Hello,
this is only default tuning (-mtune, not -mcpu). Linux also does similarly in
linux64.h:
74 #undef PROCESSOR_DEFAULT
75 #define PROCESSOR_DEFAULT PROCESSOR_POWER7
76 #undef PROCESSOR_DEFAULT64
77 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER8Although there is hard to explain (for me) setting to tune for POWER7 on 32-bits. POWER7 is 64-bit and it should be more reasonable to optimize for the last 32-bit machines that still may be in use (so G4). That said, on the 64-bit front, we will just match the Linux setting. On 20-12-13 08:23:53, Segher Boessenkool wrote: > On Sun, Dec 13, 2020 at 01:10:58AM +0100, Gerald Pfeifer wrote: > > Piotr is the one spending most times on ensuring FreeBSD ports work > > fine on POWER, so personally I'm happy to follow his recommendation > > on such matters. > > I have a question though: > > > -/* Until now the 970 is the only Processor where FreeBSD 64-bit runs on. > > */ > > #undef PROCESSOR_DEFAULT > > -#define PROCESSOR_DEFAULT PROCESSOR_POWER4 > > +#define PROCESSOR_DEFAULT PROCESSOR_PPC7450 > > #undef PROCESSOR_DEFAULT64 > > -#define PROCESSOR_DEFAULT64 PROCESSOR_POWER4 > > +#define PROCESSOR_DEFAULT64 PROCESSOR_POWER8 > > Is this wise? Binaries won't run on many BE systems anymore with > this. (Linux still uses Power4 by default for BE, as well). > > In either case: yes, whatever you guys decide here is fine. Also for > all backports you want. Thanks! > > > Segher
signature.asc
Description: PGP signature
