Hey again,
I forgot to say; this commit was taken out of Intel's clang patch. All
credit goes to Guy Benyei and his team, and thanks to him for letting me
commit this piece of it.
Thanks,
Fraser
On 29/09/14 10:54, Fraser Cormack wrote:
Hi,
This patch allows an explicit cast from the literal 0 to an event_t.
The fact that you can use 0 as an event_t is in Section 6.12.10 of the
OpenCL 1.2 specification. The use of an explicit cast is used in the
async_copy* kernels in the 'basic' subtest of the conformance test suite:
__kernel void test_fn( const __global short8 *src, __global short8 *dst,
__local short8 *localBuffer, int
copiesPerWorkgroup, int copiesPerWorkItem )
{
int i;
for(i=0; i<copiesPerWorkItem; i++)
localBuffer[ get_local_id( 0 )*copiesPerWorkItem+i ] =
(short8)(short)0;
barrier( CLK_LOCAL_MEM_FENCE );
for(i=0; i<copiesPerWorkItem; i++)
localBuffer[ get_local_id( 0 )*copiesPerWorkItem+i ] = src[
get_global_id( 0 )*copiesPerWorkItem+i ];
barrier( CLK_LOCAL_MEM_FENCE );
event_t event;
event = async_work_group_copy((__global
short8*)(dst+copiesPerWorkgroup*get_group_id(0)),
(__local const short8*)localBuffer,
(size_t)copiesPerWorkgroup,
** HERE ** >>>> (event_t)0 );
wait_group_events( 1, &event );
}
I've also added a test for this behaviour.
Cheers,
Fraser
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