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a945c346 | 1 | /* Copyright (C) 2023-2024 Free Software Foundation, Inc. |
e1e127de ZJ |
2 | Contributed by Jun Zhang <jun.zhang@intel.com>. |
3 | ||
4 | This file is part of the GNU Offloading and Multi Processing Library | |
5 | (libgomp). | |
6 | ||
7 | Libgomp is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
14 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
15 | more details. | |
16 | ||
17 | Under Section 7 of GPL version 3, you are granted additional | |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
25 | ||
26 | #ifndef GOMP_SPINCOUNT_H | |
27 | #define GOMP_SPINCOUNT_H 1 | |
28 | ||
29 | #ifdef __x86_64__ | |
30 | #include "cpuid.h" | |
31 | #include "libgomp.h" | |
32 | ||
33 | /* Only for x86 hybrid platform */ | |
34 | static inline void do_adjust_default_spincount (void) | |
35 | { | |
36 | unsigned int eax, ebx, ecx, edx; | |
37 | if (__get_cpuid_count (7, 0, &eax, &ebx, &ecx, &edx) | |
38 | /* CPUID.07H.0H:EDX[15] Hybrid. */ | |
39 | && ((edx >> 15) & 1)) | |
40 | gomp_spin_count_var = 1LL; | |
41 | } | |
42 | #else | |
43 | ||
44 | static inline void do_adjust_default_spincount (void) | |
45 | { | |
46 | } | |
47 | #endif | |
48 | ||
49 | #endif /* GOMP_SPINCOUNT_H */ |