std::experimental::simd_cast, std::experimental::static_simd_cast
Defined in header <experimental/simd>
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template< class V, class T, class Abi > /*see below*/ simd_cast( const simd<T, Abi>& v ) noexcept; |
(1) | (parallelism TS v2) |
template< class V, class T, class Abi > /*see below*/ static_simd_cast( const simd<T, Abi>& v ) noexcept; |
(2) | (parallelism TS v2) |
Cast a simd object to another simd object. If V is T, returns simd<T, Abi>; otherwise, if V is a scalar type, returns simd<V, simd_abi::fixed_size<simd<T, Abi>::size()>>. Otherwise, V must be a simd type, and the function returns V.
- every possible value of the input element can be represented with the output element,
- either is_simd_v<V> is false, or V::size() is simd<T, Abi>::size().
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[edit] Parameters
v | - | the input simd object |
[edit] Return value
A simd object with the i-th element initialized to static_cast<To>(v[i]), where To is the output element type as specified.
[edit] Notes
The TS specification is missing simd_cast and static_simd_cast overloads for simd_mask. The libstdc++ implementation provides the missing overloads in the std::experimental::__proposed namespace. If you already use the
namespace stdx = std::experimental;
shortcut, you might be interested to use
namespace stdx { using namespace std::experimental; using namespace std::experimental::__proposed; }
instead. Alternatively, libstdc++ implements a __cvt() member function in simd_mask, which allows implicit conversion of the mask. See also: https://github.com/VcDevel/std-simd/issues/41
[edit] Example
This section is incomplete Reason: no example |