+// TODO: Documentation, checking for personality
+
+// ----------------------------------------------------------------------------
+// MACROS
+
+// Used
+#define FE_DIVBYZERO // TODO
+#define FE_INEXACT // TODO
+#define FE_INVALID // TODO
+#define FE_OVERFLOW // TODO
+#define FE_UNDERFLOW // TODO
+#define FE_ALL_EXCEPT // TODO
+
+#define FE_DOWNWARD // TODO
+#define FE_TONEAREST // TODO
+#define FE_TOWARDZERO // TODO
+#define FE_UPWARD // TODO
+
+#define FE_DFL_ENV // TODO
+
+// ----------------------------------------------------------------------------
+// TYPEDEFS
+
+typedef fenv_t; // TODO
+typedef fexcept_t; // TODO
+
+// ----------------------------------------------------------------------------
+// FUNCTIONS
+
+int feclearexcept( int exceptions );
+int fegetexceptflag( fexcept_t * flags, int exceptions );
+int feraiseexcept( int exceptions );
+int fesetexceptflag( const fexcept_t * flags, int exceptions );
+int fetestexcept( int exceptions );
+
+int fegetround( void );
+int fesetround( int mode );
+
+int fegetenv( fenv_t * environment );
+int feholdexcept( fenv_t * environment );
+int fesetenv( const fenv_t * environment );
+int feupdateenv( const fenv_t * environment );