swap_pairs

callable_swap_pairs_ eve::swap_pairs = {}

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   template<value T, std::ptrdiff_t I0, std::ptrdiff_t I1 >
   T swap_pairs(T x, index_t<I0> const & i0, index_t<I1> const & i1);

Parameters

• x : argument.
• i0 : first index
• i1 : second index

Return value

Return x with element i0 and i1 swapped. Action on scalar is identity. Assert if i0 or i1 are out of range.

Example

 
#include <eve/wide.hpp>
#include <iostream>
#include <eve/module/core.hpp>
 
using wide_it = eve::wide<std::uint32_t, eve::fixed<4>>;
 
int main()
{
  wide_it pi = {1, 3, 7, 15};
  pi = eve::inc(pi);
  auto _0 =eve::index_t<0>();
  auto _1 =eve::index_t<1>();
  auto _2 =eve::index_t<2>();
  auto _3 =eve::index_t<3>();
  std::cout << "---- simd" << '\n'
            << "<- pi                     = " << pi << '\n'
            << "-> swap_pairs(pi, _0, _3) = " << eve::swap_pairs(pi, _0, _3) << '\n'
            << "-> swap_pairs(pi, _1, _2) = " << eve::swap_pairs(pi, _1, _2) << '\n'
            << "-> swap_pairs(pi, _0, _1) = " << eve::swap_pairs(pi, _0, _1) << '\n';
 
  return 0;
}