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copy_async
==========

Asynchronous copy. Every variant emits only the *issue* instruction — the caller is
responsible for completion (``cp.async`` commit/wait for ``ldgsts``; mbarrier
arrive/wait for the bulk-tensor and dsmem paths; ``tcgen05.commit`` /
``tcgen05.wait`` for the tensor-memory paths). Selection is by the source/dest
memory pair and scope.

.. list-table::
   :header-rows: 1
   :widths: 26 16 14 44

   * - Variant
     - Pair
     - Prio
     - Issue instruction
   * - :doc:`copy_async/ldgsts`
     - global → shared
     - 20
     - ``cp.async`` (LDGSTS), per-thread vectorized
   * - :doc:`copy_async/tma`
     - global ↔ shared
     - 10
     - ``cp.async.bulk.tensor`` (TMA, descriptor-driven, single-thread)
   * - :doc:`copy_async/dsmem`
     - shared → shared (cross-CTA)
     - 10
     - ``cp.async.bulk`` shared::cluster (``mapa`` remote address)
   * - :doc:`copy_async/tcgen05_cp`
     - shared → tmem
     - 10
     - ``tcgen05.cp.32x128b.warpx4`` (matrix-descriptor driven)
   * - :doc:`copy_async/tcgen05_ldst`
     - tmem ↔ register
     - 10
     - ``tcgen05.ld`` / ``tcgen05.st`` (warpgroup, atom-matched)

.. toctree::
   :maxdepth: 1

   copy_async/ldgsts
   copy_async/tma
   copy_async/dsmem
   copy_async/tcgen05_cp
   copy_async/tcgen05_ldst