has_equal_in

callable_has_equal_in_ eve::has_equal_in = {}

inlineconstexpr

Optional last parameter allows to ovewrite the equality from eve::is_equal to an arbitrary simd binary predicate.

We took the idea for the operation from: "Faster-Than-Native Alternatives for x86 VP2INTERSECT Instructions" by Guillermo Diez-Canas. Link: https://arxiv.org/abs/2112.06342

Parameters

• x : argument.
• match_against argument.
• predicate (default eve::is_equal_to)

Return value

logical built as described previously

Example

#include <iostream>
#include <eve/module/core.hpp>
 
using wide_it = eve::wide<std::uint32_t, eve::fixed<4>>;
 
int main()
{
  wide_it x = {2, 1, 2, 4};
  wide_it y = {0, 2, 3, 1};
 
  std::cout << "---- simd" << '\n'
            << "<- x                  = " << x << '\n'
            << "<- y                  = " << y << '\n'
            << "-> has_equal_in(x, y) = " << eve::has_equal_in(x, y) << '\n'
            << "-> has_equal_in(y, x) = " << eve::has_equal_in(y, x) << '\n';
}