mirror of
https://gitlab.com/libeigen/eigen.git
synced 2026-04-10 11:34:33 +08:00
43a95b62bb
Add GPU sparse direct solvers (Cholesky, LDL^T, LU) via cuDSS, 1D/2D FFT via cuFFT with plan caching, and sparse matrix-vector/matrix multiply (SpMV/SpMM) via cuSPARSE. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
|
|
// for linear algebra.
|
|
//
|
|
// Copyright (C) 2026 Rasmus Munk Larsen <rmlarsen@gmail.com>
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla
|
|
// Public License v. 2.0. If a copy of the MPL was not distributed
|
|
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
// GPU sparse LU factorization via cuDSS.
|
|
//
|
|
// For general (non-symmetric) sparse matrices. Uses pivoting.
|
|
// Same three-phase workflow as GpuSparseLLT.
|
|
//
|
|
// Usage:
|
|
// GpuSparseLU<double> lu(A); // analyze + factorize
|
|
// VectorXd x = lu.solve(b); // solve
|
|
|
|
#ifndef EIGEN_GPU_SPARSE_LU_H
|
|
#define EIGEN_GPU_SPARSE_LU_H
|
|
|
|
// IWYU pragma: private
|
|
#include "./InternalHeaderCheck.h"
|
|
|
|
#include "./GpuSparseSolverBase.h"
|
|
|
|
namespace Eigen {
|
|
|
|
/** GPU sparse LU factorization (general matrices).
|
|
*
|
|
* Wraps cuDSS with CUDSS_MTYPE_GENERAL and CUDSS_MVIEW_FULL.
|
|
* Accepts ColMajor SparseMatrix (CSC); internally converts to RowMajor
|
|
* CSR since cuDSS requires CSR input.
|
|
*
|
|
* \tparam Scalar_ float, double, complex<float>, or complex<double>
|
|
*/
|
|
template <typename Scalar_>
|
|
class GpuSparseLU : public internal::GpuSparseSolverBase<Scalar_, GpuSparseLU<Scalar_>> {
|
|
using Base = internal::GpuSparseSolverBase<Scalar_, GpuSparseLU>;
|
|
friend Base;
|
|
|
|
public:
|
|
using Scalar = Scalar_;
|
|
|
|
GpuSparseLU() = default;
|
|
|
|
template <typename InputType>
|
|
explicit GpuSparseLU(const SparseMatrixBase<InputType>& A) {
|
|
this->compute(A);
|
|
}
|
|
|
|
static constexpr bool needs_csr_conversion() { return true; }
|
|
static constexpr cudssMatrixType_t cudss_matrix_type() { return CUDSS_MTYPE_GENERAL; }
|
|
static constexpr cudssMatrixViewType_t cudss_matrix_view() { return CUDSS_MVIEW_FULL; }
|
|
};
|
|
|
|
} // namespace Eigen
|
|
|
|
#endif // EIGEN_GPU_SPARSE_LU_H
|