We're out of tree codes; now what?

Richard Kenner kenner@vlsi1.ultra.nyu.edu
Mon Mar 12 21:52:00 GMT 2007


> It's going to have a big performance impact. To extract a 9-bit value,
> the compiler will need to do a lot of masking every time it accesses
> the TREE_CODE.

"a lot masking" means at most two additional instructions, one if we
put it in the right place.  I'd be shocked if we could even measure
this, let alone be a "big" performance impact.



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