async_work_group_strided_copy - Performs an async gather of num_elements gentype elements from source to
Contents
Copyright
Copyright © 2007-2011 The Khronos Group Inc.
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Description
The OpenCL C programming language implements these functions that provide asynchronous copies between
global and local memory and a prefetch from global memory.
Perform an async gather of num_gentypesgentype elements from src to dst. The src_stride is the stride in
elements for each gentype element read from src. The dst_stride is the stride in elements for each
gentype element written to dst. The async gather is performed by all work-items in a work-group.
This built-in function must therefore be encountered by all work-items in a work-group executing the
kernel with the same argument values; otherwise the results are undefined.
Returns an event object that can be used by wait_group_events(3clc) to wait for the async copy to finish.
The event argument can also be used to associate the async_work_group_strided_copy with a previous async
copy allowing an event to be shared by multiple async copies; otherwise event should be zero.
If event argument is non-zero, the event object supplied in event argument will be returned.
This function does not perform any implicit synchronization of source data such as using a barrier(3clc)
before performing the copy.
The behavior of async_work_group_strided_copy is undefined if src_stride or dst_stride is 0, or if the
src_stride or dst_stride values cause the src or dst pointers to exceed the upper bounds of the address
space during the copy.
Name
async_work_group_strided_copy - Performs an async gather of num_elements gentype elements from source to
destination.
event_tasync_work_group_strided_copy(__localgentype*dst,const__globalgentype*src,size_tnum_gentypes,size_tsrc_stride,event_tevent);event_tasync_work_group_strided_copy(__globalgentype*dst,const__localgentype*src,size_tnum_gentypes,size_tdst_stride,event_tevent);Notes
1. OpenCL Specification
page 276, section 6.12.10 - Async Copies from Global to Local Memory...
The Khronos Group 11/18/2024 ASYNC_WORK_GROUP_STR(3clc)
See Also
asyncCopyFunctions(3clc), wait_group_events(3clc)
Specification
OpenCLSpecification[1]
