Hello, On Fri, Jan 16, 2015 at 3:05 AM, J. Tang <[email protected]> wrote:
> > On 2015-01-15, at 04:06, Mike Looijmans <[email protected]> wrote: > > > -2- The CPU doesn't actually have floating point support and the kernel > is emulating it for you. This allows the platform to run "hf" binaries, at > a minor performance cost compared to completely doing the emulation in user > space (libc). > > From my understanding, the Raspberry Pi (at least the model B, which is > what I have) has an FPU. > > Would it hurt to at least mention in the top-level README of the > meta-raspberrypi layer that a user could enable hard FP by setting the > DEFAULTTUNE? > > Definitely it wouldn't. But right now we have two options: We can just throw a README line and that's it. Or we can investigate a little to see if in our current setup we actually use FPU instructions or not. Following Mike's answer I would definitely think that we are in case 1 where the compile based on the CPU configuration figures out that we can use FPU instruction on this CPU architecture. Right now, as being on vacation, I can really test on binaries by dissembling code and check it by hand. Anybody who can do it and provide some feedback? As well, some bench-marking would really make sense here. Thanks guys. -- *Andrei Gherzan*
-- _______________________________________________ yocto mailing list [email protected] https://lists.yoctoproject.org/listinfo/yocto
