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