1 /* flonum_copy.c - copy a flonum
2 Copyright (C) 1987, 1990, 1991, 1992 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 2, 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. */
21 * $FreeBSD: src/gnu/usr.bin/as/flo-copy.c,v 1.5 1999/08/27 23:34:15 peter Exp $
22 * $DragonFly: src/gnu/usr.bin/as/Attic/flo-copy.c,v 1.2 2003/06/17 04:25:44 dillon Exp $
31 int in_length; /* 0 origin */
32 int out_length; /* 0 origin */
35 in_length = in->leader - in->low;
38 out->leader = out->low - 1; /* 0.0 case */
40 out_length = out->high - out->low;
42 * Assume no GAPS in packing of littlenums.
43 * I.e. sizeof(array) == sizeof(element) * number_of_elements.
45 if (in_length <= out_length) {
48 * For defensive programming, zero any high-order littlenums we don't need.
49 * This is destroying evidence and wasting time, so why bother???
51 if (in_length < out_length) {
52 memset((char *)(out->low + in_length + 1), '\0', out_length - in_length);
55 memcpy((void *)(out->low), (void *)(in->low), (int)((in_length + 1) * sizeof(LITTLENUM_TYPE)));
56 out->exponent = in->exponent;
57 out->leader = in->leader - in->low + out->low;
59 int shorten; /* 1-origin. Number of littlenums we drop. */
61 shorten = in_length - out_length;
62 /* Assume out_length >= 0 ! */
63 memcpy((void *)( out->low), (void *)(in->low + shorten), (int)((out_length + 1) * sizeof(LITTLENUM_TYPE)));
64 out->leader = out->high;
65 out->exponent = in->exponent + shorten;
67 } /* if any significant bits */
70 /* end of flonum_copy.c */