Re: Linux 3.10-2-m68k FPU support

[Geert Uytterhoeven <geert@linux-m68k.org>]

On Mon, Nov 18, 2013 at 10:35 AM, Andreas Schwab <schwab@linux-m68k.org> wrote:
> Finn Thain <fthain@telegraphics.com.au> writes:
>> On Sun, 20 Oct 2013, Andreas Schwab wrote:
>>> Michael Schmitz <schmitz@biophys.uni-duesseldorf.de> writes:
>>> > Even for 030, I cannot recall specific instructions that are
>>> > unimplemented or dodgy.
>>>
>>> None of the trigonometric or logarithmic insns are implemented (grep for
>>> uprint).
>>
>> If anyone wants to get them working, there's a freely-distributable double
>> precision implementation at http://www.netlib.org/fdlibm/
>
> The FPU is using extended precision.

But we do have implementations of the trigonometric and logarithmic insns
in arch/m68k/fpsp040, albeit directly using other FPU insns, for which we do
have emulation code?

Perhaps we can write some asm macros for simple FPU instructions,
calling into the existing emulation code for simple FPU instructions, and
just include e.g. arch/m68k/fpsp040/slogn.S?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds