https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87832
--- Comment #9 from Jan Hubicka <hubicka at ucw dot cz> --- > > Do you mean we should fix modeling of divisions there as well? I don't have > latency/throughput measurements for those CPUs, nor access so I can run > experiments myself, unfortunately. > > I guess you mean just making a patch to model division units separately, > leaving latency/throughput as in current incorrect models, and leave it to > manufacturers to correct it? Alternatively, for AMD Bobcat and Bulldozer we > might be able to crowd-source it eventually. Actually for older cores I think the manufacturers do not care much. I still have a working Bulldozer machine and I can do some testing. I think in Buldozer case I was basing the latency throughput on data in Agner Fog's manuals. How do you test it? Honza
