On Thu, 2 Dec 2004 00:24:30 +0000 (GMT) "Maciej W. Rozycki" <macro@xxxxxxxxxxxxxx> wrote: > On Thu, 2 Dec 2004, Thiemo Seufer wrote: > > > If 64bit kernels are ever relevant for VR41xx, you might want to use > > the same branch trick as it is used for R4[04]00. IIRC it reduced the > > handler size from 34 to 30 instructions, saving another branch. > > Isn't that based on specific properties of the R4[04]00 pipeline? It may > still work for the VR41xx, but you can't take it for granted, so it should > be double-checked. Given the conditions it's probably worth the hassle, > though. The specification of VR41xx does not have the guarantee to the branch trick. Furthermore, VR41xx has the NEC original pipeline. I think that the present method is exact for VR41xx. Yoichi
