1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from locore.s.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <machine/asm.h>
| 1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from locore.s.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <machine/asm.h>
|
34
35#if 0
36 RCSID("$NetBSD: bcopy.S,v 1.6 1996/11/12 00:50:06 jtc Exp $")
37#endif
38
39 /*
40 * (ov)bcopy (src,dst,cnt)
41 * ws@tools.de (Wolfgang Solfrank, TooLs GmbH) +49-228-985800
42 */
43
44#ifdef MEMCOPY
45ENTRY(memcpy)
46#else
47#ifdef MEMMOVE
48ENTRY(memmove)
49#else
50ENTRY(bcopy)
51#endif
52#endif
53 pushl %esi
54 pushl %edi
55#if defined(MEMCOPY) || defined(MEMMOVE)
56 movl 12(%esp),%edi
57 movl 16(%esp),%esi
58 movl %edi,%eax
59#else
60 movl 12(%esp),%esi
61 movl 16(%esp),%edi
62#endif
63 movl 20(%esp),%ecx
64 movl %edi,%edx
65 subl %esi,%edx
66 cmpl %ecx,%edx /* overlapping? */
67 jb 1f
68 cld /* nope, copy forwards. */
69 movl %ecx,%edx
70 shrl $2,%ecx /* copy by words */
71 rep
72 movsl
73 movl %edx,%ecx
74 andl $3,%ecx /* any bytes left? */
75 rep
76 movsb
77 popl %edi
78 popl %esi
79 ret
801:
81 addl %ecx,%edi /* copy backwards. */
82 addl %ecx,%esi
83 std
84 movl %ecx,%edx
85 andl $3,%ecx /* any fractional bytes? */
86 decl %edi
87 decl %esi
88 rep
89 movsb
90 movl %edx,%ecx /* copy remainder by words */
91 shrl $2,%ecx
92 subl $3,%esi
93 subl $3,%edi
94 rep
95 movsl
96 popl %edi
97 popl %esi
98 cld
99 ret
| 34
35#if 0
36 RCSID("$NetBSD: bcopy.S,v 1.6 1996/11/12 00:50:06 jtc Exp $")
37#endif
38
39 /*
40 * (ov)bcopy (src,dst,cnt)
41 * ws@tools.de (Wolfgang Solfrank, TooLs GmbH) +49-228-985800
42 */
43
44#ifdef MEMCOPY
45ENTRY(memcpy)
46#else
47#ifdef MEMMOVE
48ENTRY(memmove)
49#else
50ENTRY(bcopy)
51#endif
52#endif
53 pushl %esi
54 pushl %edi
55#if defined(MEMCOPY) || defined(MEMMOVE)
56 movl 12(%esp),%edi
57 movl 16(%esp),%esi
58 movl %edi,%eax
59#else
60 movl 12(%esp),%esi
61 movl 16(%esp),%edi
62#endif
63 movl 20(%esp),%ecx
64 movl %edi,%edx
65 subl %esi,%edx
66 cmpl %ecx,%edx /* overlapping? */
67 jb 1f
68 cld /* nope, copy forwards. */
69 movl %ecx,%edx
70 shrl $2,%ecx /* copy by words */
71 rep
72 movsl
73 movl %edx,%ecx
74 andl $3,%ecx /* any bytes left? */
75 rep
76 movsb
77 popl %edi
78 popl %esi
79 ret
801:
81 addl %ecx,%edi /* copy backwards. */
82 addl %ecx,%esi
83 std
84 movl %ecx,%edx
85 andl $3,%ecx /* any fractional bytes? */
86 decl %edi
87 decl %esi
88 rep
89 movsb
90 movl %edx,%ecx /* copy remainder by words */
91 shrl $2,%ecx
92 subl $3,%esi
93 subl $3,%edi
94 rep
95 movsl
96 popl %edi
97 popl %esi
98 cld
99 ret
|