https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108279
--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
__attribute__((noinline, optimize ("rounding-math"))) static int
round_to_nearest (void) { return 1.0f - __FLT_MIN__ == 1.0f + __FLT_MIN__; }
and
if (round_to_nearest ()) \
_fcw = FP_RND_NEAREST; \
else \
__asm__ __volatile__ ("%vstmxcsr\t%0" : "=m" (_fcw)); \
Except that from _fcw we don't determine just the rounding mode but also what
exceptions are enabled.
