38 lines
1002 B
ReStructuredText
38 lines
1002 B
ReStructuredText
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.. _libcudacxx-ptx-instructions-mapa:
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mapa
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====
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- PTX ISA:
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`mapa <https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#data-movement-and-conversion-instructions-mapa>`__
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This instruction can `currently not be
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implemented <https://github.com/NVIDIA/cccl/issues/1414>`__ by libcu++.
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The instruction can be accessed through the cooperative groups
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`cluster_group <https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#cluster-group>`__
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API:
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Usage:
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------
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.. code:: cuda
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#include <cooperative_groups.h>
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__cluster_dims__(2)
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__global__ void kernel() {
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__shared__ int x;
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x = 1;
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namespace cg = cooperative_groups;
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cg::cluster_group cluster = cg::this_cluster();
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cluster.sync();
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// Get address of remote shared memory value:
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unsigned int other_block_rank = cluster.block_rank() ^ 1;
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int * remote_x = cluster.map_shared_rank(&bar, other_block_rank);
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// Write to remote value:
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*remote_x = 2;
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}
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