about summary refs log tree commit diff
path: root/sysdeps/tile/tilegx/atomic-machine.h
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/tile/tilegx/atomic-machine.h')
-rw-r--r--sysdeps/tile/tilegx/atomic-machine.h60
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/tile/tilegx/atomic-machine.h b/sysdeps/tile/tilegx/atomic-machine.h
new file mode 100644
index 0000000000..1f7805bb88
--- /dev/null
+++ b/sysdeps/tile/tilegx/atomic-machine.h
@@ -0,0 +1,60 @@
+/* Copyright (C) 2011-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _ATOMIC_MACHINE_H
+#define _ATOMIC_MACHINE_H	1
+
+#include <arch/spr_def.h>
+
+#ifdef _LP64
+# define __HAVE_64B_ATOMICS 1
+#else
+/* tilegx32 does have 64-bit atomics, but assumptions in the semaphore
+   code mean that unaligned 64-bit atomics will be used if this symbol
+   is true, and unaligned atomics are not supported on tile.  */
+# define __HAVE_64B_ATOMICS 0
+#endif
+
+#define USE_ATOMIC_COMPILER_BUILTINS 0
+
+/* Pick appropriate 8- or 4-byte instruction. */
+#define __atomic_update(mem, v, op)                                     \
+  ((__typeof (*(mem))) (__typeof (*(mem) - *(mem)))                     \
+   ((sizeof (*(mem)) == 8) ?                                            \
+    __insn_##op ((void *) (mem), (int64_t) (__typeof((v) - (v))) (v)) : \
+    (sizeof (*(mem)) == 4) ?                                            \
+    __insn_##op##4 ((void *) (mem), (int32_t) (__typeof ((v) - (v))) (v)) : \
+    __atomic_error_bad_argument_size()))
+
+#define atomic_compare_and_exchange_val_acq(mem, n, o)                  \
+  ({ __insn_mtspr (SPR_CMPEXCH_VALUE, (int64_t) (__typeof ((o) - (o))) (o)); \
+     __atomic_update (mem, n, cmpexch); })
+#define atomic_exchange_acq(mem, newvalue) \
+  __atomic_update (mem, newvalue, exch)
+#define atomic_exchange_and_add(mem, value) \
+  __atomic_update (mem, value, fetchadd)
+#define atomic_and_val(mem, mask) \
+  __atomic_update (mem, mask, fetchand)
+#define atomic_or_val(mem, mask) \
+  __atomic_update (mem, mask, fetchor)
+#define atomic_decrement_if_positive(mem) \
+  __atomic_update (mem, -1, fetchaddgez)
+
+#include <sysdeps/tile/atomic-machine.h>
+
+#endif /* atomic-machine.h */