Hi fortunately, no, I don't need double branch here. "cmpvs reg0, reg0" is a conditional instruction, which only executes if the v flag is set.
My proposal would be to add a new DoubleCondition called DoubleEqualOrNAN, or something similar to clarify what we expect from the conditional branch. Since I feel (and by IEEE as you mentioned) a comparison to NaN should be false, not true as x86 actually does. Zoltan >> unfortunately cmf was used by the old fpa (floating point >> accelerator), >> which is replaced by vfp (vector floating point) for some time. >> Perhaps I >> can try a "cmpvs reg0, reg0" instruction, which sets zero flag if one >> argument is NaN (since reg0 is always equal to reg0). Otherwise it >> does >> nothing (=nop). > > That should work, but it would require two branches instead of one > (compare to 0, compare to self). > > I'm sure there must be a way to do an IEEE double comparison on ARM > with only one branch. > > Geoff _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev