>>>Also, it's perfectly fine for a coordinated group of PMCs (like, say,
>>>the ones that provide perl's base scalar behavior) to share grubby
>>>internal knowledge, though I'd like to keep that under control, as it's
>>>easy to get out of sync.
Ok, now that I'm looking closer, it appears my optimization might be broken,
depending on assumptions.
void subtract_int (INTVAL value, PMC* dest) {
dest->cache.int_val = SELF->cache.int_val - value;
}
Would be broken if we did
sub P0, P1, 5
and P0 wasn't a PerlInt.
I think the common case is:
sub P0, P0, 5
which is basically
dec P0, 5
but we don't currently only have dec/inc for INT and NUM, not PMC. Not good.
Maybe my optimization was well-intended but mis-placed.
-Melvin
