HP-UX Reference (11i v2 07/12) - 3 Library Functions A-M (vol 6)

c
cexp2(3M) cexp2(3M)
(HP Integrity Server Only)
NAME
cexp2(), cexp2f(), cexp2l(), cexp2w(), cexp2q() - complex base-2 exponential functions
SYNOPSIS
#include <complex.h>
double complex cexp2(double complex
z);
float complex cexp2f(float complex
z);
long double complex cexp2l(long double complex
z);
extended complex cexp2w(extended complex
z);
quad complex cexp2q(quad complex
z);
DESCRIPTION
cexp2() returns the complex base-2 exponential of z.
cexp2f() is a float complex version of cexp2()
; it takes a float complex argument and
returns a
float complex result.
cexp2l() is a long double complex version of cexp2(); it takes a long double complex
argument and returns a long double complex result.
cexp2w() is an extended complex version of cexp2(); it takes an extended complex argu-
ment and returns an
extended complex result.
cexp2q() is equivalent to cexp2l() on HP-UX systems.
USAGE
To use these functions, compile with the default -Ae option. To use cexp2w() or
cexp2q(), compile
with the
-fpwidetypes option. Make sure your program includes <complex.h> . Link in the math
library by specifying -lm on the compiler or linker command line.
RETURN VALUE
cexp2(conj( z)) = conj(cexp2( z)).
cexp2(±0+i0) returns 1+i0.
cexp2(x+iInf) returns NaN+iNaN and raises the invalid floating-point exception, for finite x.
cexp2(x+iNaN) returns NaN+iNaN and optionally raises the invalid floating-point exception, for finite x.
cexp2(+Inf+i0) returns +Inf+i0.
cexp2(-Inf+iy) returns +0(cos(log(2)y)+isin(log(2)y
)), for finite y.
cexp2(+Inf+iy) returns +Inf(cos(log( 2)y)+isin(log(2)y
)), for finite nonzero y.
cexp2(-Inf+iInf) returns ±0±i0 (where the signs of the real and imaginary parts of the result are
unspecified).
cexp2(+Inf+iInf) returns ±Inf+iNaN and raises the invalid floating-point exception (where the sign of the
real part of the result is unspecified).
cexp2(-Inf+iNaN) returns ±0±i0 (where the signs of the real and imaginary parts of the result are
unspecified).
cexp2(+Inf+iNaN) returns ±Inf+iNaN (where the sign of the real part of the result is unspecified).
cexp2(NaN+i0) returns NaN+i0.
cexp2(NaN+iy) returns NaN+iNaN and optionally raises the invalid floating-point exception, for all non-
zero numbers y.
cexp2(NaN+iNaN) returns NaN+iNaN.
ERRORS
No errors are defined.
HP-UX 11i Version 2: December 2007 Update − 1 − Hewlett-Packard Company 175