1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
#include <cstddef>
#include <vector>
#include "xsimd/xsimd.hpp"
#ifdef XSIMD_NO_SUPPORTED_ARCHITECTURE
using vector = std::vector<float>;
#else
using vector = std::vector<float, xsimd::aligned_allocator<float>>;
#endif
void function(vector const & a, vector const & b, vector & result)
{
auto const size = a.size();
#ifdef XSIMD_NO_SUPPORTED_ARCHITECTURE
for(std::size_t i=0; i<size; ++i)
{
result[i] = xsimd::abs(a[i]) + b[i];
}
#else
constexpr std::size_t simd_size = xsimd::simd_type<float>::size;
auto const vectorized_size = size % simd_size;
for(std::size_t i=0; i<vectorized_size; i+=simd_size)
{
auto batch_a = xsimd::load_aligned(&a[i]);
auto batch_b = xsimd::load_aligned(&b[i]);
auto batch_result = (batch_a+batch_b)/2.;
batch_result.store_aligned(&result[i]);
}
for(std::size_t i=vectorized_size; i<size; ++i)
{
result[i] = (a[i]+b[i])/2.;
}
#endif
}
int main()
{
vector a(100, 1);
vector b(100, 2);
vector result(100);
function(a, b, result);
return 0;
}
|
