linux: Add FSCONFIG_CMD_CREATE_EXCL from Linux 6.6 to sys/mount.h
[glibc.git] / sysdeps / m68k / memcopy.h
blob610577071d435aaedfb7e2893d11b443b6d960fc
1 /* memcopy.h -- definitions for memory copy functions. Motorola 68020 version.
2 Copyright (C) 1991-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <https://www.gnu.org/licenses/>. */
19 #include <sysdeps/generic/memcopy.h>
21 #if defined(__mc68020__) || defined(mc68020)
23 /* WORD_COPY_FWD and WORD_COPY_BWD are not symmetric on the 68020,
24 because of its weird instruction overlap characteristics. */
26 #undef WORD_COPY_FWD
27 #define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
28 do \
29 { \
30 size_t __nwords = (nbytes) / sizeof (op_t); \
31 size_t __nblocks = __nwords / 8 + 1; \
32 dst_bp -= (8 - __nwords % 8) * sizeof (op_t); \
33 src_bp -= (8 - __nwords % 8) * sizeof (op_t); \
34 switch (__nwords % 8) \
35 do \
36 { \
37 ((op_t *) dst_bp)[0] = ((op_t *) src_bp)[0]; \
38 /* Fall through. */ \
39 case 7: \
40 ((op_t *) dst_bp)[1] = ((op_t *) src_bp)[1]; \
41 /* Fall through. */ \
42 case 6: \
43 ((op_t *) dst_bp)[2] = ((op_t *) src_bp)[2]; \
44 /* Fall through. */ \
45 case 5: \
46 ((op_t *) dst_bp)[3] = ((op_t *) src_bp)[3]; \
47 /* Fall through. */ \
48 case 4: \
49 ((op_t *) dst_bp)[4] = ((op_t *) src_bp)[4]; \
50 /* Fall through. */ \
51 case 3: \
52 ((op_t *) dst_bp)[5] = ((op_t *) src_bp)[5]; \
53 /* Fall through. */ \
54 case 2: \
55 ((op_t *) dst_bp)[6] = ((op_t *) src_bp)[6]; \
56 /* Fall through. */ \
57 case 1: \
58 ((op_t *) dst_bp)[7] = ((op_t *) src_bp)[7]; \
59 /* Fall through. */ \
60 case 0: \
61 src_bp += 32; \
62 dst_bp += 32; \
63 __nblocks--; \
64 } \
65 while (__nblocks != 0); \
66 (nbytes_left) = (nbytes) % sizeof (op_t); \
67 } while (0)
69 #undef WORD_COPY_BWD
70 #define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \
71 do \
72 { \
73 size_t __nblocks = (nbytes) / 32 + 1; \
74 op_t *__dst_ep = (op_t *) (dst_ep); \
75 op_t *__src_ep = (op_t *) (src_ep); \
76 switch ((nbytes) / sizeof (op_t) % 8) \
77 do \
78 { \
79 *--__dst_ep = *--__src_ep; \
80 /* Fall through. */ \
81 case 7: \
82 *--__dst_ep = *--__src_ep; \
83 /* Fall through. */ \
84 case 6: \
85 *--__dst_ep = *--__src_ep; \
86 /* Fall through. */ \
87 case 5: \
88 *--__dst_ep = *--__src_ep; \
89 /* Fall through. */ \
90 case 4: \
91 *--__dst_ep = *--__src_ep; \
92 /* Fall through. */ \
93 case 3: \
94 *--__dst_ep = *--__src_ep; \
95 /* Fall through. */ \
96 case 2: \
97 *--__dst_ep = *--__src_ep; \
98 /* Fall through. */ \
99 case 1: \
100 *--__dst_ep = *--__src_ep; \
101 /* Fall through. */ \
102 case 0: \
103 __nblocks--; \
105 while (__nblocks != 0); \
106 (nbytes_left) = (nbytes) % sizeof (op_t); \
107 (dst_ep) = (unsigned long) __dst_ep; \
108 (src_ep) = (unsigned long) __src_ep; \
109 } while (0)
111 #endif