On Thu, Sep 05, 2002 at 06:16:49PM +0200, Maciej W. Rozycki wrote: > On Thu, 5 Sep 2002, Daniel Jacobowitz wrote: > > > N32 supports saving and restoring 64-bit registers, which O32 doesn't - > > according to some comments in GCC, O32 is in fact incompatible with > > using 64-bit operations. > > But that old software wouldn't benefit as it didn't perform 64-bit > operations unless manually coded in software using narrower data types. > There is no 64-bit C data type for o32 and long long is quite a recent > invention -- it didn't exist in the 80s or even early 90s. Right. You don't recompile and get a magic bullet speed improvement (well, you do, but not a drastic one I think); but you don't recompile and get a magic bullet binary incompatibility either. Then you add 64-bit pieces by hand as necessary. That's my understanding anyway. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer
