1 /* flonum_copy.c - copy a flonum
2 Copyright 1987, 1990, 1991, 1992, 1993, 2000
3 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
29 unsigned int in_length
; /* 0 origin */
30 unsigned int out_length
; /* 0 origin */
33 in_length
= in
->leader
- in
->low
;
35 if (in
->leader
< in
->low
)
37 out
->leader
= out
->low
- 1; /* 0.0 case */
41 out_length
= out
->high
- out
->low
;
42 /* Assume no GAPS in packing of littlenums.
43 I.e. sizeof(array) == sizeof(element) * number_of_elements. */
44 if (in_length
<= out_length
)
47 /* For defensive programming, zero any high-order
48 littlenums we don't need. This is destroying evidence
49 and wasting time, so why bother??? */
50 if (in_length
< out_length
)
52 memset ((char *) (out
->low
+ in_length
+ 1), '\0',
53 out_length
- in_length
);
56 memcpy ((void *) (out
->low
), (void *) (in
->low
),
57 ((in_length
+ 1) * sizeof (LITTLENUM_TYPE
)));
58 out
->exponent
= in
->exponent
;
59 out
->leader
= in
->leader
- in
->low
+ out
->low
;
63 int shorten
; /* 1-origin. Number of littlenums we drop. */
65 shorten
= in_length
- out_length
;
66 /* Assume out_length >= 0 ! */
67 memcpy ((void *) (out
->low
), (void *) (in
->low
+ shorten
),
68 ((out_length
+ 1) * sizeof (LITTLENUM_TYPE
)));
69 out
->leader
= out
->high
;
70 out
->exponent
= in
->exponent
+ shorten
;
72 } /* if any significant bits */
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