Initial revision

1 files changed, 73 insertions, 0 deletions

diff --git a/gas/flonum-copy.c b/gas/flonum-copy.c
new file mode 100644
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+++ b/gas/flonum-copy.c
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+/* flonum_copy.c - copy a flonum
+   Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS 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, or (at your option)
+   any later version.
+
+   GAS 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 GAS; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "as.h"
+
+void
+flonum_copy (in, out)
+     FLONUM_TYPE *in;
+     FLONUM_TYPE *out;
+{
+  unsigned int in_length;		/* 0 origin */
+  unsigned int out_length;		/* 0 origin */
+
+  out->sign = in->sign;
+  in_length = in->leader - in->low;
+
+  if (in->leader < in->low)
+    {
+      out->leader = out->low - 1;	/* 0.0 case */
+    }
+  else
+    {
+      out_length = out->high - out->low;
+      /*
+       * Assume no GAPS in packing of littlenums.
+       * I.e. sizeof(array) == sizeof(element) * number_of_elements.
+       */
+      if (in_length <= out_length)
+	{
+	  {
+	    /*
+	     * For defensive programming, zero any high-order littlenums we don't need.
+	     * This is destroying evidence and wasting time, so why bother???
+	     */
+	    if (in_length < out_length)
+	      {
+		memset ((char *) (out->low + in_length + 1), '\0', out_length - in_length);
+	      }
+	  }
+	  memcpy ((void *) (out->low), (void *) (in->low), ((in_length + 1) * sizeof (LITTLENUM_TYPE)));
+	  out->exponent = in->exponent;
+	  out->leader = in->leader - in->low + out->low;
+	}
+      else
+	{
+	  int shorten;		/* 1-origin. Number of littlenums we drop. */
+
+	  shorten = in_length - out_length;
+	  /* Assume out_length >= 0 ! */
+	  memcpy ((void *) (out->low), (void *) (in->low + shorten), ((out_length + 1) * sizeof (LITTLENUM_TYPE)));
+	  out->leader = out->high;
+	  out->exponent = in->exponent + shorten;
+	}
+    }				/* if any significant bits */
+}				/* flonum_copy() */
+
+/* end of flonum_copy.c */