1 /* x86 version of hardware capability information handling macros.
2 Copyright (C) 2017-2021 Free Software Foundation, Inc.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #ifndef _DL_HWCAP_H
19 #define _DL_HWCAP_H
20
21 #if IS_IN (ldconfig)
22 /* Since ldconfig processes both i386 and x86-64 libraries, it needs
23 to cover all platforms and hardware capabilities. */
24 # define HWCAP_PLATFORMS_START 0
25 # define HWCAP_PLATFORMS_COUNT 4
26 # define HWCAP_START 0
27 # define HWCAP_COUNT 3
28 # define HWCAP_IMPORTANT \
29 (HWCAP_X86_SSE2 | HWCAP_X86_64 | HWCAP_X86_AVX512_1)
30 #elif defined __x86_64__
31 /* For 64 bit, only cover x86-64 platforms and capabilities. */
32 # define HWCAP_PLATFORMS_START 2
33 # define HWCAP_PLATFORMS_COUNT 4
34 # define HWCAP_START 1
35 # define HWCAP_COUNT 3
36 # define HWCAP_IMPORTANT (HWCAP_X86_64 | HWCAP_X86_AVX512_1)
37 #else
38 /* For 32 bit, only cover i586, i686 and SSE2. */
39 # define HWCAP_PLATFORMS_START 0
40 # define HWCAP_PLATFORMS_COUNT 2
41 # define HWCAP_START 0
42 # define HWCAP_COUNT 1
43 # define HWCAP_IMPORTANT (HWCAP_X86_SSE2)
44 #endif
45
46 enum
47 {
48 HWCAP_X86_SSE2 = 1 << 0,
49 HWCAP_X86_64 = 1 << 1,
50 HWCAP_X86_AVX512_1 = 1 << 2
51 };
52
53 static inline const char *
54 __attribute__ ((unused))
_dl_hwcap_string(int idx)55 _dl_hwcap_string (int idx)
56 {
57 return GLRO(dl_x86_hwcap_flags)[idx];
58 };
59
60 static inline int
61 __attribute__ ((unused, always_inline))
_dl_string_hwcap(const char * str)62 _dl_string_hwcap (const char *str)
63 {
64 int i;
65
66 for (i = HWCAP_START; i < HWCAP_COUNT; i++)
67 {
68 if (strcmp (str, GLRO(dl_x86_hwcap_flags)[i]) == 0)
69 return i;
70 }
71 return -1;
72 };
73
74 /* We cannot provide a general printing function. */
75 #define _dl_procinfo(type, word) -1
76
77 #endif /* dl-hwcap.h */
78