E.V.E
v2023.02.15
 
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◆ is_nemz

auto eve::is_nemz = functor<is_nemz_t>
inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
// Regular overload
constexpr auto is_nemz(floating_value auto x) noexcept; // 1
// Lanes masking
constexpr auto is_nemz[conditional_expr auto c](floating_value auto x) noexcept; // 2
constexpr auto is_nemz[logical_value auto m](floating_value auto x) noexcept; // 2
}
Specifies that a type is a Conditional Expression.
Definition conditional.hpp:28
The concept floating_value<T> is satisfied if and only if T satisfies eve::value and the element type...
Definition value.hpp:116
The concept logical_value<T> is satisfied if and only if T satisfies eve::value and the element type ...
Definition value.hpp:132
constexpr auto is_nemz
elementwise callable returning a logical true if and only if a "negative" zero.
Definition is_nemz.hpp:71
EVE Main Namespace.
Definition abi.hpp:18

Parameters

Return value

  1. is_nemz(x) is semantically equivalent to bitwise equality to mzero(as(x)).
  2. The operation is performed conditionnaly.

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
int main()
{
eve::wide wf0{0.0, 1.0, 2.0, 3.0, -1.0, -2.0, -3.0, -0.0};
eve::wide wi0{0, 1, 2, 3, -1, -2, -3, -4};
eve::wide wu0{0u, 1u, 2u, 3u, 4u, 5u, 6u, 7u};
std::cout << "<- wf0 = " << wf0 << "\n";
std::cout << "-> is_nemz(wf0) = " << eve::is_nemz(wf0) << "\n";
std::cout << "-> is_nemz[ignore_last(2)](wf0) = " << eve::is_nemz[eve::ignore_last(2)](wf0) << "\n";
std::cout << "-> is_nemz[wf0 != 0](wf0) = " << eve::is_nemz[wf0 != 0](wf0) << "\n";
}
Conditional expression ignoring the k last lanes from a eve::simd_value.
Definition conditional.hpp:332
Wrapper for SIMD registers.
Definition wide.hpp:70