Quoting "C.M. Connelly" <[EMAIL PROTECTED]>: > > My housemate was discussing compiler performance on the Darwin > list yesterday, and wrote a couple of quick programs (in C) to get > some numbers. (Someone had asked about the performance of code > compiled with -O3 optimization under gcc versus code compiled with > CodeWarrior.) > > We were surprised that the performance of our two PowerPC machines > (a 132 MHz 604e PowerCenter and a 225 MHz 604e PowerTower Pro) was > amazingly bad compared with that of our dual-Pentium 133 MHz > machine (usually it's just the opposite). > > My housemate then did a search for ``PowerPC math library > Motorola'', and found libmoto.a, an optimized math library created > by Motorola back in 1996, and released under a free-as-in-beer > license (only as object code, and with license restrictions on > redistribution).
I found another from IBM this time: http://www.rs6000.ibm.com/resource/technology/MASS/ I've not tested it whatsoever, so I don't know about performances, but they contains a few functions not in libmoto.a sqrt, rsqrt, exp, log, sin, cos, tan, atan, atan2, sinh, cosh, tanh, dnint, x**y <snip> > > The problem for Debian, of course, is the license and the lack of > source code. Things have changed a lot since 1996, and I wonder > if Motorola might be more sympathetic to the idea of opening up > the source code for the libmoto. Ideally, the Motorola code could > be integrated into the glibc math library, replacing the old, > unoptimized functions. Have you contacted them ? I think you would have better luck with IBM open-sourcing their library, than Motorola. Please test the IBM lib, and tell us your results. /Hadess http://hadess.net
