mirror of https://github.com/gnss-sdr/gnss-sdr
323 lines
9.8 KiB
C
323 lines
9.8 KiB
C
/*!
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* \file volk_gnsssdr_8ic_conjugate_8ic.h
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* \brief VOLK_GNSSSDR kernel: calculates the conjugate of a 16 bits vector.
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* \authors <ul>
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* <li> Andres Cecilia, 2014. a.cecilia.luque(at)gmail.com
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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 vector (8 bits the real part and 8 bits the imaginary part)
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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/*!
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* \page volk_gnsssdr_8ic_conjugate_8ic
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*
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* \b Overview
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*
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* Takes the conjugate of a complex unsigned char 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_8ic_conjugate_8ic(lv_8sc_t* cVector, const lv_8sc_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_8ic_conjugate_8ic_H
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#define INCLUDED_volk_gnsssdr_8ic_conjugate_8ic_H
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#ifdef LV_HAVE_AVX
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#include <immintrin.h>
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static inline void volk_gnsssdr_8ic_conjugate_8ic_u_avx(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 16;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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__m256 tmp;
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__m128i tmp128lo, tmp128hi;
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__m256 conjugator1 = _mm256_castsi256_ps(_mm256_setr_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255));
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__m128i conjugator2 = _mm_setr_epi8(0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1);
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for (unsigned int i = 0; i < sse_iters; ++i)
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{
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tmp = _mm256_loadu_ps((float*)a);
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tmp = _mm256_xor_ps(tmp, conjugator1);
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tmp128lo = _mm256_castsi256_si128(_mm256_castps_si256(tmp));
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tmp128lo = _mm_add_epi8(tmp128lo, conjugator2);
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tmp128hi = _mm256_extractf128_si256(_mm256_castps_si256(tmp),1);
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tmp128hi = _mm_add_epi8(tmp128hi, conjugator2);
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//tmp = _mm256_set_m128i(tmp128hi , tmp128lo); //not defined in some versions of immintrin.h
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tmp = _mm256_castsi256_ps(_mm256_insertf128_si256(_mm256_castsi128_si256(tmp128lo),(tmp128hi),1));
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_mm256_storeu_ps((float*)c, tmp);
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a += 16;
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c += 16;
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}
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for (unsigned int i = sse_iters * 16; 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_AVX */
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#ifdef LV_HAVE_SSSE3
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#include <tmmintrin.h>
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static inline void volk_gnsssdr_8ic_conjugate_8ic_u_ssse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 8;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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__m128i tmp;
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__m128i conjugator = _mm_setr_epi8(1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1);
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for (unsigned int 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_epi8(tmp, conjugator);
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_mm_storeu_si128((__m128i*)c, tmp);
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a += 8;
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c += 8;
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}
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for (unsigned int i = sse_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_SSSE3 */
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#ifdef LV_HAVE_SSE3
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#include <pmmintrin.h>
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static inline void volk_gnsssdr_8ic_conjugate_8ic_u_sse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 8;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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__m128i tmp;
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__m128i conjugator1 = _mm_setr_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
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__m128i conjugator2 = _mm_setr_epi8(0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1);
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for (unsigned int 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_xor_si128(tmp, conjugator1);
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tmp = _mm_add_epi8(tmp, conjugator2);
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_mm_storeu_si128((__m128i*)c, tmp);
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a += 8;
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c += 8;
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}
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for (unsigned int i = sse_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_SSE3 */
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#ifdef LV_HAVE_GENERIC
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static inline void volk_gnsssdr_8ic_conjugate_8ic_generic(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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lv_8sc_t* cPtr = cVector;
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const lv_8sc_t* aPtr = aVector;
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unsigned int number = 0;
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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_AVX
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#include <immintrin.h>
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static inline void volk_gnsssdr_8ic_conjugate_8ic_a_avx(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 16;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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__m256 tmp;
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__m128i tmp128lo, tmp128hi;
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__m256 conjugator1 = _mm256_castsi256_ps(_mm256_setr_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255));
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__m128i conjugator2 = _mm_setr_epi8(0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1);
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for (unsigned int i = 0; i < sse_iters; ++i)
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{
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tmp = _mm256_load_ps((float*)a);
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tmp = _mm256_xor_ps(tmp, conjugator1);
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tmp128lo = _mm256_castsi256_si128(_mm256_castps_si256(tmp));
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tmp128lo = _mm_add_epi8(tmp128lo, conjugator2);
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tmp128hi = _mm256_extractf128_si256(_mm256_castps_si256(tmp),1);
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tmp128hi = _mm_add_epi8(tmp128hi, conjugator2);
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//tmp = _mm256_set_m128i(tmp128hi , tmp128lo); //not defined in some versions of immintrin.h
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tmp = _mm256_castsi256_ps(_mm256_insertf128_si256(_mm256_castsi128_si256(tmp128lo),(tmp128hi),1));
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_mm256_store_ps((float*)c, tmp);
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a += 16;
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c += 16;
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}
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for (unsigned int i = sse_iters * 16; 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_AVX */
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#ifdef LV_HAVE_SSSE3
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#include <tmmintrin.h>
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static inline void volk_gnsssdr_8ic_conjugate_8ic_a_ssse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 8;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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__m128i tmp;
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__m128i conjugator = _mm_setr_epi8(1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1);
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for (unsigned int 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_epi8(tmp, conjugator);
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_mm_store_si128((__m128i*)c, tmp);
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a += 8;
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c += 8;
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}
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for (unsigned int i = sse_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_SSSE3 */
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#ifdef LV_HAVE_SSE3
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#include <pmmintrin.h>
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static inline void volk_gnsssdr_8ic_conjugate_8ic_a_sse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 8;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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__m128i tmp;
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__m128i conjugator1 = _mm_setr_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
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__m128i conjugator2 = _mm_setr_epi8(0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1);
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for (unsigned int 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_xor_si128(tmp, conjugator1);
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tmp = _mm_add_epi8(tmp, conjugator2);
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_mm_store_si128((__m128i*)c, tmp);
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a += 8;
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c += 8;
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}
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for (unsigned int i = sse_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_SSE3 */
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#ifdef LV_HAVE_ORC
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extern void volk_gnsssdr_8ic_conjugate_8ic_a_orc_impl(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points);
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static inline void volk_gnsssdr_8ic_conjugate_8ic_u_orc(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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volk_gnsssdr_8ic_conjugate_8ic_a_orc_impl(cVector, aVector, num_points);
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}
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#endif /* LV_HAVE_ORC */
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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_8ic_conjugate_8ic_neon(lv_8sc_t* cVector, const lv_8sc_t* aVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 8;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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int8x8x2_t a_val;
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for (unsigned int i = 0; i < sse_iters; ++i)
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{
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a_val = vld2_s8((const int8_t*)a);
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__builtin_prefetch(a + 16);
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a_val.val[1] = vneg_s8(a_val.val[1]);
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vst2_s8((int8_t*)c, a_val);
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a += 8;
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c += 8;
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}
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for (unsigned int i = sse_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_NEON */
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#endif /* INCLUDED_volk_gnsssdr_8ic_conjugate_8ic_H */
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