1/* Get CPU type and Features for x86 processors.
2   Copyright (C) 2012-2022 Free Software Foundation, Inc.
3   Contributed by Sriraman Tallam (tmsriram@google.com)
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 3, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24<http://www.gnu.org/licenses/>.  */
25
26#include "cpuid.h"
27#include "tsystem.h"
28#include "auto-target.h"
29#include "common/config/i386/i386-cpuinfo.h"
30#include "common/config/i386/cpuinfo.h"
31
32#ifdef HAVE_INIT_PRIORITY
33#define CONSTRUCTOR_PRIORITY (101)
34#else
35#define CONSTRUCTOR_PRIORITY
36#endif
37
38int __cpu_indicator_init (void)
39  __attribute__ ((constructor CONSTRUCTOR_PRIORITY));
40
41
42struct __processor_model __cpu_model = { };
43/* We want to move away from __cpu_model in libgcc_s.so.1 and the
44   size of __cpu_model is part of ABI.  So, new features that don't
45   fit into __cpu_model.__cpu_features[0] go into extra variables
46   in libgcc.a only, preferably hidden.
47
48   NB: Since older 386-builtins.c accesses __cpu_features2 as scalar or
49   smaller array, it can only access the first few elements.  */
50unsigned int __cpu_features2[SIZE_OF_CPU_FEATURES];
51
52/* A constructor function that is sets __cpu_model and __cpu_features with
53   the right values.  This needs to run only once.  This constructor is
54   given the highest priority and it should run before constructors without
55   the priority set.  However, it still runs after ifunc initializers and
56   needs to be called explicitly there.  */
57
58int __attribute__ ((constructor CONSTRUCTOR_PRIORITY))
59__cpu_indicator_init (void)
60{
61  struct __processor_model2 cpu_model2;
62  return cpu_indicator_init (&__cpu_model, &cpu_model2,
63			     __cpu_features2);
64}
65
66#if defined SHARED && defined USE_ELF_SYMVER
67__asm__ (".symver __cpu_indicator_init, __cpu_indicator_init@GCC_4.8.0");
68__asm__ (".symver __cpu_model, __cpu_model@GCC_4.8.0");
69#endif
70