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Add Doppler rate in fast_resampler kernel. Still not used

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Carles Fernandez 2018-08-08 12:03:58 +02:00
parent 33215c89ac
commit 0b5c827eda
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GPG Key ID: 4C583C52B0C3877D
4 changed files with 248 additions and 213 deletions
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121
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_32f_fast_resamplerxnpuppet_32f.h
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@ -49,7 +49,8 @@ static inline void volk_gnsssdr_32f_fast_resamplerxnpuppet_32f_generic(float* re
int code_length_chips = 2046; int code_length_chips = 2046;
float code_phase_step_chips = ((float)(code_length_chips) + 0.1) / ((float)num_points); float code_phase_step_chips = ((float)(code_length_chips) + 0.1) / ((float)num_points);
int num_out_vectors = 3; int num_out_vectors = 3;
float rem_code_phase_chips = -0.234; float rem_code_phase_chips = -0.8234;
float code_phase_rate_step_chips = 1.0 / powf(2.0, 33.0);
unsigned int n; unsigned int n;
float shifts_chips[3] = {-0.1, 0.0, 0.1}; float shifts_chips[3] = {-0.1, 0.0, 0.1};
@ -59,7 +60,7 @@ static inline void volk_gnsssdr_32f_fast_resamplerxnpuppet_32f_generic(float* re
result_aux[n] = (float*)volk_gnsssdr_malloc(sizeof(float) * num_points, volk_gnsssdr_get_alignment()); result_aux[n] = (float*)volk_gnsssdr_malloc(sizeof(float) * num_points, volk_gnsssdr_get_alignment());
} }
volk_gnsssdr_32f_xn_fast_resampler_32f_xn_generic(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points); volk_gnsssdr_32f_xn_fast_resampler_32f_xn_generic(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, code_phase_rate_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
memcpy((float*)result, (float*)result_aux[0], sizeof(float) * num_points); memcpy((float*)result, (float*)result_aux[0], sizeof(float) * num_points);
@ -73,63 +74,65 @@ static inline void volk_gnsssdr_32f_fast_resamplerxnpuppet_32f_generic(float* re
#endif /* LV_HAVE_GENERIC */ #endif /* LV_HAVE_GENERIC */
//#ifdef LV_HAVE_SSE3 #ifdef LV_HAVE_SSE3
//static inline void volk_gnsssdr_32f_resamplerxnpuppet_32f_a_sse3(float* result, const float* local_code, unsigned int num_points) static inline void volk_gnsssdr_32f_fast_resamplerxnpuppet_32f_a_sse3(float* result, const float* local_code, unsigned int num_points)
//{ {
// int code_length_chips = 2046; int code_length_chips = 2046;
// float code_phase_step_chips = ((float)(code_length_chips) + 0.1) / ((float)num_points); float code_phase_step_chips = ((float)(code_length_chips) + 0.1) / ((float)num_points);
// int num_out_vectors = 3; int num_out_vectors = 3;
// float rem_code_phase_chips = -0.234; float rem_code_phase_chips = -0.8234;
// unsigned int n; float code_phase_rate_step_chips = 1.0 / powf(2.0, 33.0);
// float shifts_chips[3] = {-0.1, 0.0, 0.1}; unsigned int n;
// float shifts_chips[3] = {-0.1, 0.0, 0.1};
// float** result_aux = (float**)volk_gnsssdr_malloc(sizeof(float*) * num_out_vectors, volk_gnsssdr_get_alignment());
// for (n = 0; n < num_out_vectors; n++) float** result_aux = (float**)volk_gnsssdr_malloc(sizeof(float*) * num_out_vectors, volk_gnsssdr_get_alignment());
// { for (n = 0; n < num_out_vectors; n++)
// result_aux[n] = (float*)volk_gnsssdr_malloc(sizeof(float) * num_points, volk_gnsssdr_get_alignment()); {
// } result_aux[n] = (float*)volk_gnsssdr_malloc(sizeof(float) * num_points, volk_gnsssdr_get_alignment());
// }
// volk_gnsssdr_32f_xn_resampler_32f_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);
// volk_gnsssdr_32f_xn_fast_resampler_32f_xn_a_sse3(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, code_phase_rate_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
// memcpy((float*)result, (float*)result_aux[0], sizeof(float) * num_points);
// memcpy((float*)result, (float*)result_aux[0], sizeof(float) * num_points);
// for (n = 0; n < num_out_vectors; n++)
// { for (n = 0; n < num_out_vectors; n++)
// volk_gnsssdr_free(result_aux[n]); {
// } volk_gnsssdr_free(result_aux[n]);
// volk_gnsssdr_free(result_aux); }
//} volk_gnsssdr_free(result_aux);
// }
//#endif
// #endif
//#ifdef LV_HAVE_SSE3
//static inline void volk_gnsssdr_32f_resamplerxnpuppet_32f_u_sse3(float* result, const float* local_code, unsigned int num_points) #ifdef LV_HAVE_SSE3
//{ static inline void volk_gnsssdr_32f_fast_resamplerxnpuppet_32f_u_sse3(float* result, const float* local_code, unsigned int num_points)
// int code_length_chips = 2046; {
// float code_phase_step_chips = ((float)(code_length_chips) + 0.1) / ((float)num_points); int code_length_chips = 2046;
// int num_out_vectors = 3; float code_phase_step_chips = ((float)(code_length_chips) + 0.1) / ((float)num_points);
// float rem_code_phase_chips = -0.234; int num_out_vectors = 3;
// unsigned int n; float rem_code_phase_chips = -0.8234;
// float shifts_chips[3] = {-0.1, 0.0, 0.1}; float code_phase_rate_step_chips = 1.0 / powf(2.0, 33.0);
// unsigned int n;
// float** result_aux = (float**)volk_gnsssdr_malloc(sizeof(float*) * num_out_vectors, volk_gnsssdr_get_alignment()); float shifts_chips[3] = {-0.1, 0.0, 0.1};
// for (n = 0; n < num_out_vectors; n++)
// { float** result_aux = (float**)volk_gnsssdr_malloc(sizeof(float*) * num_out_vectors, volk_gnsssdr_get_alignment());
// result_aux[n] = (float*)volk_gnsssdr_malloc(sizeof(float) * num_points, volk_gnsssdr_get_alignment()); for (n = 0; n < num_out_vectors; n++)
// } {
// result_aux[n] = (float*)volk_gnsssdr_malloc(sizeof(float) * num_points, volk_gnsssdr_get_alignment());
// volk_gnsssdr_32f_xn_resampler_32f_xn_u_sse3(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points); }
//
// memcpy((float*)result, (float*)result_aux[0], sizeof(float) * num_points); volk_gnsssdr_32f_xn_fast_resampler_32f_xn_u_sse3(result_aux, local_code, rem_code_phase_chips, code_phase_step_chips, code_phase_rate_step_chips, shifts_chips, code_length_chips, num_out_vectors, num_points);
//
// for (n = 0; n < num_out_vectors; n++) memcpy((float*)result, (float*)result_aux[0], sizeof(float) * num_points);
// {
// volk_gnsssdr_free(result_aux[n]); for (n = 0; n < num_out_vectors; n++)
// } {
// volk_gnsssdr_free(result_aux); volk_gnsssdr_free(result_aux[n]);
//} }
// volk_gnsssdr_free(result_aux);
//#endif }
#endif
// //
// //
//#ifdef LV_HAVE_SSE4_1 //#ifdef LV_HAVE_SSE4_1

335
src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_32f_xn_fast_resampler_32f_xn.h
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@ -46,20 +46,21 @@
* *
* <b>Dispatcher Prototype</b> * <b>Dispatcher Prototype</b>
* \code * \code
* void volk_gnsssdr_32f_xn_fast_resampler_32f_xn(float** result, const float* 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) * void volk_gnsssdr_32f_xn_fast_resampler_32f_xn(float** result, const float* local_code, float rem_code_phase_chips, float code_phase_step_chips, float code_phase_rate_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
* \endcode * \endcode
* *
* \b Inputs * \b Inputs
* \li local_code: Vector to be resampled. * \li local_code: Vector to be resampled.
* \li rem_code_phase_chips: Remnant code phase [chips]. * \li rem_code_phase_chips: Remnant code phase [chips].
* \li code_phase_step_chips: Phase increment per sample [chips/sample]. * \li code_phase_step_chips: Phase increment per sample [chips/sample].
* \li shifts_chips: Vector of floats that defines the spacing (in chips) between the replicas of \p local_code * \li code_phase_rate_step_chips: Phase rate increment per sample [chips/sample^2].
* \li code_length_chips: Code length in chips. * \li shifts_chips: Vector of floats that defines the spacing (in chips) between the replicas of \p local_code
* \li num_out_vectors Number of output vectors. * \li code_length_chips: Code length in chips.
* \li num_points: The number of data values to be in the resampled vector. * \li num_out_vectors Number of output vectors.
* \li num_points: The number of data values to be in the resampled vector.
* *
* \b Outputs * \b Outputs
* \li result: Pointer to a vector of pointers where the results will be stored. * \li result: Pointer to a vector of pointers where the results will be stored.
* *
*/ */
@ -77,7 +78,7 @@
#ifdef LV_HAVE_GENERIC #ifdef LV_HAVE_GENERIC
static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_generic(float** result, const float* 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) static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_generic(float** result, const float* local_code, float rem_code_phase_chips, float code_phase_step_chips, float code_phase_rate_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
{ {
int local_code_chip_index; int local_code_chip_index;
int current_correlator_tap; int current_correlator_tap;
@ -85,9 +86,9 @@ static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_generic(float** res
//first correlator //first correlator
for (n = 0; n < num_points; n++) for (n = 0; n < num_points; n++)
{ {
// resample code for current tap // resample code for first tap
local_code_chip_index = (int)floor(code_phase_step_chips * (float)n + shifts_chips[0] - rem_code_phase_chips); local_code_chip_index = (int)floor(code_phase_step_chips * (float)n + code_phase_rate_step_chips * (float)(n * n) + shifts_chips[0] - rem_code_phase_chips);
//Take into account that in multitap correlators, the shifts can be negative! // Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index < 0) local_code_chip_index += (int)code_length_chips * (abs(local_code_chip_index) / code_length_chips + 1); if (local_code_chip_index < 0) local_code_chip_index += (int)code_length_chips * (abs(local_code_chip_index) / code_length_chips + 1);
local_code_chip_index = local_code_chip_index % code_length_chips; local_code_chip_index = local_code_chip_index % code_length_chips;
result[0][n] = local_code[local_code_chip_index]; result[0][n] = local_code[local_code_chip_index];
@ -106,145 +107,175 @@ static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_generic(float** res
#endif /*LV_HAVE_GENERIC*/ #endif /*LV_HAVE_GENERIC*/
//#ifdef LV_HAVE_SSE3 #ifdef LV_HAVE_SSE3
//#include <pmmintrin.h> #include <pmmintrin.h>
//static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_a_sse3(float** result, const float* 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) static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_a_sse3(float** result, const float* local_code, float rem_code_phase_chips, float code_phase_step_chips, float code_phase_rate_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
//{ {
// float** _result = result; float** _result = result;
// const unsigned int quarterPoints = num_points / 4; const unsigned int quarterPoints = num_points / 4;
// int current_correlator_tap; // int current_correlator_tap;
// unsigned int n; unsigned int n;
// unsigned int k; unsigned int k;
// const __m128 ones = _mm_set1_ps(1.0f); unsigned int current_correlator_tap;
// const __m128 fours = _mm_set1_ps(4.0f); const __m128 ones = _mm_set1_ps(1.0f);
// const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips); const __m128 fours = _mm_set1_ps(4.0f);
// const __m128 code_phase_step_chips_reg = _mm_set_ps1(code_phase_step_chips); 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);
// __VOLK_ATTR_ALIGNED(16) const __m128 code_phase_rate_step_chips_reg = _mm_set_ps1(code_phase_rate_step_chips);
// int local_code_chip_index[4];
// int local_code_chip_index_; __VOLK_ATTR_ALIGNED(16)
// int local_code_chip_index[4];
// const __m128i zeros = _mm_setzero_si128(); int local_code_chip_index_;
// const __m128 code_length_chips_reg_f = _mm_set_ps1((float)code_length_chips); const __m128i zeros = _mm_setzero_si128();
// const __m128i code_length_chips_reg_i = _mm_set1_epi32((int)code_length_chips); const __m128 code_length_chips_reg_f = _mm_set_ps1((float)code_length_chips);
// __m128i local_code_chip_index_reg, aux_i, negatives, i; const __m128i code_length_chips_reg_i = _mm_set1_epi32((int)code_length_chips);
// __m128 aux, aux2, shifts_chips_reg, fi, igx, j, c, cTrunc, base; __m128i local_code_chip_index_reg, aux_i, negatives;
// __m128 aux, aux2, aux3, indexnn, shifts_chips_reg, i, fi, igx, j, c, cTrunc, base;
// for (current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++) __m128 indexn = _mm_set_ps(3.0f, 2.0f, 1.0f, 0.0f);
// {
// shifts_chips_reg = _mm_set_ps1((float)shifts_chips[current_correlator_tap]); shifts_chips_reg = _mm_set_ps1((float)shifts_chips[0]);
// aux2 = _mm_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg); 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 (n = 0; n < quarterPoints; n++) for (n = 0; n < quarterPoints; n++)
// { {
// aux = _mm_mul_ps(code_phase_step_chips_reg, indexn); aux = _mm_mul_ps(code_phase_step_chips_reg, indexn);
// aux = _mm_add_ps(aux, aux2); indexnn = _mm_mul_ps(indexn, indexn);
// // floor aux3 = _mm_mul_ps(code_phase_rate_step_chips_reg, indexnn);
// i = _mm_cvttps_epi32(aux); aux = _mm_add_ps(aux, aux3);
// fi = _mm_cvtepi32_ps(i); aux = _mm_add_ps(aux, aux2);
// igx = _mm_cmpgt_ps(fi, aux); // floor
// j = _mm_and_ps(igx, ones); i = _mm_cvttps_epi32(aux);
// aux = _mm_sub_ps(fi, j); fi = _mm_cvtepi32_ps(i);
// // fmod igx = _mm_cmpgt_ps(fi, aux);
// c = _mm_div_ps(aux, code_length_chips_reg_f); j = _mm_and_ps(igx, ones);
// i = _mm_cvttps_epi32(c); aux = _mm_sub_ps(fi, j);
// cTrunc = _mm_cvtepi32_ps(i);
// base = _mm_mul_ps(cTrunc, code_length_chips_reg_f); // Correct negative shift
// local_code_chip_index_reg = _mm_cvtps_epi32(_mm_sub_ps(aux, base)); c = _mm_div_ps(aux, code_length_chips_reg_f);
// aux3 = _mm_add_ps(c, ones);
// negatives = _mm_cmplt_epi32(local_code_chip_index_reg, zeros); i = _mm_cvttps_epi32(aux3);
// aux_i = _mm_and_si128(code_length_chips_reg_i, negatives); cTrunc = _mm_cvtepi32_ps(i);
// local_code_chip_index_reg = _mm_add_epi32(local_code_chip_index_reg, aux_i); base = _mm_mul_ps(cTrunc, code_length_chips_reg_f);
// _mm_store_si128((__m128i*)local_code_chip_index, local_code_chip_index_reg); local_code_chip_index_reg = _mm_cvtps_epi32(_mm_sub_ps(aux, base));
// for (k = 0; k < 4; ++k) negatives = _mm_cmplt_epi32(local_code_chip_index_reg, zeros);
// { aux_i = _mm_and_si128(code_length_chips_reg_i, negatives);
// _result[current_correlator_tap][n * 4 + k] = local_code[local_code_chip_index[k]]; local_code_chip_index_reg = _mm_add_epi32(local_code_chip_index_reg, aux_i);
// }
// indexn = _mm_add_ps(indexn, fours); _mm_store_si128((__m128i*)local_code_chip_index, local_code_chip_index_reg);
// }
// for (n = quarterPoints * 4; n < num_points; n++) for (k = 0; k < 4; ++k)
// { {
// // resample code for current tap _result[0][n * 4 + k] = local_code[local_code_chip_index[k]];
// local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips); }
// //Take into account that in multitap correlators, the shifts can be negative! indexn = _mm_add_ps(indexn, fours);
// if (local_code_chip_index_ < 0) local_code_chip_index_ += (int)code_length_chips * (abs(local_code_chip_index_) / code_length_chips + 1); }
// local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
// _result[current_correlator_tap][n] = local_code[local_code_chip_index_]; for (n = quarterPoints * 4; n < num_points; n++)
// } {
// } // resample code for first tap
//} local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + code_phase_rate_step_chips * (float)(n * n) + shifts_chips[0] - rem_code_phase_chips);
// // Take into account that in multitap correlators, the shifts can be negative!
//#endif if (local_code_chip_index_ < 0) local_code_chip_index_ += (int)code_length_chips * (abs(local_code_chip_index_) / code_length_chips + 1);
// local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
// _result[0][n] = local_code[local_code_chip_index_];
//#ifdef LV_HAVE_SSE3 }
//#include <pmmintrin.h>
//static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_u_sse3(float** result, const float* 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) // adjacent correlators
//{ unsigned int shift_samples = 0;
// float** _result = result; for (current_correlator_tap = 1; current_correlator_tap < num_out_vectors; current_correlator_tap++)
// const unsigned int quarterPoints = num_points / 4; {
// int current_correlator_tap; shift_samples += (int)round((shifts_chips[current_correlator_tap] - shifts_chips[current_correlator_tap - 1]) / code_phase_step_chips);
// unsigned int n; memcpy(&_result[current_correlator_tap][0], &_result[0][shift_samples], (num_points - shift_samples) * sizeof(float));
// unsigned int k; memcpy(&_result[current_correlator_tap][num_points - shift_samples], &_result[0][0], shift_samples * sizeof(float));
// 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); #endif
// const __m128 code_phase_step_chips_reg = _mm_set_ps1(code_phase_step_chips);
//
// __VOLK_ATTR_ALIGNED(16) #ifdef LV_HAVE_SSE3
// int local_code_chip_index[4]; #include <pmmintrin.h>
// int local_code_chip_index_; static inline void volk_gnsssdr_32f_xn_fast_resampler_32f_xn_u_sse3(float** result, const float* local_code, float rem_code_phase_chips, float code_phase_step_chips, float code_phase_rate_step_chips, float* shifts_chips, unsigned int code_length_chips, int num_out_vectors, unsigned int num_points)
// {
// const __m128i zeros = _mm_setzero_si128(); float** _result = result;
// const __m128 code_length_chips_reg_f = _mm_set_ps1((float)code_length_chips); const unsigned int quarterPoints = num_points / 4;
// const __m128i code_length_chips_reg_i = _mm_set1_epi32((int)code_length_chips); // int current_correlator_tap;
// __m128i local_code_chip_index_reg, aux_i, negatives, i; unsigned int n;
// __m128 aux, aux2, shifts_chips_reg, fi, igx, j, c, cTrunc, base; unsigned int k;
// unsigned int current_correlator_tap;
// for (current_correlator_tap = 0; current_correlator_tap < num_out_vectors; current_correlator_tap++) const __m128 ones = _mm_set1_ps(1.0f);
// { const __m128 fours = _mm_set1_ps(4.0f);
// shifts_chips_reg = _mm_set_ps1((float)shifts_chips[current_correlator_tap]); const __m128 rem_code_phase_chips_reg = _mm_set_ps1(rem_code_phase_chips);
// aux2 = _mm_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg); const __m128 code_phase_step_chips_reg = _mm_set_ps1(code_phase_step_chips);
// __m128 indexn = _mm_set_ps(3.0f, 2.0f, 1.0f, 0.0f); const __m128 code_phase_rate_step_chips_reg = _mm_set_ps1(code_phase_rate_step_chips);
// for (n = 0; n < quarterPoints; n++)
// { __VOLK_ATTR_ALIGNED(16)
// aux = _mm_mul_ps(code_phase_step_chips_reg, indexn); int local_code_chip_index[4];
// aux = _mm_add_ps(aux, aux2); int local_code_chip_index_;
// // floor const __m128i zeros = _mm_setzero_si128();
// i = _mm_cvttps_epi32(aux); const __m128 code_length_chips_reg_f = _mm_set_ps1((float)code_length_chips);
// fi = _mm_cvtepi32_ps(i); const __m128i code_length_chips_reg_i = _mm_set1_epi32((int)code_length_chips);
// igx = _mm_cmpgt_ps(fi, aux); __m128i local_code_chip_index_reg, aux_i, negatives;
// j = _mm_and_ps(igx, ones); __m128 aux, aux2, aux3, indexnn, shifts_chips_reg, i, fi, igx, j, c, cTrunc, base;
// aux = _mm_sub_ps(fi, j); __m128 indexn = _mm_set_ps(3.0f, 2.0f, 1.0f, 0.0f);
// // fmod
// c = _mm_div_ps(aux, code_length_chips_reg_f); shifts_chips_reg = _mm_set_ps1((float)shifts_chips[0]);
// i = _mm_cvttps_epi32(c); aux2 = _mm_sub_ps(shifts_chips_reg, rem_code_phase_chips_reg);
// cTrunc = _mm_cvtepi32_ps(i);
// base = _mm_mul_ps(cTrunc, code_length_chips_reg_f); for (n = 0; n < quarterPoints; n++)
// local_code_chip_index_reg = _mm_cvtps_epi32(_mm_sub_ps(aux, base)); {
// aux = _mm_mul_ps(code_phase_step_chips_reg, indexn);
// negatives = _mm_cmplt_epi32(local_code_chip_index_reg, zeros); indexnn = _mm_mul_ps(indexn, indexn);
// aux_i = _mm_and_si128(code_length_chips_reg_i, negatives); aux3 = _mm_mul_ps(code_phase_rate_step_chips_reg, indexnn);
// local_code_chip_index_reg = _mm_add_epi32(local_code_chip_index_reg, aux_i); aux = _mm_add_ps(aux, aux3);
// _mm_store_si128((__m128i*)local_code_chip_index, local_code_chip_index_reg); aux = _mm_add_ps(aux, aux2);
// for (k = 0; k < 4; ++k) // floor
// { i = _mm_cvttps_epi32(aux);
// _result[current_correlator_tap][n * 4 + k] = local_code[local_code_chip_index[k]]; fi = _mm_cvtepi32_ps(i);
// } igx = _mm_cmpgt_ps(fi, aux);
// indexn = _mm_add_ps(indexn, fours); j = _mm_and_ps(igx, ones);
// } aux = _mm_sub_ps(fi, j);
// for (n = quarterPoints * 4; n < num_points; n++)
// { // Correct negative shift
// // resample code for current tap c = _mm_div_ps(aux, code_length_chips_reg_f);
// local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + shifts_chips[current_correlator_tap] - rem_code_phase_chips); aux3 = _mm_add_ps(c, ones);
// //Take into account that in multitap correlators, the shifts can be negative! i = _mm_cvttps_epi32(aux3);
// if (local_code_chip_index_ < 0) local_code_chip_index_ += (int)code_length_chips * (abs(local_code_chip_index_) / code_length_chips + 1); cTrunc = _mm_cvtepi32_ps(i);
// local_code_chip_index_ = local_code_chip_index_ % code_length_chips; base = _mm_mul_ps(cTrunc, code_length_chips_reg_f);
// _result[current_correlator_tap][n] = local_code[local_code_chip_index_]; 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);
//#endif
_mm_store_si128((__m128i*)local_code_chip_index, local_code_chip_index_reg);
for (k = 0; k < 4; ++k)
{
_result[0][n * 4 + k] = local_code[local_code_chip_index[k]];
}
indexn = _mm_add_ps(indexn, fours);
}
for (n = quarterPoints * 4; n < num_points; n++)
{
// resample code for first tap
local_code_chip_index_ = (int)floor(code_phase_step_chips * (float)n + code_phase_rate_step_chips * (float)(n * n) + shifts_chips[0] - rem_code_phase_chips);
// Take into account that in multitap correlators, the shifts can be negative!
if (local_code_chip_index_ < 0) local_code_chip_index_ += (int)code_length_chips * (abs(local_code_chip_index_) / code_length_chips + 1);
local_code_chip_index_ = local_code_chip_index_ % code_length_chips;
_result[0][n] = local_code[local_code_chip_index_];
}
// adjacent correlators
unsigned int shift_samples = 0;
for (current_correlator_tap = 1; current_correlator_tap < num_out_vectors; current_correlator_tap++)
{
shift_samples += (int)round((shifts_chips[current_correlator_tap] - shifts_chips[current_correlator_tap - 1]) / code_phase_step_chips);
memcpy(&_result[current_correlator_tap][0], &_result[0][shift_samples], (num_points - shift_samples) * sizeof(float));
memcpy(&_result[current_correlator_tap][num_points - shift_samples], &_result[0][0], shift_samples * sizeof(float));
}
}
#endif
// //
// //
//#ifdef LV_HAVE_SSE4_1 //#ifdef LV_HAVE_SSE4_1

3
src/algorithms/tracking/libs/cpu_multicorrelator_real_codes.cc
View File

@ -98,7 +98,7 @@ bool cpu_multicorrelator_real_codes::set_input_output_vectors(std::complex<float
} }
void cpu_multicorrelator_real_codes::update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips) void cpu_multicorrelator_real_codes::update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips, float code_phase_rate_step_chips)
{ {
if (d_use_fast_resampler) if (d_use_fast_resampler)
{ {
@ -106,6 +106,7 @@ void cpu_multicorrelator_real_codes::update_local_code(int correlator_length_sam
d_local_code_in, d_local_code_in,
rem_code_phase_chips, rem_code_phase_chips,
code_phase_step_chips, code_phase_step_chips,
code_phase_rate_step_chips,
d_shifts_chips, d_shifts_chips,
d_code_length_chips, d_code_length_chips,
d_n_correlators, d_n_correlators,

2
src/algorithms/tracking/libs/cpu_multicorrelator_real_codes.h
View File

@ -51,7 +51,7 @@ public:
bool init(int max_signal_length_samples, int n_correlators); bool init(int max_signal_length_samples, int n_correlators);
bool set_local_code_and_taps(int code_length_chips, const float *local_code_in, float *shifts_chips); bool set_local_code_and_taps(int code_length_chips, const float *local_code_in, float *shifts_chips);
bool set_input_output_vectors(std::complex<float> *corr_out, const std::complex<float> *sig_in); bool set_input_output_vectors(std::complex<float> *corr_out, const std::complex<float> *sig_in);
void update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips); void update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips, float code_phase_rate_step_chips = 0.0);
bool Carrier_wipeoff_multicorrelator_resampler(float rem_carrier_phase_in_rad, float phase_step_rad, float rem_code_phase_chips, float code_phase_step_chips, int signal_length_samples); bool Carrier_wipeoff_multicorrelator_resampler(float rem_carrier_phase_in_rad, float phase_step_rad, float rem_code_phase_chips, float code_phase_step_chips, int signal_length_samples);
bool free(); bool free();