std::experimental::simd<T,Abi>::size

< cpp‎ | experimental‎ | simd‎ | simd
static constexpr size_t size() noexcept;
 (parallelism TS v2)

Returns the width (the number of values) of simd<T, Abi>.

Example

The actual output depends on target and compiler flags.

#include <experimental/simd>
#include <cstdint>
#include <iostream>
namespace stdx = std::experimental;
 
int main()
{
    stdx::native_simd<std::int32_t> a = 1;
    std::cout << a.size() << '\n';
    std::cout << reduce(a) << '\n';
}

Possible output:

16
16

See also

(parallelism TS v2)
 obtains the number of elements of a given element type and ABI tag
(class template)
[static] (parallelism TS v2)
 returns the width / number of elements
(public static member function of std::experimental::simd_mask<T,Abi>)