1 files changed, 23 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/complex/casinh.c b/winsup/mingw/mingwex/complex/casinh.c
new file mode 100644
index 000000000..a86c1d625
--- /dev/null
+++ b/winsup/mingw/mingwex/complex/casinh.c
@@ -0,0 +1,23 @@
+/*
+   casinh.c
+   Contributed by Danny Smith
+   2003-10-20
+*/
+
+#include <math.h>
+#include <complex.h>
+
+/* casinh (z) = -I casin (I * z) */
+
+double complex casinh (double complex Z)
+{
+  double complex Tmp;
+  double complex Res;
+
+  __real__ Tmp = - __imag__ Z;
+  __imag__ Tmp =   __real__ Z;
+  Tmp = casin (Tmp);
+  __real__ Res =   __imag__ Tmp;
+  __imag__ Res = - __real__ Tmp;
+  return Res;
+}