1 /* flonum_copy.c - copy a flonum
2 Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* static const char rcsid[] = "$Id$"; */
25 #define bzero(s,n) memset(s,0,n)
26 #define bcopy(from,to,n) memcpy(to,from,n)
34 int in_length; /* 0 origin */
35 int out_length; /* 0 origin */
37 out -> sign = in -> sign;
38 in_length = in -> leader - in -> low;
41 out -> leader = out -> low - 1; /* 0.0 case */
45 out_length = out -> high - out -> low;
47 * Assume no GAPS in packing of littlenums.
48 * I.e. sizeof(array) == sizeof(element) * number_of_elements.
50 if (in_length <= out_length)
54 * For defensive programming, zero any high-order littlenums we don't need.
55 * This is destroying evidence and wasting time, so why bother???
57 if (in_length < out_length)
59 bzero ((char *)(out->low + in_length + 1), out_length - in_length);
62 bcopy ((char *)(in->low), (char *)(out->low), (int)((in_length + 1) * sizeof(LITTLENUM_TYPE)));
63 out -> exponent = in -> exponent;
64 out -> leader = in -> leader - in -> low + out -> low;
68 int shorten; /* 1-origin. Number of littlenums we drop. */
70 shorten = in_length - out_length;
71 /* Assume out_length >= 0 ! */
72 bcopy ((char *)(in->low + shorten),(char *)( out->low), (int)((out_length + 1) * sizeof(LITTLENUM_TYPE)));
73 out -> leader = out -> high;
74 out -> exponent = in -> exponent + shorten;
76 } /* if any significant bits */
79 /* end: flonum_copy.c */