bit_ceil

eve::bit_ceil = {}

inlineconstexpr

Computes the smallest integral power of two that is not smaller than x.

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   template< eve::value T >
   T bit_ceil(T x) noexcept;
}

Parameters

• x : argument.

Return value

The value of the smallest integral power of two that is not smaller than x is returned.

If that value is not representable in T, the behavior is undefined.

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
 
using wide_it = eve::wide<std::uint32_t, eve::fixed<8>>;
 
int main()
{
  wide_it pi = {14, 1, 3, 7, 20, 23000, 0, 27};
 
  std::cout << "---- simd" << '\n'
            << "<- pi           = " << pi << '\n'
            << "-> bit_ceil(pi) = " << eve::bit_ceil(pi) << '\n';
 
  std::uint32_t xf = 48;
 
  std::cout << "---- scalar" << '\n'
            << "<- xf           = " << xf << '\n'
            << "-> bit_ceil(xf) = " << eve::bit_ceil(xf) << '\n';
  return 0;
}

Semantic Modifiers

• Masked Call

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

  Example

  #include <eve/module/core.hpp>
  #include <eve/wide.hpp>
  #include <iostream>
   
  using wide_it = eve::wide<std::uint32_t, eve::fixed<8>>;
   
  int main()
  {
    wide_it pi = {14, 1, 3, 7, 20, 23000, 0, 27};
   
    std::cout << "---- simd" << '\n'
              << "<- pi                   = " << pi << '\n'
              << "-> bit_ceil[pi > 4](pi) = " << eve::bit_ceil[pi > 4](pi) << '\n'; 
   
    return 0;
  }