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99dee823 | 1 | /* Copyright (C) 2012-2021 Free Software Foundation, Inc. |
48310492 RH |
2 | Contributed by Richard Henderson <rth@redhat.com>. |
3 | ||
4 | This file is part of the GNU Atomic Library (libatomic). | |
5 | ||
6 | Libatomic is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | more details. | |
15 | ||
16 | Under Section 7 of GPL version 3, you are granted additional | |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | You should have received a copy of the GNU General Public License and | |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
24 | ||
25 | #include "libatomic_i.h" | |
26 | ||
27 | #if HAVE_IFUNC | |
28 | ||
cb3c90cc | 29 | unsigned int __libat_feat1; |
48310492 | 30 | |
cb3c90cc FW |
31 | unsigned int |
32 | __libat_feat1_init (void) | |
48310492 | 33 | { |
cb3c90cc FW |
34 | unsigned int eax, ebx, ecx, edx; |
35 | FEAT1_REGISTER = 0; | |
36 | __get_cpuid (1, &eax, &ebx, &ecx, &edx); | |
37 | /* See the load in load_feat1. */ | |
38 | __atomic_store_n (&__libat_feat1, FEAT1_REGISTER, __ATOMIC_RELAXED); | |
39 | return FEAT1_REGISTER; | |
48310492 RH |
40 | } |
41 | ||
42 | #endif /* HAVE_IFUNC */ |