On Mon, 2010-10-25 at 21:27 -0400, Adam Goode wrote: > On 10/25/2010 07:31 PM, Dennis Gilmore wrote: > > Id like to have00079ca0-0130hat we need to do to support both software > > floating > > point and hardware floating point support. > > I had been under the impression that all we would need to do is to build > > glibc > > with hardfp support. however that may not be the case. and we may need > > to > > build everything with hardfp support. > > > > this is just to get discussion rolling > > > > See this thread for a little context: > http://cygwin.com/ml/libc-ports/2009-04/msg00020.html > > Basically, soft floating point on ARM is done with helper functions. By > default, these are statically linked in, but they do not need to be. If > you dynamically link in the aeabi floating point helper code (basically > libgcc) and have a multilib glibc, then there is the ability to have > softfp binaries that can take advantage of hardfp when available. These > binaries will be slower than real hardfp binaries though. And it is not > clear that multilib alone is sufficient, it may be that the new IFUNC > stuff is really needed for good performance across different VFP variants. > > > Adam
Of the devices I've seen so far, the armv5 devices have all been softfp, and the armv7 devices have been hardfp. Are there any widely-used exceptions to this pattern? -Chris _______________________________________________ arm mailing list [email protected] https://admin.fedoraproject.org/mailman/listinfo/arm
