实验性库头文件 <experimental/simd>

 

C++

编译器支持

自立实现与有宿主实现

语言

标准库

标准库标头

具名要求

功能特性测试宏 (C++20)

语言支持库

概念库 (C++20)

元编程库 (C++11)

诊断库

通用工具库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

本地化库

输入/输出库

文件系统库 (C++17)

正则表达式库 (C++11)

并发支持库 (C++11)

技术规范

符号索引

外部库

 

标准库标头

语言支持
<cstddef> <cstdlib> <version> (C++20) <limits> <climits>	<cfloat> <cstdint> (C++11) <stdfloat> (C++23) <new> <typeinfo>	<source_location> (C++20) <exception> <initializer_list> (C++11) <compare> (C++20)	<coroutine> (C++20) <csignal> <csetjmp> <cstdarg>
概念
<concepts> (C++20)
诊断
<stdexcept> <stacktrace> (C++23)	<cassert>	<cerrno>	<system_error> (C++11)
内存管理
<memory>	<memory_resource> (C++17)	<scoped_allocator> (C++11)
元编程
<type_traits> (C++11)	<ratio> (C++11)
通用工具
<utility> <tuple> (C++11) <optional> (C++17) <variant> (C++17)	<any> (C++17) <debugging> (C++26) <expected> (C++23) <bitset>	<functional> <typeindex> (C++11) <execution> (C++17)	<charconv> (C++17) <format> (C++20) <bit> (C++20)
字符串
<string_view> (C++17) <string>	<cctype> <cwctype>	<cstring> <cwchar>	<cuchar> (C++11)
容器
<array> (C++11) <deque> <forward_list> (C++11) <list>	<vector> <map> <set> <unordered_map> (C++11)	<unordered_set> (C++11) <queue> <stack> <flat_map> (C++23)	<flat_set> (C++23) <span> (C++20) <mdspan> (C++23) <inplace_vector> (C++26)
迭代器
<iterator>
范围
<ranges> (C++20)	<generator> (C++23)
算法
<algorithm>	<numeric>
数值
<cfenv> (C++11) <complex>	<random> (C++11) <valarray>	<cmath> <linalg> (C++26)	<numbers> (C++20)
日期时间
<chrono> (C++11)	<ctime>
本地化
<locale>	<clocale>	<codecvt> (C++11/17/26*)	<text_encoding> (C++26)
输入/输出
<iosfwd> <iostream> <ios> <streambuf>	<istream> <ostream> <iomanip> <print> (C++23)	<sstream> <spanstream> (C++23) <fstream> <syncstream> (C++20)	<filesystem> (C++17) <cstdio> <cinttypes> (C++11) <strstream> (C++98/26*)
正则表达式
<regex> (C++11)
并发支持
<stop_token> (C++20) <thread> (C++11) <atomic> (C++11) <rcu> (C++26)	<stdatomic.h> (C++23) <mutex> (C++11) <shared_mutex> (C++14)	<condition_variable> (C++11)   <semaphore> (C++20) <latch> (C++20)	<barrier> (C++20) <future> (C++11) <hazard_pointer> (C++26)
C 兼容
<cstdbool> (C++11/17/20*)   <ccomplex> (C++11/17/20*)	<ctgmath> (C++11/17/20*)	<cstdalign> (C++11/17/20*)	<ciso646> (C++20 前)

 

实验性库头文件

执行 P2300
<experimental/execution>
文件系统 TS
<experimental/filesystem>
并行 TS (v1, v2)
experimental/algorithm experimental/execution_policy experimental/exception_list	experimental/numeric <experimental/simd> experimental/task_block
库基础 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
并发 TS
experimental/atomic experimental/barrier	experimental/future experimental/latch
范围 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>
协程TS
experimental/coroutine
网络 TS
experimental/buffer experimental/executor experimental/internet experimental/io_context	<experimental/net> experimental/netfwd experimental/socket experimental/timer
反射 TS
<experimental/reflect>

 

此头文件为数据并行对象上的逐元素操作定义了一组类模板、标签类和函数模板。

概要

namespace std::experimental {
inline namespace parallelism_v2 {
namespace simd_abi {
using scalar = /* 见下文 */;
template <int N> using fixed_size = /* 见下文 */;
template <class T>
inline constexpr int max_fixed_size = /* 由实现定义 */;
template <class T> using compatible = /* 由实现定义 */;
template <class T> using native = /* 由实现定义 */;
template <class T, size_t N, class... Abis> struct deduce {
  using type = /* 见下文 */;
};
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 类型特征
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 = /* 见下文 */; };
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 = /* 见下文 */; };
template <int N, class V>
using resize_simd_t = typename resize_simd<N, V>::type;
// 9.6, 类模板 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, 类模板 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, 转型
template <class T, class U, class Abi>
/* 见下文 */ simd_cast(const simd<U, Abi> &) noexcept;
template <class T, class U, class Abi>
/* 见下文 */ 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, 归约
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 表达式类模板
template <class M, class T> class const_where_expression;
template <class M, class T> class where_expression;
// 9.9.5, where 函数
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(/* 见下文 */ k, T &d) noexcept;
template <class T>
const_where_expression<bool, T> where(/* 见下文 */ k, const T &d) noexcept;
// 9.7.4, 归约
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, 算法
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