std::experimental::simd_abi::fixed_size
< cpp | experimental | simd
|
Defined in header
<experimental/simd> |
||
|
template< int N >
struct fixed_size {}; |
(parallelism TS v2) | |
The simd_abi::fixed_size<N> tag type ensures data-parallel types to store and manipulate N elements (i.e. simd<T, simd_abi::fixed_size<N>>::size() returns N). An implementation shall support at least all N ∈ [1 … 32]. Additionally, for every supported simd<T, Abi>, where Abi is an implementation-defined ABI tag, N = simd<T, Abi>::size() shall be supported.
Notes
An implementation may choose to forego ABI compatibility between differently compiled translation units for simd and simd_mask instantiations using the same simd_abi::fixed_size<N> tag. Otherwise, the efficiency of simd<T, Abi> is likely to be better than simd<T, fixed_size<simd_size_v<T, Abi>>> (with Abi not an instance of simd_abi::fixed_size).
See also
|
(parallelism TS v2)
|
the maximum number of elements guaranteed to be supported by fixed (constant) |
|
(parallelism TS v2)
|
tag type for storing a single element (typedef) |
|
(parallelism TS v2)
|
tag type that ensures ABI compatibility (alias template) |
|
(parallelism TS v2)
|
tag type that is most efficient (alias template) |
|
(parallelism TS v2)
|
obtains an ABI type for given element type and number of elements (class template) |