1 files changed, 94 insertions, 0 deletions
diff --git a/libgomp/config/linux/ia64/futex.h b/libgomp/config/linux/ia64/futex.h
new file mode 100644
index 000000000..e5e9aac39
--- /dev/null
+++ b/libgomp/config/linux/ia64/futex.h
@@ -0,0 +1,94 @@
+/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.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>
+
+
+
+static inline long
+sys_futex0(int *addr, long op, int val)
+{
+  register long out0 asm ("out0") = (long) addr;
+  register long out1 asm ("out1") = op;
+  register long out2 asm ("out2") = val;
+  register long out3 asm ("out3") = 0;
+  register long r8 asm ("r8");
+  register long r10 asm ("r10");
+  register long r15 asm ("r15") = SYS_futex;
+
+  __asm __volatile ("break 0x100000"
+	: "=r"(r15), "=r"(out0), "=r"(out1), "=r"(out2), "=r"(out3),
+	  "=r"(r8), "=r"(r10)
+	: "r"(r15), "r"(out0), "r"(out1), "r"(out2), "r"(out3)
+	: "memory", "out4", "out5", "out6", "out7",
+	  /* Non-stacked integer registers, minus r8, r10, r15.  */
+	  "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18",
+	  "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27",
+	  "r28", "r29", "r30", "r31",
+	  /* Predicate registers.  */
+	  "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
+	  /* Non-rotating fp registers.  */
+	  "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
+	  /* Branch registers.  */
+	  "b6");
+  return r8 & r10;
+}
+
+static inline void
+futex_wait (int *addr, int val)
+{
+  long err = sys_futex0 (addr, gomp_futex_wait, val);
+  if (__builtin_expect (err == ENOSYS, 0))
+    {
+      gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
+      gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
+      sys_futex0 (addr, gomp_futex_wait, val);
+    }
+}
+
+static inline void
+futex_wake (int *addr, int count)
+{
+  long err = sys_futex0 (addr, gomp_futex_wake, count);
+  if (__builtin_expect (err == ENOSYS, 0))
+    {
+      gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
+      gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
+      sys_futex0 (addr, gomp_futex_wake, count);
+    }
+}
+
+static inline void
+cpu_relax (void)
+{
+  __asm volatile ("hint @pause" : : : "memory");
+}
+
+static inline void
+atomic_write_barrier (void)
+{
+  __sync_synchronize ();
+}