1*d2912cb1SThomas Gleixner/* SPDX-License-Identifier: GPL-2.0-only */ 21da177e4SLinus Torvalds/* 31da177e4SLinus Torvalds * linux/arch/arm/lib/memchr.S 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Copyright (C) 1995-2000 Russell King 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * ASM optimised string functions 81da177e4SLinus Torvalds */ 91da177e4SLinus Torvalds#include <linux/linkage.h> 101da177e4SLinus Torvalds#include <asm/assembler.h> 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds .text 131da177e4SLinus Torvalds .align 5 141da177e4SLinus TorvaldsENTRY(memchr) 151da177e4SLinus Torvalds1: subs r2, r2, #1 161da177e4SLinus Torvalds bmi 2f 171da177e4SLinus Torvalds ldrb r3, [r0], #1 181da177e4SLinus Torvalds teq r3, r1 191da177e4SLinus Torvalds bne 1b 201da177e4SLinus Torvalds sub r0, r0, #1 211da177e4SLinus Torvalds2: movne r0, #0 226ebbf2ceSRussell King ret lr 2393ed3970SCatalin MarinasENDPROC(memchr) 24