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 * strcmp(s1, s2)
36 * return an integer greater than, equal to, or less than 0,
37 * according as string s1 is greater than, equal to, or less
38 * than the string s2.
39 *
40 * %eax - pointer to s1
41 * %edx - pointer to s2
42 *
43 * Written by:
44 * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
45 */
46
47/*
48 * I've unrolled the loop eight times: large enough to make a
49 * significant difference, and small enough not to totally trash the
50 * cache.
51 */
52
53ENTRY(strcmp)
54 movl 0x04(%esp),%eax
55 movl 0x08(%esp),%edx
56 jmp L2 /* Jump into the loop! */
57
58 .align 2,0x90
59L1: incl %eax
60 incl %edx
61L2: movb (%eax),%cl
62 testb %cl,%cl
63 je L3
64 cmpb %cl,(%edx)
65 jne L3
66 incl %eax
67 incl %edx
68 movb (%eax),%cl
69 testb %cl,%cl
70 je L3
71 cmpb %cl,(%edx)
72 jne L3
73 incl %eax
74 incl %edx
75 movb (%eax),%cl
76 testb %cl,%cl
77 je L3
78 cmpb %cl,(%edx)
79 jne L3
80 incl %eax
81 incl %edx
82 movb (%eax),%cl
83 testb %cl,%cl
84 je L3
85 cmpb %cl,(%edx)
86 jne L3
87 incl %eax
88 incl %edx
89 movb (%eax),%cl
90 testb %cl,%cl
91 je L3
92 cmpb %cl,(%edx)
93 jne L3
94 incl %eax
95 incl %edx
96 movb (%eax),%cl
97 testb %cl,%cl
98 je L3
99 cmpb %cl,(%edx)
100 jne L3
101 incl %eax
102 incl %edx
103 movb (%eax),%cl
104 testb %cl,%cl
105 je L3
106 cmpb %cl,(%edx)
107 jne L3
108 incl %eax
109 incl %edx
110 movb (%eax),%cl
111 testb %cl,%cl
112 je L3
113 cmpb %cl,(%edx)
114 je L1
115 .align 2, 0x90
116L3: movzbl (%eax),%eax /* unsigned comparison */
117 movzbl (%edx),%edx
118 subl %edx,%eax
119 ret
| 33
34/*
35 * strcmp(s1, s2)
36 * return an integer greater than, equal to, or less than 0,
37 * according as string s1 is greater than, equal to, or less
38 * than the string s2.
39 *
40 * %eax - pointer to s1
41 * %edx - pointer to s2
42 *
43 * Written by:
44 * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
45 */
46
47/*
48 * I've unrolled the loop eight times: large enough to make a
49 * significant difference, and small enough not to totally trash the
50 * cache.
51 */
52
53ENTRY(strcmp)
54 movl 0x04(%esp),%eax
55 movl 0x08(%esp),%edx
56 jmp L2 /* Jump into the loop! */
57
58 .align 2,0x90
59L1: incl %eax
60 incl %edx
61L2: movb (%eax),%cl
62 testb %cl,%cl
63 je L3
64 cmpb %cl,(%edx)
65 jne L3
66 incl %eax
67 incl %edx
68 movb (%eax),%cl
69 testb %cl,%cl
70 je L3
71 cmpb %cl,(%edx)
72 jne L3
73 incl %eax
74 incl %edx
75 movb (%eax),%cl
76 testb %cl,%cl
77 je L3
78 cmpb %cl,(%edx)
79 jne L3
80 incl %eax
81 incl %edx
82 movb (%eax),%cl
83 testb %cl,%cl
84 je L3
85 cmpb %cl,(%edx)
86 jne L3
87 incl %eax
88 incl %edx
89 movb (%eax),%cl
90 testb %cl,%cl
91 je L3
92 cmpb %cl,(%edx)
93 jne L3
94 incl %eax
95 incl %edx
96 movb (%eax),%cl
97 testb %cl,%cl
98 je L3
99 cmpb %cl,(%edx)
100 jne L3
101 incl %eax
102 incl %edx
103 movb (%eax),%cl
104 testb %cl,%cl
105 je L3
106 cmpb %cl,(%edx)
107 jne L3
108 incl %eax
109 incl %edx
110 movb (%eax),%cl
111 testb %cl,%cl
112 je L3
113 cmpb %cl,(%edx)
114 je L1
115 .align 2, 0x90
116L3: movzbl (%eax),%eax /* unsigned comparison */
117 movzbl (%edx),%edx
118 subl %edx,%eax
119 ret
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