1 files changed, 101 insertions, 0 deletions
diff --git a/gsl-1.9/ieee-utils/fp-gnum68k.c b/gsl-1.9/ieee-utils/fp-gnum68k.c
new file mode 100644
index 0000000..5aab825
--- /dev/null
+++ b/gsl-1.9/ieee-utils/fp-gnum68k.c
@@ -0,0 +1,101 @@
+/* ieee-utils/fp-gnum68k.c
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 Brian Gough
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ * 
+ * This program 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
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <stdio.h>
+#include <fpu_control.h>
+#include <gsl/gsl_errno.h>
+#include <gsl/gsl_ieee_utils.h>
+
+int
+gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
+{
+  unsigned short mode = 0 ;
+
+  switch (precision)
+    {
+    case GSL_IEEE_SINGLE_PRECISION:
+      mode |= _FPU_SINGLE ;
+      break ;
+    case GSL_IEEE_DOUBLE_PRECISION:
+      mode |= _FPU_DOUBLE ;
+      break ;
+    case GSL_IEEE_EXTENDED_PRECISION:
+      mode |= _FPU_EXTENDED ;
+      break ;
+    default:
+      mode |= _FPU_EXTENDED ;
+    }
+
+  switch (rounding)
+    {
+    case GSL_IEEE_ROUND_TO_NEAREST:
+      mode |= _FPU_RC_NEAREST ;
+      break ;
+    case GSL_IEEE_ROUND_DOWN:
+      mode |= _FPU_RC_DOWN ;
+      break ;
+    case GSL_IEEE_ROUND_UP:
+      mode |= _FPU_RC_UP ;
+      break ;
+    case GSL_IEEE_ROUND_TO_ZERO:
+      mode |= _FPU_RC_ZERO ;
+      break ;
+    default:
+      mode |= _FPU_RC_NEAREST ;
+    }
+
+  /* FIXME: I don't have documentation for the M68K so I'm not sure
+     about the mapping of the exceptions below. Maybe someone who does
+     know could correct this. */
+
+  if (exception_mask & GSL_IEEE_MASK_INVALID)
+    mode |= _FPU_MASK_OPERR ;
+  
+  if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
+    {
+      /* do nothing */
+    } 
+  else
+    {
+      GSL_ERROR ("the denormalized operand exception has not been implemented for m68k yet. Use 'mask-denormalized' to work around this.", GSL_EUNSUP) ;
+      /*mode |= _FPU_MASK_DM ; ???? */ 
+    }
+  
+  if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
+    mode |= _FPU_MASK_DZ ;
+
+  if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
+    mode |= _FPU_MASK_OVFL ;
+
+  if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
+    mode |= _FPU_MASK_UNFL ;
+
+  if (exception_mask & GSL_IEEE_TRAP_INEXACT)
+    {
+      mode &= ~ (_FPU_MASK_INEX1 | _FPU_MASK_INEX2) ;
+    }
+  else
+    {
+      mode |= (_FPU_MASK_INEX1 | _FPU_MASK_INEX2) ;
+    }
+
+  _FPU_SETCW(mode) ;
+
+  return GSL_SUCCESS ;
+}