1#include <fenv.h> 2#include <float.h> 3 4int __flt_rounds() { 5 switch (fegetround()) { 6#ifdef FE_TOWARDZERO 7 case FE_TOWARDZERO: 8 return 0; 9#endif 10 case FE_TONEAREST: 11 return 1; 12#ifdef FE_UPWARD 13 case FE_UPWARD: 14 return 2; 15#endif 16#ifdef FE_DOWNWARD 17 case FE_DOWNWARD: 18 return 3; 19#endif 20 } 21 return -1; 22} 23