1/*
2 * Copyright (c) 1993 Winning Strategies, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Winning Strategies, Inc.
16 * 4. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <machine/asm.h>
| 1/*
2 * Copyright (c) 1993 Winning Strategies, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Winning Strategies, Inc.
16 * 4. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <machine/asm.h>
|
33
34/*
35 * strcpy (dst, src)
36 * copy the string src to dst.
37 *
38 * Written by:
39 * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
40 */
41
42/*
43 * I've unrolled the loop eight times: large enough to make a
44 * significant difference, and small enough not to totally trash the
45 * cache.
46 */
47
48ENTRY(strcpy)
49 movl 4(%esp),%ecx /* dst address */
50 movl 8(%esp),%edx /* src address */
51 pushl %ecx /* push dst address */
52
53 .align 2,0x90
54L1: movb (%edx),%al /* unroll loop, but not too much */
55 movb %al,(%ecx)
56 testb %al,%al
57 je L2
58 movb 1(%edx),%al
59 movb %al,1(%ecx)
60 testb %al,%al
61 je L2
62 movb 2(%edx),%al
63 movb %al,2(%ecx)
64 testb %al,%al
65 je L2
66 movb 3(%edx),%al
67 movb %al,3(%ecx)
68 testb %al,%al
69 je L2
70 movb 4(%edx),%al
71 movb %al,4(%ecx)
72 testb %al,%al
73 je L2
74 movb 5(%edx),%al
75 movb %al,5(%ecx)
76 testb %al,%al
77 je L2
78 movb 6(%edx),%al
79 movb %al,6(%ecx)
80 testb %al,%al
81 je L2
82 movb 7(%edx),%al
83 movb %al,7(%ecx)
84 addl $8,%edx
85 addl $8,%ecx
86 testb %al,%al
87 jne L1
88L2: popl %eax /* pop dst address */
89 ret
| 33
34/*
35 * strcpy (dst, src)
36 * copy the string src to dst.
37 *
38 * Written by:
39 * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
40 */
41
42/*
43 * I've unrolled the loop eight times: large enough to make a
44 * significant difference, and small enough not to totally trash the
45 * cache.
46 */
47
48ENTRY(strcpy)
49 movl 4(%esp),%ecx /* dst address */
50 movl 8(%esp),%edx /* src address */
51 pushl %ecx /* push dst address */
52
53 .align 2,0x90
54L1: movb (%edx),%al /* unroll loop, but not too much */
55 movb %al,(%ecx)
56 testb %al,%al
57 je L2
58 movb 1(%edx),%al
59 movb %al,1(%ecx)
60 testb %al,%al
61 je L2
62 movb 2(%edx),%al
63 movb %al,2(%ecx)
64 testb %al,%al
65 je L2
66 movb 3(%edx),%al
67 movb %al,3(%ecx)
68 testb %al,%al
69 je L2
70 movb 4(%edx),%al
71 movb %al,4(%ecx)
72 testb %al,%al
73 je L2
74 movb 5(%edx),%al
75 movb %al,5(%ecx)
76 testb %al,%al
77 je L2
78 movb 6(%edx),%al
79 movb %al,6(%ecx)
80 testb %al,%al
81 je L2
82 movb 7(%edx),%al
83 movb %al,7(%ecx)
84 addl $8,%edx
85 addl $8,%ecx
86 testb %al,%al
87 jne L1
88L2: popl %eax /* pop dst address */
89 ret
|