HelenOS sources

FE_TONEAREST       39 uspace/lib/c/include/fenv.h #define fegetround() FE_TONEAREST
FE_TONEAREST      156 uspace/lib/math/generic/nearbyint.c 	case FE_TONEAREST:
FE_TONEAREST      177 uspace/lib/math/generic/nearbyint.c 	case FE_TONEAREST:
FE_TONEAREST       39 uspace/lib/posix/include/libc/fenv.h #define fegetround() FE_TONEAREST
HelenOS homepage, sources at GitHub