Missing Ops

[Leopold Toetsch]

While playing with YAL (Yet Another Language) I'm discovering a lot of 
asymmetries in ops files:

neg_p is missing (neg_p_p only, but neg_i is there)
mod_p_p_i, mod_p_p_n  are missing (add, sub, ... have these variants)
keyed assign ops are missing (set only)
The question is what to do:
1) should these ops just be implemented or
2) should the assembler work around missing ops
3) should each HLL work around missing ops
leo