Description
prefetch prefetches
num_gentypes * sizeof(gentype) bytes into
the global cache. The prefetch instruction is applied to a work-item in a work-group
and does not affect the functional behavior of the kernel.
The generic type name gentype indicates the built-in data types char, char{2|3|4|8|16}, uchar, uchar{2|3|4|8|16}, short, short{2|3|4|8|16}, ushort, ushort{2|3|4|8|16}, int, int{2|3|4|8|16}, uint, uint{2|3|4|8|16}, long, long{2|3|4|8|16}, ulong, ulong{2|3|4|8|16}, float, float{2|3|4|8|16}, or double, double{2|3|4|8|16} as the type for the arguments unless otherwise stated.
When extended by the
cl_khr_fp16 extension,
the generic type gentypen is extended to
include half, half2, half3, half4,
half8, and half16.
The kernel must wait for the completion of all async copies using the
wait_group_events built-in function before
exiting; otherwise the behavior is undefined.
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