mirror of https://github.com/gnss-sdr/gnss-sdr
875 lines
37 KiB
C
875 lines
37 KiB
C
/*!
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* \file volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3.h
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* \brief Volk protokernel: performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation with 16 bits vectors
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* \authors <ul>
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* <li> Andrés Cecilia, 2014. a.cecilia.luque(at)gmail.com
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* </ul>
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*
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* Volk protokernel that performs the carrier wipe-off mixing and the
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* Early, Prompt, and Late correlation with 16 bits vectors (8 bits the
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* real part and 8 bits the imaginary part):
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* - The carrier wipe-off is done by multiplying the input signal by the
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* carrier (multiplication of 16 bits vectors) It returns the input
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* signal in base band (BB)
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* - Early values are calculated by multiplying the input signal in BB by the
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* early code (multiplication of 16 bits vectors), accumulating the results
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* - Prompt values are calculated by multiplying the input signal in BB by the
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* prompt code (multiplication of 16 bits vectors), accumulating the results
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* - Late values are calculated by multiplying the input signal in BB by the
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* late code (multiplication of 16 bits vectors), accumulating the results
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2014 (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_gnsssdr_volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_u_H
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#define INCLUDED_gnsssdr_volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_u_H
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#include <inttypes.h>
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#include <stdio.h>
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#include <float.h>
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#include <string.h>
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#ifdef LV_HAVE_SSE4_1
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#include "smmintrin.h"
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/*!
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\brief Performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation
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\param input The input signal input
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\param carrier The carrier signal input
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\param E_code Early PRN code replica input
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\param P_code Early PRN code replica input
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\param L_code Early PRN code replica input
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\param E_out Early correlation output
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\param P_out Early correlation output
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\param L_out Early correlation output
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\param num_points The number of complex values in vectors
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*/
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static inline void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_u_sse4_1(lv_8sc_t* E_out, lv_8sc_t* P_out, lv_8sc_t* L_out, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, const lv_8sc_t* L_code, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 8;
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__m128i x, y, real_bb_signal_sample, imag_bb_signal_sample, real_E_code_acc, imag_E_code_acc, real_L_code_acc, imag_L_code_acc, real_P_code_acc, imag_P_code_acc;
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__m128i mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, output, real_output, imag_output;
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const lv_8sc_t* input_ptr = input;
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const lv_8sc_t* carrier_ptr = carrier;
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const lv_8sc_t* E_code_ptr = E_code;
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lv_8sc_t* E_out_ptr = E_out;
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const lv_8sc_t* L_code_ptr = L_code;
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lv_8sc_t* L_out_ptr = L_out;
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const lv_8sc_t* P_code_ptr = P_code;
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lv_8sc_t* P_out_ptr = P_out;
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*E_out_ptr = 0;
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*P_out_ptr = 0;
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*L_out_ptr = 0;
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mult1 = _mm_set_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
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real_E_code_acc = _mm_setzero_si128();
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imag_E_code_acc = _mm_setzero_si128();
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real_L_code_acc = _mm_setzero_si128();
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imag_L_code_acc = _mm_setzero_si128();
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real_P_code_acc = _mm_setzero_si128();
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imag_P_code_acc = _mm_setzero_si128();
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if (sse_iters>0)
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{
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for(int number = 0;number < sse_iters; number++){
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//Perform the carrier wipe-off
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x = _mm_lddqu_si128((__m128i*)input_ptr);
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y = _mm_lddqu_si128((__m128i*)carrier_ptr);
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imagx = _mm_srli_si128 (x, 1);
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imagx = _mm_and_si128 (imagx, mult1);
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realx = _mm_and_si128 (x, mult1);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (realx, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imagx, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (realx, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imagx, realy);
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real_bb_signal_sample = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_bb_signal_sample = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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//Get early values
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y = _mm_lddqu_si128((__m128i*)E_code_ptr);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
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real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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real_E_code_acc = _mm_add_epi16 (real_E_code_acc, real_output);
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imag_E_code_acc = _mm_add_epi16 (imag_E_code_acc, imag_output);
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//Get late values
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y = _mm_lddqu_si128((__m128i*)L_code_ptr);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
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real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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real_L_code_acc = _mm_add_epi16 (real_L_code_acc, real_output);
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imag_L_code_acc = _mm_add_epi16 (imag_L_code_acc, imag_output);
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//Get prompt values
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y = _mm_lddqu_si128((__m128i*)P_code_ptr);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
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real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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real_P_code_acc = _mm_add_epi16 (real_P_code_acc, real_output);
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imag_P_code_acc = _mm_add_epi16 (imag_P_code_acc, imag_output);
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input_ptr += 8;
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carrier_ptr += 8;
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E_code_ptr += 8;
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L_code_ptr += 8;
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P_code_ptr += 8;
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}
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__VOLK_ATTR_ALIGNED(16) lv_8sc_t E_dotProductVector[8];
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__VOLK_ATTR_ALIGNED(16) lv_8sc_t L_dotProductVector[8];
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__VOLK_ATTR_ALIGNED(16) lv_8sc_t P_dotProductVector[8];
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imag_E_code_acc = _mm_slli_si128 (imag_E_code_acc, 1);
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output = _mm_blendv_epi8 (imag_E_code_acc, real_E_code_acc, mult1);
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_mm_storeu_si128((__m128i*)E_dotProductVector, output);
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imag_L_code_acc = _mm_slli_si128 (imag_L_code_acc, 1);
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output = _mm_blendv_epi8 (imag_L_code_acc, real_L_code_acc, mult1);
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_mm_storeu_si128((__m128i*)L_dotProductVector, output);
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imag_P_code_acc = _mm_slli_si128 (imag_P_code_acc, 1);
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output = _mm_blendv_epi8 (imag_P_code_acc, real_P_code_acc, mult1);
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_mm_storeu_si128((__m128i*)P_dotProductVector, output);
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for (int i = 0; i<8; ++i)
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{
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*E_out_ptr += E_dotProductVector[i];
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*L_out_ptr += L_dotProductVector[i];
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*P_out_ptr += P_dotProductVector[i];
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}
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}
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lv_8sc_t bb_signal_sample;
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for(int i=0; i < num_points%8; ++i)
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{
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//Perform the carrier wipe-off
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bb_signal_sample = (*input_ptr++) * (*carrier_ptr++);
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// Now get early, late, and prompt values for each
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*E_out_ptr += bb_signal_sample * (*E_code_ptr++);
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*P_out_ptr += bb_signal_sample * (*P_code_ptr++);
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*L_out_ptr += bb_signal_sample * (*L_code_ptr++);
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}
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}
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#endif /* LV_HAVE_SSE4_1 */
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#ifdef LV_HAVE_SSE2
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#include "emmintrin.h"
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/*!
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\brief Performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation
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\param input The input signal input
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\param carrier The carrier signal input
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\param E_code Early PRN code replica input
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\param P_code Early PRN code replica input
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\param L_code Early PRN code replica input
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\param E_out Early correlation output
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\param P_out Early correlation output
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\param L_out Early correlation output
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\param num_points The number of complex values in vectors
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*/
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static inline void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_u_sse2(lv_8sc_t* E_out, lv_8sc_t* P_out, lv_8sc_t* L_out, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, const lv_8sc_t* L_code, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 8;
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__m128i x, y, real_bb_signal_sample, imag_bb_signal_sample, real_E_code_acc, imag_E_code_acc, real_L_code_acc, imag_L_code_acc, real_P_code_acc, imag_P_code_acc;
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__m128i mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, output, real_output, imag_output;
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const lv_8sc_t* input_ptr = input;
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const lv_8sc_t* carrier_ptr = carrier;
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const lv_8sc_t* E_code_ptr = E_code;
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lv_8sc_t* E_out_ptr = E_out;
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const lv_8sc_t* L_code_ptr = L_code;
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lv_8sc_t* L_out_ptr = L_out;
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const lv_8sc_t* P_code_ptr = P_code;
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lv_8sc_t* P_out_ptr = P_out;
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*E_out_ptr = 0;
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*P_out_ptr = 0;
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*L_out_ptr = 0;
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mult1 = _mm_set_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
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real_E_code_acc = _mm_setzero_si128();
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imag_E_code_acc = _mm_setzero_si128();
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real_L_code_acc = _mm_setzero_si128();
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imag_L_code_acc = _mm_setzero_si128();
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real_P_code_acc = _mm_setzero_si128();
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imag_P_code_acc = _mm_setzero_si128();
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if (sse_iters>0)
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{
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for(int number = 0;number < sse_iters; number++){
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//Perform the carrier wipe-off
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x = _mm_lddqu_si128((__m128i*)input_ptr);
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y = _mm_lddqu_si128((__m128i*)carrier_ptr);
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imagx = _mm_srli_si128 (x, 1);
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imagx = _mm_and_si128 (imagx, mult1);
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realx = _mm_and_si128 (x, mult1);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (realx, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imagx, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (realx, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imagx, realy);
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real_bb_signal_sample = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_bb_signal_sample = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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//Get early values
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y = _mm_lddqu_si128((__m128i*)E_code_ptr);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
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real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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real_E_code_acc = _mm_add_epi16 (real_E_code_acc, real_output);
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imag_E_code_acc = _mm_add_epi16 (imag_E_code_acc, imag_output);
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//Get late values
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y = _mm_lddqu_si128((__m128i*)L_code_ptr);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
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real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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real_L_code_acc = _mm_add_epi16 (real_L_code_acc, real_output);
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imag_L_code_acc = _mm_add_epi16 (imag_L_code_acc, imag_output);
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//Get prompt values
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y = _mm_lddqu_si128((__m128i*)P_code_ptr);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
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real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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real_P_code_acc = _mm_add_epi16 (real_P_code_acc, real_output);
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imag_P_code_acc = _mm_add_epi16 (imag_P_code_acc, imag_output);
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input_ptr += 8;
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carrier_ptr += 8;
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E_code_ptr += 8;
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L_code_ptr += 8;
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P_code_ptr += 8;
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}
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__VOLK_ATTR_ALIGNED(16) lv_8sc_t E_dotProductVector[8];
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__VOLK_ATTR_ALIGNED(16) lv_8sc_t L_dotProductVector[8];
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__VOLK_ATTR_ALIGNED(16) lv_8sc_t P_dotProductVector[8];
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real_E_code_acc = _mm_and_si128 (real_E_code_acc, mult1);
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imag_E_code_acc = _mm_and_si128 (imag_E_code_acc, mult1);
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imag_E_code_acc = _mm_slli_si128 (imag_E_code_acc, 1);
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output = _mm_or_si128 (real_E_code_acc, imag_E_code_acc);
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_mm_storeu_si128((__m128i*)E_dotProductVector, output);
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real_L_code_acc = _mm_and_si128 (real_L_code_acc, mult1);
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imag_L_code_acc = _mm_and_si128 (imag_L_code_acc, mult1);
|
|
imag_L_code_acc = _mm_slli_si128 (imag_L_code_acc, 1);
|
|
output = _mm_or_si128 (real_L_code_acc, imag_L_code_acc);
|
|
_mm_storeu_si128((__m128i*)L_dotProductVector, output);
|
|
|
|
real_P_code_acc = _mm_and_si128 (real_P_code_acc, mult1);
|
|
imag_P_code_acc = _mm_and_si128 (imag_P_code_acc, mult1);
|
|
imag_P_code_acc = _mm_slli_si128 (imag_P_code_acc, 1);
|
|
output = _mm_or_si128 (real_P_code_acc, imag_P_code_acc);
|
|
_mm_storeu_si128((__m128i*)P_dotProductVector, output);
|
|
|
|
for (int i = 0; i<8; ++i)
|
|
{
|
|
*E_out_ptr += E_dotProductVector[i];
|
|
*L_out_ptr += L_dotProductVector[i];
|
|
*P_out_ptr += P_dotProductVector[i];
|
|
}
|
|
}
|
|
|
|
lv_8sc_t bb_signal_sample;
|
|
for(int i=0; i < num_points%8; ++i)
|
|
{
|
|
//Perform the carrier wipe-off
|
|
bb_signal_sample = (*input_ptr++) * (*carrier_ptr++);
|
|
// Now get early, late, and prompt values for each
|
|
*E_out_ptr += bb_signal_sample * (*E_code_ptr++);
|
|
*P_out_ptr += bb_signal_sample * (*P_code_ptr++);
|
|
*L_out_ptr += bb_signal_sample * (*L_code_ptr++);
|
|
}
|
|
}
|
|
|
|
#endif /* LV_HAVE_SSE2 */
|
|
|
|
#ifdef LV_HAVE_GENERIC
|
|
/*!
|
|
\brief Performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation
|
|
\param input The input signal input
|
|
\param carrier The carrier signal input
|
|
\param E_code Early PRN code replica input
|
|
\param P_code Early PRN code replica input
|
|
\param L_code Early PRN code replica input
|
|
\param E_out Early correlation output
|
|
\param P_out Early correlation output
|
|
\param L_out Early correlation output
|
|
\param num_points The number of complex values in vectors
|
|
*/
|
|
static inline void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_generic(lv_8sc_t* E_out, lv_8sc_t* P_out, lv_8sc_t* L_out, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, const lv_8sc_t* L_code, unsigned int num_points)
|
|
{
|
|
lv_8sc_t bb_signal_sample;
|
|
|
|
bb_signal_sample = lv_cmake(0, 0);
|
|
|
|
*E_out = 0;
|
|
*P_out = 0;
|
|
*L_out = 0;
|
|
// perform Early, Prompt and Late correlation
|
|
for(int i=0; i < num_points; ++i)
|
|
{
|
|
//Perform the carrier wipe-off
|
|
bb_signal_sample = input[i] * carrier[i];
|
|
// Now get early, late, and prompt values for each
|
|
*E_out += bb_signal_sample * E_code[i];
|
|
*P_out += bb_signal_sample * P_code[i];
|
|
*L_out += bb_signal_sample * L_code[i];
|
|
}
|
|
}
|
|
|
|
#endif /* LV_HAVE_GENERIC */
|
|
|
|
#endif /* INCLUDED_gnsssdr_volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_u_H */
|
|
|
|
|
|
#ifndef INCLUDED_gnsssdr_volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_a_H
|
|
#define INCLUDED_gnsssdr_volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_a_H
|
|
|
|
#include <inttypes.h>
|
|
#include <stdio.h>
|
|
#include <volk_gnsssdr/volk_gnsssdr_complex.h>
|
|
#include <float.h>
|
|
#include <string.h>
|
|
|
|
#ifdef LV_HAVE_SSE4_1
|
|
#include "smmintrin.h"
|
|
/*!
|
|
\brief Performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation
|
|
\param input The input signal input
|
|
\param carrier The carrier signal input
|
|
\param E_code Early PRN code replica input
|
|
\param P_code Early PRN code replica input
|
|
\param L_code Early PRN code replica input
|
|
\param E_out Early correlation output
|
|
\param P_out Early correlation output
|
|
\param L_out Early correlation output
|
|
\param num_points The number of complex values in vectors
|
|
*/
|
|
static inline void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_a_sse4_1(lv_8sc_t* E_out, lv_8sc_t* P_out, lv_8sc_t* L_out, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, const lv_8sc_t* L_code, unsigned int num_points)
|
|
{
|
|
const unsigned int sse_iters = num_points / 8;
|
|
|
|
__m128i x, y, real_bb_signal_sample, imag_bb_signal_sample, real_E_code_acc, imag_E_code_acc, real_L_code_acc, imag_L_code_acc, real_P_code_acc, imag_P_code_acc;
|
|
__m128i mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, output, real_output, imag_output;
|
|
|
|
const lv_8sc_t* input_ptr = input;
|
|
const lv_8sc_t* carrier_ptr = carrier;
|
|
|
|
const lv_8sc_t* E_code_ptr = E_code;
|
|
lv_8sc_t* E_out_ptr = E_out;
|
|
const lv_8sc_t* L_code_ptr = L_code;
|
|
lv_8sc_t* L_out_ptr = L_out;
|
|
const lv_8sc_t* P_code_ptr = P_code;
|
|
lv_8sc_t* P_out_ptr = P_out;
|
|
|
|
*E_out_ptr = 0;
|
|
*P_out_ptr = 0;
|
|
*L_out_ptr = 0;
|
|
|
|
mult1 = _mm_set_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
|
|
|
|
real_E_code_acc = _mm_setzero_si128();
|
|
imag_E_code_acc = _mm_setzero_si128();
|
|
real_L_code_acc = _mm_setzero_si128();
|
|
imag_L_code_acc = _mm_setzero_si128();
|
|
real_P_code_acc = _mm_setzero_si128();
|
|
imag_P_code_acc = _mm_setzero_si128();
|
|
|
|
if (sse_iters>0)
|
|
{
|
|
for(int number = 0;number < sse_iters; number++){
|
|
|
|
//Perform the carrier wipe-off
|
|
x = _mm_load_si128((__m128i*)input_ptr);
|
|
y = _mm_load_si128((__m128i*)carrier_ptr);
|
|
|
|
imagx = _mm_srli_si128 (x, 1);
|
|
imagx = _mm_and_si128 (imagx, mult1);
|
|
realx = _mm_and_si128 (x, mult1);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (realx, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imagx, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (realx, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imagx, realy);
|
|
|
|
real_bb_signal_sample = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
|
|
imag_bb_signal_sample = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
//Get early values
|
|
y = _mm_load_si128((__m128i*)E_code_ptr);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
|
|
|
|
real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
|
|
imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
real_E_code_acc = _mm_add_epi16 (real_E_code_acc, real_output);
|
|
imag_E_code_acc = _mm_add_epi16 (imag_E_code_acc, imag_output);
|
|
|
|
//Get late values
|
|
y = _mm_load_si128((__m128i*)L_code_ptr);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
|
|
|
|
real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
|
|
imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
real_L_code_acc = _mm_add_epi16 (real_L_code_acc, real_output);
|
|
imag_L_code_acc = _mm_add_epi16 (imag_L_code_acc, imag_output);
|
|
|
|
//Get prompt values
|
|
y = _mm_load_si128((__m128i*)P_code_ptr);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
|
|
|
|
real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
|
|
imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
real_P_code_acc = _mm_add_epi16 (real_P_code_acc, real_output);
|
|
imag_P_code_acc = _mm_add_epi16 (imag_P_code_acc, imag_output);
|
|
|
|
input_ptr += 8;
|
|
carrier_ptr += 8;
|
|
E_code_ptr += 8;
|
|
L_code_ptr += 8;
|
|
P_code_ptr += 8;
|
|
}
|
|
|
|
__VOLK_ATTR_ALIGNED(16) lv_8sc_t E_dotProductVector[8];
|
|
__VOLK_ATTR_ALIGNED(16) lv_8sc_t L_dotProductVector[8];
|
|
__VOLK_ATTR_ALIGNED(16) lv_8sc_t P_dotProductVector[8];
|
|
|
|
imag_E_code_acc = _mm_slli_si128 (imag_E_code_acc, 1);
|
|
output = _mm_blendv_epi8 (imag_E_code_acc, real_E_code_acc, mult1);
|
|
_mm_store_si128((__m128i*)E_dotProductVector, output);
|
|
|
|
imag_L_code_acc = _mm_slli_si128 (imag_L_code_acc, 1);
|
|
output = _mm_blendv_epi8 (imag_L_code_acc, real_L_code_acc, mult1);
|
|
_mm_store_si128((__m128i*)L_dotProductVector, output);
|
|
|
|
imag_P_code_acc = _mm_slli_si128 (imag_P_code_acc, 1);
|
|
output = _mm_blendv_epi8 (imag_P_code_acc, real_P_code_acc, mult1);
|
|
_mm_store_si128((__m128i*)P_dotProductVector, output);
|
|
|
|
for (int i = 0; i<8; ++i)
|
|
{
|
|
*E_out_ptr += E_dotProductVector[i];
|
|
*L_out_ptr += L_dotProductVector[i];
|
|
*P_out_ptr += P_dotProductVector[i];
|
|
}
|
|
}
|
|
|
|
lv_8sc_t bb_signal_sample;
|
|
for(int i=0; i < num_points%8; ++i)
|
|
{
|
|
//Perform the carrier wipe-off
|
|
bb_signal_sample = (*input_ptr++) * (*carrier_ptr++);
|
|
// Now get early, late, and prompt values for each
|
|
*E_out_ptr += bb_signal_sample * (*E_code_ptr++);
|
|
*P_out_ptr += bb_signal_sample * (*P_code_ptr++);
|
|
*L_out_ptr += bb_signal_sample * (*L_code_ptr++);
|
|
}
|
|
}
|
|
|
|
#endif /* LV_HAVE_SSE4_1 */
|
|
|
|
#ifdef LV_HAVE_SSE2
|
|
#include "emmintrin.h"
|
|
/*!
|
|
\brief Performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation
|
|
\param input The input signal input
|
|
\param carrier The carrier signal input
|
|
\param E_code Early PRN code replica input
|
|
\param P_code Early PRN code replica input
|
|
\param L_code Early PRN code replica input
|
|
\param E_out Early correlation output
|
|
\param P_out Early correlation output
|
|
\param L_out Early correlation output
|
|
\param num_points The number of complex values in vectors
|
|
*/
|
|
static inline void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_a_sse2(lv_8sc_t* E_out, lv_8sc_t* P_out, lv_8sc_t* L_out, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, const lv_8sc_t* L_code, unsigned int num_points)
|
|
{
|
|
const unsigned int sse_iters = num_points / 8;
|
|
|
|
__m128i x, y, real_bb_signal_sample, imag_bb_signal_sample, real_E_code_acc, imag_E_code_acc, real_L_code_acc, imag_L_code_acc, real_P_code_acc, imag_P_code_acc;
|
|
__m128i mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, output, real_output, imag_output;
|
|
|
|
const lv_8sc_t* input_ptr = input;
|
|
const lv_8sc_t* carrier_ptr = carrier;
|
|
|
|
const lv_8sc_t* E_code_ptr = E_code;
|
|
lv_8sc_t* E_out_ptr = E_out;
|
|
const lv_8sc_t* L_code_ptr = L_code;
|
|
lv_8sc_t* L_out_ptr = L_out;
|
|
const lv_8sc_t* P_code_ptr = P_code;
|
|
lv_8sc_t* P_out_ptr = P_out;
|
|
|
|
*E_out_ptr = 0;
|
|
*P_out_ptr = 0;
|
|
*L_out_ptr = 0;
|
|
|
|
mult1 = _mm_set_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
|
|
|
|
real_E_code_acc = _mm_setzero_si128();
|
|
imag_E_code_acc = _mm_setzero_si128();
|
|
real_L_code_acc = _mm_setzero_si128();
|
|
imag_L_code_acc = _mm_setzero_si128();
|
|
real_P_code_acc = _mm_setzero_si128();
|
|
imag_P_code_acc = _mm_setzero_si128();
|
|
|
|
if (sse_iters>0)
|
|
{
|
|
for(int number = 0;number < sse_iters; number++){
|
|
|
|
//Perform the carrier wipe-off
|
|
x = _mm_load_si128((__m128i*)input_ptr);
|
|
y = _mm_load_si128((__m128i*)carrier_ptr);
|
|
|
|
imagx = _mm_srli_si128 (x, 1);
|
|
imagx = _mm_and_si128 (imagx, mult1);
|
|
realx = _mm_and_si128 (x, mult1);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (realx, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imagx, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (realx, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imagx, realy);
|
|
|
|
real_bb_signal_sample = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
|
|
imag_bb_signal_sample = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
//Get early values
|
|
y = _mm_load_si128((__m128i*)E_code_ptr);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
|
|
|
|
real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
|
|
imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
real_E_code_acc = _mm_add_epi16 (real_E_code_acc, real_output);
|
|
imag_E_code_acc = _mm_add_epi16 (imag_E_code_acc, imag_output);
|
|
|
|
//Get late values
|
|
y = _mm_load_si128((__m128i*)L_code_ptr);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
|
|
|
|
real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
|
|
imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
real_L_code_acc = _mm_add_epi16 (real_L_code_acc, real_output);
|
|
imag_L_code_acc = _mm_add_epi16 (imag_L_code_acc, imag_output);
|
|
|
|
//Get prompt values
|
|
y = _mm_load_si128((__m128i*)P_code_ptr);
|
|
|
|
imagy = _mm_srli_si128 (y, 1);
|
|
imagy = _mm_and_si128 (imagy, mult1);
|
|
realy = _mm_and_si128 (y, mult1);
|
|
|
|
realx_mult_realy = _mm_mullo_epi16 (real_bb_signal_sample, realy);
|
|
imagx_mult_imagy = _mm_mullo_epi16 (imag_bb_signal_sample, imagy);
|
|
realx_mult_imagy = _mm_mullo_epi16 (real_bb_signal_sample, imagy);
|
|
imagx_mult_realy = _mm_mullo_epi16 (imag_bb_signal_sample, realy);
|
|
|
|
real_output = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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|
imag_output = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
|
|
|
|
real_P_code_acc = _mm_add_epi16 (real_P_code_acc, real_output);
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|
imag_P_code_acc = _mm_add_epi16 (imag_P_code_acc, imag_output);
|
|
|
|
input_ptr += 8;
|
|
carrier_ptr += 8;
|
|
E_code_ptr += 8;
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|
L_code_ptr += 8;
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|
P_code_ptr += 8;
|
|
}
|
|
|
|
__VOLK_ATTR_ALIGNED(16) lv_8sc_t E_dotProductVector[8];
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__VOLK_ATTR_ALIGNED(16) lv_8sc_t L_dotProductVector[8];
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|
__VOLK_ATTR_ALIGNED(16) lv_8sc_t P_dotProductVector[8];
|
|
|
|
real_E_code_acc = _mm_and_si128 (real_E_code_acc, mult1);
|
|
imag_E_code_acc = _mm_and_si128 (imag_E_code_acc, mult1);
|
|
imag_E_code_acc = _mm_slli_si128 (imag_E_code_acc, 1);
|
|
output = _mm_or_si128 (real_E_code_acc, imag_E_code_acc);
|
|
_mm_store_si128((__m128i*)E_dotProductVector, output);
|
|
|
|
real_L_code_acc = _mm_and_si128 (real_L_code_acc, mult1);
|
|
imag_L_code_acc = _mm_and_si128 (imag_L_code_acc, mult1);
|
|
imag_L_code_acc = _mm_slli_si128 (imag_L_code_acc, 1);
|
|
output = _mm_or_si128 (real_L_code_acc, imag_L_code_acc);
|
|
_mm_store_si128((__m128i*)L_dotProductVector, output);
|
|
|
|
real_P_code_acc = _mm_and_si128 (real_P_code_acc, mult1);
|
|
imag_P_code_acc = _mm_and_si128 (imag_P_code_acc, mult1);
|
|
imag_P_code_acc = _mm_slli_si128 (imag_P_code_acc, 1);
|
|
output = _mm_or_si128 (real_P_code_acc, imag_P_code_acc);
|
|
_mm_store_si128((__m128i*)P_dotProductVector, output);
|
|
|
|
for (int i = 0; i<8; ++i)
|
|
{
|
|
*E_out_ptr += E_dotProductVector[i];
|
|
*L_out_ptr += L_dotProductVector[i];
|
|
*P_out_ptr += P_dotProductVector[i];
|
|
}
|
|
}
|
|
|
|
lv_8sc_t bb_signal_sample;
|
|
for(int i=0; i < num_points%8; ++i)
|
|
{
|
|
//Perform the carrier wipe-off
|
|
bb_signal_sample = (*input_ptr++) * (*carrier_ptr++);
|
|
// Now get early, late, and prompt values for each
|
|
*E_out_ptr += bb_signal_sample * (*E_code_ptr++);
|
|
*P_out_ptr += bb_signal_sample * (*P_code_ptr++);
|
|
*L_out_ptr += bb_signal_sample * (*L_code_ptr++);
|
|
}
|
|
}
|
|
|
|
#endif /* LV_HAVE_SSE2 */
|
|
|
|
#ifdef LV_HAVE_GENERIC
|
|
/*!
|
|
\brief Performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation
|
|
\param input The input signal input
|
|
\param carrier The carrier signal input
|
|
\param E_code Early PRN code replica input
|
|
\param P_code Early PRN code replica input
|
|
\param L_code Early PRN code replica input
|
|
\param E_out Early correlation output
|
|
\param P_out Early correlation output
|
|
\param L_out Early correlation output
|
|
\param num_points The number of complex values in vectors
|
|
*/
|
|
static inline void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_a_generic(lv_8sc_t* E_out, lv_8sc_t* P_out, lv_8sc_t* L_out, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, const lv_8sc_t* L_code, unsigned int num_points)
|
|
{
|
|
lv_8sc_t bb_signal_sample;
|
|
|
|
bb_signal_sample = lv_cmake(0, 0);
|
|
|
|
*E_out = 0;
|
|
*P_out = 0;
|
|
*L_out = 0;
|
|
// perform Early, Prompt and Late correlation
|
|
for(int i=0; i < num_points; ++i)
|
|
{
|
|
//Perform the carrier wipe-off
|
|
bb_signal_sample = input[i] * carrier[i];
|
|
// Now get early, late, and prompt values for each
|
|
*E_out += bb_signal_sample * E_code[i];
|
|
*P_out += bb_signal_sample * P_code[i];
|
|
*L_out += bb_signal_sample * L_code[i];
|
|
}
|
|
}
|
|
|
|
#endif /* LV_HAVE_GENERIC */
|
|
|
|
#ifdef LV_HAVE_ORC
|
|
/*!
|
|
\brief Performs the carrier wipe-off mixing and the Early, Prompt, and Late correlation
|
|
\param input The input signal input
|
|
\param carrier The carrier signal input
|
|
\param E_code Early PRN code replica input
|
|
\param P_code Early PRN code replica input
|
|
\param L_code Early PRN code replica input
|
|
\param E_out Early correlation output
|
|
\param P_out Early correlation output
|
|
\param L_out Early correlation output
|
|
\param num_points The number of complex values in vectors
|
|
*/
|
|
|
|
extern void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_first_a_orc_impl(short* E_out_real, short* E_out_imag, short* P_out_real, short* P_out_imag, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, unsigned int num_points);
|
|
extern void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_second_a_orc_impl(short* L_out_real, short* L_out_imag, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* L_code, unsigned int num_points);
|
|
static inline void volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_u_orc(lv_8sc_t* E_out, lv_8sc_t* P_out, lv_8sc_t* L_out, const lv_8sc_t* input, const lv_8sc_t* carrier, const lv_8sc_t* E_code, const lv_8sc_t* P_code, const lv_8sc_t* L_code, unsigned int num_points){
|
|
|
|
short E_out_real = 0;
|
|
short E_out_imag = 0;
|
|
char* E_out_real_c = (char*)&E_out_real;
|
|
E_out_real_c++;
|
|
char* E_out_imag_c = (char*)&E_out_imag;
|
|
E_out_imag_c++;
|
|
|
|
short P_out_real = 0;
|
|
short P_out_imag = 0;
|
|
char* P_out_real_c = (char*)&P_out_real;
|
|
P_out_real_c++;
|
|
char* P_out_imag_c = (char*)&P_out_imag;
|
|
P_out_imag_c++;
|
|
|
|
short L_out_real = 0;
|
|
short L_out_imag = 0;
|
|
char* L_out_real_c = (char*)&L_out_real;
|
|
L_out_real_c++;
|
|
char* L_out_imag_c = (char*)&L_out_imag;
|
|
L_out_imag_c++;
|
|
|
|
volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_first_a_orc_impl( &E_out_real, &E_out_imag, &P_out_real, &P_out_imag, input, carrier, E_code, P_code, num_points);
|
|
volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_second_a_orc_impl( &L_out_real, &L_out_imag, input, carrier, L_code, num_points);
|
|
|
|
//ORC implementation of 8ic_x5_cw_epl_corr_8ic_x3 is done in two different functions because it seems that
|
|
//in one function the length of the code gives memory problems (bad access, segmentation fault).
|
|
//Also, the maximum number of accumulators that can be used is 4 (and we need 6).
|
|
//The "carrier wipe-off" step is done two times: one in the first function and another one in the second.
|
|
//Joining all the ORC code in one function would be quicker because the "carrier wipe-off" step would be done just
|
|
//one time.
|
|
|
|
*E_out = lv_cmake(*E_out_real_c, *E_out_imag_c);
|
|
*P_out = lv_cmake(*P_out_real_c, *P_out_imag_c);
|
|
*L_out = lv_cmake(*L_out_real_c, *L_out_imag_c);
|
|
}
|
|
#endif /* LV_HAVE_ORC */
|
|
|
|
#endif /* INCLUDED_gnsssdr_volk_gnsssdr_8ic_x5_cw_epl_corr_8ic_x3_a_H */
|