1 files changed, 23 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/complex/catanhl.c b/winsup/mingw/mingwex/complex/catanhl.c
new file mode 100755
index 000000000..50a3be950
--- /dev/null
+++ b/winsup/mingw/mingwex/complex/catanhl.c
@@ -0,0 +1,23 @@
+/* catanhl.c */
+/*
+   Contributed by Danny Smith
+   2005-01-04
+*/
+
+#include <math.h>
+#include <complex.h>
+
+/*  catanh (z) = -I * catan (I  * z)  */
+
+long double complex catanhl (long double complex Z)
+{
+  long double complex Tmp;
+  long double complex Res;
+
+  __real__ Tmp = - __imag__ Z;
+  __imag__ Tmp =   __real__ Z;
+  Tmp = catanl (Tmp);
+  __real__ Res =  __imag__ Tmp;
+  __imag__ Res = - __real__ Tmp;
+  return Res;
+}