FLT_ROUNDS

The current rounding direction as C’s FLT_ROUNDS reports it.

What you get back

1 for round-to-nearest, which is the default. The other values are 0 toward zero, 2 toward +infinity, 3 toward -infinity.

Differences from upstream

None. FLT_ROUNDS is a FUNCTION here, not a constant, because it is one upstream too: it takes no arguments and raises a usage error if given any, and its value tracks fesetround instead of being fixed once and for all.