------- Comment #2 from gunnar at greyhound-data dot com 2008-06-10 16:02 -------
> Note that > > cmp.l #65535,%d0 > jbhi .L10 > > can be replaced with > > swap %d0 > tst.w %d0 > jbne .L10 > > A similar trick can be applied to signed comparisons as well. But this "trick" will run slower on the higher 68k CPUs. On 68040 or 68060 or SuperScalar Coldfire its better to generate less instructions that do not have dependancies. I think "cmp.l #65535,%d0" is the code that should be generated by "O2" as its faster on many 68K models. The shorter two instruction trick might be an option for compile optiont "Os" Kind regards Gunnar von Boehn -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25128
