1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
#include <fenv.h> #include <features.h> /* __fesetround wrapper for arch independent argument check */ hidden int __fesetround(int); int fesetround(int r) { if (r & ~( FE_TONEAREST #ifdef FE_DOWNWARD |FE_DOWNWARD #endif #ifdef FE_UPWARD |FE_UPWARD #endif #ifdef FE_TOWARDZERO |FE_TOWARDZERO #endif )) return -1; return __fesetround(r); }