mirror of https://github.com/gnss-sdr/gnss-sdr
465 lines
15 KiB
C
465 lines
15 KiB
C
/*!
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* \file volk_gnsssdr_32fc_convert_16ic.h
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* \brief VOLK_GNSSSDR kernel: converts float32 complex values to 16 integer complex values taking care of overflow.
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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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* -----------------------------------------------------------------------------
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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_convert_16ic
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*
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* \b Overview
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*
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* Converts a complex vector of 32-bits float each component into
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* a complex vector of 16-bits integer each component.
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* Values are saturated to the limit values of the output data type.
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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_convert_16ic(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points);
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* \endcode
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*
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* \b Inputs
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* \li inputVector: The complex 32-bit float input data buffer.
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* \li num_points: The number of data values to be converted.
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*
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* \b Outputs
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* \li outputVector: The complex 16-bit integer output data buffer.
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*
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*/
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#ifndef INCLUDED_volk_gnsssdr_32fc_convert_16ic_H
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#define INCLUDED_volk_gnsssdr_32fc_convert_16ic_H
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#include "volk_gnsssdr/volk_gnsssdr_complex.h"
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#include <limits.h>
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#include <math.h>
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#ifdef LV_HAVE_SSE2
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#include <emmintrin.h>
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static inline void volk_gnsssdr_32fc_convert_16ic_u_sse2(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 4;
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float* inputVectorPtr = (float*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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float aux;
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unsigned int i;
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const float min_val = (float)SHRT_MIN;
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const float max_val = (float)SHRT_MAX;
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__m128 inputVal1, inputVal2;
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__m128i intInputVal1, intInputVal2;
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__m128 ret1, ret2;
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const __m128 vmin_val = _mm_set_ps1(min_val);
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const __m128 vmax_val = _mm_set_ps1(max_val);
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for (i = 0; i < sse_iters; i++)
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{
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inputVal1 = _mm_loadu_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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inputVal2 = _mm_loadu_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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__VOLK_GNSSSDR_PREFETCH(inputVectorPtr + 8);
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// Clip
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ret1 = _mm_max_ps(_mm_min_ps(inputVal1, vmax_val), vmin_val);
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ret2 = _mm_max_ps(_mm_min_ps(inputVal2, vmax_val), vmin_val);
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intInputVal1 = _mm_cvtps_epi32(ret1);
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intInputVal2 = _mm_cvtps_epi32(ret2);
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intInputVal1 = _mm_packs_epi32(intInputVal1, intInputVal2);
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_mm_storeu_si128((__m128i*)outputVectorPtr, intInputVal1);
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outputVectorPtr += 8;
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}
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for (i = sse_iters * 8; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val)
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aux = max_val;
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else if (aux < min_val)
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aux = min_val;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_SSE2 */
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#ifdef LV_HAVE_SSE
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#include <xmmintrin.h>
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static inline void volk_gnsssdr_32fc_convert_16ic_u_sse(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 4;
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float* inputVectorPtr = (float*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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float aux;
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unsigned int i;
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const float min_val = (float)SHRT_MIN;
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const float max_val = (float)SHRT_MAX;
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__m128 inputVal1, inputVal2;
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__m128i intInputVal1, intInputVal2; // is __m128i defined in xmmintrin.h?
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__m128 ret1, ret2;
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const __m128 vmin_val = _mm_set_ps1(min_val);
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const __m128 vmax_val = _mm_set_ps1(max_val);
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for (i = 0; i < sse_iters; i++)
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{
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inputVal1 = _mm_loadu_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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inputVal2 = _mm_loadu_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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__VOLK_GNSSSDR_PREFETCH(inputVectorPtr + 8);
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// Clip
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ret1 = _mm_max_ps(_mm_min_ps(inputVal1, vmax_val), vmin_val);
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ret2 = _mm_max_ps(_mm_min_ps(inputVal2, vmax_val), vmin_val);
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intInputVal1 = _mm_cvtps_epi32(ret1);
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intInputVal2 = _mm_cvtps_epi32(ret2);
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intInputVal1 = _mm_packs_epi32(intInputVal1, intInputVal2);
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_mm_storeu_si128((__m128i*)outputVectorPtr, intInputVal1);
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outputVectorPtr += 8;
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}
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for (i = sse_iters * 8; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val)
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aux = max_val;
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else if (aux < min_val)
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aux = min_val;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_SSE */
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#ifdef LV_HAVE_AVX2
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#include <immintrin.h>
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static inline void volk_gnsssdr_32fc_convert_16ic_u_avx2(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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const unsigned int avx2_iters = num_points / 8;
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float* inputVectorPtr = (float*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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float aux;
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unsigned int i;
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const float min_val = (float)SHRT_MIN; /// todo Something off here, compiler does not perform right cast
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const float max_val = (float)SHRT_MAX;
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__m256 inputVal1, inputVal2;
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__m256i intInputVal1, intInputVal2;
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__m256 ret1, ret2;
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const __m256 vmin_val = _mm256_set1_ps(min_val);
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const __m256 vmax_val = _mm256_set1_ps(max_val);
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for (i = 0; i < avx2_iters; i++)
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{
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inputVal1 = _mm256_loadu_ps((float*)inputVectorPtr);
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inputVectorPtr += 8;
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inputVal2 = _mm256_loadu_ps((float*)inputVectorPtr);
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inputVectorPtr += 8;
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__VOLK_GNSSSDR_PREFETCH(inputVectorPtr + 16);
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// Clip
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ret1 = _mm256_max_ps(_mm256_min_ps(inputVal1, vmax_val), vmin_val);
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ret2 = _mm256_max_ps(_mm256_min_ps(inputVal2, vmax_val), vmin_val);
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intInputVal1 = _mm256_cvtps_epi32(ret1);
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intInputVal2 = _mm256_cvtps_epi32(ret2);
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intInputVal1 = _mm256_packs_epi32(intInputVal1, intInputVal2);
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intInputVal1 = _mm256_permute4x64_epi64(intInputVal1, 0b11011000);
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_mm256_storeu_si256((__m256i*)outputVectorPtr, intInputVal1);
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outputVectorPtr += 16;
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}
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for (i = avx2_iters * 16; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val)
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aux = max_val;
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else if (aux < min_val)
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aux = min_val;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_AVX2 */
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#ifdef LV_HAVE_SSE2
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#include <emmintrin.h>
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static inline void volk_gnsssdr_32fc_convert_16ic_a_sse2(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 4;
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float* inputVectorPtr = (float*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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float aux;
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unsigned int i;
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const float min_val = (float)SHRT_MIN;
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const float max_val = (float)SHRT_MAX;
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__m128 inputVal1, inputVal2;
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__m128i intInputVal1, intInputVal2;
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__m128 ret1, ret2;
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const __m128 vmin_val = _mm_set_ps1(min_val);
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const __m128 vmax_val = _mm_set_ps1(max_val);
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for (i = 0; i < sse_iters; i++)
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{
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inputVal1 = _mm_load_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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inputVal2 = _mm_load_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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__VOLK_GNSSSDR_PREFETCH(inputVectorPtr + 8);
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// Clip
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ret1 = _mm_max_ps(_mm_min_ps(inputVal1, vmax_val), vmin_val);
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ret2 = _mm_max_ps(_mm_min_ps(inputVal2, vmax_val), vmin_val);
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intInputVal1 = _mm_cvtps_epi32(ret1);
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intInputVal2 = _mm_cvtps_epi32(ret2);
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intInputVal1 = _mm_packs_epi32(intInputVal1, intInputVal2);
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_mm_store_si128((__m128i*)outputVectorPtr, intInputVal1);
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outputVectorPtr += 8;
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}
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for (i = sse_iters * 8; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val)
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aux = max_val;
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else if (aux < min_val)
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aux = min_val;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_SSE2 */
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#ifdef LV_HAVE_SSE
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#include <xmmintrin.h>
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static inline void volk_gnsssdr_32fc_convert_16ic_a_sse(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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const unsigned int sse_iters = num_points / 4;
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const float min_val = (float)SHRT_MIN;
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const float max_val = (float)SHRT_MAX;
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float aux;
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unsigned int i;
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float* inputVectorPtr = (float*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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__m128 inputVal1, inputVal2;
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__m128i intInputVal1, intInputVal2;
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__m128 ret1, ret2;
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const __m128 vmin_val = _mm_set_ps1(min_val);
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const __m128 vmax_val = _mm_set_ps1(max_val);
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for (i = 0; i < sse_iters; i++)
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{
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inputVal1 = _mm_load_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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inputVal2 = _mm_load_ps((float*)inputVectorPtr);
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inputVectorPtr += 4;
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__VOLK_GNSSSDR_PREFETCH(inputVectorPtr + 8);
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// Clip
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ret1 = _mm_max_ps(_mm_min_ps(inputVal1, vmax_val), vmin_val);
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ret2 = _mm_max_ps(_mm_min_ps(inputVal2, vmax_val), vmin_val);
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intInputVal1 = _mm_cvtps_epi32(ret1);
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intInputVal2 = _mm_cvtps_epi32(ret2);
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intInputVal1 = _mm_packs_epi32(intInputVal1, intInputVal2);
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_mm_store_si128((__m128i*)outputVectorPtr, intInputVal1);
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outputVectorPtr += 8;
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}
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for (i = sse_iters * 8; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val)
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aux = max_val;
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else if (aux < min_val)
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aux = min_val;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_SSE */
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#ifdef LV_HAVE_AVX2
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#include <immintrin.h>
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static inline void volk_gnsssdr_32fc_convert_16ic_a_avx2(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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const unsigned int avx2_iters = num_points / 8;
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float* inputVectorPtr = (float*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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float aux;
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unsigned int i;
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const float min_val = (float)SHRT_MIN; /// todo Something off here, compiler does not perform right cast
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const float max_val = (float)SHRT_MAX;
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__m256 inputVal1, inputVal2;
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__m256i intInputVal1, intInputVal2;
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__m256 ret1, ret2;
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const __m256 vmin_val = _mm256_set1_ps(min_val);
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const __m256 vmax_val = _mm256_set1_ps(max_val);
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for (i = 0; i < avx2_iters; i++)
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{
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inputVal1 = _mm256_load_ps((float*)inputVectorPtr);
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inputVectorPtr += 8;
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inputVal2 = _mm256_load_ps((float*)inputVectorPtr);
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inputVectorPtr += 8;
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__VOLK_GNSSSDR_PREFETCH(inputVectorPtr + 16);
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// Clip
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ret1 = _mm256_max_ps(_mm256_min_ps(inputVal1, vmax_val), vmin_val);
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ret2 = _mm256_max_ps(_mm256_min_ps(inputVal2, vmax_val), vmin_val);
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intInputVal1 = _mm256_cvtps_epi32(ret1);
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intInputVal2 = _mm256_cvtps_epi32(ret2);
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intInputVal1 = _mm256_packs_epi32(intInputVal1, intInputVal2);
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intInputVal1 = _mm256_permute4x64_epi64(intInputVal1, 0b11011000);
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_mm256_store_si256((__m256i*)outputVectorPtr, intInputVal1);
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outputVectorPtr += 16;
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}
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for (i = avx2_iters * 16; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val)
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aux = max_val;
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else if (aux < min_val)
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aux = min_val;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_AVX2 */
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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_32fc_convert_16ic_neon(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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const unsigned int neon_iters = num_points / 4;
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float32_t* inputVectorPtr = (float32_t*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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const float min_val_f = (float)SHRT_MIN;
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const float max_val_f = (float)SHRT_MAX;
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float32_t aux;
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unsigned int i;
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const float32x4_t min_val = vmovq_n_f32(min_val_f);
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const float32x4_t max_val = vmovq_n_f32(max_val_f);
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float32x4_t half = vdupq_n_f32(0.5f);
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float32x4_t ret1, ret2, a, b, sign, PlusHalf, Round;
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int32x4_t toint_a, toint_b;
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int16x4_t intInputVal1, intInputVal2;
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int16x8_t res;
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for (i = 0; i < neon_iters; i++)
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{
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a = vld1q_f32((const float32_t*)(inputVectorPtr));
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inputVectorPtr += 4;
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b = vld1q_f32((const float32_t*)(inputVectorPtr));
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inputVectorPtr += 4;
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__VOLK_GNSSSDR_PREFETCH(inputVectorPtr + 8);
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ret1 = vmaxq_f32(vminq_f32(a, max_val), min_val);
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ret2 = vmaxq_f32(vminq_f32(b, max_val), min_val);
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/* in __aarch64__ we can do that with vcvtaq_s32_f32(ret1); vcvtaq_s32_f32(ret2); */
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sign = vcvtq_f32_u32((vshrq_n_u32(vreinterpretq_u32_f32(ret1), 31)));
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PlusHalf = vaddq_f32(ret1, half);
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Round = vsubq_f32(PlusHalf, sign);
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toint_a = vcvtq_s32_f32(Round);
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sign = vcvtq_f32_u32((vshrq_n_u32(vreinterpretq_u32_f32(ret2), 31)));
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PlusHalf = vaddq_f32(ret2, half);
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Round = vsubq_f32(PlusHalf, sign);
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toint_b = vcvtq_s32_f32(Round);
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intInputVal1 = vqmovn_s32(toint_a);
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intInputVal2 = vqmovn_s32(toint_b);
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res = vcombine_s16(intInputVal1, intInputVal2);
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vst1q_s16((int16_t*)outputVectorPtr, res);
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outputVectorPtr += 8;
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}
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for (i = neon_iters * 8; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val_f)
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aux = max_val_f;
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else if (aux < min_val_f)
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aux = min_val_f;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_NEON */
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#ifdef LV_HAVE_GENERIC
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static inline void volk_gnsssdr_32fc_convert_16ic_generic(lv_16sc_t* outputVector, const lv_32fc_t* inputVector, unsigned int num_points)
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{
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float* inputVectorPtr = (float*)inputVector;
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int16_t* outputVectorPtr = (int16_t*)outputVector;
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const float min_val = (float)SHRT_MIN;
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const float max_val = (float)SHRT_MAX;
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float aux;
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unsigned int i;
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for (i = 0; i < num_points * 2; i++)
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{
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aux = *inputVectorPtr++;
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if (aux > max_val)
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aux = max_val;
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else if (aux < min_val)
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aux = min_val;
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*outputVectorPtr++ = (int16_t)rintf(aux);
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}
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}
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#endif /* LV_HAVE_GENERIC */
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#endif /* INCLUDED_volk_gnsssdr_32fc_convert_16ic_H */
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