1 /* Compute hash value for given string according to ELF standard.
2 Copyright (C) 1998-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
23 /* This is the hashing function specified by the ELF ABI. It is highly
24 optimized for the PII processors. Though it will run on i586 it
25 would be much slower than the generic C implementation. So don't
28 __attribute__ ((unused
))
29 _dl_elf_hash (const char *name
)
40 "movzbl 1(%1), %2\n\t"
44 "movzbl 2(%1), %2\n\t"
48 "movzbl 3(%1), %2\n\t"
52 "movzbl 4(%1), %2\n\t"
61 "movl $0xf0000000, %3\n\t"
65 "andl $0x0fffffff, %0\n\t"
72 : "=&r" (result
), "=r" (name
), "=&c" (temp0
), "=&r" (temp1
)
73 : "0" (0), "1" ((const unsigned char *) name
));
78 #endif /* dl-hash.h */