/* | |
* Copyright 2005-2009 Analog Devices Inc. | |
* | |
* Licensed under the ADI BSD license or the GPL-2 (or later) | |
*/ | |
#include <linux/linkage.h> | |
/* void *memchr(const void *s, int c, size_t n); | |
* R0 = address (s) | |
* R1 = sought byte (c) | |
* R2 = count (n) | |
* | |
* Returns pointer to located character. | |
*/ | |
.text | |
.align 2 | |
ENTRY(_memchr) | |
P0 = R0; /* P0 = address */ | |
P2 = R2; /* P2 = count */ | |
R1 = R1.B(Z); | |
CC = R2 == 0; | |
IF CC JUMP .Lfailed; | |
.Lbytes: | |
LSETUP (.Lbyte_loop_s, .Lbyte_loop_e) LC0=P2; | |
.Lbyte_loop_s: | |
R3 = B[P0++](Z); | |
CC = R3 == R1; | |
IF CC JUMP .Lfound; | |
.Lbyte_loop_e: | |
NOP; | |
.Lfailed: | |
R0=0; | |
RTS; | |
.Lfound: | |
R0 = P0; | |
R0 += -1; | |
RTS; | |
ENDPROC(_memchr) |