| /* Get CPU type and Features for x86 processors. |
| Copyright (C) 2012-2021 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 |