1 files changed, 44 insertions, 0 deletions
diff --git a/sysdeps/m68k/fpu/k_tan.c b/sysdeps/m68k/fpu/k_tan.c
new file mode 100644
index 0000000000..28f6a80cf5
--- /dev/null
+++ b/sysdeps/m68k/fpu/k_tan.c
@@ -0,0 +1,44 @@
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <math.h>
+#include "math_private.h"
+
+#ifndef FUNC
+#define FUNC tan
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define __CONCATX(a,b) __CONCAT(a,b)
+
+float_type
+__CONCATX(__kernel_,FUNC) (x, y, iy)
+     float_type x;
+     float_type y;
+     int iy;
+{
+  float_type tan_x, tan_y;
+  tan_x = __m81_u(__CONCATX(__,FUNC)) (x);
+  tan_y = __m81_u(__CONCATX(__,FUNC)) (y);
+  if (iy > 0)
+    return (tan_x + tan_y) / (1 - tan_x * tan_y);
+  else
+    return (tan_x * tan_y - 1) / (tan_x + tan_y);
+}