From: Richard Henderson <r...@redhat.com> Date: Thu, 06 Oct 2011 10:47:28 -0700
> You've said that POPC only operates on the full 64-bit register, > but I see no zero-extend of the SImode input? Similarly for > the clzsi patterns. Thanks for catching this. I guess if I emit the zero-extend, the compiler will eliminate it if possible. This is another reason why I want to do v8plus differently. The compiler would take care to optimize away zero and sign extensions instead of how we use that sparc_check_64 () thing now. > If it weren't for the v8plus ugliness, it would be sufficient to > only expose the DImode patterns, and let optabs.c do the work to > extend from SImode... Understood.
