2010-05-04 01:23:20 +08:00
|
|
|
/*
|
|
|
|
|
* Copyright 2005-2010 Analog Devices Inc.
|
|
|
|
|
*
|
2012-05-17 14:45:27 +08:00
|
|
|
* Licensed under the Clear BSD license or the GPL-2 (or later)
|
2010-05-04 01:23:20 +08:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
|
|
|
|
|
|
/* void *strcmp(char *s1, const char *s2);
|
|
|
|
|
* R0 = address (s1)
|
|
|
|
|
* R1 = address (s2)
|
|
|
|
|
*
|
|
|
|
|
* Returns an integer less than, equal to, or greater than zero if s1
|
|
|
|
|
* (or the first n bytes thereof) is found, respectively, to be less
|
|
|
|
|
* than, to match, or be greater than s2.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_STRCMP_L1
|
|
|
|
|
.section .l1.text
|
|
|
|
|
#else
|
|
|
|
|
.text
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
.align 2
|
|
|
|
|
|
|
|
|
|
ENTRY(_strcmp)
|
|
|
|
|
P0 = R0 ; /* s1 */
|
|
|
|
|
P1 = R1 ; /* s2 */
|
|
|
|
|
|
|
|
|
|
1:
|
|
|
|
|
R0 = B[P0++] (Z); /* get *s1 */
|
|
|
|
|
R1 = B[P1++] (Z); /* get *s2 */
|
|
|
|
|
CC = R0 == R1; /* compare a byte */
|
|
|
|
|
if ! cc jump 2f; /* not equal, break out */
|
|
|
|
|
CC = R0; /* at end of s1? */
|
|
|
|
|
if cc jump 1b (bp); /* no, keep going */
|
|
|
|
|
jump.s 3f; /* strings are equal */
|
|
|
|
|
2:
|
|
|
|
|
R0 = R0 - R1; /* *s1 - *s2 */
|
|
|
|
|
3:
|
|
|
|
|
RTS;
|
|
|
|
|
|
|
|
|
|
ENDPROC(_strcmp)
|
