OtpR8B loops on configure

[Mikael Pettersson]

Bruce Fitzsimons writes:
 > Thanks Mikael,
 > 
 > > I would suspect a hardware or software problem specific to your machine.
 > > I have a test box with a similar configuration (233MHz Pentium MMX,
 > > RedHat 6.2), and it has no problem with the test for unreliable f.p.
 > > exceptions. (They're reliable.)
 > Weird. I will have to think if I have changed anything. Did this FP
 > exception code exist in R7B or is it new with HiPe/R8B?

It's new in R8. It's used to improve performance for f.p. intensive
code by avoiding a large number of usually pointless error checks.
If I remember correctly, it gave a 10-20% speedup or so on pseudoknot.

/Mikael