Re: MKSOFTFLOAT for evbppc

[Simon Burge <simonb%NetBSD.org@localhost>]

Matt Thomas wrote:

> > (Also, for the port page: does fp emulation via traps work?  Or is
> > MKSOFTFLOAT the only way that can possibly work?)
> 
> Within the past 4 months or so, I added emulation of the FPU so you can
> run without MKSOFTFLOAT=yes.

It looks like we've still got the same FPU emulator from the Walnut
(405GP) days.  Way back when (2001?), softfloat was orders of magnitude
faster on a Walnut.  There's the timings for an awk command issued
during a kernel build at the time:

        emulate:       113.554u 2778.750s 52:30.75 91.7%
        softfloat:       7.607u    1.447s  0:10.57 85.5%

This was the only reason we did softfloat at the time.

Cheers,
Simon.