On 2007-12-20 17:59:25 +1100, Joshua Root wrote: > [1] <http://lixom.net/~olof/64bit-perf.pdf> > [2] <http://www.geekpatrol.ca/2006/09/32-bit-vs-64-bit-performance/>
I don't understand why they say that 5 instructions are needed for constants in 64-bit binaries. Can't the PowerPC load the constant from the memory with a single instruction? This is the solution chosen on the ARM for complex constants (if they are in the cache, this should be fast enough). But many constants are simple enough to be loaded with a single instruction (on the ARM, these are 8-bit values rotated by an even number of positions), in particular after optimizing the code. -- Vincent Lefèvre <[EMAIL PROTECTED]> - Web: <http://www.vinc17.org/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/> Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon) _______________________________________________ macports-users mailing list macports-users@lists.macosforge.org http://lists.macosforge.org/mailman/listinfo/macports-users
