diff options
Diffstat (limited to 'libatomic/gload.c')
| -rw-r--r-- | libatomic/gload.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/libatomic/gload.c b/libatomic/gload.c deleted file mode 100644 index 98e1a7edb9..0000000000 --- a/libatomic/gload.c +++ /dev/null @@ -1,100 +0,0 @@ -/* 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/>. */ - -#include "libatomic_i.h" - - -/* If we natively support the load, and if we're unconcerned with extra - barriers (e.g. fully in-order cpu for which barriers are a nop), then - go ahead and expand the operation inline. */ -#if !defined(WANT_SPECIALCASE_RELAXED) && !defined(__OPTIMIZE_SIZE__) -# define EXACT_INLINE(N, DEST, SRC, DONE) \ - if (C2(HAVE_ATOMIC_LDST_,N)) \ - { \ - DEST = __atomic_load_n (SRC, __ATOMIC_SEQ_CST); \ - DONE; \ - } -#else -# define EXACT_INLINE(N, DEST, SRC, DONE) -#endif - - -#define EXACT_(N, DEST, SRC, DONE) \ - do { \ - EXACT_INLINE (N, DEST, SRC, DONE); \ - DEST = C3(local_,load_,N) (SRC, smodel); \ - DONE; \ - } while (0) - -#define EXACT(N) \ - do { \ - if (!C2(HAVE_INT,N)) break; \ - if ((uintptr_t)mptr & (N - 1)) break; \ - EXACT_(N, *PTR(N,rptr), PTR(N,mptr), return); \ - } while (0) - -#define LARGER(N) \ - do { \ - if (!C2(HAVE_INT,N)) break; \ - r = (uintptr_t)mptr & (N - 1); \ - a = (uintptr_t)mptr & -N; \ - if (r + n <= N) \ - EXACT_ (N, u.C2(i,N), PTR(N,a), goto Lfinish); \ - } while (0) - - -void -libat_load (size_t n, void *mptr, void *rptr, int smodel) -{ - union max_size_u u; - uintptr_t r, a; - - switch (n) - { - case 0: return; - case 1: EXACT(1); goto L4; - case 2: EXACT(2); goto L4; - case 4: EXACT(4); goto L8; - case 8: EXACT(8); goto L16; - case 16: EXACT(16); break; - - case 3: L4: LARGER(4); /* FALLTHRU */ - case 5 ... 7: L8: LARGER(8); /* FALLTHRU */ - case 9 ... 15: L16: LARGER(16); break; - - Lfinish: - memcpy (rptr, u.b + r, n); - return; - } - - pre_seq_barrier (smodel); - libat_lock_n (mptr, n); - - memcpy (rptr, mptr, n); - - libat_unlock_n (mptr, n); - post_seq_barrier (smodel); -} - -EXPORT_ALIAS (load); |