Subject: Re: VFP support?
To: Chris Gilbert <firstname.lastname@example.org>
From: Matt Thomas <email@example.com>
Date: 09/12/2007 19:37:15
On Sep 12, 2007, at 4:19 PM, Chris Gilbert wrote:
> Matt Thomas wrote:
>> I have a few ARMs with real VFP. What is the state of VFP support in
>> Does it work? Should it work?
> I don't think it's supported at the moment, I don't remember anyone
> adding code to save the VFP regs on a context switch which is probably
> the main bit of kernel work needed.
> gcc appears to have vfp support as a vfp file does exist:
> possibly enabled by using:
> Also I note that sys/arch/arm/include/float.h has some #ifndef
> Is it a full vfp implementation, or is it like the original floating
> point where the some instructions are in hardware, and some are
> So I guess it's been thought about, but as your possibly the first
> person with a VFP capable chip you get the fun of making it work :)
It's a full implementation as far as I can tell.