review (S) for 6849984: Value methods for platform dependent math functions constant fold incorrectly

[Christian Thalinger]

On Thu, 2010-01-14 at 09:45 -0800, Vladimir Kozlov wrote:
> > Maybe I missed the point of this change, but why are we using the much
> > more complicated C versions for these?
> > 
> > +     // The intrinsic version of these seem to return the same value as
> > +     // the strict version.
> > +     StubRoutines::_intrinsic_exp = SharedRuntime::dexp;
> > +     StubRoutines::_intrinsic_pow = SharedRuntime::dpow;
> 
> There is no implementation of ExpD and PowD in x86_64.ad (which is surprise - we missed it???)
> And it is also complex code - see it in x86_32.ad

Tom just explained it to me on the phone (I try to summarize):  What I
missed is that these new intrinsics are used in the compiler to do
constant folding and aren't used during runtime.

-- Christian