1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/* Copyright (C) 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdeps/generic/memcopy.h>
/* We override the word-copying macros, partly because misalignment in one
pointer isn't cause for a special function, partly because we want to
get rid of wordcopy.c; these macros are only used in memmove.c (and
it's sibling bcopy) since we have arch-specific mempcpy, memcpy and
memset. */
#undef OP_T_THRES
#define OP_T_THRES OPSIZ
#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
do \
{ \
unsigned long enddst_bp = dst_bp + nbytes - (nbytes % OPSIZ); \
nbytes_left = (nbytes % OPSIZ); \
while (dst_bp < (unsigned long) enddst_bp) \
{ \
op_t x = *(op_t *) src_bp; \
src_bp += sizeof x; \
*(op_t *) dst_bp = x; \
dst_bp += sizeof x; \
} \
} while (0)
#define WORD_COPY_BWD(dst_bp, src_bp, nbytes_left, nbytes) \
do \
{ \
unsigned long enddst_bp = dst_bp - nbytes + (nbytes % OPSIZ); \
nbytes_left = (nbytes % OPSIZ); \
while (dst_bp > enddst_bp) \
{ \
op_t x; \
src_bp -= sizeof x; \
x = *(op_t *) src_bp; \
dst_bp -= sizeof x; \
*(op_t *) dst_bp = x; \
} \
} while (0)
|
