std::experimental::rebind_simd, std::experimental::resize_simd

Header: <experimental/simd>

Creates a simd or simd_mask type with a different element type or size. The new type likely uses an ABI tag type different from V::abi_type.

# Declarations

template< class T, class V >
struct rebind_simd;

(parallelism TS v2)

template< int N, class V >
struct resize_simd;

(parallelism TS v2)

# Example

#include <experimental/simd>
#include <iostream>
 
namespace stdx = std::experimental;
using floatv = stdx::native_simd<float>;
 
// use double precision internally
floatv dp(floatv x)
{
    using doublev = stdx::rebind_simd_t<double, floatv>;
    return stdx::static_simd_cast<floatv>(stdx::simd_cast<doublev>(x) - 1.234);
}
 
template<class T>
stdx::resize_simd_t<T::size() / 2, T> partial_reduction(T x)
{
    auto [lo, hi] = stdx::split<stdx::resize_simd_t<T::size() / 2, T>>(x);
    return lo + hi;
}
 
int main() 
{
    floatv x([](auto i) { return 1.234f + std::numeric_limits<float>::epsilon() * i; });
    x = dp(x);
    const auto y = partial_reduction(x);
    for (unsigned i = 0; i < y.size(); ++i)
        std::cout << y[i] << ' ';
    std::cout << '\n';
}

# See also

deducededuce_t