8.8 KiB
[simd.overview]
29 Numerics library [numerics]
29.10 Data-parallel types [simd]
29.10.7 Class template basic_vec [simd.class]
29.10.7.1 Class template basic_vec overview [simd.overview]
namespace std::simd {template<class T, class Abi> class basic_vec {public:using value_type = T; using mask_type = basic_mask<sizeof(T), Abi>; using abi_type = Abi; using iterator = simd-iterator<basic_vec>; using const_iterator = simd-iterator; constexpr iterator begin() noexcept { return {*this, 0}; }constexpr const_iterator begin() const noexcept { return {this, 0}; }constexpr const_iterator cbegin() const noexcept { return {this, 0}; }constexpr default_sentinel_t end() const noexcept { return {}; }constexpr default_sentinel_t cend() const noexcept { return {}; }static constexpr integral_constant<simd-size-type, simd-size-v<T, Abi>> size {}; constexpr basic_vec() noexcept = default; // [simd.ctor], basic_vec constructorstemplateconstexpr explicit(see below) basic_vec(U&& value) noexcept; template<class U, class UAbi>constexpr explicit(see below) basic_vec(const basic_vec<U, UAbi>&) noexcept; templateconstexpr explicit basic_vec(G&& gen) noexcept; template<class R, class... Flags>constexpr basic_vec(R&& range, flags<Flags...> = {}); template<class R, class... Flags>constexpr basic_vec(R&& range, const mask_type& mask, flags<Flags...> = {}); template<simd-floating-point V>constexpr explicit(see below) basic_vec(const V& reals, const V& imags = {}) noexcept; // [simd.subscr], basic_vec subscript operatorsconstexpr value_type operator const; template<simd-integral I>constexpr resize_t<I::size(), basic_vec> operator[](const I& indices) const; // [simd.complex.access], basic_vec complex accessorsconstexpr auto real() const noexcept; constexpr auto imag() const noexcept; template<simd-floating-point V>constexpr void real(const V& v) noexcept; template<simd-floating-point V>constexpr void imag(const V& v) noexcept; // [simd.unary], basic_vec unary operatorsconstexpr basic_vec& operator++() noexcept; constexpr basic_vec operator++(int) noexcept; constexpr basic_vec& operator--() noexcept; constexpr basic_vec operator--(int) noexcept; constexpr mask_type operator!() const noexcept; constexpr basic_vec operator~() const noexcept; constexpr basic_vec operator+() const noexcept; constexpr basic_vec operator-() const noexcept; // [simd.binary], basic_vec binary operatorsfriend constexpr basic_vec operator+(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator-(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator/(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator%(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator&(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator|(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator^(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator<<(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator>>(const basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec operator<<(const basic_vec&, simd-size-type) noexcept; friend constexpr basic_vec operator>>(const basic_vec&, simd-size-type) noexcept; // [simd.cassign], basic_vec compound assignmentfriend constexpr basic_vec& operator+=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator-=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator/=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator%=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator&=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator|=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator^=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator<<=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator>>=(basic_vec&, const basic_vec&) noexcept; friend constexpr basic_vec& operator<<=(basic_vec&, simd-size-type) noexcept; friend constexpr basic_vec& operator>>=(basic_vec&, simd-size-type) noexcept; // [simd.comparison], basic_vec compare operatorsfriend constexpr mask_type operator==(const basic_vec&, const basic_vec&) noexcept; friend constexpr mask_type operator!=(const basic_vec&, const basic_vec&) noexcept; friend constexpr mask_type operator>=(const basic_vec&, const basic_vec&) noexcept; friend constexpr mask_type operator<=(const basic_vec&, const basic_vec&) noexcept; friend constexpr mask_type operator>(const basic_vec&, const basic_vec&) noexcept; friend constexpr mask_type operator<(const basic_vec&, const basic_vec&) noexcept; // [simd.cond], basic_vec exposition only conditional operatorsfriend constexpr basic_vec simd-select-impl( // exposition onlyconst mask_type&, const basic_vec&, const basic_vec&) noexcept; }; template<class R, class... Ts> basic_vec(R&& r, Ts...) -> see below;}
Every specialization of basic_vec is a complete type.
The specialization of basic_vec<T, Abi> is
enabled, if T is a vectorizable type, and there exists value N in the range [1, 64], such that Abi is deduce-abi-t<T, N>,
otherwise, disabled, if T is not a vectorizable type,
otherwise, it is implementation-defined if such a specialization is enabled.
If basic_vec<T, Abi> is disabled, then the specialization has a deleted default constructor, deleted destructor, deleted copy constructor, and deleted copy assignment.
In addition only the value_type, abi_type, andmask_type members are present.
If basic_vec<T, Abi> is enabled, then basic_vec<T, Abi> is trivially copyable, default-initialization of an object of such a type default-initializes all elements, and value-initialization value-initializes all elements ([dcl.init.general]).
Recommended practice: Implementations should support implicit conversions between specializations ofbasic_vec and appropriate implementation-defined types.
[Note 1:
Appropriate types are non-standard vector types which are available in the implementation.
â end note]