On Fri, Aug 12, 2016 at 11:37 AM, Param Hanji <param.catchch...@gmail.com>
wrote:
> Great, thanks for the info. I think I've figured out the issue, namely the
> improper use of pointers at some places. Fixing this brought up some other
> issues. Suppose I have partitions defined as below:
>
> struct partition {
> seg *pt_inseg;
> hit *pt_inhit;
> ...
> }
>
> And my kernel function is:
> __kernel void weave(global struct *segs, global uint *h,
> global partition *parts, ...)
> {
> size_t id = get_global...;
> global struct partition *pp = &parts[h[id]];
> pp->pt_inseg = &segs[h[i]];
> ...
> }
>
> The above snippet produces an error claiming 'conversion from address
> space "global" to "private" is not supported' (last line). But parts and
> segs are both global right, which means such an error shouldn't occur.
>
The problem that causes the error is that pp->pt_inseg is type 'seg *'
while &segs[h[i]] is type 'global struct *'. The type in the argument
should be 'global seg *' and you probably need to declare the pointer
fields in struct partition e.g. 'pt_inseg' with the 'global' qualifier as
well.
--
Vasco Alexandre da Silva Costa
PhD in Computer Engineering (Computer Graphics)
Instituto Superior Técnico/University of Lisbon, Portugal
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