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f267e1c9 | 1 | /* Architecture-specific glibc-hwcaps subdirectories. x86 version. |
2b778ceb | 2 | Copyright (C) 2020-2021 Free Software Foundation, Inc. |
f267e1c9 FW |
3 | This file is part of the GNU C Library. |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
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/>. */ | |
18 | ||
19 | #include <dl-hwcaps.h> | |
20 | #include <cpu-features.h> | |
d18f59bf | 21 | #include <ldsodefs.h> |
ecce11aa | 22 | #include <get-isa-level.h> |
f267e1c9 FW |
23 | |
24 | const char _dl_hwcaps_subdirs[] = "x86-64-v4:x86-64-v3:x86-64-v2"; | |
25 | enum { subdirs_count = 3 }; /* Number of components in _dl_hwcaps_subdirs. */ | |
26 | ||
27 | uint32_t | |
28 | _dl_hwcaps_subdirs_active (void) | |
29 | { | |
ff6d62e9 | 30 | const struct cpu_features *cpu_features = __get_cpu_features (); |
ecce11aa | 31 | unsigned int isa_level = get_isa_level (cpu_features); |
f267e1c9 FW |
32 | int active = 0; |
33 | ||
34 | /* Test in reverse preference order. */ | |
35 | ||
36 | /* x86-64-v2. */ | |
ecce11aa | 37 | if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V2)) |
f267e1c9 FW |
38 | return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); |
39 | ++active; | |
40 | ||
41 | /* x86-64-v3. */ | |
ecce11aa | 42 | if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V3)) |
f267e1c9 FW |
43 | return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); |
44 | ++active; | |
45 | ||
ecce11aa L |
46 | /* x86-64-v4. */ |
47 | if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V4)) | |
f267e1c9 FW |
48 | return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); |
49 | ++active; | |
50 | ||
51 | return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); | |
52 | } |