* modes other than FE_TONEAREST are painful.
*/
if (spread < -LDBL_MANT_DIG) {
+#ifdef FE_INEXACT
feraiseexcept(FE_INEXACT);
+#endif
+#ifdef FE_UNDERFLOW
if (!isnormal(z))
feraiseexcept(FE_UNDERFLOW);
+#endif
switch (oround) {
- case FE_TONEAREST:
+ default: /* FE_TONEAREST */
return (z);
+#ifdef FE_TOWARDZERO
case FE_TOWARDZERO:
if (x > 0.0 ^ y < 0.0 ^ z < 0.0)
return (z);
else
return (nextafterl(z, 0));
+#endif
+#ifdef FE_DOWNWARD
case FE_DOWNWARD:
if (x > 0.0 ^ y < 0.0)
return (z);
else
return (nextafterl(z, -INFINITY));
- default: /* FE_UPWARD */
+#endif
+#ifdef FE_UPWARD
+ case FE_UPWARD:
if (x > 0.0 ^ y < 0.0)
return (nextafterl(z, INFINITY));
else
return (z);
+#endif
}
}
if (spread <= LDBL_MANT_DIG * 2)