is_imag

eve::is_imag = {}

inlineconstexpr

Returns a logical true if and only if the element value is imaginary.

For real entries 0 is the only imaginary number: its real part is 0!

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   template< eve::floating_value T >
   eve::as_logical<T> is_imag(T x) noexcept;
}

Parameters

• x : argument.

Return value

Returns elementwise x == 0 for real entries.

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
 
using wide_ft = eve::wide<float, eve::fixed<4>>;
 
int main()
{
  wide_ft pf = {0.0f, 1.0f, -0.0f, -2.0f};
 
  std::cout << "---- simd" << '\n'
            << "<- pf          = " << pf << '\n'
            << "-> is_imag(pf) = " << eve::is_imag(pf) << '\n';
 
  float xf = 1.0f;
 
  std::cout << "---- scalar" << '\n'
            << "<- xf          = " << xf << '\n'
            << "-> is_imag(xf) = " << eve::is_imag(xf) << '\n';
  return 0;
}

Semantic Modifiers

• Masked Call

  The call eve;is_imag[mask](x) provides a masked version of eve::is_imag which is equivalent to if_else (mask, is_imag(x), eve::false( eve::as(x))).

  Example

  #include <eve/module/core.hpp>
  #include <eve/wide.hpp>
  #include <iostream>
   
  using wide_ft = eve::wide<float, eve::fixed<4>>;
   
  int main()
  {
    wide_ft pf = {0.0f, 1.0f, -0.0f, -2.0f};
   
    std::cout << "---- simd" << '\n'
              << "<- pf          = " << pf << '\n'
              << "-> is_imag[is_positive(pf)](pf) = " << eve::is_imag[eve::is_positive(pf)](pf) << '\n';
    return 0;
  }