MIPS64 soft-float: missing definition for __floatdidf and friends

[Adam Nemet]

Richard Sandiford writes:
> Perhaps I'm going over old ground here, but do we really want to
> cut-&-paste bits of libgcc2.c like this?  The templates there are
> fine (and indeed Adam's versions seem to be copied from there, with
> appropriate macro substitutions).

Yes but this seems to be the approach Roger had taken in his original
patch which you have positively commented on.  But anyway the problem
of duplicate DI conversion routines for MIPS32 seems to a be a real
one and it is probably easier to deal with that in libgcc2.c where the
definition of MIN_UNITS_PER_WORD is available.

Let me see if I can come up with a patch and then we'll decide if that
is safe for the 4.1 release branch.

Adam