On 10/10/14 10:52, Richard Henderson wrote:
I missed that message. Interesting.
I wonder what kind of fallout there would be from changing LO_SUM to
RTX_BIN_ARITH, which is what it should have been all along.
My guess is that someone looked at HIGH being RTX_CONST_OBJ and thought that
LO_SUM should also be a kind of object too.
Most likely. One could even make an argument that LO_SUM should be a
constant, but that's a more intrusive change.
But it's really a lot more like a
kind of PLUS. If instead we had a LOW to match HIGH it would have been
Right. In fact, I believe at the hardware level it's typically
implemented as addition.
Jeff
