1/* 2 * Copyright (c) 2012-2014 ARM Ltd 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the company may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 22 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29/* Wrapper for the various implementations of strcmp. */ 30 31#include "arm_asm.h" 32#include "acle-compat.h" 33 34#ifdef __ARM_BIG_ENDIAN 35#define S2LO lsl 36#define S2LOEQ lsleq 37#define S2HI lsr 38#define MSB 0x000000ff 39#define LSB 0xff000000 40#define BYTE0_OFFSET 24 41#define BYTE1_OFFSET 16 42#define BYTE2_OFFSET 8 43#define BYTE3_OFFSET 0 44#else /* not __ARM_BIG_ENDIAN */ 45#define S2LO lsr 46#define S2LOEQ lsreq 47#define S2HI lsl 48#define BYTE0_OFFSET 0 49#define BYTE1_OFFSET 8 50#define BYTE2_OFFSET 16 51#define BYTE3_OFFSET 24 52#define MSB 0xff000000 53#define LSB 0x000000ff 54#endif /* not __ARM_BIG_ENDIAN */ 55 56 .macro def_fn f p2align=0 57 .text 58 .p2align \p2align 59 .global \f 60 .type \f, %function 61\f: 62 .endm 63 64#if defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED) \ 65 || (__ARM_ARCH_ISA_THUMB == 1 && !__ARM_ARCH_ISA_ARM) 66 67# if defined (__thumb__) && !defined (__thumb2__) 68/* Thumb1 only variant. If size is preferred, use strcmp-armv4t.S. 69 If speed is preferred, the strcmp function in strcmp-armv6m.S 70 will be used. */ 71 72# if defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED) 73# include "strcmp-armv4t.S" 74# else 75# include "strcmp-armv6m.S" 76# endif 77 78# else 79# include "strcmp-arm-tiny.S" 80# endif 81 82#elif __ARM_ARCH_ISA_THUMB == 2 83 84# ifdef __ARM_FEATURE_SIMD32 85# include "strcmp-armv7.S" 86# else 87# include "strcmp-armv7m.S" 88# endif 89 90#elif __ARM_ARCH >= 6 91 92# include "strcmp-armv6.S" 93 94#else 95 96# include "strcmp-armv4.S" 97 98#endif 99