29 Numerics library [numerics]

29.10 Data-parallel types [simd]

29.10.9 Non-member operations [simd.mask.nonmembers]

29.10.9.1 basic_simd_mask binary operators [simd.mask.binary]

🔗
friend constexpr basic_simd_mask operator&&(const basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept; friend constexpr basic_simd_mask operator||(const basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept; friend constexpr basic_simd_mask operator& (const basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept; friend constexpr basic_simd_mask operator| (const basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept; friend constexpr basic_simd_mask operator^ (const basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept;
1
#
Let op be the operator.
2
#
Returns: A basic_simd_mask object initialized with the results of applying op to lhs and rhs as a binary element-wise operation.

29.10.9.2 basic_simd_mask compound assignment [simd.mask.cassign]

🔗
friend constexpr basic_simd_mask& operator&=(basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept; friend constexpr basic_simd_mask& operator|=(basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept; friend constexpr basic_simd_mask& operator^=(basic_simd_mask& lhs, const basic_simd_mask& rhs) noexcept;
1
#
Let op be the operator.
2
#
Effects: These operators apply op to lhs and rhs as a binary element-wise operation.
3
#
Returns: lhs.

29.10.9.3 basic_simd_mask comparisons [simd.mask.comparison]

🔗
friend constexpr basic_simd_mask operator==(const basic_simd_mask&, const basic_simd_mask&) noexcept; friend constexpr basic_simd_mask operator!=(const basic_simd_mask&, const basic_simd_mask&) noexcept; friend constexpr basic_simd_mask operator>=(const basic_simd_mask&, const basic_simd_mask&) noexcept; friend constexpr basic_simd_mask operator<=(const basic_simd_mask&, const basic_simd_mask&) noexcept; friend constexpr basic_simd_mask operator>(const basic_simd_mask&, const basic_simd_mask&) noexcept; friend constexpr basic_simd_mask operator<(const basic_simd_mask&, const basic_simd_mask&) noexcept;
1
#
Let op be the operator.
2
#
Returns: A basic_simd_mask object initialized with the results of applying op to lhs and rhs as a binary element-wise operation.

29.10.9.4 basic_simd_mask exposition only conditional operators [simd.mask.cond]

🔗
friend constexpr basic_simd_mask simd-select-impl( const basic_simd_mask& mask, const basic_simd_mask& a, const basic_simd_mask& b) noexcept;
1
#
Returns: A basic_simd_mask object where the element equals mask[i] ? a[i] : b[i] for all i in the range of [0, size()).
🔗
friend constexpr basic_simd_mask simd-select-impl(const basic_simd_mask& mask, same_as<bool> auto a, same_as<bool> auto b) noexcept;
2
#
Returns: A basic_simd_mask object where the element equals mask[i] ? a : b for all i in the range of [0, size()).
🔗
template<class T0, class T1> friend constexpr simd<see below, size()> simd-select-impl(const basic_simd_mask& mask, const T0& a, const T1& b) noexcept;
3
#
Constraints:
  • (3.1)
    same_as<T0, T1> is true,
  • (3.2)
    T0 is a vectorizable type, and
  • (3.3)
    sizeof(T0) == Bytes.
4
#
Returns: A simd<T0, size()> object where the element equals mask[i] ? a : b for all i in the range of [0, size()).

29.10.9.5 basic_simd_mask reductions [simd.mask.reductions]

🔗
template<size_t Bytes, class Abi> constexpr bool all_of(const basic_simd_mask<Bytes, Abi>& k) noexcept;
1
#
Returns: true if all boolean elements in k are true, otherwise false.
🔗
template<size_t Bytes, class Abi> constexpr bool any_of(const basic_simd_mask<Bytes, Abi>& k) noexcept;
2
#
Returns: true if at least one boolean element in k is true, otherwise false.
🔗
template<size_t Bytes, class Abi> constexpr bool none_of(const basic_simd_mask<Bytes, Abi>& k) noexcept;
3
#
Returns: !any_of(k).
🔗
template<size_t Bytes, class Abi> constexpr simd-size-type reduce_count(const basic_simd_mask<Bytes, Abi>& k) noexcept;
4
#
Returns: The number of boolean elements in k that are true.
🔗
template<size_t Bytes, class Abi> constexpr simd-size-type reduce_min_index(const basic_simd_mask<Bytes, Abi>& k);
5
#
Preconditions: any_of(k) is true.
6
#
Returns: The lowest element index i where k[i] is true.
🔗
template<size_t Bytes, class Abi> constexpr simd-size-type reduce_max_index(const basic_simd_mask<Bytes, Abi>& k);
7
#
Preconditions: any_of(k) is true.
8
#
Returns: The greatest element index i where k[i] is true.
🔗
constexpr bool all_of(same_as<bool> auto x) noexcept; constexpr bool any_of(same_as<bool> auto x) noexcept; constexpr simd-size-type reduce_count(same_as<bool> auto x) noexcept;
9
#
Returns: x.
🔗
constexpr bool none_of(same_as<bool> auto x) noexcept;
10
#
Returns: !x.
🔗
constexpr simd-size-type reduce_min_index(same_as<bool> auto x); constexpr simd-size-type reduce_max_index(same_as<bool> auto x);
11
#
Preconditions: x is true.
12
#
Returns: 0.