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> except you can have up to 16 of them
Yes, those previous talks are the reason I have this question. If you already can supply an instruction with an arbitrary number of inputs up to 16, why do you need a special mechnaism for other instructions to provide more then 2 inputs?
Could just be an encoding issue. The 2 operand case is by far the most common for all instruction except call. The new belt for the callee is invisible to the caller anyway, so from the callers belt perspective it should be irrelevant whether arguments are provided in an argument list or with additional arg-operations. The caller doesn’t care that in one case the arguments are combined in one case in a new belt and in the other case in internal data paths. It doesn’t see either. All it sees are the eventual results.