> That's a reasonable decision, but it is actually used at least ten times > as much as everything else put together, possibly a hundred times as much.
I believe we are in pretty different parts of the community. Around me I rarely see it used, while people check for nans, infinities, and exception flags often. Also, aborting on certain floating-point exceptions is widely used as a debugging aid. > However, it is used in the form of selecting hard underflow using a > compilation option, and not within the program. You certainly DO have > targets where it would work, even dynamically within the program, and I > think that it could be done even on x86. That isn't the same as it > should be done, of course! Indeed, 387/SSE has flush-to-zero modes. But other APIs do not (glibc, SysV, AIX). I’m perfectly willing to add it, especially to 387/SSE, if given a bit of help (someone to write the assembly code). Thanks for your feedback, FX
