1 files changed, 6 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libm/acosh.c b/mdk-stage1/dietlibc/libm/acosh.c
new file mode 100644
index 000000000..a09a4c9f0
--- /dev/null
+++ b/mdk-stage1/dietlibc/libm/acosh.c
@@ -0,0 +1,6 @@
+#include <math.h>
+
+double  acosh ( double x )
+{
+    return log ( x + sqrt (x*x - 1.) );
+}