diff options
Diffstat (limited to 'gcc-4.8.1/libatomic/fop_n.c')
-rw-r--r-- | gcc-4.8.1/libatomic/fop_n.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/gcc-4.8.1/libatomic/fop_n.c b/gcc-4.8.1/libatomic/fop_n.c deleted file mode 100644 index 5e4b224aa..000000000 --- a/gcc-4.8.1/libatomic/fop_n.c +++ /dev/null @@ -1,200 +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> - - -/* This file is included multiple times with required defines: - NAME the name of the operation that we're implementing; - OP a two-operand functional macro the implements the operation. -*/ - - -/* If we support the builtin, just use it. */ -#if !DONE && SIZE(HAVE_ATOMIC_FETCH_OP) -UTYPE -SIZE(C2(libat_fetch_,NAME)) (UTYPE *mptr, UTYPE opval, int smodel) -{ - if (maybe_specialcase_relaxed(smodel)) - return C2(__atomic_fetch_,NAME) (mptr, opval, __ATOMIC_RELAXED); - else if (maybe_specialcase_acqrel(smodel)) - return C2(__atomic_fetch_,NAME) (mptr, opval, __ATOMIC_ACQ_REL); - else - return C2(__atomic_fetch_,NAME) (mptr, opval, __ATOMIC_SEQ_CST); -} - -UTYPE -SIZE(C3(libat_,NAME,_fetch)) (UTYPE *mptr, UTYPE opval, int smodel) -{ - if (maybe_specialcase_relaxed(smodel)) - return C3(__atomic_,NAME,_fetch) (mptr, opval, __ATOMIC_RELAXED); - else if (maybe_specialcase_acqrel(smodel)) - return C3(__atomic_,NAME,_fetch) (mptr, opval, __ATOMIC_ACQ_REL); - else - return C3(__atomic_,NAME,_fetch) (mptr, opval, __ATOMIC_SEQ_CST); -} - -#define DONE 1 -#endif /* HAVE_ATOMIC_FETCH_OP */ - - -#if !DONE && defined(atomic_compare_exchange_n) -UTYPE -SIZE(C2(libat_fetch_,NAME)) (UTYPE *mptr, UTYPE opval, int smodel) -{ - UTYPE oldval, t; - - pre_barrier (smodel); - - oldval = *mptr; - do - { - t = OP(oldval, opval); - } - while (!atomic_compare_exchange_n (mptr, &oldval, t, true, - __ATOMIC_RELAXED, __ATOMIC_RELAXED)); - - post_barrier (smodel); - return oldval; -} - -UTYPE -SIZE(C3(libat_,NAME,_fetch)) (UTYPE *mptr, UTYPE opval, int smodel) -{ - UTYPE oldval, t; - - pre_barrier (smodel); - - oldval = *mptr; - do - { - t = OP(oldval, opval); - } - while (!atomic_compare_exchange_n (mptr, &oldval, t, true, - __ATOMIC_RELAXED, __ATOMIC_RELAXED)); - - post_barrier (smodel); - return t; -} - -#define DONE 1 -#endif /* atomic_compare_exchange_n */ - - -/* If this type is no larger than word-sized, fall back to a word-sized - compare-and-swap loop. */ -#if !DONE && N < WORDSIZE && defined(atomic_compare_exchange_w) -UTYPE -SIZE(C2(libat_fetch_,NAME)) (UTYPE *mptr, UTYPE opval, int smodel) -{ - UWORD mask, shift, woldval, wopval, t, *wptr; - - pre_barrier (smodel); - - wptr = (UWORD *)mptr; - shift = 0; - mask = -1; - - wopval = (UWORD)opval << shift; - woldval = __atomic_load_n (wptr, __ATOMIC_RELAXED); - do - { - t = (woldval & ~mask) | (OP(woldval, wopval) & mask); - } - while (!atomic_compare_exchange_w (wptr, &woldval, t, true, - __ATOMIC_RELAXED, __ATOMIC_RELAXED)); - - post_barrier (smodel); - return woldval >> shift; -} - -UTYPE -SIZE(C3(libat_,NAME,_fetch)) (UTYPE *mptr, UTYPE opval, int smodel) -{ - UWORD mask, shift, woldval, wopval, t, *wptr; - - pre_barrier (smodel); - - wptr = (UWORD *)mptr; - shift = 0; - mask = -1; - - wopval = (UWORD)opval << shift; - woldval = __atomic_load_n (wptr, __ATOMIC_RELAXED); - do - { - t = (woldval & ~mask) | (OP(woldval, wopval) & mask); - } - while (!atomic_compare_exchange_w (wptr, &woldval, t, true, - __ATOMIC_RELAXED, __ATOMIC_RELAXED)); - - post_barrier (smodel); - return t >> shift; -} - -#define DONE 1 -#endif /* atomic_compare_exchange_w */ - - -/* Otherwise, fall back to some sort of protection mechanism. */ -#if !DONE -UTYPE -SIZE(C2(libat_fetch_,NAME)) (UTYPE *mptr, UTYPE opval, int smodel UNUSED) -{ - UTYPE ret; - UWORD magic; - - pre_seq_barrier (smodel); - magic = protect_start (mptr); - - ret = *mptr; - *mptr = OP(ret, opval); - - protect_end (mptr, magic); - post_seq_barrier (smodel); - - return ret; -} - -UTYPE -SIZE(C3(libat_,NAME,_fetch)) (UTYPE *mptr, UTYPE opval, int smodel UNUSED) -{ - UTYPE ret; - UWORD magic; - - pre_seq_barrier (smodel); - magic = protect_start (mptr); - - ret = OP (*mptr, opval); - *mptr = ret; - - protect_end (mptr, magic); - post_seq_barrier (smodel); - - return ret; -} -#endif - -EXPORT_ALIAS (SIZE(C2(fetch_,NAME))); -EXPORT_ALIAS (SIZE(C2(NAME,_fetch))); |