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Re: [3.4-BIB] Add trunc/round/floor/ceil/rint builtins II
> On Wed, Nov 06, 2002 at 03:31:48PM -0800, Dale Johannesen wrote:
> > This is what C90 says:
> > floor[lf] ceil[lf] are reserved:
> > "The names of [floor and ceil], suffixed with f or l, are reserved
> > respectively for corresponding functions with float and long double
> > arguments and return values."
> > But implementing such functions is not required. I'd read this to
> > say you can implement them if you want to.
> What it means is that we can't make __builtin_floorf call
> floorf if the backend doesn't implement the pattern though.
> I think.
We can, when __builtin_floorf has undefined behaviour, we can do
anything we like to.