std::experimental::simd_size

 

C++

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Technical specifications

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Library fundamentals 3 (library fundamentals TS v3)

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Extensions for parallelism 2 (parallelism TS v2)

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Extensions for concurrency 2 (concurrency TS v2)

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Extensions for parallelism v2

Parallel exceptions
exception_list
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execution::vector_policy	execution::unsequenced_policy
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induction reductionreduction_plusreduction_minusreduction_multiplies	reduction_bit_andreduction_bit_orreduction_bit_xorreduction_minreduction_max	for_loopfor_loop_stridedfor_loop_nfor_loop_n_strided
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execution::ordered_update_t
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SIMD library

Main classes
simd	simd_mask
ABI tags
simd_abi::scalar simd_abi::fixed_size	simd_abi::native simd_abi::compatible	simd_abi::max_fixed_size simd_abi::deduce
Alignment tags
element_aligned_tagelement_aligned	vector_aligned_tagvector_aligned	overaligned_tagoveraligned
Where expression
where	where_expression	const_where_expression
Casts
simd_caststatic_simd_cast	to_fixed_sizeto_compatibleto_native	splitsplit_by concat
Algorithms
min max	minmax clamp
Reduction
reducehminhmax
Mask reduction
all_ofany_ofnone_ofsome_of	popcount find_first_setfind_last_set
Traits
is_simdis_simd_mask is_abi_tag is_simd_flag_type	simd_size memory_alignment rebind_simdresize_simd
Math functions

 

Defined in header <experimental/simd>
template< class T, class Abi = simd_abi::compatible<T> > struct simd_size;		(parallelism TS v2)

If T is a vectorizable type and is_abi_tag_v<Abi> is true, provides the member constant value equal to the width (number of elements) of simd<T, Abi>, irrespective of whether simd<T, Abi> is supported or not. For any other types T and Abi, there is no member value.

The behavior of a program that adds specializations for std::simd_size or std::simd_size_v (since C++17) is undefined.

Helper variable template

template< class T, class Abi = simd_abi::compatible<T> > inline constexpr std::size_t simd_size_v = simd_size<T, Abi>::value;		(parallelism TS v2)

Inherited from std::integral_constant

Member constants

value [static]

the width of simd<T, Abi> (public static member constant)

Member functions

operator std::size_t	converts the object to std::size_t, returns value (public member function)
operator() (C++14)	returns value (public member function)

Member types

Type	Definition
value_type	std::size_t
type	std::integral_constant<std::size_t, value>

See also

size [static] (parallelism TS v2)	returns the width / number of elements (public static member function of std::experimental::simd<T,Abi>)
size [static] (parallelism TS v2)	returns the width / number of elements (public static member function of std::experimental::simd_mask<T,Abi>)