vector_avx2_i16.cpp

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 * Copyright (C) Akiel Aries, <akiel@akiel.org>, et al.
 *
 * This software is licensed as described in the file LICENSE, which
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 * among other details are referenced in the official documentation
 * seen here : https://akielaries.github.io/openGPMP/ along with
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#include <cmath>
#include <cstdint>
#include <iostream>
#include <numeric>
#include <openGPMP/linalg/vector.hpp>
#include <stdexcept>
#include <vector>
 
#if defined(__x86_64__) || defined(__amd64__) || defined(__amd64)
 
/************************************************************************
 *
 * Vector Operations for AVX ISA
 *
 ************************************************************************/
#if defined(__AVX2__)
 
// AVX family intrinsics
#include <immintrin.h>
 
/************************************************************************
 *
 * Vector Operations on Vectors
 *
 ************************************************************************/
 
/*****************************************************************************/
 
template <typename T>
void gpmp::linalg::vector_add_i16(const T *data1,
                                  const T *data2,
                                  T *result_data,
                                  size_t size) {
    size_t i = 0;
    if (size > 32) {
        for (; i < size - 15; i += 16) {
            __m256i a = _mm256_loadu_si256(
                reinterpret_cast<const __m256i *>(data1 + i));
            __m256i b = _mm256_loadu_si256(
                reinterpret_cast<const __m256i *>(data2 + i));
            __m256i c = _mm256_add_epi8(a, b);
            _mm256_storeu_si256(reinterpret_cast<__m256i *>(result_data + i),
                                c);
        }
    }
    for (; i < size; ++i) {
        result_data[i] = data1[i] + data2[i];
    }
}
 
void gpmp::linalg::vector_add(const std::vector<int16_t> &vec1,
                              const std::vector<int16_t> &vec2,
                              std::vector<int16_t> &result) {
 
    const size_t size = vec1.size();
    vector_add_i16(vec1.data(), vec2.data(), result.data(), size);
}
 
void gpmp::linalg::vector_add(const std::vector<uint16_t> &vec1,
                              const std::vector<uint16_t> &vec2,
                              std::vector<uint16_t> &result) {
    const size_t size = vec1.size();
    vector_add_i16(vec1.data(), vec2.data(), result.data(), size);
}
 
#endif // AVX2
 
#endif // x86