gather

eve::gather = functor<gather_t>

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
  template<arithmetic_value T, integral_value U>
  as_wide_as_t<T, U> gather(T const* ptr, U idx) noexcept;
 
  template<arithmetic_value T, integral_value U, typename N>
  as_wide_as_t<T, U> gather(aligned_ptr<T, N> ptr, U idx) noexcept;
}

Parameters

• idx: An instance of an integral value.
• ptr: A pointer to the memory region to load from.

Return value

• A value equivalent to:

  as_wide_as_t<T, U> res = { ptr[idx[0]], ptr[idx[1]], ..., ptr[idx[N-1]] };

Example

#include <iostream>
#include <eve/module/core.hpp>
 
int main()
{
  std::vector<int> v{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};
 
  eve::wide<int, eve::fixed<4>> res = eve::gather(v.data(), eve::wide<unsigned char, eve::fixed<4>>{0, 2, 2, 11});
 
  std::cout << "res -> " << res << std::endl;
}