# endif
#endif
+/* NV_MANT_BITS is the number of _real_ mantissa bits in an NV.
+ * For the standard IEEE 754 fp this number is usually one less that
+ * *DBL_MANT_DIG because of the implicit (aka hidden) bit, which isn't
+ * real. For the 80-bit extended precision formats (x86*), the number
+ * of mantissa bits... depends. For normal floats, it's 64. But for
+ * the inf/nan, it's different (zero for inf, 61 for nan).
+ * NV_MANT_BITS works for normal floats. */
+#ifdef USE_QUADMATH /* IEEE 754 128-bit */
+# define NV_MANT_BITS (FLT128_MANT_DIG - 1)
+#elif NVSIZE == DOUBLESIZE
+# define NV_MANT_BITS DOUBLEMANTBITS
+#elif NVSIZE == LONG_DOUBLESIZE
+# define NV_MANT_BITS LONGDBLMANTBITS
+#endif
+
/*
(KEEP THIS LAST IN perl.h!)