Mill Computing, Inc. › Forums › The Mill › Tools › Compilers › C semantics and the Mill › Reply To: C semantics and the Mill
December 8, 2017 at 6:08 am
Post count: 25
Thanks. I think that that behaviour is what most C programmers subconsciously expect out of the “<<” operator.
You mentioned the cost of “or-trees” in another thread. I suppose that the same or-tree used for saturating shifts is also used for the other shifts.
Putting an “and” before a “shiftlu” would be less instructions than the other way around for sure.
BTW, don’t widening instructions always widen? What about vector ops that would drop two elements on the belt?