times a power of two,
and its absolute value is always in the range 1/2 (inclusive) to
1 (exclusive), that is, [0.5,1).
-
+.PP
If
.I x
is zero, then the normalized fraction is
zero and zero is stored in
.IR exp .
-
+.PP
If
.I x
is a NaN,
a NaN is returned, and the value of
.I *exp
is unspecified.
-
+.PP
If
.I x
is positive infinity (negative infinity),
.TE
.SH CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.
-
+.PP
The variant returning
.I double
also conforms to