Re: CVS commit: src/lib/libm

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

riastradh@ wrote:

> Interesting, thanks, so that means we don't have any automatic builds
> (let alone tests) of m68k MKSOFTFLOAT=yes?

Currently no m68k architecture that use softfloat by default,
so MKSOFTFLOAT is optional.

> Is this configuration
> relevant for real-world hardware or is it more of a `for fun' option?

The only use case is to run NetBSD/mac68k on XC68LC040 machines.

It looks he "options FPU_EMULATE" for m68k doesn't handle
XC68LC040 errata properly so most FP programs randomly dumps core
on it (though FPU_EMULATE works on rare MC68LC040).

In the real world only several Machintosh machines (LC630 etc.)
were shipped with XC68LC040 and users of such machines want
softfloat, but most such geek users just replaced LC040 with 68040.

I have LC630 with MC68LC040 and HP9000/382 with (replaced) XC68LC040
to debug FPU_EMULATE on LC040, but it has been in my deep todo list..

> Maybe we should have an m68k MKSOFTFLOAT=yes autobuild?

We can do it, but IIRC there were several discussions if we provide
softfloat m68k binaries maybe we should define a differnt MACHINE_ARCH.

---
Izumi Tsutsui