simd_permute.h File Reference

Permutation functions for the Parallelism TS 2 simd types. More...

#include "simd_concepts.h"
#include "simd.h"
#include "detail.h"
#include "constexpr_wrapper.h"
#include <bit>

Go to the source code of this file.

Namespaces
namespace	vir
	This namespace collects libraries and tools authored by Matthias Kretz.
namespace	vir::simd_permutations
	Predefined permutations.

Functions
template<std::size_t N = 0, vir::any_simd_or_mask V, detail::index_permutation_function< V::size()> F>
constexpr stdx::resize_simd_t< N==0 ? V::size() :N, V >	vir::simd_permute (V const &v, F const idx_perm) noexcept
	Permute the elements of v using the index permutation function idx_perm.
template<std::size_t N = 0, vir::vectorizable T, detail::index_permutation_function< 1 > F>
constexpr std::conditional_t< N<=1, T, stdx::resize_simd_t< N==0 ? 1 :N, stdx::simd< T > > >	vir::simd_permute (T const &v, F const idx_perm) noexcept
	Overload for scalar inputs.
template<int Offset, vir::any_simd_or_mask V>
constexpr V	vir::simd_shift_in (V const &a, std::convertible_to< V > auto const &... more) noexcept
	Concatenate a, more..., shift by Offset, and return the first V::size() elements.

Variables
constexpr int	vir::simd_permute_zero = std::numeric_limits<int>::max()
	Constant that requests a zero value instead of one of the input values.
constexpr int	vir::simd_permute_uninit = simd_permute_zero - 1
	Constant that allows an arbitrary value instead of one of the input values.
constexpr DuplicateEven	vir::simd_permutations::duplicate_even {}
	Copies even elements into odd elements.
constexpr DuplicateOdd	vir::simd_permutations::duplicate_odd {}
	Copies odd elements into even elements.
template<unsigned N = 1u>
constexpr SwapNeighbors< N >	vir::simd_permutations::swap_neighbors {}
	Swaps N neighboring elements.
template<int Position>
constexpr Broadcast< Position >	vir::simd_permutations::broadcast {}
	Copy element at index Position into all elements.
constexpr Broadcast< 0 >	vir::simd_permutations::broadcast_first {}
	Copy the first element into all elements.
constexpr Broadcast<-1 >	vir::simd_permutations::broadcast_last {}
	Copy the last element into all elements.
constexpr Reverse	vir::simd_permutations::reverse {}
	Reverse the elements.
template<int Offset>
constexpr Rotate< Offset >	vir::simd_permutations::rotate {}
	Rotate the elements by Offset.
template<int Offset>
constexpr Shift< Offset >	vir::simd_permutations::shift {}
	Shift the elements by Offset.

Detailed Description

Permutation functions for the Parallelism TS 2 simd types.