mirror of https://github.com/gnss-sdr/gnss-sdr
272 lines
9.6 KiB
C
272 lines
9.6 KiB
C
/*!
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* \file volk_gnsssdr_8ic_s8ic_multiply_8ic.h
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* \brief Volk protokernel: multiplies a group of 16 bits vectors by one constant vector
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* \authors <ul>
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* <li> Andrés Cecilia, 2014. a.cecilia.luque(at)gmail.com
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* </ul>
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*
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* Volk protokernel that multiplies a group of 16 bits vectors
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* (8 bits the real part and 8 bits the imaginary part) by one constant vector
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2014 (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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#ifndef INCLUDED_volk_gnsssdr_8ic_s8ic_multiply_8ic_u_H
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#define INCLUDED_volk_gnsssdr_8ic_s8ic_multiply_8ic_u_H
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#include <inttypes.h>
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#include <stdio.h>
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#include <float.h>
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#ifdef LV_HAVE_SSE3
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#include <pmmintrin.h>
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/*!
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\brief Multiplies the input vector by a scalar and stores the results in the third vector
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\param cVector The vector where the results will be stored
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\param aVector The vector to be multiplied
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\param scalar The complex scalar to multiply aVector
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\param num_points The number of complex values in aVector to be multiplied by sacalar and stored into cVector
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*/
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static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_u_sse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points){
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const unsigned int sse_iters = num_points / 8;
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__m128i x, y, mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, realc, imagc, totalc;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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mult1 = _mm_set_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
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y = _mm_set1_epi16 (*(short*)&scalar);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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for(int number = 0;number < sse_iters; number++){
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x = _mm_lddqu_si128((__m128i*)a);
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imagx = _mm_srli_si128 (x, 1);
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imagx = _mm_and_si128 (imagx, mult1);
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realx = _mm_and_si128 (x, mult1);
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realx_mult_realy = _mm_mullo_epi16 (realx, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imagx, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (realx, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imagx, realy);
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realc = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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realc = _mm_and_si128 (realc, mult1);
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imagc = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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imagc = _mm_and_si128 (imagc, mult1);
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imagc = _mm_slli_si128 (imagc, 1);
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totalc = _mm_or_si128 (realc, imagc);
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_mm_storeu_si128((__m128i*)c, totalc);
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a += 8;
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c += 8;
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}
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for (int i = 0; i<(num_points % 8); ++i)
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{
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*c++ = (*a++) * scalar;
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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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/*!
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\brief Multiplies the input vector by a scalar and stores the results in the third vector
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\param cVector The vector where the results will be stored
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\param aVector The vector to be multiplied
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\param scalar The complex scalar to multiply aVector
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\param num_points The number of complex values in aVector to be multiplied by sacalar and stored into cVector
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*/
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static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_generic(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points){
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/*lv_8sc_t* cPtr = cVector;
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const lv_8sc_t* aPtr = aVector;
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for (int i = 0; i<num_points; ++i)
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{
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*cPtr++ = (*aPtr++) * scalar;
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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 = num_points;
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// unwrap loop
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while (number >= 8){
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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number -= 8;
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}
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// clean up any remaining
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while (number-- > 0)
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*cPtr++ = *aPtr++ * scalar;
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}
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#endif /* LV_HAVE_GENERIC */
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#endif /* INCLUDED_volk_gnsssdr_32fc_x2_multiply_32fc_u_H */
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#ifndef INCLUDED_volk_gnsssdr_8ic_s8ic_multiply_8ic_a_H
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#define INCLUDED_volk_gnsssdr_8ic_s8ic_multiply_8ic_a_H
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#include <inttypes.h>
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#include <stdio.h>
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#include <float.h>
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#ifdef LV_HAVE_SSE3
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#include <pmmintrin.h>
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/*!
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\brief Multiplies the input vector by a scalar and stores the results in the third vector
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\param cVector The vector where the results will be stored
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\param aVector The vector to be multiplied
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\param scalar The complex scalar to multiply aVector
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\param num_points The number of complex values in aVector to be multiplied by sacalar and stored into cVector
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*/
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static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_a_sse3(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points){
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const unsigned int sse_iters = num_points / 8;
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__m128i x, y, mult1, realx, imagx, realy, imagy, realx_mult_realy, imagx_mult_imagy, realx_mult_imagy, imagx_mult_realy, realc, imagc, totalc;
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lv_8sc_t* c = cVector;
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const lv_8sc_t* a = aVector;
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mult1 = _mm_set_epi8(0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255);
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y = _mm_set1_epi16 (*(short*)&scalar);
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imagy = _mm_srli_si128 (y, 1);
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imagy = _mm_and_si128 (imagy, mult1);
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realy = _mm_and_si128 (y, mult1);
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for(int number = 0;number < sse_iters; number++){
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x = _mm_load_si128((__m128i*)a);
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imagx = _mm_srli_si128 (x, 1);
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imagx = _mm_and_si128 (imagx, mult1);
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realx = _mm_and_si128 (x, mult1);
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realx_mult_realy = _mm_mullo_epi16 (realx, realy);
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imagx_mult_imagy = _mm_mullo_epi16 (imagx, imagy);
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realx_mult_imagy = _mm_mullo_epi16 (realx, imagy);
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imagx_mult_realy = _mm_mullo_epi16 (imagx, realy);
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realc = _mm_sub_epi16 (realx_mult_realy, imagx_mult_imagy);
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realc = _mm_and_si128 (realc, mult1);
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imagc = _mm_add_epi16 (realx_mult_imagy, imagx_mult_realy);
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imagc = _mm_and_si128 (imagc, mult1);
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imagc = _mm_slli_si128 (imagc, 1);
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totalc = _mm_or_si128 (realc, imagc);
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_mm_store_si128((__m128i*)c, totalc);
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a += 8;
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c += 8;
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}
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for (int i = 0; i<(num_points % 8); ++i)
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{
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*c++ = (*a++) * scalar;
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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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/*!
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\brief Multiplies the input vector by a scalar and stores the results in the third vector
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\param cVector The vector where the results will be stored
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\param aVector The vector to be multiplied
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\param scalar The complex scalar to multiply aVector
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\param num_points The number of complex values in aVector to be multiplied by sacalar and stored into cVector
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*/
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static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_a_generic(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points){
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/*lv_8sc_t* cPtr = cVector;
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const lv_8sc_t* aPtr = aVector;
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for (int i = 0; i<num_points; ++i)
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{
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*cPtr++ = (*aPtr++) * scalar;
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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 = num_points;
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// unwrap loop
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while (number >= 8){
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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*cPtr++ = (*aPtr++) * scalar;
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number -= 8;
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}
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// clean up any remaining
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while (number-- > 0)
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*cPtr++ = *aPtr++ * scalar;
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}
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#endif /* LV_HAVE_GENERIC */
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#ifdef LV_HAVE_ORC
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/*!
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\brief Multiplies the input vector by a scalar and stores the results in the third vector
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\param cVector The vector where the results will be stored
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\param aVector The vector to be multiplied
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\param scalar The complex scalar to multiply aVector
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\param num_points The number of complex values in aVector to be multiplied by sacalar and stored into cVector
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*/
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extern void volk_gnsssdr_8ic_s8ic_multiply_8ic_a_orc_impl(lv_8sc_t* cVector, const lv_8sc_t* aVector, const char scalarreal, const char scalarimag, unsigned int num_points);
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static inline void volk_gnsssdr_8ic_s8ic_multiply_8ic_u_orc(lv_8sc_t* cVector, const lv_8sc_t* aVector, const lv_8sc_t scalar, unsigned int num_points){
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volk_gnsssdr_8ic_s8ic_multiply_8ic_a_orc_impl(cVector, aVector, lv_creal(scalar), lv_cimag(scalar), num_points);
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}
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#endif /* LV_HAVE_ORC */
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#endif /* INCLUDED_volk_gnsssdr_32fc_x2_multiply_32fc_a_H */
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