| Robin Getz | 479ba60 | 2010-05-03 17:23:20 +0000 | [diff] [blame] | 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 *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 | |
| 26 | ENTRY(_strcmp) |
| 27 | P0 = R0 ; /* s1 */ |
| 28 | P1 = R1 ; /* s2 */ |
| 29 | |
| 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 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 */ |
| 38 | 2: |
| 39 | R0 = R0 - R1; /* *s1 - *s2 */ |
| 40 | 3: |
| 41 | RTS; |
| 42 | |
| 43 | ENDPROC(_strcmp) |