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gnss-sdr/src/algorithms/libs/volk_gnsssdr/kernels/volk_gnsssdr/volk_gnsssdr_8i_max_s8i.h

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/*!
* \file volk_gnsssdr_8i_max_s8i.h
* \brief Volk protokernel: calculates the maximum value in a group of 8 bits (char) scalars
* \authors <ul>
* <li> Andrés Cecilia, 2014. a.cecilia.luque(at)gmail.com
* </ul>
*
* Volk protokernel that returns the maximum value of a group of 8 bits (char) scalars
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2014 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef INCLUDED_volk_gnsssdr_8i_max_s8i_u_H
#define INCLUDED_volk_gnsssdr_8i_max_s8i_u_H
#include <volk_gnsssdr/volk_gnsssdr_common.h>
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_SSE4_1
#include<smmintrin.h>
/*!
\brief Returns the max value in src0
\param target The max value in src0
\param src0 The buffer of data to be analysed
\param num_points The number of values in src0 to be analysed
*/
static inline void volk_gnsssdr_8i_max_s8i_u_sse4_1(char target, const char* src0, unsigned int num_points) {
if(num_points > 0){
const unsigned int sse_iters = num_points / 16;
char* inputPtr = (char*)src0;
char max = src0[0];
__VOLK_ATTR_ALIGNED(16) char maxValuesBuffer[16];
__m128i maxValues, compareResults, currentValues;
maxValues = _mm_set1_epi8(max);
for(unsigned int number = 0; number < sse_iters; number++)
{
currentValues = _mm_loadu_si128((__m128i*)inputPtr);
compareResults = _mm_cmpgt_epi8(maxValues, currentValues);
maxValues = _mm_blendv_epi8(currentValues, maxValues, compareResults);
inputPtr += 16;
}
_mm_storeu_si128((__m128i*)maxValuesBuffer, maxValues);
for(int i = 0; i<16; ++i)
{
if(maxValuesBuffer[i] > max)
{
max = maxValuesBuffer[i];
}
}
for(int i = 0; i<(num_points % 16); ++i)
{
if(src0[i] > max)
{
max = src0[i];
}
}
target = max;
}
}
#endif /*LV_HAVE_SSE4_1*/
#ifdef LV_HAVE_SSE2
#include<xmmintrin.h>
/*!
\brief Returns the max value in src0
\param target The max value in src0
\param src0 The buffer of data to be analysed
\param num_points The number of values in src0 to be analysed
*/
static inline void volk_gnsssdr_8i_max_s8i_u_sse2(char target, const char* src0, unsigned int num_points) {
if(num_points > 0){
const unsigned int sse_iters = num_points / 16;
char* inputPtr = (char*)src0;
char max = src0[0];
unsigned short mask;
__VOLK_ATTR_ALIGNED(16) char currentValuesBuffer[16];
__m128i maxValues, compareResults, currentValues;
maxValues = _mm_set1_epi8(max);
for(unsigned int number = 0; number < sse_iters; number++)
{
currentValues = _mm_loadu_si128((__m128i*)inputPtr);
compareResults = _mm_cmpgt_epi8(maxValues, currentValues);
mask = _mm_movemask_epi8(compareResults);
if (mask != 0xFFFF)
{
_mm_storeu_si128((__m128i*)&currentValuesBuffer, currentValues);
mask = ~mask;
int i = 0;
while (mask > 0)
{
if ((mask & 1) == 1)
{
if(currentValuesBuffer[i] > max)
{
max = currentValuesBuffer[i];
}
}
i++;
mask >>= 1;
}
maxValues = _mm_set1_epi8(max);
}
inputPtr += 16;
}
for(int i = 0; i<(num_points % 16); ++i)
{
if(src0[i] > max)
{
max = src0[i];
}
}
target = max;
}
}
#endif /*LV_HAVE_SSE2*/
#ifdef LV_HAVE_GENERIC
/*!
\brief Returns the max value in src0
\param target The max value in src0
\param src0 The buffer of data to be analysed
\param num_points The number of values in src0 to be analysed
*/
static inline void volk_gnsssdr_8i_max_s8i_generic(char target, const char* src0, unsigned int num_points) {
if(num_points > 0)
{
char max = src0[0];
for(unsigned int i = 1; i < num_points; ++i)
{
if(src0[i] > max)
{
max = src0[i];
}
}
target = max;
}
}
#endif /*LV_HAVE_GENERIC*/
#endif /*INCLUDED_volk_gnsssdr_8i_max_s8i_u_H*/
#ifndef INCLUDED_volk_gnsssdr_8i_max_s8i_a_H
#define INCLUDED_volk_gnsssdr_8i_max_s8i_a_H
#include <volk_gnsssdr/volk_gnsssdr_common.h>
#include <inttypes.h>
#include <stdio.h>
#ifdef LV_HAVE_SSE4_1
#include "smmintrin.h"
/*!
\brief Returns the max value in src0
\param target The max value in src0
\param src0 The buffer of data to be analysed
\param num_points The number of values in src0 to be analysed
*/
static inline void volk_gnsssdr_8i_max_s8i_a_sse4_1(char target, const char* src0, unsigned int num_points) {
if(num_points > 0){
const unsigned int sse_iters = num_points / 16;
char* inputPtr = (char*)src0;
char max = src0[0];
__VOLK_ATTR_ALIGNED(16) char maxValuesBuffer[16];
__m128i maxValues, compareResults, currentValues;
maxValues = _mm_set1_epi8(max);
for(unsigned int number = 0; number < sse_iters; number++)
{
currentValues = _mm_load_si128((__m128i*)inputPtr);
compareResults = _mm_cmpgt_epi8(maxValues, currentValues);
maxValues = _mm_blendv_epi8(currentValues, maxValues, compareResults);
inputPtr += 16;
}
_mm_store_si128((__m128i*)maxValuesBuffer, maxValues);
for(int i = 0; i<16; ++i)
{
if(maxValuesBuffer[i] > max)
{
max = maxValuesBuffer[i];
}
}
for(int i = 0; i<(num_points % 16); ++i)
{
if(src0[i] > max)
{
max = src0[i];
}
}
target = max;
}
}
#endif /*LV_HAVE_SSE4_1*/
#ifdef LV_HAVE_SSE2
#include "emmintrin.h"
/*!
\brief Returns the max value in src0
\param target The max value in src0
\param src0 The buffer of data to be analysed
\param num_points The number of values in src0 to be analysed
*/
static inline void volk_gnsssdr_8i_max_s8i_a_sse2(char target, const char* src0, unsigned int num_points) {
if(num_points > 0){
const unsigned int sse_iters = num_points / 16;
char* inputPtr = (char*)src0;
char max = src0[0];
unsigned short mask;
__VOLK_ATTR_ALIGNED(16) char currentValuesBuffer[16];
__m128i maxValues, compareResults, currentValues;
maxValues = _mm_set1_epi8(max);
for(unsigned int number = 0; number < sse_iters; number++)
{
currentValues = _mm_load_si128((__m128i*)inputPtr);
compareResults = _mm_cmpgt_epi8(maxValues, currentValues);
mask = _mm_movemask_epi8(compareResults);
if (mask != 0xFFFF)
{
_mm_store_si128((__m128i*)&currentValuesBuffer, currentValues);
mask = ~mask;
int i = 0;
while (mask > 0)
{
if ((mask & 1) == 1)
{
if(currentValuesBuffer[i] > max)
{
max = currentValuesBuffer[i];
}
}
i++;
mask >>= 1;
}
maxValues = _mm_set1_epi8(max);
}
inputPtr += 16;
}
for(int i = 0; i<(num_points % 16); ++i)
{
if(src0[i] > max)
{
max = src0[i];
}
}
target = max;
}
}
#endif /*LV_HAVE_SSE2*/
#ifdef LV_HAVE_GENERIC
/*!
\brief Returns the max value in src0
\param target The max value in src0
\param src0 The buffer of data to be analysed
\param num_points The number of values in src0 to be analysed
*/
static inline void volk_gnsssdr_8i_max_s8i_a_generic(char target, const char* src0, unsigned int num_points) {
if(num_points > 0)
{
if(num_points > 0)
{
char max = src0[0];
for(unsigned int i = 1; i < num_points; ++i)
{
if(src0[i] > max)
{
max = src0[i];
}
}
target = max;
}
}
}
#endif /*LV_HAVE_GENERIC*/
#endif /*INCLUDED_volk_gnsssdr_8i_max_s8i_a_H*/
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