std::experimental::simd_mask<T,Abi>::simd_mask
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std::experimental::simd_mask
Member functions
Non-member functions
simd_mask() noexcept = default;
(1)
(parallelism TS v2)
explicit simd_mask( bool value ) noexcept;
(2)
(parallelism TS v2)
template< class U >
simd_mask( const simd_mask<U, simd_abi::fixed_size<size()>>& other ) noexcept;
(3)
(parallelism TS v2)
simd_mask( const simd_mask<U, simd_abi::fixed_size<size()>>& other ) noexcept;
template< class U, class Flags >
simd_mask( const bool* mem, Flags flags );
(4)
(parallelism TS v2)
simd_mask( const bool* mem, Flags flags );
simd_mask( const simd_mask& other ) noexcept = default;
(5)
(parallelism TS v2) (implicitly declared)
simd_mask( simd_mask&& other ) noexcept = default;
(6)
(parallelism TS v2) (implicitly declared)
1) Constructs a
simd_mask using default initialization (constructed without initializer) or value initialization (constructed with an empty initializer).2) The broadcast constructor constructs a
simd_mask with all values initialized to value.3) Constructs a
simd_mask where the i-th element is initialized to other[i] for all i in the range of [0, size() ). This overload participates in overload resolution only if Abi is simd_abi::fixed_size<size()>.4) The load constructor constructs a
simd_mask where the i-th element is initialized to mem[i] for all i in the range of [0, size() ).5,6) Implicitly declared copy and move constructors. Constructs a
simd_mask where each element is initialized from the values of the elements in other.[edit] Parameters
value
-
the value used for initialization of all
simd_mask elements
other
-
another
simd_mask to copy from
mem
-
a pointer into an array where
[mem, mem + size()) is a valid range
flags
-
if of type vector_aligned_tag, the load constructor may assume
mem to point to storage aligned by memory_alignment_v<simd_mask>
Type requirements
-
is_simd_flag_type_v<Flags> must be true.
[edit] Example
Run this code
#include <algorithm> #include <cstddef> #include <experimental/simd> #include <iostream> namespace stdx = std::experimental; int main() { [[maybe_unused]] stdx::native_simd_mask<int> a; // uninitialized stdx::native_simd_mask<int> b(true); // all elements initialized with true stdx::native_simd_mask<int> c{}; // all elements initialized with false alignas(stdx::memory_alignment_v<stdx::native_simd_mask<int>>) std::array <bool, stdx::native_simd_mask<int>::size() * 2> mem = {}; std::ranges::generate (mem, [i{0}] mutable -> bool { return i++ & 1; }); stdx::native_simd_mask<int> d(&mem[0], stdx::vector_aligned); // {0, 1, 0, 1, ...} stdx::native_simd_mask<int> e(&mem[1], stdx::element_aligned); // {1, 0, 1, 0, ...} const auto xored = b ^ c ^ d ^ e; for (std::size_t i{}; i != xored.size(); ++i) std::cout << xored[i] << ' '; std::cout << '\n'; }
Possible output:
0 0 0 0 0 0 0 0
[edit] See also
(parallelism TS v2)
(class) [edit]
(parallelism TS v2)
(class) [edit]
(parallelism TS v2)
(class template) [edit]