E.V.E
v2022.09.01

◆ ldexp

eve::ldexp = {}
inlineconstexpr

Computes \(\textstyle x 2^n\).

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
template< eve::value T, eve::integral_value N >
eve::common_compatible_t<T, N> ldexp(T x, N n) noexcept;
}
constexpr callable_ldexp_ ldexp
Computes .
Definition: ldexp.hpp:82
Definition: all_of.hpp:22

Parameters

Return value

The value of \(\textstyle x 2^n\) is returned.

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
using iT = std::int32_t;
using wide_it = eve::wide<iT, eve::fixed<4>>;
int main()
{
wide_it qi = {12, 2, -2, 3 };
wide_ft pf = {1.0f, -1.0f, 0.0f, -2.0f};
std::cout << "---- simd" << '\n'
<< "<- pf = " << pf << '\n'
<< "<- qi = " << qi << '\n'
<< "-> ldexp(pf, qi) = " << eve::ldexp(pf, qi) << '\n';
float xf = 2, mxf = -2;
iT yi = 3;
std::cout << "---- scalar" << '\n'
<< "<- xf = " << xf << '\n'
<< "<- mxf = " << mxf << '\n'
<< "<- yi = " << yi << '\n'
<< "-> ldexp(xf, yi) = " << eve::ldexp(xf, yi) << '\n'
<< "-> ldexp(mxf, yi) = " << eve::ldexp(mxf, yi) << '\n';
return 0;
}
Wrapper for SIMD registers.
Definition: wide.hpp:65

Semantic Modifiers

  • Masked Call

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

    Example

    #include <eve/module/core.hpp>
    #include <eve/wide.hpp>
    #include <iostream>
    using iT = std::int32_t;
    using wide_it = eve::wide<iT, eve::fixed<4>>;
    int main()
    {
    wide_it qi = {12, 2, -2, 3 };
    wide_ft pf = {1.0f, -1.0f, 0.0f, -2.0f};
    std::cout << "---- simd" << '\n'
    << "<- pf = " << pf << '\n'
    << "<- qi = " << qi << '\n'
    << "-> ldexp[pf < 0.0](pf, qi) = " << eve::ldexp[pf < 0.0](pf, qi) << '\n';
    return 0;
    }