mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2025-01-29 02:14:51 +00:00
Adding new resampler kernel and integrating it in the multicorrelator
This commit is contained in:
Carles Fernandez
parent
70a2c5837c
commit
9eb175fb0e
@ -45,7 +45,7 @@
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static inline void volk_gnsssdr_16ic_resamplerxnpuppet_16ic_generic(lv_16sc_t* result, const lv_16sc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.1;
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int code_length_chips = 1023;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float* rem_code_phase_chips = (float*)volk_gnsssdr_malloc(sizeof(float) * num_out_vectors, volk_gnsssdr_get_alignment());
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@ -73,7 +73,7 @@ static inline void volk_gnsssdr_16ic_resamplerxnpuppet_16ic_generic(lv_16sc_t* r
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static inline void volk_gnsssdr_16ic_resamplerxnpuppet_16ic_a_sse2(lv_16sc_t* result, const lv_16sc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.1;
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int code_length_chips = 1023;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float * rem_code_phase_chips = (float*)volk_gnsssdr_malloc(sizeof(float) * num_out_vectors, volk_gnsssdr_get_alignment());
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lv_16sc_t** result_aux = (lv_16sc_t**)volk_gnsssdr_malloc(sizeof(lv_16sc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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@ -100,7 +100,7 @@ static inline void volk_gnsssdr_16ic_resamplerxnpuppet_16ic_a_sse2(lv_16sc_t* re
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static inline void volk_gnsssdr_16ic_resamplerxnpuppet_16ic_u_sse2(lv_16sc_t* result, const lv_16sc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.1;
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int code_length_chips = 1023;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float * rem_code_phase_chips = (float*)volk_gnsssdr_malloc(sizeof(float) * num_out_vectors, volk_gnsssdr_get_alignment());
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lv_16sc_t** result_aux = (lv_16sc_t**)volk_gnsssdr_malloc(sizeof(lv_16sc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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@ -127,7 +127,7 @@ static inline void volk_gnsssdr_16ic_resamplerxnpuppet_16ic_u_sse2(lv_16sc_t* re
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static inline void volk_gnsssdr_16ic_resamplerxnpuppet_16ic_neon(lv_16sc_t* result, const lv_16sc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.1;
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int code_length_chips = 1023;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float * rem_code_phase_chips = (float*)volk_gnsssdr_malloc(sizeof(float) * num_out_vectors, volk_gnsssdr_get_alignment());
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lv_16sc_t** result_aux = (lv_16sc_t**)volk_gnsssdr_malloc(sizeof(lv_16sc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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@ -0,0 +1,248 @@
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/*!
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* \file volk_gnsssdr_32fc_resamplerxnpuppet_32fc.h
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* \brief VOLK_GNSSSDR puppet for the multiple 16-bit complex vector resampler kernel.
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* \authors <ul>
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* <li> Carles Fernandez Prades 2016 cfernandez at cttc dot cat
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* </ul>
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*
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* VOLK_GNSSSDR puppet for integrating the multiple resampler into the test system
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef INCLUDED_volk_gnsssdr_32fc_resamplerxnpuppet_32fc_H
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#define INCLUDED_volk_gnsssdr_32fc_resamplerxnpuppet_32fc_H
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#include "volk_gnsssdr/volk_gnsssdr_32fc_xn_resampler_32fc_xn.h"
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#include <volk_gnsssdr/volk_gnsssdr_malloc.h>
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#include <volk_gnsssdr/volk_gnsssdr.h>
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#include <string.h>
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#ifdef LV_HAVE_GENERIC
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static inline void volk_gnsssdr_32fc_resamplerxnpuppet_32fc_generic(lv_32fc_t* result, const lv_32fc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.6;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float rem_code_phase_chips = -0.234;
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float shifts_chips[3] = { -0.1, 0.0, 0.1 };
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lv_32fc_t** result_aux = (lv_32fc_t**)volk_gnsssdr_malloc(sizeof(lv_32fc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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result_aux[n] = (lv_32fc_t*)volk_gnsssdr_malloc(sizeof(lv_32fc_t) * num_points, volk_gnsssdr_get_alignment());
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}
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volk_gnsssdr_32fc_xn_resampler_32fc_xn_generic(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
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memcpy((lv_32fc_t*)result, (lv_32fc_t*)result_aux[0], sizeof(lv_32fc_t) * num_points);
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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volk_gnsssdr_free(result_aux[n]);
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}
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volk_gnsssdr_free(result_aux);
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}
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#endif /* LV_HAVE_GENERIC */
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#ifdef LV_HAVE_SSE3
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static inline void volk_gnsssdr_32fc_resamplerxnpuppet_32fc_a_sse3(lv_32fc_t* result, const lv_32fc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.6;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float rem_code_phase_chips = -0.234;
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float shifts_chips[3] = { -0.1, 0.0, 0.1 };
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lv_32fc_t** result_aux = (lv_32fc_t**)volk_gnsssdr_malloc(sizeof(lv_32fc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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result_aux[n] = (lv_32fc_t*)volk_gnsssdr_malloc(sizeof(lv_32fc_t) * num_points, volk_gnsssdr_get_alignment());
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}
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volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse3(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
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memcpy((lv_32fc_t*)result, (lv_32fc_t*)result_aux[0], sizeof(lv_32fc_t) * num_points);
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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volk_gnsssdr_free(result_aux[n]);
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}
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volk_gnsssdr_free(result_aux);
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}
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#endif
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#ifdef LV_HAVE_SSE3
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static inline void volk_gnsssdr_32fc_resamplerxnpuppet_32fc_u_sse3(lv_32fc_t* result, const lv_32fc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.6;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float rem_code_phase_chips = -0.234;
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float shifts_chips[3] = { -0.1, 0.0, 0.1 };
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lv_32fc_t** result_aux = (lv_32fc_t**)volk_gnsssdr_malloc(sizeof(lv_32fc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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result_aux[n] = (lv_32fc_t*)volk_gnsssdr_malloc(sizeof(lv_32fc_t) * num_points, volk_gnsssdr_get_alignment());
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}
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volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse3(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
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memcpy((lv_32fc_t*)result, (lv_32fc_t*)result_aux[0], sizeof(lv_32fc_t) * num_points);
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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volk_gnsssdr_free(result_aux[n]);
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}
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volk_gnsssdr_free(result_aux);
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}
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#endif
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#ifdef LV_HAVE_SSE4_1
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static inline void volk_gnsssdr_32fc_resamplerxnpuppet_32fc_u_sse4_1(lv_32fc_t* result, const lv_32fc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.6;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float rem_code_phase_chips = -0.234;
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float shifts_chips[3] = { -0.1, 0.0, 0.1 };
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lv_32fc_t** result_aux = (lv_32fc_t**)volk_gnsssdr_malloc(sizeof(lv_32fc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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result_aux[n] = (lv_32fc_t*)volk_gnsssdr_malloc(sizeof(lv_32fc_t) * num_points, volk_gnsssdr_get_alignment());
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}
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volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse4_1(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
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memcpy((lv_32fc_t*)result, (lv_32fc_t*)result_aux[0], sizeof(lv_32fc_t) * num_points);
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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volk_gnsssdr_free(result_aux[n]);
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}
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volk_gnsssdr_free(result_aux);
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}
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#endif
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#ifdef LV_HAVE_SSE4_1
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static inline void volk_gnsssdr_32fc_resamplerxnpuppet_32fc_a_sse4_1(lv_32fc_t* result, const lv_32fc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.6;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float rem_code_phase_chips = -0.234;
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float shifts_chips[3] = { -0.1, 0.0, 0.1 };
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lv_32fc_t** result_aux = (lv_32fc_t**)volk_gnsssdr_malloc(sizeof(lv_32fc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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result_aux[n] = (lv_32fc_t*)volk_gnsssdr_malloc(sizeof(lv_32fc_t) * num_points, volk_gnsssdr_get_alignment());
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}
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volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse4_1(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
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memcpy((lv_32fc_t*)result, (lv_32fc_t*)result_aux[0], sizeof(lv_32fc_t) * num_points);
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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volk_gnsssdr_free(result_aux[n]);
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}
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volk_gnsssdr_free(result_aux);
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}
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#endif
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#ifdef LV_HAVE_AVX
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static inline void volk_gnsssdr_32fc_resamplerxnpuppet_32fc_a_avx(lv_32fc_t* result, const lv_32fc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.6;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float rem_code_phase_chips = -0.234;
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float shifts_chips[3] = { -0.1, 0.0, 0.1 };
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lv_32fc_t** result_aux = (lv_32fc_t**)volk_gnsssdr_malloc(sizeof(lv_32fc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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result_aux[n] = (lv_32fc_t*)volk_gnsssdr_malloc(sizeof(lv_32fc_t) * num_points, volk_gnsssdr_get_alignment());
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}
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volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_avx(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
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memcpy((lv_32fc_t*)result, (lv_32fc_t*)result_aux[0], sizeof(lv_32fc_t) * num_points);
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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volk_gnsssdr_free(result_aux[n]);
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}
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volk_gnsssdr_free(result_aux);
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}
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#endif
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#ifdef LV_HAVE_AVX
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static inline void volk_gnsssdr_32fc_resamplerxnpuppet_32fc_u_avx(lv_32fc_t* result, const lv_32fc_t* local_code, unsigned int num_points)
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{
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float code_phase_step_chips = 0.6;
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int code_length_chips = 2046;
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int num_out_vectors = 3;
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float rem_code_phase_chips = -0.234;
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float shifts_chips[3] = { -0.1, 0.0, 0.1 };
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lv_32fc_t** result_aux = (lv_32fc_t**)volk_gnsssdr_malloc(sizeof(lv_32fc_t*) * num_out_vectors, volk_gnsssdr_get_alignment());
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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result_aux[n] = (lv_32fc_t*)volk_gnsssdr_malloc(sizeof(lv_32fc_t) * num_points, volk_gnsssdr_get_alignment());
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}
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volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_avx(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
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memcpy((lv_32fc_t*)result, (lv_32fc_t*)result_aux[0], sizeof(lv_32fc_t) * num_points);
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for(unsigned int n = 0; n < num_out_vectors; n++)
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{
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volk_gnsssdr_free(result_aux[n]);
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}
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volk_gnsssdr_free(result_aux);
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}
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#endif
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#endif // INCLUDED_volk_gnsssdr_32fc_resamplerpuppet_32fc_H
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@ -0,0 +1,290 @@
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/*!
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* \file volk_gnsssdr_16ic_xn_resampler_16ic_xn.h
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* \brief VOLK_GNSSSDR kernel: Resamples N 16 bits integer short complex vectors using zero hold resample algorithm.
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* \authors <ul>
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* <li> Javier Arribas, 2015. jarribas(at)cttc.es
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* </ul>
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*
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* VOLK_GNSSSDR kernel that esamples N 16 bits integer short complex vectors using zero hold resample algorithm.
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* It is optimized to resample a sigle GNSS local code signal replica into N vectors fractional-resampled and fractional-delayed
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* (i.e. it creates the Early, Prompt, and Late code replicas)
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
|
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
|
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*
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* You should have received a copy of the GNU General Public License
|
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* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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/*!
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* \page volk_gnsssdr_16ic_xn_resampler_16ic_xn
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*
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* \b Overview
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*
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* Resamples a complex vector (16-bit integer each component), providing \p num_out_vectors outputs.
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*
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* <b>Dispatcher Prototype</b>
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* \code
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* void volk_gnsssdr_16ic_xn_resampler_16ic_xn(lv_16sc_t** result, const lv_16sc_t* local_code, float* rem_code_phase_chips, float code_phase_step_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
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* \endcode
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*
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* \b Inputs
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* \li local_code: One of the vectors to be multiplied.
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* \li rem_code_phase_chips: Remnant code phase [chips].
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* \li code_phase_step_chips: Phase increment per sample [chips/sample].
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* \li code_length_chips: Code length in chips.
|
||||
* \li num_out_vectors Number of output vectors.
|
||||
* \li num_output_samples: The number of data values to be in the resampled vector.
|
||||
*
|
||||
* \b Outputs
|
||||
* \li result: Pointer to a vector of pointers where the results will be stored.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef INCLUDED_volk_gnsssdr_32fc_xn_resampler_32fc_xn_H
|
||||
#define INCLUDED_volk_gnsssdr_32fc_xn_resampler_32fc_xn_H
|
||||
|
||||
#include <math.h>
|
||||
#include <volk_gnsssdr/volk_gnsssdr_common.h>
|
||||
#include <volk_gnsssdr/volk_gnsssdr_complex.h>
|
||||
|
||||
//#pragma STDC FENV_ACCESS ON
|
||||
|
||||
#ifdef LV_HAVE_GENERIC
|
||||
|
||||
|
||||
static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_generic(lv_32fc_t** result, const lv_32fc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
|
||||
{
|
||||
int local_code_chip_index;
|
||||
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
|
||||
{
|
||||
for (int n = 0; n < num_output_samples; n++)
|
||||
{
|
||||
// resample code for current tap
|
||||
local_code_chip_index = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
|
||||
local_code_chip_index = local_code_chip_index % code_length_chips;
|
||||
//Take into account that in multitap correlators, the shifts can be negative!
|
||||
if (local_code_chip_index < 0) local_code_chip_index += code_length_chips;
|
||||
result[current_correlator_tap][n] = local_code[local_code_chip_index];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif /*LV_HAVE_GENERIC*/
|
||||
|
||||
|
||||
#ifdef LV_HAVE_SSE3
|
||||
#include <pmmintrin.h>
|
||||
static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse3(lv_32fc_t** result, const lv_32fc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
|
||||
{
|
||||
lv_32fc_t** _result = result;
|
||||
const unsigned int quarterPoints = num_output_samples / 4;
|
||||
|
||||
const __m128 ones = _mm_set1_ps(1.0f);
|
||||
const __m128 fours = _mm_set1_ps(4.0f);
|
||||
const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips);
|
||||
const __m128 code_phase_step_chips_reg = _mm_set_ps1(code_phase_step_chips);
|
||||
|
||||
__attribute__((aligned(16))) int local_code_chip_index[4];
|
||||
int local_code_chip_index_;
|
||||
|
||||
const __m128i zeros = _mm_setzero_si128();
|
||||
const __m128 code_length_chips_reg_f = _mm_set_ps1((float)code_length_chips);
|
||||
const __m128i code_length_chips_reg_i = _mm_set1_epi32((int)code_length_chips);
|
||||
__m128i local_code_chip_index_reg, aux_i, negatives, i;
|
||||
__m128 aux, aux2, shifts_chips_reg, fi, igx, j, c, cTrunc, base;
|
||||
|
||||
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
|
||||
{
|
||||
shifts_chips_reg = _mm_set_ps1((float)shifts_chips[current_correlator_tap]);
|
||||
aux2 = _mm_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg);
|
||||
__m128 indexn = _mm_set_ps(3.0f, 2.0f, 1.0f, 0.0f);
|
||||
for(unsigned int n = 0; n < quarterPoints; n++)
|
||||
{
|
||||
aux = _mm_mul_ps(code_phase_step_chips_reg, indexn);
|
||||
aux = _mm_add_ps(aux, aux2);
|
||||
// floor
|
||||
i = _mm_cvttps_epi32(aux);
|
||||
fi = _mm_cvtepi32_ps(i);
|
||||
igx = _mm_cmpgt_ps(fi, aux);
|
||||
j = _mm_and_ps(igx, ones);
|
||||
aux = _mm_sub_ps(fi, j);
|
||||
// fmod
|
||||
c = _mm_div_ps(aux, code_length_chips_reg_f);
|
||||
i = _mm_cvttps_epi32(c);
|
||||
cTrunc = _mm_cvtepi32_ps(i);
|
||||
base = _mm_mul_ps(cTrunc, code_length_chips_reg_f);
|
||||
local_code_chip_index_reg = _mm_cvtps_epi32(_mm_sub_ps(aux, base));
|
||||
|
||||
negatives = _mm_cmplt_epi32(local_code_chip_index_reg, zeros);
|
||||
aux_i = _mm_and_si128(code_length_chips_reg_i, negatives);
|
||||
local_code_chip_index_reg = _mm_add_epi32(local_code_chip_index_reg, aux_i);
|
||||
_mm_store_si128((__m128i*)local_code_chip_index, local_code_chip_index_reg);
|
||||
for(unsigned int k = 0; k < 4; ++k)
|
||||
{
|
||||
_result[current_correlator_tap][n * 4 + k] = local_code[local_code_chip_index[k]];
|
||||
}
|
||||
indexn = _mm_add_ps(indexn, fours);
|
||||
}
|
||||
for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
|
||||
{
|
||||
// resample code for current tap
|
||||
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
|
||||
local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
|
||||
//Take into account that in multitap correlators, the shifts can be negative!
|
||||
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
|
||||
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef LV_HAVE_SSE4_1
|
||||
#include <smmintrin.h>
|
||||
static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse4_1(lv_32fc_t** result, const lv_32fc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
|
||||
{
|
||||
lv_32fc_t** _result = result;
|
||||
const unsigned int quarterPoints = num_output_samples / 4;
|
||||
|
||||
const __m128 fours = _mm_set1_ps(4.0f);
|
||||
const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips);
|
||||
const __m128 code_phase_step_chips_reg = _mm_set_ps1(code_phase_step_chips);
|
||||
|
||||
__attribute__((aligned(16))) int local_code_chip_index[4];
|
||||
int local_code_chip_index_;
|
||||
|
||||
const __m128i zeros = _mm_setzero_si128();
|
||||
const __m128 code_length_chips_reg_f = _mm_set_ps1((float)code_length_chips);
|
||||
const __m128i code_length_chips_reg_i = _mm_set1_epi32((int)code_length_chips);
|
||||
__m128i local_code_chip_index_reg, aux_i, negatives, i;
|
||||
__m128 aux, aux2, shifts_chips_reg, c, cTrunc, base;
|
||||
|
||||
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
|
||||
{
|
||||
shifts_chips_reg = _mm_set_ps1((float)shifts_chips[current_correlator_tap]);
|
||||
aux2 = _mm_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg);
|
||||
__m128 indexn = _mm_set_ps(3.0f, 2.0f, 1.0f, 0.0f);
|
||||
for(unsigned int n = 0; n < quarterPoints; n++)
|
||||
{
|
||||
aux = _mm_mul_ps(code_phase_step_chips_reg, indexn);
|
||||
aux = _mm_add_ps(aux, aux2);
|
||||
// floor
|
||||
aux = _mm_floor_ps(aux);
|
||||
|
||||
// fmod
|
||||
c = _mm_div_ps(aux, code_length_chips_reg_f);
|
||||
i = _mm_cvttps_epi32(c);
|
||||
cTrunc = _mm_cvtepi32_ps(i);
|
||||
base = _mm_mul_ps(cTrunc, code_length_chips_reg_f);
|
||||
local_code_chip_index_reg = _mm_cvtps_epi32(_mm_sub_ps(aux, base));
|
||||
|
||||
negatives = _mm_cmplt_epi32(local_code_chip_index_reg, zeros);
|
||||
aux_i = _mm_and_si128(code_length_chips_reg_i, negatives);
|
||||
local_code_chip_index_reg = _mm_add_epi32(local_code_chip_index_reg, aux_i);
|
||||
_mm_store_si128((__m128i*)local_code_chip_index, local_code_chip_index_reg);
|
||||
for(unsigned int k = 0; k < 4; ++k)
|
||||
{
|
||||
_result[current_correlator_tap][n * 4 + k] = local_code[local_code_chip_index[k]];
|
||||
}
|
||||
indexn = _mm_add_ps(indexn, fours);
|
||||
}
|
||||
for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
|
||||
{
|
||||
// resample code for current tap
|
||||
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
|
||||
local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
|
||||
//Take into account that in multitap correlators, the shifts can be negative!
|
||||
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
|
||||
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef LV_HAVE_AVX
|
||||
#include <immintrin.h>
|
||||
static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_avx(lv_32fc_t** result, const lv_32fc_t* local_code, float rem_code_phase_chips, float code_phase_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_output_samples)
|
||||
{
|
||||
lv_32fc_t** _result = result;
|
||||
const unsigned int avx_iters = num_output_samples / 8;
|
||||
|
||||
const __m256 eights = _mm256_set1_ps(8.0f);
|
||||
const __m256 rem_code_phase_chips_reg = _mm256_set1_ps(rem_code_phase_chips);
|
||||
const __m256 code_phase_step_chips_reg = _mm256_set1_ps(code_phase_step_chips);
|
||||
|
||||
__attribute__((aligned(32))) int local_code_chip_index[8];
|
||||
int local_code_chip_index_;
|
||||
|
||||
const __m256 zeros = _mm256_setzero_ps();
|
||||
const __m256 code_length_chips_reg_f = _mm256_set1_ps((float)code_length_chips);
|
||||
|
||||
__m256i local_code_chip_index_reg, i;
|
||||
__m256 aux, aux2, shifts_chips_reg, c, cTrunc, base, negatives;
|
||||
|
||||
for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
|
||||
{
|
||||
shifts_chips_reg = _mm256_set1_ps((float)shifts_chips[current_correlator_tap]);
|
||||
aux2 = _mm256_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg);
|
||||
__m256 indexn = _mm256_set_ps(7.0f, 6.0f, 5.0f, 4.0f, 3.0f, 2.0f, 1.0f, 0.0f);
|
||||
for(unsigned int n = 0; n < avx_iters; n++)
|
||||
{
|
||||
aux = _mm256_mul_ps(code_phase_step_chips_reg, indexn);
|
||||
aux = _mm256_add_ps(aux, aux2);
|
||||
// floor
|
||||
aux = _mm256_floor_ps(aux);
|
||||
|
||||
// fmod
|
||||
c = _mm256_div_ps(aux, code_length_chips_reg_f);
|
||||
i = _mm256_cvttps_epi32(c);
|
||||
cTrunc = _mm256_cvtepi32_ps(i);
|
||||
base = _mm256_mul_ps(cTrunc, code_length_chips_reg_f);
|
||||
aux = _mm256_sub_ps(aux, base);
|
||||
|
||||
negatives = _mm256_cmp_ps(aux, zeros, 0x01);
|
||||
aux2 = _mm256_and_ps(code_length_chips_reg_f, negatives);
|
||||
local_code_chip_index_reg = _mm256_cvtps_epi32(_mm256_add_ps(aux, aux2));
|
||||
_mm256_store_si256((__m256i*)local_code_chip_index, local_code_chip_index_reg);
|
||||
for(unsigned int k = 0; k < 8; ++k)
|
||||
{
|
||||
_result[current_correlator_tap][n * 8 + k] = local_code[local_code_chip_index[k]];
|
||||
}
|
||||
indexn = _mm256_add_ps(indexn, eights);
|
||||
}
|
||||
_mm256_zeroupper();
|
||||
for(unsigned int n = avx_iters * 8; n < num_output_samples; n++)
|
||||
{
|
||||
// resample code for current tap
|
||||
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
|
||||
local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
|
||||
//Take into account that in multitap correlators, the shifts can be negative!
|
||||
if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
|
||||
_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /*INCLUDED_volk_gnsssdr_16ic_xn_resampler_16ic_xn_H*/
|
||||
|
||||
@ -35,7 +35,6 @@
|
||||
#include "cpu_multicorrelator.h"
|
||||
#include <cmath>
|
||||
#include <iostream>
|
||||
#include <volk/volk.h>
|
||||
#include <volk_gnsssdr/volk_gnsssdr.h>
|
||||
|
||||
|
||||
@ -68,10 +67,10 @@ bool cpu_multicorrelator::init(
|
||||
// ALLOCATE MEMORY FOR INTERNAL vectors
|
||||
size_t size = max_signal_length_samples * sizeof(std::complex<float>);
|
||||
|
||||
d_local_codes_resampled = static_cast<std::complex<float>**>(volk_malloc(n_correlators * sizeof(std::complex<float>), volk_get_alignment()));
|
||||
d_local_codes_resampled = static_cast<std::complex<float>**>(volk_gnsssdr_malloc(n_correlators * sizeof(std::complex<float>), volk_gnsssdr_get_alignment()));
|
||||
for (int n = 0; n < n_correlators; n++)
|
||||
{
|
||||
d_local_codes_resampled[n] = static_cast<std::complex<float>*>(volk_malloc(size, volk_get_alignment()));
|
||||
d_local_codes_resampled[n] = static_cast<std::complex<float>*>(volk_gnsssdr_malloc(size, volk_gnsssdr_get_alignment()));
|
||||
}
|
||||
d_n_correlators = n_correlators;
|
||||
return true;
|
||||
@ -100,23 +99,17 @@ bool cpu_multicorrelator::set_input_output_vectors(std::complex<float>* corr_out
|
||||
return true;
|
||||
}
|
||||
|
||||
void cpu_multicorrelator::update_local_code(int correlator_length_samples,float rem_code_phase_chips, float code_phase_step_chips)
|
||||
|
||||
void cpu_multicorrelator::update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips)
|
||||
{
|
||||
int local_code_chip_index;
|
||||
for (int current_correlator_tap = 0; current_correlator_tap < d_n_correlators; current_correlator_tap++)
|
||||
|
||||
{
|
||||
for (int n = 0; n < correlator_length_samples; n++)
|
||||
{
|
||||
// resample code for current tap
|
||||
local_code_chip_index = floor(code_phase_step_chips*static_cast<float>(n) + d_shifts_chips[current_correlator_tap]- rem_code_phase_chips);
|
||||
local_code_chip_index = local_code_chip_index % d_code_length_chips;
|
||||
//Take into account that in multitap correlators, the shifts can be negative!
|
||||
if (local_code_chip_index < 0) local_code_chip_index += d_code_length_chips;
|
||||
d_local_codes_resampled[current_correlator_tap][n] = d_local_code_in[local_code_chip_index];
|
||||
}
|
||||
}
|
||||
|
||||
volk_gnsssdr_32fc_xn_resampler_32fc_xn(d_local_codes_resampled,
|
||||
d_local_code_in,
|
||||
rem_code_phase_chips,
|
||||
code_phase_step_chips,
|
||||
d_shifts_chips,
|
||||
correlator_length_samples,
|
||||
d_n_correlators,
|
||||
d_code_length_chips);
|
||||
}
|
||||
|
||||
|
||||
@ -142,9 +135,9 @@ bool cpu_multicorrelator::free()
|
||||
// Free memory
|
||||
for (int n = 0; n < d_n_correlators; n++)
|
||||
{
|
||||
volk_free(d_local_codes_resampled[n]);
|
||||
volk_gnsssdr_free(d_local_codes_resampled[n]);
|
||||
}
|
||||
volk_free(d_local_codes_resampled);
|
||||
volk_gnsssdr_free(d_local_codes_resampled);
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user