[stephencanon]

None of the relevant standards say anything about how math functions are supposed to behave in the non-standard DAZ/FTZ modes (because they're non-standard). The second you set the bit, you step off the path of being able to complain about any behavior not documented by the library.

[an1sotropy]

Right - it's a bit like saying "some more undefined behavior please!" and then being surprised at being surprised.