1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun/* 3*4882a593Smuzhiyun * linux/arch/arm/lib/memchr.S 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 1995-2000 Russell King 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * ASM optimised string functions 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun#include <linux/linkage.h> 10*4882a593Smuzhiyun#include <asm/assembler.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun .text 13*4882a593Smuzhiyun .align 5 14*4882a593SmuzhiyunENTRY(memchr) 15*4882a593Smuzhiyun1: subs r2, r2, #1 16*4882a593Smuzhiyun bmi 2f 17*4882a593Smuzhiyun ldrb r3, [r0], #1 18*4882a593Smuzhiyun teq r3, r1 19*4882a593Smuzhiyun bne 1b 20*4882a593Smuzhiyun sub r0, r0, #1 21*4882a593Smuzhiyun2: movne r0, #0 22*4882a593Smuzhiyun ret lr 23*4882a593SmuzhiyunENDPROC(memchr) 24