mirror of https://github.com/gnss-sdr/gnss-sdr
190 lines
5.0 KiB
C
190 lines
5.0 KiB
C
/*!
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* \file volk_gnsssdr_16ic_conjugate_16ic.h
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* \brief VOLK_GNSSSDR kernel: returns the conjugate of a 16 bits complex vector.
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* \authors <ul>
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* <li> Carles Fernandez Prades 2017 cfernandez at cttc dot cat
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* </ul>
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*
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* VOLK_GNSSSDR kernel that calculates the conjugate of a
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* 16 bits complex vector (16 bits the real part and 16 bits the imaginary part)
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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_16ic_conjugate_16ic
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*
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* \b Overview
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*
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* Takes the conjugate of a complex signed 16-bit integer vector.
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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_conjugate_16ic(lv_16sc_t* cVector, const lv_16sc_t* aVector, unsigned int num_points);
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* \endcode
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*
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* \b Inputs
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* \li aVector: Vector of complex items to be conjugated
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* \li num_points: The number of complex data points.
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*
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* \b Outputs
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* \li cVector: The vector where the result will be stored
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*
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*/
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#ifndef INCLUDED_volk_gnsssdr_16ic_conjugate_16ic_H
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#define INCLUDED_volk_gnsssdr_16ic_conjugate_16ic_H
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#ifdef LV_HAVE_GENERIC
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static inline void volk_gnsssdr_16ic_conjugate_16ic_generic(lv_16sc_t* cVector, const lv_16sc_t* aVector, unsigned int num_points)
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{
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lv_16sc_t* cPtr = cVector;
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const lv_16sc_t* aPtr = aVector;
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unsigned int number;
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for (number = 0; number < num_points; number++)
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{
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*cPtr++ = lv_conj(*aPtr++);
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}
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}
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#endif /* LV_HAVE_GENERIC */
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#ifdef LV_HAVE_SSSE3
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#include <tmmintrin.h>
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static inline void volk_gnsssdr_16ic_conjugate_16ic_u_ssse3(lv_16sc_t* cVector, const lv_16sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 4;
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unsigned int i;
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lv_16sc_t* c = cVector;
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const lv_16sc_t* a = aVector;
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__m128i tmp;
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__m128i conjugator = _mm_setr_epi16(1, -1, 1, -1, 1, -1, 1, -1);
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for (i = 0; i < sse_iters; ++i)
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{
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tmp = _mm_lddqu_si128((__m128i*)a);
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tmp = _mm_sign_epi16(tmp, conjugator);
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_mm_storeu_si128((__m128i*)c, tmp);
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a += 4;
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c += 4;
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}
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for (i = sse_iters * 4; i < num_points; ++i)
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{
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*c++ = lv_conj(*a++);
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}
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}
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#endif /* LV_HAVE_SSSE3 */
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#ifdef LV_HAVE_SSSE3
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#include <tmmintrin.h>
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static inline void volk_gnsssdr_16ic_conjugate_16ic_a_ssse3(lv_16sc_t* cVector, const lv_16sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 4;
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unsigned int i;
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lv_16sc_t* c = cVector;
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const lv_16sc_t* a = aVector;
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__m128i tmp;
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__m128i conjugator = _mm_setr_epi16(1, -1, 1, -1, 1, -1, 1, -1);
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for (i = 0; i < sse_iters; ++i)
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{
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tmp = _mm_load_si128((__m128i*)a);
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tmp = _mm_sign_epi16(tmp, conjugator);
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_mm_store_si128((__m128i*)c, tmp);
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a += 4;
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c += 4;
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}
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for (i = sse_iters * 4; i < num_points; ++i)
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{
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*c++ = lv_conj(*a++);
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}
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}
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#endif /* LV_HAVE_SSSE3 */
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#ifdef LV_HAVE_AVX2
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#include <immintrin.h>
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static inline void volk_gnsssdr_16ic_conjugate_16ic_a_avx2(lv_16sc_t* cVector, const lv_16sc_t* aVector, unsigned int num_points)
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{
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const unsigned int avx2_iters = num_points / 8;
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unsigned int i;
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lv_16sc_t* c = cVector;
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const lv_16sc_t* a = aVector;
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__m256i tmp;
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__m256i conjugator = _mm256_setr_epi16(1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1);
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for (i = 0; i < avx2_iters; ++i)
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{
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tmp = _mm256_load_si256((__m256i*)a);
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tmp = _mm256_sign_epi16(tmp, conjugator);
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_mm256_store_si256((__m256i*)c, tmp);
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a += 8;
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c += 8;
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}
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for (i = avx2_iters * 8; i < num_points; ++i)
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{
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*c++ = lv_conj(*a++);
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}
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}
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#endif /* LV_HAVE_AVX2 */
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#ifdef LV_HAVE_AVX2
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#include <immintrin.h>
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static inline void volk_gnsssdr_16ic_conjugate_16ic_u_avx2(lv_16sc_t* cVector, const lv_16sc_t* aVector, unsigned int num_points)
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{
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const unsigned int avx2_iters = num_points / 8;
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unsigned int i;
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lv_16sc_t* c = cVector;
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const lv_16sc_t* a = aVector;
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__m256i tmp;
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__m256i conjugator = _mm256_setr_epi16(1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1);
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for (i = 0; i < avx2_iters; ++i)
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{
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tmp = _mm256_loadu_si256((__m256i*)a);
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tmp = _mm256_sign_epi16(tmp, conjugator);
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_mm256_storeu_si256((__m256i*)c, tmp);
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a += 8;
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c += 8;
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}
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for (i = avx2_iters * 8; i < num_points; ++i)
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{
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*c++ = lv_conj(*a++);
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}
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}
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#endif /* LV_HAVE_AVX2 */
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#endif /* INCLUDED_volk_gnsssdr_16ic_conjugate_16ic_H */
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