On Aug 29, 2012, at 08:35, John Gilmore wrote: > > More generally, while IBM's efforts to optimize instruction sequences > that it finds frequently in its code samples are unambiguously > praiseworthy, I am more doubtful about systematiic attempts to exploit > them. Its C-and-PL/I optimization machinery greatly mitigates the > unfortunate consequences of a number of dubious coding practices in > these languages; but the availability of these optimizations is not, > finally, an argument for adopting the bad coding practices these > optimizations address. > Is there any sort of cookbook cataloguing instruction( sequence)s that have been so optimized?
Of course this becomes obsolete with the next hardware iteration. -- gil
