1 /** 2 * This file has no copyright assigned and is placed in the Public Domain. 3 * This file is part of the mingw-w64 runtime package. 4 * No warranty is given; refer to the file DISCLAIMER.PD within this package. 5 */ 6 7 #include <math.h> 8 asinh(double x)9double asinh(double x) 10 { 11 if (isinf(x*x + 1)) { 12 if (x > 0) 13 return log(2) + log(x); 14 else 15 return -log(2) - log(-x); 16 } 17 return log(x + sqrt(x*x + 1)); 18 } 19