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
25 flonum_copy (FLONUM_TYPE
*in
, FLONUM_TYPE
*out
)
27 unsigned int in_length
; /* 0 origin */
28 unsigned int out_length
; /* 0 origin */
31 in_length
= in
->leader
- in
->low
;
33 if (in
->leader
< in
->low
)
35 out
->leader
= out
->low
- 1; /* 0.0 case */
39 out_length
= out
->high
- out
->low
;
40 /* Assume no GAPS in packing of littlenums.
41 I.e. sizeof(array) == sizeof(element) * number_of_elements. */
42 if (in_length
<= out_length
)
45 /* For defensive programming, zero any high-order
46 littlenums we don't need. This is destroying evidence
47 and wasting time, so why bother??? */
48 if (in_length
< out_length
)
50 memset ((char *) (out
->low
+ in_length
+ 1), '\0',
51 out_length
- in_length
);
54 memcpy ((void *) (out
->low
), (void *) (in
->low
),
55 ((in_length
+ 1) * sizeof (LITTLENUM_TYPE
)));
56 out
->exponent
= in
->exponent
;
57 out
->leader
= in
->leader
- in
->low
+ out
->low
;
61 int shorten
; /* 1-origin. Number of littlenums we drop. */
63 shorten
= in_length
- out_length
;
64 /* Assume out_length >= 0 ! */
65 memcpy ((void *) (out
->low
), (void *) (in
->low
+ shorten
),
66 ((out_length
+ 1) * sizeof (LITTLENUM_TYPE
)));
67 out
->leader
= out
->high
;
68 out
->exponent
= in
->exponent
+ shorten
;
70 } /* if any significant bits */
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