Implementation status: to be implemented
double asinh(double x);
float asinhf(float x);
long double asinhl(long double x);
The functions return the inverse hyperbolic sine of their argument x.
x - value whose inverse hyperbolic sine is computed.
Upon successful completion, the function return the inverse hyperbolic sine of their argument.
If x is
NaN is returned.
If x is
±Inf, x is returned.
If x is subnormal, a range error occurs and x is returned.
[ERANGE] (Range Error) - The value of x is subnormal.
If the integer expression (
math_errhandling & MATH_ERRNO) is non-zero, then
errno is set to
[ERANGE]. If the integer expression (
math_errhandling & MATH_ERREXCEPT) is non-zero, then the underflow floating-point exception is raised.
On error, the expressions (
math_errhandling & MATH_ERRNO) and (
math_errhandling & MATH_ERREXCEPT) are independent of each other, but at least one of them must be non-zero.
An application wishing to check for error situations sets
errno to zero and call
feclearexcept(FE_ALL_EXCEPT) before calling this function. On return, if
errno is non-zero or
fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an error has occurred.