mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2024-06-17 02:30:12 +00:00
68fdedb224
Manual usage of _mm256_zeroupper() is not required and leads to miscompilation with GCC 10.2 and optimization level -O3
487 lines
19 KiB
C++
487 lines
19 KiB
C++
/*!
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* \file volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn.h
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* \brief VOLK_GNSSSDR kernel: multiplies N complex (32-bit float per component) vectors
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* by a common vector, phase rotated and accumulates the results in N float complex outputs.
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* \authors <ul>
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* <li> Cillian O'Driscoll 2016. cillian.odriscoll(at)gmail.com
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* </ul>
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*
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* VOLK_GNSSSDR kernel that multiplies N 32 bits complex vectors by a common vector, which is
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* phase-rotated by phase offset and phase increment, and accumulates the results
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* in N 32 bits float complex outputs.
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* It is optimized to perform the N tap correlation process in GNSS receivers.
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*
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* -----------------------------------------------------------------------------
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is part of GNSS-SDR.
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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/*!
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* \page volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn
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*
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* \b Overview
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*
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* Rotates and multiplies the reference complex vector with an arbitrary number of other real vectors,
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* accumulates the results and stores them in the output vector.
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* The rotation is done at a fixed rate per sample, from an initial \p phase offset.
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* This function can be used for Doppler wipe-off and multiple correlator.
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*
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* <b>Dispatcher Prototype</b>
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* \code
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* void volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn(lv_32fc_t* result, const lv_32fc_t* in_common, const lv_32fc_t phase_inc, lv_32fc_t* phase, const float** in_a, int num_a_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 in_common: Pointer to one of the vectors to be rotated, multiplied and accumulated (reference vector).
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* \li phase_inc: Phase increment = lv_cmake(cos(phase_step_rad), sin(phase_step_rad))
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* \li phase: Initial phase = lv_cmake(cos(initial_phase_rad), sin(initial_phase_rad))
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* \li in_a: Pointer to an array of pointers to multiple vectors to be multiplied and accumulated.
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* \li num_a_vectors: Number of vectors to be multiplied by the reference vector and accumulated.
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* \li num_points: Number of complex values to be multiplied together, accumulated and stored into \p result.
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*
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* \b Outputs
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* \li phase: Final phase.
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* \li result: Vector of \p num_a_vectors components with the multiple vectors of \p in_a rotated, multiplied by \p in_common and accumulated.
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*
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*/
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#ifndef INCLUDED_volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_H
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#define INCLUDED_volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_H
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#include <volk_gnsssdr/saturation_arithmetic.h>
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#include <volk_gnsssdr/volk_gnsssdr.h>
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#include <volk_gnsssdr/volk_gnsssdr_malloc.h>
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#include <math.h>
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#ifdef LV_HAVE_GENERIC
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static inline void volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_generic(lv_32fc_t* result, const lv_32fc_t* in_common, const lv_32fc_t phase_inc, lv_32fc_t* phase, const float** in_a, int num_a_vectors, unsigned int num_points)
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{
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lv_32fc_t tmp32_1, tmp32_2;
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int n_vec;
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unsigned int n;
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for (n_vec = 0; n_vec < num_a_vectors; n_vec++)
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{
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result[n_vec] = lv_cmake(0.0f, 0.0f);
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}
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for (n = 0; n < num_points; n++)
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{
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tmp32_1 = *in_common++ * (*phase); // if(n<10 || n >= 8108) printf("generic phase %i: %f,%f\n", n,lv_creal(*phase),lv_cimag(*phase));
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// Regenerate phase
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if (n % 256 == 0)
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{
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// printf("Phase before regeneration %i: %f,%f Modulus: %f\n", n,lv_creal(*phase),lv_cimag(*phase), cabsf(*phase));
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#ifdef __cplusplus
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(*phase) /= std::abs((*phase));
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#else
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(*phase) /= hypotf(lv_creal(*phase), lv_cimag(*phase));
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#endif
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// printf("Phase after regeneration %i: %f,%f Modulus: %f\n", n,lv_creal(*phase),lv_cimag(*phase), cabsf(*phase));
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}
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(*phase) *= phase_inc;
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for (n_vec = 0; n_vec < num_a_vectors; n_vec++)
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{
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tmp32_2 = tmp32_1 * in_a[n_vec][n];
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result[n_vec] += tmp32_2;
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}
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}
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}
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#endif /* LV_HAVE_GENERIC */
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#ifdef LV_HAVE_GENERIC
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static inline void volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_generic_reload(lv_32fc_t* result, const lv_32fc_t* in_common, const lv_32fc_t phase_inc, lv_32fc_t* phase, const float** in_a, int num_a_vectors, unsigned int num_points)
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{
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lv_32fc_t tmp32_1, tmp32_2;
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const unsigned int ROTATOR_RELOAD = 256;
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int n_vec;
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unsigned int n;
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unsigned int j;
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for (n_vec = 0; n_vec < num_a_vectors; n_vec++)
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{
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result[n_vec] = lv_cmake(0.0f, 0.0f);
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}
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for (n = 0; n < num_points / ROTATOR_RELOAD; n++)
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{
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for (j = 0; j < ROTATOR_RELOAD; j++)
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{
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tmp32_1 = *in_common++ * (*phase);
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(*phase) *= phase_inc;
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for (n_vec = 0; n_vec < num_a_vectors; n_vec++)
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{
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tmp32_2 = tmp32_1 * in_a[n_vec][n * ROTATOR_RELOAD + j];
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result[n_vec] += tmp32_2;
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}
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}
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/* Regenerate phase */
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#ifdef __cplusplus
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(*phase) /= std::abs((*phase));
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#else
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// (*phase) /= cabsf((*phase));
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(*phase) /= hypotf(lv_creal(*phase), lv_cimag(*phase));
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#endif
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}
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for (j = 0; j < num_points % ROTATOR_RELOAD; j++)
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{
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tmp32_1 = *in_common++ * (*phase);
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(*phase) *= phase_inc;
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for (n_vec = 0; n_vec < num_a_vectors; n_vec++)
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{
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tmp32_2 = tmp32_1 * in_a[n_vec][(num_points / ROTATOR_RELOAD) * ROTATOR_RELOAD + j];
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result[n_vec] += tmp32_2;
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}
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}
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}
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#endif /* LV_HAVE_GENERIC */
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#ifdef LV_HAVE_AVX
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#include <volk_gnsssdr/volk_gnsssdr_avx_intrinsics.h>
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#include <immintrin.h>
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static inline void volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_u_avx(lv_32fc_t* result, const lv_32fc_t* in_common, const lv_32fc_t phase_inc, lv_32fc_t* phase, const float** in_a, int num_a_vectors, unsigned int num_points)
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{
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#ifndef WIN32
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unsigned int number = 0;
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int vec_ind = 0;
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unsigned int i = 0;
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const unsigned int sixteenthPoints = num_points / 16;
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const float* aPtr = (float*)in_common;
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const float* bPtr[num_a_vectors];
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for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
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{
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bPtr[vec_ind] = in_a[vec_ind];
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}
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lv_32fc_t _phase = (*phase);
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lv_32fc_t wo;
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__m256 a0Val, a1Val, a2Val, a3Val;
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__m256 b0Val[num_a_vectors], b1Val[num_a_vectors], b2Val[num_a_vectors], b3Val[num_a_vectors];
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__m256 x0Val[num_a_vectors], x1Val[num_a_vectors], x0loVal[num_a_vectors], x0hiVal[num_a_vectors], x1loVal[num_a_vectors], x1hiVal[num_a_vectors];
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__m256 c0Val[num_a_vectors], c1Val[num_a_vectors], c2Val[num_a_vectors], c3Val[num_a_vectors];
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__m256 dotProdVal0[num_a_vectors];
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__m256 dotProdVal1[num_a_vectors];
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__m256 dotProdVal2[num_a_vectors];
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__m256 dotProdVal3[num_a_vectors];
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for (vec_ind = 0; vec_ind < num_a_vectors; vec_ind++)
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{
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dotProdVal0[vec_ind] = _mm256_setzero_ps();
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dotProdVal1[vec_ind] = _mm256_setzero_ps();
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dotProdVal2[vec_ind] = _mm256_setzero_ps();
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dotProdVal3[vec_ind] = _mm256_setzero_ps();
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}
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// Set up the complex rotator
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__m256 z0, z1, z2, z3;
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__VOLK_ATTR_ALIGNED(32)
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lv_32fc_t phase_vec[16];
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for (vec_ind = 0; vec_ind < 16; ++vec_ind)
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{
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phase_vec[vec_ind] = _phase;
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_phase *= phase_inc;
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}
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z0 = _mm256_load_ps((float*)phase_vec);
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z1 = _mm256_load_ps((float*)(phase_vec + 4));
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z2 = _mm256_load_ps((float*)(phase_vec + 8));
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z3 = _mm256_load_ps((float*)(phase_vec + 12));
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lv_32fc_t dz = phase_inc;
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dz *= dz;
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dz *= dz;
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dz *= dz;
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dz *= dz; // dz = phase_inc^16;
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for (vec_ind = 0; vec_ind < 4; ++vec_ind)
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{
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phase_vec[vec_ind] = dz;
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}
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__m256 dz_reg = _mm256_load_ps((float*)phase_vec);
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dz_reg = _mm256_complexnormalise_ps(dz_reg);
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for (; number < sixteenthPoints; number++)
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{
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a0Val = _mm256_loadu_ps(aPtr);
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a1Val = _mm256_loadu_ps(aPtr + 8);
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a2Val = _mm256_loadu_ps(aPtr + 16);
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a3Val = _mm256_loadu_ps(aPtr + 24);
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a0Val = _mm256_complexmul_ps(a0Val, z0);
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a1Val = _mm256_complexmul_ps(a1Val, z1);
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a2Val = _mm256_complexmul_ps(a2Val, z2);
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a3Val = _mm256_complexmul_ps(a3Val, z3);
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z0 = _mm256_complexmul_ps(z0, dz_reg);
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z1 = _mm256_complexmul_ps(z1, dz_reg);
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z2 = _mm256_complexmul_ps(z2, dz_reg);
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z3 = _mm256_complexmul_ps(z3, dz_reg);
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for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
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{
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x0Val[vec_ind] = _mm256_loadu_ps(bPtr[vec_ind]); // t0|t1|t2|t3|t4|t5|t6|t7
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x1Val[vec_ind] = _mm256_loadu_ps(bPtr[vec_ind] + 8);
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x0loVal[vec_ind] = _mm256_unpacklo_ps(x0Val[vec_ind], x0Val[vec_ind]); // t0|t0|t1|t1|t4|t4|t5|t5
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x0hiVal[vec_ind] = _mm256_unpackhi_ps(x0Val[vec_ind], x0Val[vec_ind]); // t2|t2|t3|t3|t6|t6|t7|t7
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x1loVal[vec_ind] = _mm256_unpacklo_ps(x1Val[vec_ind], x1Val[vec_ind]);
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x1hiVal[vec_ind] = _mm256_unpackhi_ps(x1Val[vec_ind], x1Val[vec_ind]);
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// TODO: it may be possible to rearrange swizzling to better pipeline data
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b0Val[vec_ind] = _mm256_permute2f128_ps(x0loVal[vec_ind], x0hiVal[vec_ind], 0x20); // t0|t0|t1|t1|t2|t2|t3|t3
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b1Val[vec_ind] = _mm256_permute2f128_ps(x0loVal[vec_ind], x0hiVal[vec_ind], 0x31); // t4|t4|t5|t5|t6|t6|t7|t7
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b2Val[vec_ind] = _mm256_permute2f128_ps(x1loVal[vec_ind], x1hiVal[vec_ind], 0x20);
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b3Val[vec_ind] = _mm256_permute2f128_ps(x1loVal[vec_ind], x1hiVal[vec_ind], 0x31);
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c0Val[vec_ind] = _mm256_mul_ps(a0Val, b0Val[vec_ind]);
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c1Val[vec_ind] = _mm256_mul_ps(a1Val, b1Val[vec_ind]);
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c2Val[vec_ind] = _mm256_mul_ps(a2Val, b2Val[vec_ind]);
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c3Val[vec_ind] = _mm256_mul_ps(a3Val, b3Val[vec_ind]);
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dotProdVal0[vec_ind] = _mm256_add_ps(c0Val[vec_ind], dotProdVal0[vec_ind]);
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dotProdVal1[vec_ind] = _mm256_add_ps(c1Val[vec_ind], dotProdVal1[vec_ind]);
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dotProdVal2[vec_ind] = _mm256_add_ps(c2Val[vec_ind], dotProdVal2[vec_ind]);
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dotProdVal3[vec_ind] = _mm256_add_ps(c3Val[vec_ind], dotProdVal3[vec_ind]);
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bPtr[vec_ind] += 16;
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}
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// Force the rotators back onto the unit circle
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if ((number % 64) == 0)
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{
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z0 = _mm256_complexnormalise_ps(z0);
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z1 = _mm256_complexnormalise_ps(z1);
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z2 = _mm256_complexnormalise_ps(z2);
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z3 = _mm256_complexnormalise_ps(z3);
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}
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aPtr += 32;
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}
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__VOLK_ATTR_ALIGNED(32)
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lv_32fc_t dotProductVector[4];
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for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
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{
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dotProdVal0[vec_ind] = _mm256_add_ps(dotProdVal0[vec_ind], dotProdVal1[vec_ind]);
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dotProdVal0[vec_ind] = _mm256_add_ps(dotProdVal0[vec_ind], dotProdVal2[vec_ind]);
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dotProdVal0[vec_ind] = _mm256_add_ps(dotProdVal0[vec_ind], dotProdVal3[vec_ind]);
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_mm256_store_ps((float*)dotProductVector, dotProdVal0[vec_ind]); // Store the results back into the dot product vector
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result[vec_ind] = lv_cmake(0.0f, 0.0f);
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for (i = 0; i < 4; ++i)
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{
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result[vec_ind] += dotProductVector[i];
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}
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}
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z0 = _mm256_complexnormalise_ps(z0);
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_mm256_store_ps((float*)phase_vec, z0);
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_phase = phase_vec[0];
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number = sixteenthPoints * 16;
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for (; number < num_points; number++)
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{
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wo = in_common[number] * _phase;
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_phase *= phase_inc;
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for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
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{
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result[vec_ind] += wo * in_a[vec_ind][number];
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}
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}
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*phase = _phase;
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#else
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volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_generic_reload(result, in_common, phase_inc, phase, in_a, num_a_vectors, num_points);
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#endif
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}
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#endif /* LV_HAVE_AVX */
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#ifdef LV_HAVE_AVX
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#include <volk_gnsssdr/volk_gnsssdr_avx_intrinsics.h>
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#include <immintrin.h>
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static inline void volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_a_avx(lv_32fc_t* result, const lv_32fc_t* in_common, const lv_32fc_t phase_inc, lv_32fc_t* phase, const float** in_a, int num_a_vectors, unsigned int num_points)
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{
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#ifndef WIN32
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unsigned int number = 0;
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int vec_ind = 0;
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unsigned int i = 0;
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const unsigned int sixteenthPoints = num_points / 16;
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const float* aPtr = (float*)in_common;
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const float* bPtr[num_a_vectors];
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for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
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{
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bPtr[vec_ind] = in_a[vec_ind];
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}
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lv_32fc_t _phase = (*phase);
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lv_32fc_t wo;
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__m256 a0Val, a1Val, a2Val, a3Val;
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__m256 b0Val[num_a_vectors], b1Val[num_a_vectors], b2Val[num_a_vectors], b3Val[num_a_vectors];
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__m256 x0Val[num_a_vectors], x1Val[num_a_vectors], x0loVal[num_a_vectors], x0hiVal[num_a_vectors], x1loVal[num_a_vectors], x1hiVal[num_a_vectors];
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__m256 c0Val[num_a_vectors], c1Val[num_a_vectors], c2Val[num_a_vectors], c3Val[num_a_vectors];
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__m256 dotProdVal0[num_a_vectors];
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__m256 dotProdVal1[num_a_vectors];
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__m256 dotProdVal2[num_a_vectors];
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__m256 dotProdVal3[num_a_vectors];
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for (vec_ind = 0; vec_ind < num_a_vectors; vec_ind++)
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{
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dotProdVal0[vec_ind] = _mm256_setzero_ps();
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dotProdVal1[vec_ind] = _mm256_setzero_ps();
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dotProdVal2[vec_ind] = _mm256_setzero_ps();
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dotProdVal3[vec_ind] = _mm256_setzero_ps();
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}
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// Set up the complex rotator
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__m256 z0, z1, z2, z3;
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__VOLK_ATTR_ALIGNED(32)
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lv_32fc_t phase_vec[16];
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for (vec_ind = 0; vec_ind < 16; ++vec_ind)
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{
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phase_vec[vec_ind] = _phase;
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_phase *= phase_inc;
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}
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z0 = _mm256_load_ps((float*)phase_vec);
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z1 = _mm256_load_ps((float*)(phase_vec + 4));
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z2 = _mm256_load_ps((float*)(phase_vec + 8));
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z3 = _mm256_load_ps((float*)(phase_vec + 12));
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lv_32fc_t dz = phase_inc;
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dz *= dz;
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dz *= dz;
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dz *= dz;
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dz *= dz; // dz = phase_inc^16;
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for (vec_ind = 0; vec_ind < 4; ++vec_ind)
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{
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phase_vec[vec_ind] = dz;
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}
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__m256 dz_reg = _mm256_load_ps((float*)phase_vec);
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dz_reg = _mm256_complexnormalise_ps(dz_reg);
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for (; number < sixteenthPoints; number++)
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{
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a0Val = _mm256_load_ps(aPtr);
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a1Val = _mm256_load_ps(aPtr + 8);
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a2Val = _mm256_load_ps(aPtr + 16);
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a3Val = _mm256_load_ps(aPtr + 24);
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a0Val = _mm256_complexmul_ps(a0Val, z0);
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a1Val = _mm256_complexmul_ps(a1Val, z1);
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a2Val = _mm256_complexmul_ps(a2Val, z2);
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a3Val = _mm256_complexmul_ps(a3Val, z3);
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z0 = _mm256_complexmul_ps(z0, dz_reg);
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z1 = _mm256_complexmul_ps(z1, dz_reg);
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z2 = _mm256_complexmul_ps(z2, dz_reg);
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z3 = _mm256_complexmul_ps(z3, dz_reg);
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for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
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{
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x0Val[vec_ind] = _mm256_loadu_ps(bPtr[vec_ind]); // t0|t1|t2|t3|t4|t5|t6|t7
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x1Val[vec_ind] = _mm256_loadu_ps(bPtr[vec_ind] + 8);
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x0loVal[vec_ind] = _mm256_unpacklo_ps(x0Val[vec_ind], x0Val[vec_ind]); // t0|t0|t1|t1|t4|t4|t5|t5
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x0hiVal[vec_ind] = _mm256_unpackhi_ps(x0Val[vec_ind], x0Val[vec_ind]); // t2|t2|t3|t3|t6|t6|t7|t7
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x1loVal[vec_ind] = _mm256_unpacklo_ps(x1Val[vec_ind], x1Val[vec_ind]);
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x1hiVal[vec_ind] = _mm256_unpackhi_ps(x1Val[vec_ind], x1Val[vec_ind]);
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|
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// TODO: it may be possible to rearrange swizzling to better pipeline data
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b0Val[vec_ind] = _mm256_permute2f128_ps(x0loVal[vec_ind], x0hiVal[vec_ind], 0x20); // t0|t0|t1|t1|t2|t2|t3|t3
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b1Val[vec_ind] = _mm256_permute2f128_ps(x0loVal[vec_ind], x0hiVal[vec_ind], 0x31); // t4|t4|t5|t5|t6|t6|t7|t7
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b2Val[vec_ind] = _mm256_permute2f128_ps(x1loVal[vec_ind], x1hiVal[vec_ind], 0x20);
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b3Val[vec_ind] = _mm256_permute2f128_ps(x1loVal[vec_ind], x1hiVal[vec_ind], 0x31);
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|
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c0Val[vec_ind] = _mm256_mul_ps(a0Val, b0Val[vec_ind]);
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c1Val[vec_ind] = _mm256_mul_ps(a1Val, b1Val[vec_ind]);
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c2Val[vec_ind] = _mm256_mul_ps(a2Val, b2Val[vec_ind]);
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c3Val[vec_ind] = _mm256_mul_ps(a3Val, b3Val[vec_ind]);
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|
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dotProdVal0[vec_ind] = _mm256_add_ps(c0Val[vec_ind], dotProdVal0[vec_ind]);
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dotProdVal1[vec_ind] = _mm256_add_ps(c1Val[vec_ind], dotProdVal1[vec_ind]);
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dotProdVal2[vec_ind] = _mm256_add_ps(c2Val[vec_ind], dotProdVal2[vec_ind]);
|
|
dotProdVal3[vec_ind] = _mm256_add_ps(c3Val[vec_ind], dotProdVal3[vec_ind]);
|
|
|
|
bPtr[vec_ind] += 16;
|
|
}
|
|
|
|
// Force the rotators back onto the unit circle
|
|
if ((number % 64) == 0)
|
|
{
|
|
z0 = _mm256_complexnormalise_ps(z0);
|
|
z1 = _mm256_complexnormalise_ps(z1);
|
|
z2 = _mm256_complexnormalise_ps(z2);
|
|
z3 = _mm256_complexnormalise_ps(z3);
|
|
}
|
|
|
|
aPtr += 32;
|
|
}
|
|
__VOLK_ATTR_ALIGNED(32)
|
|
lv_32fc_t dotProductVector[4];
|
|
|
|
for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
|
|
{
|
|
dotProdVal0[vec_ind] = _mm256_add_ps(dotProdVal0[vec_ind], dotProdVal1[vec_ind]);
|
|
dotProdVal0[vec_ind] = _mm256_add_ps(dotProdVal0[vec_ind], dotProdVal2[vec_ind]);
|
|
dotProdVal0[vec_ind] = _mm256_add_ps(dotProdVal0[vec_ind], dotProdVal3[vec_ind]);
|
|
|
|
_mm256_store_ps((float*)dotProductVector, dotProdVal0[vec_ind]); // Store the results back into the dot product vector
|
|
|
|
result[vec_ind] = lv_cmake(0.0f, 0.0f);
|
|
for (i = 0; i < 4; ++i)
|
|
{
|
|
result[vec_ind] += dotProductVector[i];
|
|
}
|
|
}
|
|
|
|
z0 = _mm256_complexnormalise_ps(z0);
|
|
_mm256_store_ps((float*)phase_vec, z0);
|
|
_phase = phase_vec[0];
|
|
|
|
number = sixteenthPoints * 16;
|
|
for (; number < num_points; number++)
|
|
{
|
|
wo = in_common[number] * _phase;
|
|
_phase *= phase_inc;
|
|
|
|
for (vec_ind = 0; vec_ind < num_a_vectors; ++vec_ind)
|
|
{
|
|
result[vec_ind] += wo * in_a[vec_ind][number];
|
|
}
|
|
}
|
|
|
|
*phase = _phase;
|
|
#else
|
|
volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_generic_reload(result, in_common, phase_inc, phase, in_a, num_a_vectors, num_points);
|
|
#endif
|
|
}
|
|
|
|
|
|
#endif /* LV_HAVE_AVX */
|
|
|
|
#endif /* INCLUDED_volk_gnsssdr_32fc_32f_rotator_dot_prod_32fc_xn_H */
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