backend_selector.hpp File Reference

Ordered backend selector values shared by tensor storage and linalg dispatch. More...

#include <concepts>
#include <string_view>
#include <tuple>
#include <type_traits>
#include <utility>

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Classes
struct	uni20::linalg::backend_list< Backends >
	Ordered list of backend values tried by the dispatch walk. More...
struct	uni20::linalg::backend_selector_default< Operation, StoragePolicy >
	Uni20-owned operation-specific default for a storage policy. More...
struct	uni20::linalg::backend_selector_override< Operation, StoragePolicy >
	Optional global backend-selector override for an operation and storage policy. More...
struct	uni20::linalg::BlasBackend
	Backend family for BLAS dense linalg kernels, including MPLAPACK scalar adapters. More...
struct	uni20::linalg::CpuReferenceBackend
	Backend value for the reference host CPU dense linalg oracle. More...
struct	uni20::linalg::CublasBackend
	Backend value for cuBLAS dense linalg kernels. More...
struct	uni20::linalg::CudaReferenceBackend
	Backend value for generic CUDA runtime kernels and transfers. More...
struct	uni20::linalg::CusolverBackend
	Backend value for cuSOLVER dense factorization kernels. More...
struct	uni20::linalg::is_backend_list< T >
struct	uni20::linalg::is_backend_list< backend_list< Backends... > >
struct	uni20::linalg::LapackBackend
	Backend family for configured dense LAPACK kernels, including MPLAPACK scalar adapters. More...

Namespaces
namespace	uni20
namespace	uni20::linalg

Concepts
concept	uni20::linalg::KernelBackend
	Named backend value accepted as one dispatch candidate.
concept	uni20::linalg::KernelBackendSelector
	Single named backend or ordered backend list accepted by dispatch front ends.

Functions
template<class... Backends>
	uni20::linalg::backend_list (Backends...) -> backend_list< std::remove_cvref_t< Backends >... >
template<class Backend > requires (!is_backend_list_v<Backend>)
constexpr auto	uni20::linalg::normalize_backend_selector (Backend &&backend)
	Treat a single backend value as a one-entry backend list.
template<class... Backends>
constexpr auto	uni20::linalg::normalize_backend_selector (backend_list< Backends... > selector) -> backend_list< Backends... >
	Return an explicit backend list unchanged.
template<class Operation , class FirstTensor , class... RestTensors>
constexpr auto	uni20::linalg::select_backend (Operation const &operation, FirstTensor const &, RestTensors const &...)
	Select the default backend list for an operation on Tensor operands.
template<class FirstTensor , class... RestTensors, class Operation >
constexpr auto	uni20::linalg::select_backend_for (Operation const &operation)
	Resolve the immutable backend selector for Tensor operand types.
template<class StoragePolicy , class Operation >
constexpr auto	uni20::linalg::select_backend_for_storage (Operation const &operation)
	Resolve a backend selector directly from one storage policy.

Variables
template<class StoragePolicy >
constexpr bool	uni20::linalg::enable_backend_neutral_storage = false
	Opt-in marker for storage policies that do not constrain backend selection.
template<class T >
constexpr bool	uni20::linalg::is_backend_list_v = is_backend_list<std::remove_cvref_t<T>>::value

Detailed Description

Ordered backend selector values shared by tensor storage and linalg dispatch.