Performs an async gather of num_elements gentype elements from source to destination.
event_t async_work_group_strided_copy(__local gentype *dst,
const __global gentype *src,
size_t num_gentypes,
size_t src_stride,
event_t event)
event_t async_work_group_strided_copy(__global gentype *dst,
const __local gentype *src,
size_t num_gentypes,
size_t dst_stride,
event_t event)async_work_group_strided_copy performs an async gather of num_gentypes gentype elements from src to dst.
The src_stride is the stride in elements for each gentype element read from src.
The async gather is performed by all work-items in a work-group and 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.
This rule applies to ND-ranges implemented with uniform and non-uniform work-groups.
Returns an event object that can be used by wait_group_events 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 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.
async_work_group_copy and async_work_group_strided_copy for 3-component vector types behave as async_work_group_copy and async_work_group_strided_copy respectively for 4-component vector types.