Experimental library header <experimental/simd>

 

C++

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Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Technical specifications

Symbols index

External libraries

 

Standard Library headers

Note: a slash '/' in a revision mark means that the header was deprecated and/or removed.

Language Support
<cstddef> <cstdlib> <version> (C++20) <limits> <climits>	<cfloat> <cstdint> (C++11) <new> <typeinfo>	<source_location> (C++20) <exception> <initializer_list> (C++11)   <compare> (C++20)	<coroutine> (C++20) <csignal> <csetjmp> <cstdarg>
Concepts
<concepts> (C++20)
Diagnostics
<stdexcept>	<cassert>	<cerrno>	<system_error> (C++11)
General utilities
<utility> <memory> <memory_resource> (C++17) <scoped_allocator> (C++11)   <expected> (C++23)	<bitset> <tuple> (C++11) <optional> (C++17) <any> (C++17)	<variant> (C++17) <type_traits> (C++11) <ratio> (C++11) <chrono> (C++11)	<typeindex> (C++11) <functional> <stacktrace> (C++23) <ctime>
Strings
<string> <string_view> (C++17) <cstring>	<charconv> (C++17) <format> (C++20)	<cctype> <cwctype>	<cwchar> <cuchar> (C++11)
Localization
<locale> <clocale>	<codecvt> (C++11/17)
Containers
<span> (C++20) <array> (C++11) <vector>	<deque> <forward_list> (C++11) <list>	<map> <set> <queue>	<unordered_map> (C++11) <unordered_set> (C++11) <stack>
Iterators
<iterator>
Ranges
<ranges> (C++20)
Algorithms
<algorithm>	<execution> (C++17)
Numerics
<complex> <random> (C++11)	<valarray> <numeric>	<bit> (C++20) <numbers> (C++20)	<cfenv> (C++11) <cmath>
Input/Output
<iosfwd> <ios> <iomanip> <streambuf>	<istream> <ostream> <iostream>	<syncstream> (C++20) <spanstream> (C++23) <sstream> <fstream>	<cstdio> <cinttypes> (C++11) <strstream> (C++98/)
Regular expressions
<regex> (C++11)
Filesystem support
<filesystem> (C++17)
Thread support
<thread> (C++11) <atomic> (C++11) <mutex> (C++11)	<shared_mutex> (C++14) <condition_variable> (C++11)   <future> (C++11)	<stop_token> (C++20) <semaphore> (C++20)	<latch> (C++20) <barrier> (C++20)
C compatibility
<cstdbool> (C++11/17/20) <ccomplex> (C++11/17/20)	<ctgmath> (C++11/17/20) <cstdalign> (C++11/17/20)	<ciso646> (until C++20) <stdatomic.h>

 

Experimental library headers

Filesystem TS
<experimental/filesystem>
Parallelism TS (v1, v2)
<experimental/algorithm> <experimental/execution_policy> <experimental/exception_list>	<experimental/numeric> <experimental/simd> <experimental/task_block>
Library Fundamentals TS (v1, v2, v3)
<experimental/algorithm> <experimental/any> <experimental/array> <experimental/chrono> <experimental/deque> <experimental/forward_list> <experimental/functional> <experimental/future> <experimental/iterator> <experimental/list> <experimental/map> <experimental/memory> <experimental/memory_resource> <experimental/numeric> <experimental/optional> <experimental/propagate_const>	<experimental/random> <experimental/ratio> <experimental/regex> <experimental/scope> <experimental/set> <experimental/source_location> <experimental/string> <experimental/string_view> <experimental/system_error> <experimental/tuple> <experimental/type_traits> <experimental/unordered_map> <experimental/unordered_set> <experimental/utility> <experimental/vector>
Concurrency TS
<experimental/atomic> <experimental/barrier>	<experimental/future> <experimental/latch>
Ranges TS
<experimental/ranges/algorithm> <experimental/ranges/concepts> <experimental/ranges/functional>      <experimental/ranges/iterator>	<experimental/ranges/random> <experimental/ranges/tuple> <experimental/ranges/type_traits> <experimental/ranges/utility>
Coroutines TS
<experimental/coroutine>
Networking TS
<experimental/buffer> <experimental/executor> <experimental/internet> <experimental/io_context>	<experimental/net> <experimental/netfwd> <experimental/socket> <experimental/timer>
Reflection TS
<experimental/reflect>

 

The header defines class templates, tag types, trait types, and function templates for element-wise operations on data-parallel objects.

Synopsis

namespace std::experimental {
inline namespace parallelism_v2 {
namespace simd_abi {
using scalar = /* see below */;
template <int N> using fixed_size = /* see below */;
template <class T>
inline constexpr int max_fixed_size = /* implementation-defined */;
template <class T> using compatible = /* implementation-defined */;
template <class T> using native = /* implementation-defined */;
template <class T, size_t N, class... Abis> struct deduce {
  using type = /* see below */;
};
template <class T, size_t N, class... Abis>
using deduce_t = typename deduce<T, N, Abis...>::type;
} // namespace simd_abi
struct element_aligned_tag {};
struct vector_aligned_tag {};
template <size_t> struct overaligned_tag {};
inline constexpr element_aligned_tag element_aligned{};
inline constexpr vector_aligned_tag vector_aligned{};
template <size_t N> inline constexpr overaligned_tag<N> overaligned{};
// 9.4, simd type traits
template <class T> struct is_abi_tag;
template <class T> inline constexpr bool is_abi_tag_v = is_abi_tag<T>::value;
template <class T> struct is_simd;
template <class T> inline constexpr bool is_simd_v = is_simd<T>::value;
template <class T> struct is_simd_mask;
template <class T>
inline constexpr bool is_simd_mask_v = is_simd_mask<T>::value;
template <class T> struct is_simd_flag_type;
template <class T>
inline constexpr bool is_simd_flag_type_v = is_simd_flag_type<T>::value;
template <class T, class Abi = simd_abi::compatible<T>> struct simd_size;
template <class T, class Abi = simd_abi::compatible<T>>
inline constexpr size_t simd_size_v = simd_size<T, Abi>::value;
template <class T, class U = typename T::value_type> struct memory_alignment;
template <class T, class U = typename T::value_type>
inline constexpr size_t memory_alignment_v = memory_alignment<T, U>::value;
template <class T, class V> struct rebind_simd { using type = /* see below */; };
template <class T, class V>
using rebind_simd_t = typename rebind_simd<T, V>::type;
template <int N, class V> struct resize_simd { using type = /* see below */; };
template <int N, class V>
using resize_simd_t = typename resize_simd<N, V>::type;
// 9.6, Class template simd
template <class T, class Abi = simd_abi::compatible<T>> class simd;
template <class T> using native_simd = simd<T, simd_abi::native<T>>;
template <class T, int N>
using fixed_size_simd = simd<T, simd_abi::fixed_size<N>>;
// 9.8, Class template simd_mask
template <class T, class Abi = simd_abi::compatible<T>> class simd_mask;
template <class T> using native_simd_mask = simd_mask<T, simd_abi::native<T>>;
template <class T, int N>
using fixed_size_simd_mask = simd_mask<T, simd_abi::fixed_size<N>>;
// 9.7.5, Casts
template <class T, class U, class Abi>
/* see below */ simd_cast(const simd<U, Abi> &) noexcept;
template <class T, class U, class Abi>
/* see below */ static_simd_cast(const simd<U, Abi> &) noexcept;
template <class T, class Abi>
fixed_size_simd<T, simd_size_v<T, Abi>>
to_fixed_size(const simd<T, Abi> &) noexcept;
template <class T, class Abi>
fixed_size_simd_mask<T, simd_size_v<T, Abi>>
to_fixed_size(const simd_mask<T, Abi> &) noexcept;
template <class T, int N>
native_simd<T> to_native(const fixed_size_simd<T, N> &) noexcept;
template <class T, int N>
native_simd_mask<T> to_native(const fixed_size_simd_mask<T, N> &) noexcept;
template <class T, int N>
simd<T> to_compatible(const fixed_size_simd<T, N> &) noexcept;
template <class T, int N>
simd_mask<T> to_compatible(const fixed_size_simd_mask<T, N> &) noexcept;
template <size_t... Sizes, class T, class Abi>
tuple<simd<T, simd_abi::deduce_t<T, Sizes>>...>
split(const simd<T, Abi> &) noexcept;
template <size_t... Sizes, class T, class Abi>
tuple<simd_mask<T, simd_mask_abi::deduce_t<T, Sizes>>...>
split(const simd_mask<T, Abi> &) noexcept;
template <class V, class Abi>
array<V, simd_size_v<typename V::value_type, Abi> / V::size()>
split(const simd<typename V::value_type, Abi> &) noexcept;
template <class V, class Abi>
array<V, simd_size_v<typename V::simd_type::value_type, Abi> / V::size()>
split(const simd_mask<typename V::simd_type::value_type, Abi> &) noexcept;
template <size_t N, class T, class A>
array<resize_simd<simd_size_v<T, A> / N, simd<T, A>>, N>
split_by(const simd<T, A> &x) noexcept;
template <size_t N, class T, class A>
array<resize_simd<simd_size_v<T, A> / N, simd_mask<T, A>>, N>
split_by(const simd_mask<T, A> &x) noexcept;
template <class T, class... Abis>
simd<T, simd_abi::deduce_t<T, (simd_size_v<T, Abis> + ...)>>
concat(const simd<T, Abis> &...) noexcept;
template <class T, class... Abis>
simd_mask<T, simd_abi::deduce_t<T, (simd_size_v<T, Abis> + ...)>>
concat(const simd_mask<T, Abis> &...) noexcept;
template <class T, class Abi, size_t N>
resize_simd<simd_size_v<T, Abi> * N, simd<T, Abi>>
concat(const array<simd<T, Abi>, N> &arr) noexcept;
template <class T, class Abi, size_t N>
resize_simd<simd_size_v<T, Abi> * N, simd_mask<T, Abi>>
concat(const array<simd_mask<T, Abi>, N> &arr) noexcept;
// 9.9.4, Reductions
template <class T, class Abi> bool all_of(const simd_mask<T, Abi> &) noexcept;
template <class T, class Abi> bool any_of(const simd_mask<T, Abi> &) noexcept;
template <class T, class Abi> bool none_of(const simd_mask<T, Abi> &) noexcept;
template <class T, class Abi> bool some_of(const simd_mask<T, Abi> &) noexcept;
template <class T, class Abi> int popcount(const simd_mask<T, Abi> &) noexcept;
template <class T, class Abi> int find_first_set(const simd_mask<T, Abi> &);
template <class T, class Abi> int find_last_set(const simd_mask<T, Abi> &);
bool all_of(T) noexcept;
bool any_of(T) noexcept;
bool none_of(T) noexcept;
bool some_of(T) noexcept;
int popcount(T) noexcept;
int find_first_set(T);
int find_last_set(T);
// 9.5, Where expression class templates
template <class M, class T> class const_where_expression;
template <class M, class T> class where_expression;
// 9.9.5, Where functions
template <class T, class Abi>
where_expression<simd_mask<T, Abi>, simd<T, Abi>>
where(const typename simd<T, Abi>::mask_type &, simd<T, Abi> &) noexcept;
template <class T, class Abi>
const_where_expression<simd_mask<T, Abi>, simd<T, Abi>>
where(const typename simd<T, Abi>::mask_type &, const simd<T, Abi> &) noexcept;
template <class T, class Abi>
where_expression<simd_mask<T, Abi>, simd_mask<T, Abi>>
where(const type_identity_t<simd_mask<T, Abit>> &,
      simd_mask<T, Abi> &) noexcept;
template <class T, class Abi>
const_where_expression<simd_mask<T, Abi>, simd_mask<T, Abi>>
where(const type_identity_t<simd_mask<T, Abit>> &,
      const simd_mask<T, Abi> &) noexcept;
template <class T> where_expression<bool, T> where(/* see below */ k, T &d) noexcept;
template <class T>
const_where_expression<bool, T> where(/* see below */ k, const T &d) noexcept;
// 9.7.4, Reductions
template <class T, class Abi, class BinaryOperation = plus<>>
T reduce(const simd<T, Abi> &, BinaryOperation = {});
template <class M, class V, class BinaryOperation>
typename V::value_type reduce(const const_where_expression<M, V> &x,
                              typename V::value_type identity_element,
                              BinaryOperation binary_op);
template <class M, class V>
typename V::value_type reduce(const const_where_expression<M, V> &x,
                              plus<> binary_op = {}) noexcept;
template <class M, class V>
typename V::value_type reduce(const const_where_expression<M, V> &x,
                              multiplies<> binary_op) noexcept;
template <class M, class V>
typename V::value_type reduce(const const_where_expression<M, V> &x,
                              bit_and<> binary_op) noexcept;
template <class M, class V>
typename V::value_type reduce(const const_where_expression<M, V> &x,
                              bit_or<> binary_op) noexcept;
template <class M, class V>
typename V::value_type reduce(const const_where_expression<M, V> &x,
                              bit_xor<> binary_op) noexcept;
template <class T, class Abi> T hmin(const simd<T, abi> &) noexcept;
template <class M, class V>
typename V::value_type hmin(const const_where_expression<M, V> &) noexcept;
template <class T, class Abi> T hmax(const simd<T, abi> &) noexcept;
template <class M, class V>
typename V::value_type hmax(const const_where_expression<M, V> &) noexcept;
// 9.7.6, Algorithms
template <class T, class Abi>
simd<T, Abi> min(const simd<T, Abi> &a, const simd<T, Abi> &b) noexcept;
template <class T, class Abi>
simd<T, Abi> max(const simd<T, Abi> &a, const simd<T, Abi> &b) noexcept;
template <class T, class Abi>
pair<simd<T, Abi>, simd<T, Abi>> minmax(const simd<T, Abi> &a,
                                        const simd<T, Abi> &b) noexcept;
template <class T, class Abi>
simd<T, Abi> clamp(const simd<T, Abi> &v, const simd<T, Abi> &lo,
                   const simd<T, Abi> &hi);
} // namespace parallelism_v2
} // namespace std::experimental