This directory contains low-level wrappers for external backend libraries. These headers should expose library capabilities and calling conventions without owning tensor semantics, symmetry metadata, or high-level operation policy.

backend.hpp: common backend include point.
`blas/`: BLAS-family backend wrappers, vendor detection helpers, OpenBLAS/MKL adapters, reference BLAS prototypes, and MPLAPACK binary128 hooks.
`lapack/`: LAPACK-family declarations grouped by problem shape, with reference and MPLAPACK-backed variants.
`mplapack/`: binary80 and MPFR/MPC provider arrays, precision scopes, and dense algorithm adapters.
`cuda/`: device discovery, scoped process-wide runtime resources, stream/completion management, typed buffers, and CUDA-task resource awaiters.
`cublas/`: cuBLAS handle/stream execution leases and checked GEMM wrappers.
`cusolver/`: cuSOLVER handle/stream leases and provider error handling.

Notes

Prefer explicit backend capability checks over assuming one global vendor stack supports every operation and scalar type.
Backend wrappers sit below linalg/ and kernel/; they should not grow front-end tensor policy or symmetry lowering rules.
Keep external-library warning, option, and include-directory behavior local to the dependency target rather than leaking it through Uni20 targets.

Contents

Notes

Related Documentation