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https://github.com/gnss-sdr/gnss-sdr
synced 2024-12-14 12:10:34 +00:00
adding NEON protokernel
This commit is contained in:
Carles Fernandez
parent
a71b118170
commit
f6cfc64cf7
@ -1,12 +1,12 @@
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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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* \file volk_gnsssdr_32fc_xn_resampler_32fc_xn.h
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* \brief VOLK_GNSSSDR kernel: Resamples N complex 32-bit float 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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* VOLK_GNSSSDR kernel that esamples N complex 32-bit float vectors using zero hold resample algorithm.
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* It is optimized to resample a single 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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@ -35,24 +35,25 @@
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*/
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/*!
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* \page volk_gnsssdr_16ic_xn_resampler_16ic_xn
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* \page volk_gnsssdr_32fc_xn_resampler_32fc_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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* Resamples a complex vector (32-bit float 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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* void volk_gnsssdr_32fc_xn_resampler_32fc_xn(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_points)
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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 shifts_chips: Vector of floats that defines the spacing (in chips) between the replicas of \p local_code
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* \li code_length_chips: Code length in chips.
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* \li num_out_vectors Number of output vectors.
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* \li num_output_samples: The number of data values to be in the resampled vector.
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* \li num_points: The number of data values to be in the resampled vector.
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*
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* \b Outputs
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* \li result: Pointer to a vector of pointers where the results will be stored.
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@ -66,17 +67,16 @@
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#include <volk_gnsssdr/volk_gnsssdr_common.h>
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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//#pragma STDC FENV_ACCESS ON
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#ifdef LV_HAVE_GENERIC
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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)
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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_points)
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{
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int local_code_chip_index;
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for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
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{
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for (int n = 0; n < num_output_samples; n++)
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for (int n = 0; n < num_points; n++)
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{
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// resample code for current tap
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local_code_chip_index = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
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@ -93,17 +93,17 @@ static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_generic(lv_32fc_t** re
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#ifdef LV_HAVE_SSE3
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#include <pmmintrin.h>
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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)
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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_points)
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{
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lv_32fc_t** _result = result;
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const unsigned int quarterPoints = num_output_samples / 4;
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const unsigned int quarterPoints = num_points / 4;
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const __m128 ones = _mm_set1_ps(1.0f);
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const __m128 fours = _mm_set1_ps(4.0f);
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const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips);
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const __m128 code_phase_step_chips_reg = _mm_set_ps1(code_phase_step_chips);
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__attribute__((aligned(16))) int local_code_chip_index[4];
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__VOLK_ATTR_ALIGNED(16) int local_code_chip_index[4];
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int local_code_chip_index_;
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const __m128i zeros = _mm_setzero_si128();
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@ -144,7 +144,7 @@ static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse3(lv_32fc_t** res
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}
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indexn = _mm_add_ps(indexn, fours);
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}
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for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
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for(unsigned int n = quarterPoints * 4; n < num_points; n++)
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{
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// resample code for current tap
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local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
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@ -153,23 +153,24 @@ static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse3(lv_32fc_t** res
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if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
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_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
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}
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}
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}
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}
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}
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#endif
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#ifdef LV_HAVE_SSE4_1
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#include <smmintrin.h>
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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)
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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_points)
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{
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lv_32fc_t** _result = result;
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const unsigned int quarterPoints = num_output_samples / 4;
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const unsigned int quarterPoints = num_points / 4;
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const __m128 fours = _mm_set1_ps(4.0f);
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const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips);
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const __m128 code_phase_step_chips_reg = _mm_set_ps1(code_phase_step_chips);
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__attribute__((aligned(16))) int local_code_chip_index[4];
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__VOLK_ATTR_ALIGNED(16) int local_code_chip_index[4];
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int local_code_chip_index_;
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const __m128i zeros = _mm_setzero_si128();
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@ -207,7 +208,7 @@ static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse4_1(lv_32fc_t** r
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}
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indexn = _mm_add_ps(indexn, fours);
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}
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for(unsigned int n = quarterPoints * 4; n < num_output_samples; n++)
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for(unsigned int n = quarterPoints * 4; n < num_points; n++)
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{
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// resample code for current tap
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local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
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@ -216,24 +217,24 @@ static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_sse4_1(lv_32fc_t** r
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if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
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_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
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}
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}
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}
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}
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}
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#endif
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#ifdef LV_HAVE_AVX
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#include <immintrin.h>
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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)
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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_points)
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{
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lv_32fc_t** _result = result;
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const unsigned int avx_iters = num_output_samples / 8;
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const unsigned int avx_iters = num_points / 8;
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const __m256 eights = _mm256_set1_ps(8.0f);
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const __m256 rem_code_phase_chips_reg = _mm256_set1_ps(rem_code_phase_chips);
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const __m256 code_phase_step_chips_reg = _mm256_set1_ps(code_phase_step_chips);
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__attribute__((aligned(32))) int local_code_chip_index[8];
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__VOLK_ATTR_ALIGNED(32) int local_code_chip_index[8];
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int local_code_chip_index_;
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const __m256 zeros = _mm256_setzero_ps();
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@ -271,8 +272,8 @@ static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_avx(lv_32fc_t** resu
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}
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indexn = _mm256_add_ps(indexn, eights);
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}
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_mm256_zeroupper();
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for(unsigned int n = avx_iters * 8; n < num_output_samples; n++)
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for(unsigned int n = avx_iters * 8; n < num_points; n++)
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{
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// resample code for current tap
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local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
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@ -281,10 +282,83 @@ static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_a_avx(lv_32fc_t** resu
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if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
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_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
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}
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}
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_mm256_zeroupper();
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}
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}
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}
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#endif
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#endif /*INCLUDED_volk_gnsssdr_16ic_xn_resampler_16ic_xn_H*/
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#ifdef LV_HAVE_NEON
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#include <arm_neon.h>
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static inline void volk_gnsssdr_32fc_xn_resampler_32fc_xn_neon(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_points)
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{
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lv_32fc_t** _result = result;
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const unsigned int neon_iters = num_points / 4;
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const int32x4_t ones = vdupq_n_s32(1);
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const float32x4_t fours = vdupq_n_f32(4.0f);
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const float32x4_t rem_code_phase_chips_reg = vdupq_n_f32(rem_code_phase_chips);
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const float32x4_t code_phase_step_chips_reg = vdupq_n_f32(code_phase_step_chips);
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__VOLK_ATTR_ALIGNED(16) int32_t local_code_chip_index[4];
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int32_t local_code_chip_index_;
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const int32x4_t zeros = vdupq_n_s32(0);
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const float32x4_t code_length_chips_reg_f = vdupq_n_f32((float)code_length_chips);
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const int32x4_t code_length_chips_reg_i = vdupq_n_s32((int32_t)code_length_chips);
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int32x4_t local_code_chip_index_reg, aux_i, negatives, i;
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float32x4_t aux, aux2, shifts_chips_reg, fi, c, j, cTrunc, base, indexn;
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__VOLK_ATTR_ALIGNED(16) const float vec[4] = { 0.0f, 1.0f, 2.0f, 3.0f };
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uint32x4_t igx;
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for (int current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++)
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{
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shifts_chips_reg = vdupq_n_f32((float)shifts_chips[current_correlator_tap]);
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aux2 = vsubq_f32(shifts_chips_reg, rem_code_phase_chips_reg);
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indexn = vld1q_f32((float*)vec);
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for(unsigned int n = 0; n < neon_iters; n++)
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{
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aux = vmulq_f32(code_phase_step_chips_reg, indexn);
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aux = vaddq_f32(aux, aux2);
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// floor
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i = vcvtq_s32_f32(aux);
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fi = vcvtq_f32_s32(i);
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igx = vcgtq_f32(fi, aux);
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j = vcvtq_f32_s32(vandq_s32(vreinterpretq_s32_u32(igx), ones));
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aux = vsubq_f32(fi, j);
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// fmod
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c = vdivq_f32(aux, code_length_chips_reg_f);
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i = vcvtq_s32_f32(c);
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cTrunc = vcvtq_f32_s32(i);
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base = vmulq_f32(cTrunc, code_length_chips_reg_f);
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aux = vsubq_f32(aux, base);
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local_code_chip_index_reg = vcvtq_s32_f32(aux);
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negatives = vreinterpretq_s32_u32(vcltq_s32(local_code_chip_index_reg, zeros));
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aux_i = vandq_s32(code_length_chips_reg_i, negatives);
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local_code_chip_index_reg = vaddq_s32(local_code_chip_index_reg, aux_i);
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vst1q_s32((int32_t*)local_code_chip_index, local_code_chip_index_reg);
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for(unsigned int k = 0; k < 4; ++k)
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{
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_result[current_correlator_tap][n * 4 + k] = local_code[local_code_chip_index[k]];
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}
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indexn = vaddq_f32(indexn, fours);
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}
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for(unsigned int n = neon_iters * 4; n < num_points; n++)
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{
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// resample code for current tap
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local_code_chip_index_ = (int32_t)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips);
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local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
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//Take into account that in multitap correlators, the shifts can be negative!
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if (local_code_chip_index_ < 0) local_code_chip_index_ += code_length_chips;
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_result[current_correlator_tap][n] = local_code[local_code_chip_index_];
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}
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}
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}
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#endif
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#endif /*INCLUDED_volk_gnsssdr_32fc_xn_resampler_32fc_xn_H*/
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