roy rosen <roy.1ro...@gmail.com> writes: > I am trying to demonstrate my port capabilities. > I am writing an application which needs to use instructions like max > a,b,c,d,e,f where a,b,c are inputs and d,e,f are outputs. > Is that possible to write an intrinsic function for that? > I think not because that means that I need to pass d,e,f by reference > which means that they would be in memory and not in a register as > meant by the instruction.
That is correct. An intrinsic function is a normal function. If you want it to have multiple outputs, you need to pass in addresses, or you need to have it return a struct. I'm a bit curious as to why a function named max would have multiple outputs. > Is there any port with such an example? Not to my knowledge. I wrote a private port in which some intrinsics returned a struct, and to keep everything out of memory I added additional intrinsics to retrieve elements of the struct. It's awkward to use but the resulting code is fine. > So, I thought of implementing that with inline assembly but here I > encounter a different problem: The compiler does not understand the > instruction given in inline assembly and therefore it does not > parallelize it with other insns. Yes. > Is there any other solution for that which I don't see? I can't think of anything. Ian
