Move m68k from ports to libc

1 files changed, 136 insertions, 0 deletions

diff --git a/sysdeps/m68k/m680x0/fpu/s_cexp.c b/sysdeps/m68k/m680x0/fpu/s_cexp.c
new file mode 100644
index 0000000000..79a2ca49c3
--- /dev/null
+++ b/sysdeps/m68k/m680x0/fpu/s_cexp.c
@@ -0,0 +1,136 @@
+/* Complex exponential function.  m68k fpu version
+   Copyright (C) 1997-2014 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 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <float.h>
+#include <complex.h>
+#include <math.h>
+#include "mathimpl.h"
+
+#ifndef SUFF
+#define SUFF
+#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;
+  unsigned long ix_cond;
+
+  ix_cond = __m81_test (__imag__ x);
+
+  if ((ix_cond & (__M81_COND_NAN|__M81_COND_INF)) == 0)
+    {
+      /* Imaginary part is finite.  */
+      unsigned long rx_cond = __m81_test (__real__ x);
+
+      if ((rx_cond & (__M81_COND_NAN|__M81_COND_INF)) == 0)
+	{
+	  const int t = (int) ((LDBL_MAX_EXP - 1) * M_LN2l);
+	  long double sin_ix, cos_ix, exp_val;
+
+	  __m81_u (__sincosl) (__imag__ x, &sin_ix, &cos_ix);
+
+	  if (__real__ x > t)
+	    {
+	      long double exp_t = __m81_u(__ieee754_expl) (t);
+	      __real__ x -= t;
+	      sin_ix *= exp_t;
+	      cos_ix *= exp_t;
+	      if (__real__ x > t)
+		{
+		  __real__ x -= t;
+		  sin_ix *= exp_t;
+		  cos_ix *= exp_t;
+		}
+	    }
+
+	  exp_val = __m81_u(__ieee754_expl) (__real__ x);
+	  __real__ retval = exp_val * cos_ix;
+	  if (ix_cond & __M81_COND_ZERO)
+	    __imag__ retval = __imag__ x;
+	  else
+	    __imag__ retval = exp_val * sin_ix;
+	}
+      else
+	{
+	  /* Compute the sign of the result.  */
+	  long double remainder, pi_2;
+	  int quadrant;
+
+	  if ((rx_cond & (__M81_COND_NAN|__M81_COND_NEG)) == __M81_COND_NEG)
+	    __real__ retval = __imag__ retval = 0.0;
+	  else
+	    __real__ retval = __imag__ retval = __real__ x;
+	  __asm ("fmovecr %#0,%0\n\tfscale%.w %#-1,%0" : "=f" (pi_2));
+	  __asm ("fmod%.x %2,%0\n\tfmove%.l %/fpsr,%1"
+		 : "=f" (remainder), "=dm" (quadrant)
+		 : "f" (pi_2), "0" (__imag__ x));
+	  quadrant = (quadrant >> 16) & 0x83;
+	  if (quadrant & 0x80)
+	    quadrant ^= 0x83;
+	  switch (quadrant)
+	    {
+	    default:
+	      break;
+	    case 1:
+	      __real__ retval = -__real__ retval;
+	      break;
+	    case 2:
+	      __real__ retval = -__real__ retval;
+	    case 3:
+	      __imag__ retval = -__imag__ retval;
+	      break;
+	    }
+	  if (ix_cond & __M81_COND_ZERO && (rx_cond & __M81_COND_NAN) == 0)
+	    __imag__ retval = __imag__ x;
+	}
+    }
+  else
+    {
+      unsigned long rx_cond = __m81_test (__real__ x);
+
+      if (rx_cond & __M81_COND_INF)
+	{
+	  /* Real part is infinite.  */
+	  if (rx_cond & __M81_COND_NEG)
+	    {
+	      __real__ retval = __imag__ retval = 0.0;
+	      if (ix_cond & __M81_COND_NEG)
+		__imag__ retval = -__imag__ retval;
+	    }
+	  else
+	    {
+	      __real__ retval = __real__ x;
+	      __imag__ retval = __imag__ x - __imag__ x;
+	    }
+	}
+      else
+	__real__ retval = __imag__ retval = __imag__ x - __imag__ x;
+    }
+
+  return retval;
+}
+weak_alias (s(__cexp), s(cexp))