Commit | Line | Data |
---|---|---|
479ba603 RG |
1 | /* |
2 | * Copyright 2005-2010 Analog Devices Inc. | |
3 | * | |
de450838 | 4 | * Licensed under the Clear BSD license or the GPL-2 (or later) |
479ba603 RG |
5 | */ |
6 | ||
7 | #include <linux/linkage.h> | |
8 | ||
9 | /* void *strncpy(char *s1, const char *s2, size_t n); | |
10 | * R0 = address (dest) | |
11 | * R1 = address (src) | |
12 | * R2 = size (n) | |
13 | * Returns a pointer to the destination string dest | |
14 | */ | |
15 | ||
16 | #ifdef CONFIG_STRNCMP_L1 | |
17 | .section .l1.text | |
18 | #else | |
19 | .text | |
20 | #endif | |
21 | ||
22 | .align 2 | |
23 | ||
24 | ENTRY(_strncmp) | |
25 | CC = R2 == 0; | |
26 | if CC JUMP 5f; | |
27 | ||
28 | P0 = R0 ; /* s1 */ | |
29 | P1 = R1 ; /* s2 */ | |
30 | 1: | |
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 3f; /* not equal, break out */ | |
35 | CC = R0; /* at end of s1? */ | |
36 | if ! cc jump 4f; /* yes, all done */ | |
37 | R2 += -1; /* no, adjust count */ | |
38 | CC = R2 == 0; | |
39 | if ! cc jump 1b (bp); /* more to do, keep going */ | |
40 | 2: | |
41 | R0 = 0; /* strings are equal */ | |
42 | jump.s 4f; | |
43 | 3: | |
44 | R0 = R0 - R1; /* *s1 - *s2 */ | |
45 | 4: | |
46 | RTS; | |
47 | ||
48 | 5: | |
49 | R0 = 0; | |
50 | RTS; | |
51 | ||
52 | ENDPROC(_strncmp) |