> Yes, SPECfp. And no, I don't think they enable trap-on-FP-exceptions but > they may cause exceptional behavior even if -fno-trapping-math is specified > (not sure if IA64 masks exceptions on the comparisons?)
The manual says that QNaNs signal Invalid for the signaling FP comparison operators and that you need to enable the Invalid Operation trap to get a fault from Invalid. The IEEE standard also says that comparisons by way of unordered signaling predicates raise the "invalid operation exception", just like the regular operations. That being said, I can double-check. -- Eric Botcazou
