[feat] Add support for Ascend device memory transfers #382
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Purpose
This PR adds support for transferring data between device and host memory using Ascend native APIs. Currently, only Ascend-specific native APIs have been integrated, with core computing kernels to be added soon.
ascend_stream.cc: Provides wrappers for ACLRT copy operations, including synchronous, asynchronous, and batched operations.ascend_buffer.cc: Offers wrappers for ACLRT memory management APIs, including device memory allocation/deallocation, host memory allocation/deallocation, and host memory mapping/unmapping.Modifications
No user-facing change.
Test
CI passed with new added/existing test.