[cfe-dev] __builtin_nan support

[Neil Booth]

Nate Begeman wrote:-

> >
> >
> > +      llvm::APInt Val(64, 0x7ff8000000000000ULL, false);
> > +
> > +      char *endp = 0;
> > +      uint64_t Significand = strtoull(data, &endp, 0);
> >
> > Windows doesn't have strtoull.
> 
> What's the suggested replacement?

I suggest you make a constructor in APFloat to take this kind of
input, rather than indirecting through APInt.  It can already
convert decimals very efficiently (used for decimal->binary) and
then you nail the long-double case too, without stroull and friends.

Neil.