On 11/30/21 11:51 AM, Qing Zhao wrote:
> So, looks like that the variable with OPAQUE_TYPE cannot be all explicitly
> initialized even at source code level.
>
> The only way to initialize such variable (only __vector_quad, not for
> __vector_pairs) at source code level is through call to
> __builtin_mma_xxsetaccz as:
>
> void
> foo (__vector_quad *dst)
> {
> __vector_quad acc;
> __builtin_mma_xxsetaccz(&acc);
> *dst = acc;
> }
>
> Is this the correct understanding?
Correct. Or via...
> Is there way to initialize such variable to other values than zero at source
> code level?
Not for any constant values. You can load it from memory though like below,
which is also allowed for __vector_pair:
void
foo (__vector_quad *dst, __vector_quad *src)
{
__vector_quad acc;
acc = *src;
...
}
void
bar (__vector_pair *dst, __vector_pair *src)
{
__vector_pair pair;
pair = *src;
...
}
We do not accept things like:
acc = 0;
acc = {0, 0, ... };
etc.
Peter
