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Robin Getz479ba602010-05-03 17:23:20 +00001/*
2 * Copyright 2005-2010 Analog Devices Inc.
3 *
Sonic Zhangde450832012-05-17 14:45:27 +08004 * Licensed under the Clear BSD license or the GPL-2 (or later)
Robin Getz479ba602010-05-03 17:23:20 +00005 */
6
7#include <linux/linkage.h>
8
9/* void *strcmp(char *s1, const char *s2);
10 * R0 = address (s1)
11 * R1 = address (s2)
12 *
13 * Returns an integer less than, equal to, or greater than zero if s1
14 * (or the first n bytes thereof) is found, respectively, to be less
15 * than, to match, or be greater than s2.
16 */
17
18#ifdef CONFIG_STRCMP_L1
19.section .l1.text
20#else
21.text
22#endif
23
24.align 2
25
26ENTRY(_strcmp)
27 P0 = R0 ; /* s1 */
28 P1 = R1 ; /* s2 */
29
301:
31 R0 = B[P0++] (Z); /* get *s1 */
32 R1 = B[P1++] (Z); /* get *s2 */
33 CC = R0 == R1; /* compare a byte */
34 if ! cc jump 2f; /* not equal, break out */
35 CC = R0; /* at end of s1? */
36 if cc jump 1b (bp); /* no, keep going */
37 jump.s 3f; /* strings are equal */
382:
39 R0 = R0 - R1; /* *s1 - *s2 */
403:
41 RTS;
42
43ENDPROC(_strcmp)