1 files changed, 19 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/math/atanl.c b/winsup/mingw/mingwex/math/atanl.c
new file mode 100644
index 000000000..5de06d35b
--- /dev/null
+++ b/winsup/mingw/mingwex/math/atanl.c
@@ -0,0 +1,19 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ *
+ * Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>.
+ */
+
+#include <math.h>
+
+long double
+atanl (long double x)
+{
+  long double res;
+
+  asm ("fld1\n\t"
+       "fpatan"
+       : "=t" (res) : "0" (x));
+  return res;
+}