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#define __STDC_VERSION_FENV_H__ 202311L
 
#define FE_ALL_EXCEPT /* see description */
#define FE_DIVBYZERO /* see description */
#define FE_INEXACT /* see description */
#define FE_INVALID /* see description */
#define FE_OVERFLOW /* see description */
#define FE_UNDERFLOW /* see description */
#define FE_DOWNWARD /* see description */
#define FE_TONEARESTFROMZERO /* see description */
#define FE_TONEAREST /* see description */
#define FE_TOWARDZERO /* see description */
#define FE_UPWARD /* see description */
#define FE_DFL_ENV /* see description */
#define FE_DFL_MODE /* see description */
 
#define fenv_t /* see description */
#define fexcept_t /* see description */
#define femode_t /* see description */
 
#pragma STDC FENV_ACCESS /*on-off-switch*/
#pragma STDC FENV_ROUND direction
#pragma STDC FENV_ROUND FE_DYNAMIC
 
// functions
int feclearexcept (int excepts);
int fegetexceptflag (fexcept_t* flagp, int excepts);
int feraiseexcept (int excepts);
int fesetexcept(int excepts);
int fesetexceptflag (const fexcept_t* flagp, int excepts);
int fetestexceptflag(const fexcept_t* flagp, int excepts);
int fetestexcept (int excepts);
int fegetmode(femode_t* modep);
int fegetround (void);
int fesetmode(const femode_t* modep);
int fesetround (int rnd);
int fegetenv (fenv_t* envp);
int feholdexcept (fenv_t* envp);
int fesetenv (const fenv_t* envp);
int feupdateenv (const fenv_t* envp);
 
// Only if the implementation defines __STDC_IEC_60559_DFP__:
#define FE_DEC_DOWNWARD /* implementation-defined */
#define FE_DEC_TONEARESTFROMZERO /* implementation-defined */
#define FE_DEC_TONEAREST /* implementation-defined */
#define FE_DEC_TOWARDZERO /* implementation-defined */
#define FE_DEC_UPWARD /* implementation-defined */
 
#pragma STDC FENV_DEC_ROUND /*dec-direction*/
int fe_dec_getround(void);
int fe_dec_setround(int rnd);
 
// Only if the implementation follows the recommended practice from F.2.2:
#define FE_SNANS_ALWAYS_SIGNAL /* implementation-defined */