Johan Råde wrote:
Boris Gubenko wrote:
As Markus pointed out, it is not the processor itself: one needs to compile -ieee in order to get full support of ANSI/IEEE Standard 754-1985.
For your library, compiling with cxx on Tru64 without -ieee makes little sense. Likewise, on AlphaVMS, it should be compiled /float=ieee/ieee=denorm. On iVMS, i.e. VMS on ia64, the full support for IEEE features is on by default.
It should still be meaningful to use the library without -ieee. If there are no infinities and no NaNs, then the functions isinf and isnan should always return false.
Let me rephrase that: The library should produce correct results, regardless of compiler flags. Whether the library is useful or not, with certain compiler flags, is up to the user to decide. --Johan