exponentmask

auto eve::exponentmask = functor<exponentmask_t>

inlineconstexpr

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
  template<eve::floating_value T> constexpr eve::as_integer_t<T> exponentmask(as<T> t) noexcept;
}

Parameters

t: Type wrapper instance embedding the type of the constant.

Return value

the call eve::exponentmask(as<T>()) returns elementwise, the integral mask to extract the exponent bits of an ieee floating value. The element values are:

• 0x7f800000 if the element type is float
• 0x7ff0000000000000LL if the element type is double

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
 
using wide_ft = eve::wide<float>;
 
template<typename T>
consteval auto constexpr_exponentmask() { return eve::exponentmask(eve::as<T>{}); }
 
int main()
{
  wide_ft wxf;
 
  std::cout << "---- simd"  << std::endl
            << "-> exponentmask(as<wide_ft>())  = " << eve::exponentmask(eve::as<wide_ft>()) << std::endl
            << "-> exponentmask(as(wxf))        = " << eve::exponentmask(eve::as(wxf))       << std::endl;
 
  double       xf;
 
  std::cout << "---- scalar" << std::endl
            << "-> exponentmask(as<float>())         = " << eve::exponentmask(eve::as(float())) << std::endl
            << "-> exponentmask(as<xf))              = " << eve::exponentmask(eve::as(xf)) << std::endl;
 
  std::cout << "-> constexpr exponentmask            = " << constexpr_exponentmask<float>() << std::endl;
 
  return 0;
}