rotate

callable_rotate_ eve::rotate = {}

inlineconstexpr

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   template<simd_value T, std::ptrdiff_t M>
   T rotate(T x, index<N> const &) noexcept;

Parameters

• x : simd value to rotate
• M : position of the middle. In std::rotate(f, m, l) -> this is std::distance(f, m);

Return value

Return T which is a permutation of x such that elements x[M: T::size()) come first followed by x[0:M) and the relative order in those halves is preserved.

Example

#include <iostream>
#include <eve/module/core.hpp>
 
using wide_it = eve::wide<std::uint64_t, eve::fixed<4>>;
 
int main()
{
  wide_it x = {1, 2, 3, 4};
 
  std::cout << "---- simd" << '\n'
            << "<- x                        = " << x << '\n'
            << "-> rotate(x, eve::index<0>) = " << eve::rotate(x, eve::index<0>) << '\n'
            << "-> rotate(x, eve::index<1>) = " << eve::rotate(x, eve::index<1>) << '\n'
            << "-> rotate(x, eve::index<2>) = " << eve::rotate(x, eve::index<2>) << '\n'
            << "-> rotate(x, eve::index<3>) = " << eve::rotate(x, eve::index<3>) << '\n'
            << "-> rotate(x, eve::index<4>) = " << eve::rotate(x, eve::index<4>) << '\n';
 
}