choice.hh

Go to the documentation of this file.

#pragma once
 
/// @file
/// @brief getri: blocked, vendor. evidence: docs/perf/lu.md @ingroup api_selection_ops
 
#include <src/select/select.hh>
 
#include <array>
#include <string_view>
#include <variant>
 
namespace batchlas::ops::getri {
 
struct Blocked : select::NoFields<"blocked"> {};  ///< getri_blocked_dispatch: P into C + two public trsm; GPU, square
struct Vendor : select::NoFields<"vendor"> {};    ///< backend::getri_vendor; also CPU, NETLIB, heterogeneous batches
 
using GetriChoice = std::variant<Blocked, Vendor>;  ///< both fieldless: the driver derives wg
 
template <class T>  /// Every compiled choice, in tie-break order (§6.3): native first.
constexpr auto candidates() { return select::all_of<GetriChoice>(); }
 
inline constexpr std::array<std::string_view, 2> last_resort{"vendor", "blocked"};  ///< generality order (§5.5)
inline constexpr select::OpSpec spec{Op::getri, select::Lib::factorization, {last_resort}};  ///< op, library, rules
 
inline constexpr std::array<std::string_view, 2> key_names{"n:log:3", "batch:log"};  ///< work ~ n^3 batch
 
/// Log grid + both sides of the transcribed edges (float 128, cfloat 256); the transcriber (tuned/README.md) spells it.
inline constexpr std::array<int, 24> grid_n{1,   2,   3,   4,   6,   8,   12,  16,  24,  32,   48,   64,
                                            96,  127, 128, 192, 255, 256, 384, 512, 768, 1024, 2048, 4096};
inline constexpr std::array<int, 5> grid_batch{128, 512, 2048, 8192, 32768};
 
}  // namespace batchlas::ops::getri