std::experimental:: simd_cast, std::experimental:: static_simd_cast

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C++
Experimental
Extensions for parallelism v2
SIMD library
Defined in header <experimental/simd>
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.

1) This function does not participate in overloading resolution unless
  • 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 ( ) .
2) This function does not participate in overloading resolution unless either is_simd_v < V > is false, or V :: size ( ) is simd < T, Abi > :: size ( ) .

Parameters

v - the input simd object

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.

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

Example

This section is incomplete
Reason: no example
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