On 10/10/2014 10:21 AM, Jeff Law wrote: > On 10/10/14 11:04, Jakub Jelinek wrote: >> On Fri, Oct 10, 2014 at 11:00:54AM -0600, Jeff Law wrote: >>> 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. >> >> Can be addition or bitwise or, as high should have some low bits zero, both >> usually work the same. > It can be bitwise-or on some architectures...
Just to be clear, the LOW rtx code I mentioned upthread was for illustration purposes only. I only intend to change the rtx class of the existing LO_SUM. :-) r~
