1 /* flonum_copy.c - copy a flonum
2 Copyright (C) 1987-2019 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 3, 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 the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
24 flonum_copy (FLONUM_TYPE
*in
, FLONUM_TYPE
*out
)
26 unsigned int in_length
; /* 0 origin */
27 unsigned int out_length
; /* 0 origin */
30 in_length
= in
->leader
- in
->low
;
32 if (in
->leader
< in
->low
)
34 out
->leader
= out
->low
- 1; /* 0.0 case */
38 out_length
= out
->high
- out
->low
;
39 /* Assume no GAPS in packing of littlenums.
40 I.e. sizeof(array) == sizeof(element) * number_of_elements. */
41 if (in_length
<= out_length
)
44 /* For defensive programming, zero any high-order
45 littlenums we don't need. This is destroying evidence
46 and wasting time, so why bother??? */
47 if (in_length
< out_length
)
49 memset ((char *) (out
->low
+ in_length
+ 1), '\0',
50 out_length
- in_length
);
53 memcpy ((void *) (out
->low
), (void *) (in
->low
),
54 ((in_length
+ 1) * sizeof (LITTLENUM_TYPE
)));
55 out
->exponent
= in
->exponent
;
56 out
->leader
= in
->leader
- in
->low
+ out
->low
;
60 int shorten
; /* 1-origin. Number of littlenums we drop. */
62 shorten
= in_length
- out_length
;
63 /* Assume out_length >= 0 ! */
64 memcpy ((void *) (out
->low
), (void *) (in
->low
+ shorten
),
65 ((out_length
+ 1) * sizeof (LITTLENUM_TYPE
)));
66 out
->leader
= out
->high
;
67 out
->exponent
= in
->exponent
+ shorten
;
69 } /* if any significant bits */
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