12b8cac81SCatalin Marinas/* 22b8cac81SCatalin Marinas * Based on arch/arm/lib/strrchr.S 32b8cac81SCatalin Marinas * 42b8cac81SCatalin Marinas * Copyright (C) 1995-2000 Russell King 52b8cac81SCatalin Marinas * Copyright (C) 2013 ARM Ltd. 62b8cac81SCatalin Marinas * 72b8cac81SCatalin Marinas * This program is free software; you can redistribute it and/or modify 82b8cac81SCatalin Marinas * it under the terms of the GNU General Public License version 2 as 92b8cac81SCatalin Marinas * published by the Free Software Foundation. 102b8cac81SCatalin Marinas * 112b8cac81SCatalin Marinas * This program is distributed in the hope that it will be useful, 122b8cac81SCatalin Marinas * but WITHOUT ANY WARRANTY; without even the implied warranty of 132b8cac81SCatalin Marinas * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 142b8cac81SCatalin Marinas * GNU General Public License for more details. 152b8cac81SCatalin Marinas * 162b8cac81SCatalin Marinas * You should have received a copy of the GNU General Public License 172b8cac81SCatalin Marinas * along with this program. If not, see <http://www.gnu.org/licenses/>. 182b8cac81SCatalin Marinas */ 192b8cac81SCatalin Marinas 202b8cac81SCatalin Marinas#include <linux/linkage.h> 212b8cac81SCatalin Marinas#include <asm/assembler.h> 222b8cac81SCatalin Marinas 232b8cac81SCatalin Marinas/* 242b8cac81SCatalin Marinas * Find the last occurrence of a character in a string. 252b8cac81SCatalin Marinas * 262b8cac81SCatalin Marinas * Parameters: 272b8cac81SCatalin Marinas * x0 - str 282b8cac81SCatalin Marinas * x1 - c 292b8cac81SCatalin Marinas * Returns: 302b8cac81SCatalin Marinas * x0 - address of last occurrence of 'c' or 0 312b8cac81SCatalin Marinas */ 3219a2ca0fSAndrey RyabininWEAK(strrchr) 332b8cac81SCatalin Marinas mov x3, #0 342b8cac81SCatalin Marinas and w1, w1, #0xff 352b8cac81SCatalin Marinas1: ldrb w2, [x0], #1 362b8cac81SCatalin Marinas cbz w2, 2f 372b8cac81SCatalin Marinas cmp w2, w1 382b8cac81SCatalin Marinas b.ne 1b 392b8cac81SCatalin Marinas sub x3, x0, #1 402b8cac81SCatalin Marinas b 1b 412b8cac81SCatalin Marinas2: mov x0, x3 422b8cac81SCatalin Marinas ret 43fdfb69a7SRob HerringENDPIPROC(strrchr) 44