Mercurial > hg > CbC > CbC_gcc
view libatomic/config/x86/host-config.h @ 120:f93fa5091070
fix conv1.c
author | mir3636 |
---|---|
date | Thu, 08 Mar 2018 14:53:42 +0900 |
parents | 04ced10e8804 |
children | 84e7813d76e9 |
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/* Copyright (C) 2012-2017 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@redhat.com>. This file is part of the GNU Atomic Library (libatomic). Libatomic 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 of the License, or (at your option) any later version. Libatomic 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/>. */ #if HAVE_IFUNC #include <cpuid.h> extern unsigned int libat_feat1_ecx HIDDEN; extern unsigned int libat_feat1_edx HIDDEN; #ifdef __x86_64__ # define IFUNC_COND_1 (libat_feat1_ecx & bit_CMPXCHG16B) #else # define IFUNC_COND_1 (libat_feat1_edx & bit_CMPXCHG8B) #endif #ifdef __x86_64__ # define IFUNC_NCOND(N) (N == 16) #else # define IFUNC_NCOND(N) (N == 8) #endif #ifdef __x86_64__ # undef MAYBE_HAVE_ATOMIC_CAS_16 # define MAYBE_HAVE_ATOMIC_CAS_16 IFUNC_COND_1 # undef MAYBE_HAVE_ATOMIC_EXCHANGE_16 # define MAYBE_HAVE_ATOMIC_EXCHANGE_16 IFUNC_COND_1 # undef MAYBE_HAVE_ATOMIC_LDST_16 # define MAYBE_HAVE_ATOMIC_LDST_16 IFUNC_COND_1 /* Since load and store are implemented with CAS, they are not fast. */ # undef FAST_ATOMIC_LDST_16 # define FAST_ATOMIC_LDST_16 0 # if IFUNC_ALT == 1 # undef HAVE_ATOMIC_CAS_16 # define HAVE_ATOMIC_CAS_16 1 # endif #else # undef MAYBE_HAVE_ATOMIC_CAS_8 # define MAYBE_HAVE_ATOMIC_CAS_8 IFUNC_COND_1 # undef MAYBE_HAVE_ATOMIC_EXCHANGE_8 # define MAYBE_HAVE_ATOMIC_EXCHANGE_8 IFUNC_COND_1 # undef MAYBE_HAVE_ATOMIC_LDST_8 # define MAYBE_HAVE_ATOMIC_LDST_8 IFUNC_COND_1 # if IFUNC_ALT == 1 # undef HAVE_ATOMIC_CAS_8 # define HAVE_ATOMIC_CAS_8 1 # endif #endif #if defined(__x86_64__) && N == 16 && IFUNC_ALT == 1 static inline bool atomic_compare_exchange_n (UTYPE *mptr, UTYPE *eptr, UTYPE newval, bool weak_p UNUSED, int sm UNUSED, int fm UNUSED) { UTYPE cmpval = *eptr; UTYPE oldval = __sync_val_compare_and_swap_16 (mptr, cmpval, newval); if (oldval == cmpval) return true; *eptr = oldval; return false; } # define atomic_compare_exchange_n atomic_compare_exchange_n #endif /* Have CAS 16 */ #endif /* HAVE_IFUNC */ #include_next <host-config.h>