/* * Copyright (c) 2012-2014 ARM Ltd * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the company may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* This version is only used when we want a very basic Thumb1 implementation or for size, otherwise we use the base ARMv4 version. This is also suitable for ARMv6-M. */ .thumb .syntax unified .arch armv4t .eabi_attribute Tag_also_compatible_with, "\006\013" /* ARMv6-M. */ .eabi_attribute Tag_ARM_ISA_use, 0 def_fn strcmp .cfi_sections .debug_frame .cfi_startproc 1: ldrb r2, [r0] ldrb r3, [r1] cmp r2, #0 beq 2f adds r0, r0, #1 adds r1, r1, #1 cmp r2, r3 beq 1b 2: subs r0, r2, r3 bx lr .cfi_endproc .size strcmp, . - strcmp