1 files changed, 37 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/complex/cacoshf.c b/winsup/mingw/mingwex/complex/cacoshf.c
new file mode 100755
index 000000000..411afb3c5
--- /dev/null
+++ b/winsup/mingw/mingwex/complex/cacoshf.c
@@ -0,0 +1,37 @@
+/*
+   cacoshf.c
+   Contributed by Danny Smith
+   2004-12-24
+*/
+
+#include <math.h>
+#include <complex.h>
+
+#if 0
+/* cacoshf (z) = I * cacos (z)  */
+float complex cacosh (float complex Z)
+{
+  float complex Tmp;
+  float complex Res;
+
+  Tmp = cacosf (Z);
+  __real__ Res = -__imag__ Tmp;
+  __imag__ Res = __real__ Tmp;
+  return Res;
+}
+
+#else
+
+/* cacosh (z) = I * cacos (z) = I * (pi/2 - casin (z))  */
+
+float complex cacoshf (float complex Z)
+{
+  float complex Tmp;
+  float complex Res;
+
+  Tmp = casinf (Z);
+  __real__ Res = __imag__ Tmp;
+  __imag__ Res =  M_PI_2 - __real__ Tmp;
+  return Res;
+}
+#endif