1 files changed, 98 insertions, 2 deletions
diff --git a/sysdeps/m68k/fpu/e_atan2.c b/sysdeps/m68k/fpu/e_atan2.c
index ae7a799ad1..58d7555f41 100644
--- a/sysdeps/m68k/fpu/e_atan2.c
+++ b/sysdeps/m68k/fpu/e_atan2.c
@@ -1,2 +1,98 @@
-#define FUNC __ieee754_atan2
-#include <e_fmod.c>
+/* Copyright (C) 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#define __LIBC_M81_MATH_INLINES
+#include <math.h>
+#include "math_private.h"
+
+#ifndef SUFF
+#define SUFF
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define __CONCATX(a,b) __CONCAT(a,b)
+
+float_type
+__CONCATX(__ieee754_atan2,SUFF) (float_type y, float_type x)
+{
+  float_type pi, pi_2, z;
+
+  __asm ("fmovecr%.x %#0, %0" : "=f" (pi));
+  __asm ("fscale%.w %#-1, %0" : "=f" (pi_2) : "0" (pi));
+  if (x != x || y != y)
+    z = x + y;
+  else if (y == 0)
+    {
+      if (signbit (x))
+	z = signbit (y) ? -pi : pi;
+      else
+	z = y;
+    }
+  else if (__m81_u(__CONCATX(__isinf,SUFF)) (x))
+    {
+      if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
+	{
+	  float_type pi_4;
+	  __asm ("fscale%.w %#-1, %0" : "=f" (pi_4) : "0" (pi_2));
+	  z = x > 0 ? pi_4 : 3 * pi_4;
+	}
+      else
+	z = x > 0 ? 0 : pi;
+      if (signbit (y))
+	z = -z;
+    }
+  else if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
+    z = y > 0 ? pi_2 : -pi_2;
+  else if (x > 0)
+    {
+      if (y > 0)
+	{
+	  if (x > y)
+	    z = __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+      else
+	{
+	  if (x > -y)
+	    z = __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = -pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+    }
+  else
+    {
+      if (y < 0)
+	{
+	  if (-x > y)
+	    z = -pi + __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = -pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+      else
+	{
+	  if (-x > y)
+	    z = pi + __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+    }
+  return z;
+}