[linuxsh-dev] Re: FPU in kernel (SH-4)

[Masahiro A. <m-...@aa...>]

I may not be clearly understanding your point but I would like to note...

On Sun, 5 Aug 2001 17:26:12 +0900 (JST)
NIIBE Yutaka <gn...@m1...> wrote:

> Honestly speaking, I couldn't find a good way to extend current
> implementation to general kernel FPU support (more than one kernel
> task uses FPU).  If we really need this, I think that it is good 
> design general one rather than extending current one.
> 
> Comments?  Opinions?  Does anyone have driver which uses FPU?

RTLinux for SH4 uses FPU. Or more precisely, real-time task running
under rtlinux can use fpu. There can be more than one task running
simultaneously.

I'm taking Summer break now and my brain stopped working ^^;), but I
would like to say that:
1) it would be good if linux-sh kernel can handle fpu issues correctly,
even if it is compiled with -m4 (without -m4-nofpu option).
2) if it is not possible, rtlinux patch should take care of that.
3) or, I (or somebody) should contribute to what Niibe-san is concerned
about now.

Here is my opinion. I'll revisit this issue when I get back to work.

-- 
Masahiro ABE, A&D Co., Ltd.