swap_adjacent

eve::swap_adjacent = detail::named_shuffle_1<swap_adjacent_t> {}

inlineconstexpr

Defined in Header

#include <eve/module/core.hpp>

Can apply an opteration for group of elements instead of elements. Group size has to be 0 < G < T::size()

template<simd_value T, std::ptrdiff_t G>
T swap_adjacent(T x, fixed<G>)  // (1)
 
template<simd_value T>
T swap_adjacent(T x)  // (2)

Parameters

• x - simd_value to shuffle
• G - (optional) - number of elements to treat as one.

Return value

Return x where groups of contiguous G elements are swapped.

Example

#include <eve/module/core.hpp>
#include <tts/tts.hpp>
 
using w_t = eve::wide<std::uint32_t, eve::fixed<4>>;
 
int main()
{
  w_t x {0, 1, 2, 3};
 
  TTS_EXPECT( eve::all( w_t{1, 0, 3, 2} == eve::swap_adjacent(x)) );
  TTS_EXPECT( eve::all( w_t{1, 0, 3, 2} == eve::swap_adjacent(x, eve::lane<1>)) );
  TTS_EXPECT( eve::all( w_t{2, 3, 0, 1} == eve::swap_adjacent(x, eve::lane<2>)) );
 
  // lane<0> and lane<4> are not OK.
}