1/*
2 * Copyright 2005-2010 Analog Devices Inc.
3 *
4 * Licensed under the ADI BSD license or the GPL-2 (or later)
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
24ENTRY(_strncmp)
25	CC = R2 == 0;
26	if CC JUMP 5f;
27
28	P0 = R0 ;       /* s1 */
29	P1 = R1 ;       /* s2 */
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 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 */
402:
41	R0 = 0;                /* strings are equal */
42	jump.s 4f;
433:
44	R0 = R0 - R1;          /* *s1 - *s2 */
454:
46	RTS;
47
485:
49	R0 = 0;
50	RTS;
51
52ENDPROC(_strncmp)
53