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