ilogb(x) returns the unbiased exponent of x as an integer, (as if
x were normalized >= 1.0 and < 2.0) except:
ilogb(NaN) is INT_MIN
ilogb(inf) is INT_MAX
logb(0) is INT_MIN
There are no errors. The sign of x is ignored.
Entry-Point Names
Generic
Function Data Type OpenVMS Tru64 UNIX
Name Required
ilogb S_FLOAT math$ilogb_s ilogbf
T_FLOAT math$ilogb_t ilogb
X_FLOAT math$ilogb_x ilogbl
F_FLOAT math$ilogb_f
G_FLOAT math$ilogb_g