std::experimental::all_of, std::experimental::any_of, std::experimental::none_of, std::experimental::some_of

 

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all_ofany_ofnone_ofsome_of	popcount find_first_setfind_last_set
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Defined in header <experimental/simd>
template< class T, class Abi > bool all_of( const simd_mask<T, Abi>& k );	(1)	(parallelism TS v2)
template< class T, class Abi > bool any_of( const simd_mask<T, Abi>& k );	(2)	(parallelism TS v2)
template< class T, class Abi > bool none_of( const simd_mask<T, Abi>& k );	(3)	(parallelism TS v2)
template< class T, class Abi > bool some_of( const simd_mask<T, Abi>& k );	(4)	(parallelism TS v2)

1) Returns true if all values in k are true.

2) Returns true if at least one value in k is true.

3) Returns true if all values in k are false.

4) Returns true if at least one value in k is true but not all values in k are true.

Parameters

k

-

the simd_mask to apply the reduction to

Return value

The boolean result of the horizontal reduction.

Example

Run this code

#include <cassert>
#include <experimental/simd>
 
namespace stq = std::experimental;
 
int main()
{
    using mask = stq::fixed_size_simd_mask<int, 4>;
 
    mask mask1{false}; // = {0, 0, 0, 0}
    assert
    (
        stq::none_of(mask1) == true &&
        stq::any_of(mask1) == false &&
        stq::some_of(mask1) == false &&
        stq::all_of(mask1) == false
    );
 
    mask mask2{true}; // = {1, 1, 1, 1}
    assert
    (
        stq::none_of(mask2) == false &&
        stq::any_of(mask2) == true &&
        stq::some_of(mask2) == false &&
        stq::all_of(mask2) == true
    );
 
    mask mask3{true};
    mask3[0] = mask3[1] = false; // mask3 = {0, 0, 1, 1}
    assert
    (
        stq::none_of(mask3) == false &&
        stq::any_of(mask3) == true &&
        stq::some_of(mask3) == true &&
        stq::all_of(mask3) == false
    );
}