Todd Vierling said:

>Oh, I'm sure there's boost, but I'd be curious to see an analysis.  The
>speed difference between mul/div on v7 and v8 is *huge*.

>The sparc compiler, in the v7 default mode, emits a call to
>.[u]{mul,div,mod} for the corresponding mul/div instructions; these
>functions can be replaced by the v8 instruction and a RET, without even
>needing a save/restore.  You get most of the speedup without having to
>recompile the whole shebang.

According to the GNU docs, there is also some instruction reordering as
well as inclusion of the instructions above when using -mcpu=v8.

-- 
Rick Kelly  rmk@rmkhome.com  www.rmkhome.com