m68k specific implementation for cexp for double.

diff --git a/sysdeps/m68k/fpu/s_cexp.c b/sysdeps/m68k/fpu/s_cexp.c
new file mode 100644 (file)
index 0000000..d5c7645
--- /dev/null
+++ b/sysdeps/m68k/fpu/s_cexp.c
@@ -0,0 +1,92 @@
+/* Complex exponential function.  m68k fpu version
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
+
+   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 <complex.h>
+#include <math.h>
+
+#ifndef SUFF
+#define SUFF
+#endif
+#ifndef huge_val
+#define huge_val HUGE_VAL
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define CONCATX(a,b) __CONCAT(a,b)
+#define s(name) CONCATX(name,SUFF)
+#define m81(func) __m81_u(s(func))
+
+__complex__ float_type
+s(__cexp) (__complex__ float_type x)
+{
+  __complex__ float_type retval;
+  float_type sin_ix, cos_ix;
+
+  if (m81(__finite) (__real__ x))
+    {
+      if (m81(__finite) (__imag__ x))
+       {
+         float_type exp_val = s(__exp) (__real__ x);
+
+         __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
+                : "f" (__imag__ x));
+         __real__ retval = exp_val * cos_ix;
+         __imag__ retval = exp_val * sin_ix;
+       }
+      else
+       /* If the imaginary part is +-inf or NaN and the real part is
+          not +-inf the result is NaN + iNaN.  */
+       __real__ retval = __imag__ retval = 0.0/0.0;
+    }
+  else if (m81(__isinf) (__real__ x))
+    {
+      if (m81(__finite) (__imag__ x))
+       {
+         if (m81(__signbit) (__real__ x) == 0 && __imag__ x == 0.0)
+           retval = huge_val;
+         else
+           {
+             float_type value = m81(__signbit) (__real__ x) ? 0.0 : huge_val;
+
+             __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
+                    : "f" (__imag__ x));
+             __real__ retval = value * cos_ix;
+             __imag__ retval = value * sin_ix;
+           }
+       }
+      else if (m81(__signbit) (__real__ x) == 0)
+       {
+         __real__ retval = huge_val;
+         __imag__ retval = 0.0/0.0;
+       }
+      else
+       retval = 0.0;
+    }
+  else
+    /* If the real part is NaN the result is NaN + iNaN.  */
+    __real__ retval = __imag__ retval = 0.0/0.0;
+
+  return retval;
+}
+#define weak_aliasx(a,b) weak_alias(a,b)
+weak_aliasx (s(__cexp), s(cexp))