1 files changed, 8 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libm/atanh.c b/mdk-stage1/dietlibc/libm/atanh.c
new file mode 100644
index 000000000..bdb3367be
--- /dev/null
+++ b/mdk-stage1/dietlibc/libm/atanh.c
@@ -0,0 +1,8 @@
+#include <math.h>
+
+extern const float  __half;
+
+double  atanh ( double x )
+{
+    return __half * log ( (1.+x) / (1.-x) );
+}