/usr/s390x-linux-gnu/include/bits/string.h is in libc6-dev-s390x-cross 2.23-0ubuntu3cross1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 | /* Optimized, inlined string functions. S/390 version.
Copyright (C) 2000-2016 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _STRING_H
# error "Never use <bits/string.h> directly; include <string.h> instead."
#endif
/* Use the unaligned string inline ABI. */
#define _STRING_INLINE_unaligned 1
/* We only provide optimizations if the user selects them and if
GNU CC is used. */
#if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \
&& defined __GNUC__ && __GNUC__ >= 2
#ifndef __STRING_INLINE
# ifndef __extern_inline
# define __STRING_INLINE inline
# else
# define __STRING_INLINE __extern_inline
# endif
#endif
#define _HAVE_STRING_ARCH_strlen 1
#ifndef _FORCE_INLINES
#define strlen(str) __strlen_g ((str))
__STRING_INLINE size_t __strlen_g (const char *) __asm__ ("strlen");
__STRING_INLINE size_t
__strlen_g (const char *__str)
{
char *__ptr, *__tmp;
__ptr = (char *) 0;
__tmp = (char *) __str;
__asm__ __volatile__ (" la 0,0\n"
"0: srst %0,%1\n"
" jo 0b\n"
: "+&a" (__ptr), "+&a" (__tmp) :
: "cc", "memory", "0" );
return (size_t) (__ptr - __str);
}
#endif
/* Copy SRC to DEST. */
#define _HAVE_STRING_ARCH_strcpy 1
#ifndef _FORCE_INLINES
#define strcpy(dest, src) __strcpy_g ((dest), (src))
__STRING_INLINE char *__strcpy_g (char *, const char *) __asm__ ("strcpy");
__STRING_INLINE char *
__strcpy_g (char *__dest, const char *__src)
{
char *tmp = __dest;
__asm__ __volatile__ (" la 0,0\n"
"0: mvst %0,%1\n"
" jo 0b"
: "+&a" (__dest), "+&a" (__src) :
: "cc", "memory", "0" );
return tmp;
}
#endif
#define _HAVE_STRING_ARCH_strncpy 1
#ifndef _FORCE_INLINES
#define strncpy(dest, src, n) __strncpy_g ((dest), (src), (n))
__STRING_INLINE char *__strncpy_g (char *, const char *, size_t)
__asm__ ("strncpy");
__STRING_INLINE char *
__strncpy_g (char *__dest, const char *__src, size_t __n)
{
char *__ret = __dest;
char *__ptr;
size_t __diff;
if (__n > 0) {
__diff = (size_t) (__dest - __src);
__ptr = (char *) __src;
__asm__ __volatile__ (" j 1f\n"
"0: la %0,1(%0)\n"
"1: icm 0,1,0(%0)\n"
" stc 0,0(%2,%0)\n"
" jz 3f\n"
#if defined(__s390x__)
" brctg %1,0b\n"
#else
" brct %1,0b\n"
#endif
" j 4f\n"
"2: la %0,1(%0)\n"
" stc 0,0(%2,%0)\n"
#if defined(__s390x__)
"3: brctg %1,2b\n"
#else
"3: brct %1,2b\n"
#endif
"4:"
: "+&a" (__ptr), "+&a" (__n) : "a" (__diff)
: "cc", "memory", "0" );
}
return __ret;
}
#endif
/* Append SRC onto DEST. */
#define _HAVE_STRING_ARCH_strcat 1
#ifndef _FORCE_INLINES
#define strcat(dest, src) __strcat_g ((dest), (src))
__STRING_INLINE char *__strcat_g (char *, const char *) __asm__ ("strcat");
__STRING_INLINE char *
__strcat_g (char *__dest, const char *__src)
{
char *__ret = __dest;
char *__ptr, *__tmp;
/* Move __ptr to the end of __dest. */
__ptr = (char *) 0;
__tmp = __dest;
__asm__ __volatile__ (" la 0,0\n"
"0: srst %0,%1\n"
" jo 0b\n"
: "+&a" (__ptr), "+&a" (__tmp) :
: "cc", "0" );
/* Now do the copy. */
__asm__ __volatile__ (" la 0,0\n"
"0: mvst %0,%1\n"
" jo 0b"
: "+&a" (__ptr), "+&a" (__src) :
: "cc", "memory", "0" );
return __ret;
}
#endif
/* Append no more than N characters from SRC onto DEST. */
#define _HAVE_STRING_ARCH_strncat 1
#ifndef _FORCE_INLINES
#define strncat(dest, src, n) __strncat_g ((dest), (src), (n))
__STRING_INLINE char *__strncat_g (char *, const char *, size_t)
__asm__ ("strncat");
__STRING_INLINE char *
__strncat_g (char *__dest, const char *__src, size_t __n)
{
char *__ret = __dest;
char *__ptr, *__tmp;
size_t __diff;
if (__n > 0) {
/* Move __ptr to the end of __dest. */
__ptr = (char *) 0;
__tmp = __dest;
__asm__ __volatile__ (" la 0,0\n"
"0: srst %0,%1\n"
" jo 0b\n"
: "+&a" (__ptr), "+&a" (__tmp) :
: "cc", "memory", "0" );
__diff = (size_t) (__ptr - __src);
__tmp = (char *) __src;
__asm__ __volatile__ (" j 1f\n"
"0: la %0,1(%0)\n"
"1: icm 0,1,0(%0)\n"
" stc 0,0(%2,%0)\n"
" jz 2f\n"
#if defined(__s390x__)
" brctg %1,0b\n"
#else
" brct %1,0b\n"
#endif
" slr 0,0\n"
" stc 0,1(%2,%0)\n"
"2:"
: "+&a" (__tmp), "+&a" (__n) : "a" (__diff)
: "cc", "memory", "0" );
}
return __ret;
}
#endif
/* Search N bytes of S for C. */
#define _HAVE_STRING_ARCH_memchr 1
#ifndef _FORCE_INLINES
__STRING_INLINE void *
memchr (const void *__str, int __c, size_t __n)
{
char *__ptr, *__tmp;
__tmp = (char *) __str;
__ptr = (char *) __tmp + __n;
__asm__ __volatile__ (" lhi 0,0xff\n"
" nr 0,%2\n"
"0: srst %0,%1\n"
" jo 0b\n"
" brc 13,1f\n"
" la %0,0\n"
"1:"
: "+&a" (__ptr), "+&a" (__tmp) : "d" (__c)
: "cc", "memory", "0" );
return __ptr;
}
#endif
/* Compare S1 and S2. */
#define _HAVE_STRING_ARCH_strcmp 1
#ifndef _FORCE_INLINES
__STRING_INLINE int
strcmp (const char *__s1, const char *__s2)
{
char *__p1, *__p2;
int __ret;
__p1 = (char *) __s1;
__p2 = (char *) __s2;
__asm__ __volatile__ (" slr 0,0\n"
"0: clst %1,%2\n"
" jo 0b\n"
" ipm %0\n"
" srl %0,28"
: "=d" (__ret), "+&a" (__p1), "+&a" (__p2) :
: "cc", "memory", "0" );
__ret = (__ret == 0) ? 0 : (__ret == 1) ? -1 : 1;
return __ret;
}
#endif
#endif /* Use string inlines && GNU CC. */
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