This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: GCC and fast eveluaton of polynomials


<<That's really too bad!  It looks like the second version will defeat
some optimizations, which would mean that writing it that way
actually prevents the compiler from making a mess of it.  Please
mention what brand of computer you are using.  If you give a complete
test case in the form of a bug report, maybe someone will investigate.
>>

It is certainly familiar that Horner's rule is a bad idea on modern 
processors with significant ILP. That's nothing new. 


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]