none

callable_none_ eve::none = {}

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   // Regular overloads
   constexpr auto none(logical_value auto x)                                      noexcept; // 1
   constexpr auto none(top_bits auto t)                                           noexcept; // 1
 
   // Lanes masking
   constexpr auto none[conditional_expr auto c](/* any of the above overloads */) noexcept; // 2
   constexpr auto none[logical_value auto m](/* any of the above overloads */)    noexcept; // 2
}

Parameters

• x: argument.
• t: top bits.
• c: Conditional expression masking the operation.
• m: Logical value masking the operation.

Return value

1. A bool value which is true if and only if all elements of x are zero.
2. A masked version which is true if and only if all retained elements of x are zero.

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
 
int main()
{
  eve::wide wu0{0u, 1u, 2u, 3u, 4u, 5u, 6u, 7u};
 
  std::cout << "<- wu0                                         = " << wu0 << "\n";
                                                               
  std::cout << "-> none(wu0 <= maximum(wu0)/2)                 = " << eve::none(wu0 <= eve::maximum(wu0)/2) << "\n";
  std::cout << "-> none[ignore_last(2)](wu0 <= maximum(wu0)/2) = " << eve::none[eve::ignore_last(2)](wu0 <= eve::maximum(wu0)/2) << "\n";
}