sqrt

eve::sqrt = {}

inlineconstexpr

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

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

Parameters

• x : real argument.

Return value

• value containing the elementwise square root of x or Nan if x is less than zero.

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 = {1.0f, 2.0f, -3.0f, eve::inf(eve::as<float>())};
 
  std::cout << "---- simd" << '\n'
            << "<- pf              = " << pf << '\n'
            << "-> sqrt(pf)        = " << eve::sqrt(pf) << '\n'
            << "-> raw(sqrt)(pf)   = " << eve::raw(eve::sqrt)(pf) << '\n'
            << "-> sqrt[pf > 0](pf)= " << eve::sqrt[pf > 0](pf) << '\n';
 
 
  float xf = 32.768f;
 
  std::cout << "---- scalar" << '\n'
            << "<- xf              = " << xf << '\n'
            << "-> sqrt(xf)        = " << eve::sqrt(xf) << '\n';
 
  return 0;
}

Semantic Modifiers

• Masked Call

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

• eve::raw

  The call raw(sqrt)(x), call a proper system intrinsic if one exists, but with possibly very poor accuracy in return. Otherwise it uses the non-decorated call.