int halfPoints = num_points / 2;

    __m128 x;
    lv_32fc_t* c = cVector;
    const lv_32fc_t* a = aVector;

    __m128 conjugator = _mm_setr_ps(0, -0.f, 0, -0.f);

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

      x = _mm_load_ps((float*)a); // Load the complex data as ar,ai,br,bi

      x = _mm_xor_ps(x, conjugator); // conjugate register

      _mm_store_ps((float*)c,x); // Store the results back into the C container

      a += 2;
      c += 2;
    }

    if((num_points % 2) != 0) {
      *c = lv_conj(*a);
    }
}
#endif /* LV_HAVE_SSE3 */

#ifdef LV_HAVE_NEON
#include <arm_neon.h>
  /*!
    \brief Takes the conjugate of a complex vector.
    \param cVector The vector where the results will be stored
    \param aVector Vector to be conjugated
    \param num_points The number of complex values in aVector to be conjugated and stored into cVector
  */
static inline void volk_32fc_conjugate_32fc_a_neon(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points){
    unsigned int number;
    const unsigned int quarterPoints = num_points / 4;

    float32x4x2_t x;
    lv_32fc_t* c = cVector;
    const lv_32fc_t* a = aVector;

    for(number=0; number < quarterPoints; number++){
      __builtin_prefetch(a+4);
      x = vld2q_f32((float*)a); // Load the complex data as ar,br,cr,dr; ai,bi,ci,di

      // xor the imaginary lane
      x.val[1] = vnegq_f32( x.val[1]);

      vst2q_f32((float*)c,x); // Store the results back into the C container

      a += 4;
      c += 4;
    }

    for(number=quarterPoints*4; number < num_points; number++){
      *c++ = lv_conj(*a++);
    }
}
#endif /* LV_HAVE_NEON */

#ifdef LV_HAVE_GENERIC
  /*!
    \brief Takes the conjugate of a complex vector.
    \param cVector The vector where the results will be stored
    \param aVector Vector to be conjugated
    \param num_points The number of complex values in aVector to be conjugated and stored into cVector
  */
static inline void volk_32fc_conjugate_32fc_a_generic(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points){
    lv_32fc_t* cPtr = cVector;
    const lv_32fc_t* aPtr = aVector;
    unsigned int number = 0;

    for(number = 0; number < num_points; number++){
      *cPtr++ = lv_conj(*aPtr++);
    }
}
#endif /* LV_HAVE_GENERIC */


#endif /* INCLUDED_volk_32fc_conjugate_32fc_a_H */