Cedric Roux <cedric.roux@xxxxxxxxxx> writes: > Andrew Haley wrote: >> That is strange. A bit of debugging would be required to understand >> why that happens. > > (...) > > The least significant bit differs. Now the question remains whether this is a bug in gcc or not. The document http://www.validlab.com/goldberg/paper.ps (Numerical computation guide) linked from http://gcc.gnu.org/bugs/ states " Many programmers may not realize that even a program that uses only the numeric formats and operations prescribed by the IEEE standard can compute different results on different systems. " Are AMD and Intel x86-64 processors different systems? Even if they are it might be possible to get rid of this inconsistency.
