Synopsys:
srefia
Given a struct and an index, push 1 if the field occupying the position specified by the index in the given struct is absent. Push 0 otherwise. If the struct doesn’t have that many fields, raise PVM_E_OUT_OF_BOUNDS.
Stack: ( SCT ULONG -- SCT ULONG INT )
Exceptions: PVM_E_OUT_OF_BOUNDS