D-Programming-Language/phobos — comment on commit 8cfc0d232bbd606781d56713f7591fd79204a949
File:  line 0
By donc:

By the way -- with 80 bit reals on the x87, the behaviour on AMD is different to Intel! AMD converts signalling to quiet, Intel does not (or maybe the other way round, I don't remember). So it's not even as predictable as an SSE/x87 difference.