ARM linux mailing lists FAQ about floating point support.
nico at cam.org
Thu Sep 10 17:25:59 EDT 2009
On Thu, 10 Sep 2009, Laurent Desnogues wrote:
> On Thu, Sep 10, 2009 at 11:03 PM, Nicolas Pitre <nico at cam.org> wrote:
> > On Thu, 10 Sep 2009, Gilles Chanteperdrix wrote:
> >> Right, it does not work, so, what does:
> >> "Allows the mixing of softfloat and hardfloat code"
> >> is supposed to mean here for instance:
> >> http://www.eurotech-inc.com/embedded-eabi-linux.asp
> > As I just posted, it looks like gcc only implemented the soft-float ABI
> > when using VFP. So if your CPU is VFP capable then using
> > -mfloat-abi=softfp should produce actual VFP instructions while still
> > passing function arguments around using non VFP registers.
> Didn't latest CodeSourcery ARM toolchain (2009q1) add hardfp?
I don't know. If so then the FAQ entry about not being able to mix
hard-float and soft-float would still apply when using that mode.
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