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 <picolibc.h>
32
33#include "machine/acle-compat.h"
34
35#ifdef __ARM_BIG_ENDIAN
36#define S2LO lsl
37#define S2LOEQ lsleq
38#define S2HI lsr
39#define MSB 0x000000ff
40#define LSB 0xff000000
41#define BYTE0_OFFSET 24
42#define BYTE1_OFFSET 16
43#define BYTE2_OFFSET 8
44#define BYTE3_OFFSET 0
45#else /* not  __ARM_BIG_ENDIAN */
46#define S2LO lsr
47#define S2LOEQ lsreq
48#define S2HI lsl
49#define BYTE0_OFFSET 0
50#define BYTE1_OFFSET 8
51#define BYTE2_OFFSET 16
52#define BYTE3_OFFSET 24
53#define MSB 0xff000000
54#define LSB 0x000000ff
55#endif /* not  __ARM_BIG_ENDIAN */
56
57	.macro def_fn f p2align=0
58	.text
59	.p2align \p2align
60	.global \f
61	.type \f, %function
62\f:
63	.endm
64
65#if defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED) \
66	|| (__ARM_ARCH_ISA_THUMB == 1 && !__ARM_ARCH_ISA_ARM)
67
68# if defined (__thumb__) && !defined (__thumb2__)
69/* Thumb1 only variant.  If size is preferred, use strcmp-armv4t.S.
70   If speed is preferred, the strcmp function in strcmp-armv6m.S
71   will be used.  */
72
73#  if defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED)
74#   include "strcmp-armv4t.S"
75#  else
76#   include "strcmp-armv6m.S"
77#  endif
78
79# else
80#  include "strcmp-arm-tiny.S"
81# endif
82
83#elif __ARM_ARCH_ISA_THUMB == 2
84
85# ifdef __ARM_FEATURE_SIMD32
86#  include "strcmp-armv7.S"
87# else
88#  include "strcmp-armv7m.S"
89# endif
90
91#elif __ARM_ARCH >= 6
92
93# include "strcmp-armv6.S"
94
95#else
96
97# include "strcmp-armv4.S"
98
99#endif
100