1 files changed, 73 insertions, 0 deletions
diff --git a/libgomp/config/linux/tile/futex.h b/libgomp/config/linux/tile/futex.h
new file mode 100644
index 00000000000..2e733a74018
--- /dev/null
+++ b/libgomp/config/linux/tile/futex.h
@@ -0,0 +1,73 @@
+/* Copyright (C) 2011, 2012
+   Free Software Foundation, Inc.
+   Contributed by Walter Lee (walt@tilera.com)
+
+   This file is part of the GNU OpenMP Library (libgomp).
+
+   Libgomp 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, or (at your option)
+   any later version.
+
+   Libgomp 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/>.  */
+
+/* Provide target-specific access to the futex system call.  */
+
+#include <sys/syscall.h>
+#include <linux/futex.h>
+
+static inline void
+sys_futex0 (int *addr, int op, int val)
+{
+  long _sys_result;
+  long _clobber_r2, _clobber_r3, _clobber_r4, _clobber_r5, _clobber_r10;
+  int err;
+
+  __asm__ __volatile__ (
+    "swint1"
+    : "=R00" (_sys_result), "=R01" (err), "=R02" (_clobber_r2),
+      "=R03" (_clobber_r3), "=R04" (_clobber_r4), "=R05" (_clobber_r5),
+      "=R10" (_clobber_r10)
+    : "R10" (SYS_futex), "R00" (addr), "R01" (op), "R02" (val),
+      "R03" (0)
+    :  "r6",  "r7",
+       "r8",  "r9",        "r11", "r12", "r13", "r14", "r15",
+      "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+      "r24", "r25", "r26", "r27", "r28", "r29", "memory");
+}
+
+static inline void
+futex_wait (int *addr, int val)
+{
+  sys_futex0 (addr, FUTEX_WAIT, val);
+}
+
+static inline void
+futex_wake (int *addr, int count)
+{
+  sys_futex0 (addr, FUTEX_WAKE, count);
+}
+
+static inline void
+cpu_relax (void)
+{
+  __asm volatile ("" : : : "memory");
+}
+
+static inline void
+atomic_write_barrier (void)
+{
+  __sync_synchronize ();
+}