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RE: Accessing signgam from the middle-end for builtin lgamma
On Thu, 26 Apr 2007, Dave Korn wrote:
> On 26 April 2007 16:26, Brian Dessent wrote:
>
> > The builtin would run on the host at compile time, whereas the above
> > would run on the target at runtime. I presume he's talking about using
> > MPFR in the host compiler to simplify lgamma(constant), not actually
> > causing any requirement on the target code to use or have MPFR.
>
> Oh, that makes sense.
Yes, see:
http://gcc.gnu.org/gcc-4.3/changes.html#mpfropts
> Kaveh, surely the answer is to just unconditionally emit something like
>
> (set (mem (sym_ref "_signgam")) (const_int VALUE)))
>
> and let the user worry about what happens if they haven't included the correct
> header file?
I'm doing this at the tree level, so AIUI I have to be mindful of type,
scope and conflicts. I also have to decide what to do in non-C.
--Kaveh
--
Kaveh R. Ghazi ghazi@caip.rutgers.edu