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- /* Get CPU type and Features for x86 processors.
- Copyright (C) 2012-2022 Free Software Foundation, Inc.
- Contributed by Sriraman Tallam (tmsriram@google.com)
- This file is part of GCC.
- GCC is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 3, or (at your option) any later
- version.
- GCC is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
- Under Section 7 of GPL version 3, you are granted additional
- permissions described in the GCC Runtime Library Exception, version
- 3.1, as published by the Free Software Foundation.
- You should have received a copy of the GNU General Public License and
- a copy of the GCC Runtime Library Exception along with this program;
- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- <http://www.gnu.org/licenses/>. */
- #include "cpuid.h"
- #include "tsystem.h"
- #include "auto-target.h"
- #include "common/config/i386/i386-cpuinfo.h"
- #include "common/config/i386/cpuinfo.h"
- #ifdef HAVE_INIT_PRIORITY
- #define CONSTRUCTOR_PRIORITY (101)
- #else
- #define CONSTRUCTOR_PRIORITY
- #endif
- int __cpu_indicator_init (void)
- __attribute__ ((constructor CONSTRUCTOR_PRIORITY));
- struct __processor_model __cpu_model = { };
- /* We want to move away from __cpu_model in libgcc_s.so.1 and the
- size of __cpu_model is part of ABI. So, new features that don't
- fit into __cpu_model.__cpu_features[0] go into extra variables
- in libgcc.a only, preferably hidden.
- NB: Since older 386-builtins.c accesses __cpu_features2 as scalar or
- smaller array, it can only access the first few elements. */
- unsigned int __cpu_features2[SIZE_OF_CPU_FEATURES];
- /* A constructor function that is sets __cpu_model and __cpu_features with
- the right values. This needs to run only once. This constructor is
- given the highest priority and it should run before constructors without
- the priority set. However, it still runs after ifunc initializers and
- needs to be called explicitly there. */
- int __attribute__ ((constructor CONSTRUCTOR_PRIORITY))
- __cpu_indicator_init (void)
- {
- struct __processor_model2 cpu_model2;
- return cpu_indicator_init (&__cpu_model, &cpu_model2,
- __cpu_features2);
- }
- #if defined SHARED && defined USE_ELF_SYMVER
- __asm__ (".symver __cpu_indicator_init, __cpu_indicator_init@GCC_4.8.0");
- __asm__ (".symver __cpu_model, __cpu_model@GCC_4.8.0");
- #endif
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