43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* Copyright (C) 2012-2020 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Atomic Library (libatomic).
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Libatomic is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libatomic 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 FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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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 "libatomic_i.h"
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#if HAVE_IFUNC
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unsigned int __libat_feat1;
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unsigned int
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__libat_feat1_init (void)
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{
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unsigned int eax, ebx, ecx, edx;
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FEAT1_REGISTER = 0;
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__get_cpuid (1, &eax, &ebx, &ecx, &edx);
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/* See the load in load_feat1. */
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__atomic_store_n (&__libat_feat1, FEAT1_REGISTER, __ATOMIC_RELAXED);
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return FEAT1_REGISTER;
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}
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#endif /* HAVE_IFUNC */
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