powd64.3m (2010 09)

powd64(3M) powd64(3M)

(HP Integrity Server Only)

powd64() returns the properly signed inﬁnity (or, in some non-default rounding direction modes, the

properly signed maximum-magnitude ﬁnite number) in lieu of a value whose magnitude is too large, and

raises the overﬂow and inexact exceptions.

powd64() raises the underﬂow exception whenever a result is tiny (essentially subnormal or zero) and

inexact.

powd64() raises the inexact exception whenever a rounded result does not equal the mathematical

result.

ERRORS

For ﬁnite x<0 and ﬁnite non-integer y,

powd64() sets errno to [EDOM].

powd64(±0, y) sets errno

to [ERANGE] if y is an odd integer < 0.

powd64(±0, y) sets

errno to [ERANGE] if y<0 and not an odd integer.

If the correct value would overﬂow,

powd64() sets errno to [ERANGE].