volk_32f_binary_slicer_32i.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_binary_slicer_32i_H
#define INCLUDED_volk_32f_binary_slicer_32i_H


#ifdef LV_HAVE_GENERIC
/*!
  \brief Returns integer 1 if float input is greater than or equal to 0, 1 otherwise
  \param cVector The int output (either 0 or 1)
  \param aVector The float input
  \param num_points The number of values in aVector and stored into cVector
*/
static inline void volk_32f_binary_slicer_32i_generic(int* cVector, const float* aVector, unsigned int num_points){
    int* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;

    for(number = 0; number < num_points; number++){
        if( *aPtr++ >= 0) {
            *cPtr++ = 1;
        }
        else {
            *cPtr++ = 0;
        }
    }
}
#endif /* LV_HAVE_GENERIC */


#ifdef LV_HAVE_GENERIC
/*!
  \brief Returns integer 1 if float input is greater than or equal to 0, 1 otherwise
  \param cVector The int output (either 0 or 1)
  \param aVector The float input
  \param num_points The number of values in aVector and stored into cVector
*/
static inline void volk_32f_binary_slicer_32i_generic_branchless(int* cVector, const float* aVector, unsigned int num_points){
    int* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;

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


#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
/*!
  \brief Returns integer 1 if float input is greater than or equal to 0, 1 otherwise
  \param cVector The int output (either 0 or 1)
  \param aVector The float input
  \param num_points The number of values in aVector and stored into cVector
*/
static inline void volk_32f_binary_slicer_32i_a_sse2(int* cVector, const float* aVector, unsigned int num_points){
    int* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;

    unsigned int quarter_points = num_points / 4;
    __m128 a_val, res_f;
    __m128i res_i, binary_i;
    __m128 zero_val;
    zero_val = _mm_set1_ps (0.0f);

    for(number = 0; number < quarter_points; number++){
        a_val = _mm_load_ps(aPtr);

        res_f = _mm_cmpge_ps (a_val, zero_val);
        res_i = _mm_cvtps_epi32 (res_f);
        binary_i = _mm_srli_epi32 (res_i, 31);


        _mm_store_si128((__m128i*)cPtr, binary_i);


        cPtr += 4;
        aPtr += 4;
    }

    for(number = quarter_points * 4; number < num_points; number++){
        if( *aPtr++ >= 0) {
            *cPtr++ = 1;
        }
        else {
            *cPtr++ = 0;
        }
    }
}
#endif /* LV_HAVE_SSE2 */


#ifdef LV_HAVE_AVX
#include <immintrin.h>
/*!
  \brief Returns integer 1 if float input is greater than or equal to 0, 1 otherwise
  \param cVector The int output (either 0 or 1)
  \param aVector The float input
  \param num_points The number of values in aVector and stored into cVector
*/
static inline void volk_32f_binary_slicer_32i_a_avx(int* cVector, const float* aVector, unsigned int num_points){
    int* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;

    unsigned int quarter_points = num_points / 8;
    __m256 a_val, res_f, binary_f;
    __m256i binary_i;
    __m256 zero_val, one_val;
    zero_val = _mm256_set1_ps (0.0f);
    one_val = _mm256_set1_ps (1.0f);

    for(number = 0; number < quarter_points; number++){
        a_val = _mm256_load_ps(aPtr);

        res_f = _mm256_cmp_ps (a_val, zero_val, 13);
        binary_f = _mm256_and_ps (res_f, one_val);
        binary_i = _mm256_cvtps_epi32(binary_f);



        _mm256_store_si256((__m256i *)cPtr, binary_i);


        cPtr += 8;
        aPtr += 8;
    }

    for(number = quarter_points * 8; number < num_points; number++){
        if( *aPtr++ >= 0) {
            *cPtr++ = 1;
        }
        else {
            *cPtr++ = 0;
        }
    }
}
#endif /* LV_HAVE_AVX */


#ifdef LV_HAVE_SSE2
#include <emmintrin.h>
/*!
  \brief Returns integer 1 if float input is greater than or equal to 0, 1 otherwise
  \param cVector The int output (either 0 or 1)
  \param aVector The float input
  \param num_points The number of values in aVector and stored into cVector
*/
static inline void volk_32f_binary_slicer_32i_u_sse2(int* cVector, const float* aVector, unsigned int num_points){
    int* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;

    unsigned int quarter_points = num_points / 4;
    __m128 a_val, res_f;
    __m128i res_i, binary_i;
    __m128 zero_val;
    zero_val = _mm_set1_ps (0.0f);

    for(number = 0; number < quarter_points; number++){
        a_val = _mm_loadu_ps(aPtr);

        res_f = _mm_cmpge_ps (a_val, zero_val);
        res_i = _mm_cvtps_epi32 (res_f);
        binary_i = _mm_srli_epi32 (res_i, 31);


        _mm_storeu_si128((__m128i*)cPtr, binary_i);


        cPtr += 4;
        aPtr += 4;
    }

    for(number = quarter_points * 4; number < num_points; number++){
        if( *aPtr++ >= 0) {
            *cPtr++ = 1;
        }
        else {
            *cPtr++ = 0;
        }
    }
}
#endif /* LV_HAVE_SSE2 */


#ifdef LV_HAVE_AVX
#include <immintrin.h>
/*!
  \brief Returns integer 1 if float input is greater than or equal to 0, 1 otherwise
  \param cVector The int output (either 0 or 1)
  \param aVector The float input
  \param num_points The number of values in aVector and stored into cVector
*/
static inline void volk_32f_binary_slicer_32i_u_avx(int* cVector, const float* aVector, unsigned int num_points){
    int* cPtr = cVector;
    const float* aPtr = aVector;
    unsigned int number = 0;

    unsigned int quarter_points = num_points / 8;
    __m256 a_val, res_f, binary_f;
    __m256i binary_i;
    __m256 zero_val, one_val;
    zero_val = _mm256_set1_ps (0.0f);
    one_val = _mm256_set1_ps (1.0f);

    for(number = 0; number < quarter_points; number++){
        a_val = _mm256_loadu_ps(aPtr);

        res_f = _mm256_cmp_ps (a_val, zero_val, 13);
        binary_f = _mm256_and_ps (res_f, one_val);
        binary_i = _mm256_cvtps_epi32(binary_f);



        _mm256_storeu_si256((__m256i*)cPtr, binary_i);


        cPtr += 8;
        aPtr += 8;
    }

    for(number = quarter_points * 8; number < num_points; number++){
        if( *aPtr++ >= 0) {
            *cPtr++ = 1;
        }
        else {
            *cPtr++ = 0;
        }
    }
}
#endif /* LV_HAVE_AVX */



#endif /* INCLUDED_volk_32f_binary_slicer_32i_H */