blob: a26840d862ce5b2ae07629f488fd7183f1379b1c [file] [log] [blame]
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
#include <math.h>
double acosh(double x)
if (x < 1.0)
return NAN;
if (isinf(x*x))
return log(2) + log(x);
return log(x + sqrt(x*x - 1));