1/*
2 * Copyright 2005-2009 Analog Devices Inc.
3 *
4 * Licensed under the Clear BSD license or the GPL-2 (or later)
5 */
6
7#include <linux/linkage.h>
8
9/* void *memchr(const void *s, int c, size_t n);
10 * R0 = address (s)
11 * R1 = sought byte (c)
12 * R2 = count (n)
13 *
14 * Returns pointer to located character.
15 */
16
17.text
18
19.align 2
20
21ENTRY(_memchr)
22	P0 = R0;		/* P0 = address */
23	P2 = R2;		/* P2 = count */
24	R1 = R1.B(Z);
25	CC = R2 == 0;
26	IF CC JUMP .Lfailed;
27
28.Lbytes:
29	LSETUP (.Lbyte_loop_s, .Lbyte_loop_e) LC0=P2;
30
31.Lbyte_loop_s:
32	R3 = B[P0++](Z);
33	CC = R3 == R1;
34	IF CC JUMP .Lfound;
35.Lbyte_loop_e:
36	NOP;
37
38.Lfailed:
39	R0=0;
40	RTS;
41
42.Lfound:
43	R0 = P0;
44	R0 += -1;
45	RTS;
46
47ENDPROC(_memchr)
48