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author | Dan Albert <danalbert@google.com> | 2015-10-13 16:28:19 -0700 |
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committer | Dan Albert <danalbert@google.com> | 2015-10-13 16:28:19 -0700 |
commit | a8c075f72b231c37823661ba0d7d082a21cd39d9 (patch) | |
tree | 395aa3b848d56037292e50466643453485073018 /gcc-4.8/libatomic/load_n.c | |
parent | 5aff2e0142aca13849b4e51de503e71d5010efa6 (diff) | |
download | toolchain_gcc-a8c075f72b231c37823661ba0d7d082a21cd39d9.tar.gz toolchain_gcc-a8c075f72b231c37823661ba0d7d082a21cd39d9.tar.bz2 toolchain_gcc-a8c075f72b231c37823661ba0d7d082a21cd39d9.zip |
Remove gcc-4.8.
Change-Id: Iee9c6985c613f58c82e33a91722d371579eb290f
Diffstat (limited to 'gcc-4.8/libatomic/load_n.c')
-rw-r--r-- | gcc-4.8/libatomic/load_n.c | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/gcc-4.8/libatomic/load_n.c b/gcc-4.8/libatomic/load_n.c deleted file mode 100644 index 8861bf4a2..000000000 --- a/gcc-4.8/libatomic/load_n.c +++ /dev/null @@ -1,115 +0,0 @@ -/* Copyright (C) 2012-2013 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/>. */ - -#include "libatomic_i.h" - - -/* If we support the builtin, just use it. */ -#if !DONE && SIZE(HAVE_ATOMIC_LDST) -UTYPE -SIZE(libat_load) (UTYPE *mptr, int smodel) -{ - if (maybe_specialcase_relaxed(smodel)) - return __atomic_load_n (mptr, __ATOMIC_RELAXED); - else if (maybe_specialcase_acqrel(smodel)) - /* Note that REL and ACQ_REL are not valid for loads. */ - return __atomic_load_n (mptr, __ATOMIC_ACQUIRE); - else - return __atomic_load_n (mptr, __ATOMIC_SEQ_CST); -} - -#define DONE 1 -#endif /* HAVE_ATOMIC_LOAD */ - - -/* If we have compare-and-swap, use it to swap 0 with 0 and as a side - effect load the original value. */ -#if !DONE && defined(atomic_compare_exchange_n) -UTYPE -SIZE(libat_load) (UTYPE *mptr, int smodel) -{ - UTYPE t = 0; - - if (maybe_specialcase_relaxed(smodel)) - atomic_compare_exchange_n (mptr, &t, 0, true, - __ATOMIC_RELAXED, __ATOMIC_RELAXED); - else if (maybe_specialcase_acqrel(smodel)) - atomic_compare_exchange_n (mptr, &t, 0, true, - __ATOMIC_ACQ_REL, __ATOMIC_ACQ_REL); - else - atomic_compare_exchange_n (mptr, &t, 0, true, - __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); - - return t; -} - -#define DONE 1 -#endif /* atomic_compare_exchange_n */ - - -/* Similar, but only assume a word-sized compare-and-swap. */ -#if !DONE && N < WORDSIZE && defined(atomic_compare_exchange_w) -UTYPE -SIZE(libat_load) (UTYPE *mptr, int smodel) -{ - UWORD shift, t, *wptr; - - pre_barrier (smodel); - - wptr = (UWORD *)((uintptr_t)mptr & -WORDSIZE); - shift = (((uintptr_t)mptr % WORDSIZE) * CHAR_BIT) ^ SIZE(INVERT_MASK); - - /* Exchange 0 with 0, placing the old value of *WPTR in T. */ - t = 0; - atomic_compare_exchange_w (wptr, &t, 0); - - post_barrier (smodel); - return t >> shift; -} - -#define DONE 1 -#endif /* HAVE_ATOMIC_CAS && N < WORDSIZE */ - - -/* Otherwise, fall back to some sort of protection mechanism. */ -#if !DONE -UTYPE -SIZE(libat_load) (UTYPE *mptr, int smodel) -{ - UTYPE ret; - UWORD magic; - - pre_seq_barrier (smodel); - magic = protect_start (mptr); - - ret = *mptr; - - protect_end (mptr, magic); - post_seq_barrier (smodel); - - return ret; -} -#endif - -EXPORT_ALIAS (SIZE(load)); |