[PATCH] [mips] Add the SoftFloat MipsSubtarget feature.

[Matthew Fortune]

> > In general the .set options are supposed to be as independent as
> > possible  there is unfortunate historic entanglement in binutils which
> > means that  we have to allow .set mips<blah> to automatically set gp
> and fp defaults.
> >  However, with fp=xx I believe the behaviour is that .set mips<blah>
> > does not force a specific fp setting when the current value is xx. The
> > other .set options only update one feature even if that produces a
> > slightly unusual overall configuration.
> >
> > Thanks,
> > Matthew
> 
> 
> So this behaviour changes between fp=xx and other fp values? We'll need
> to look into that but I think it's something for a follow-on patch.

Yes, that's correct.

Matthew