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