1 files changed, 110 insertions, 0 deletions
diff --git a/libgomp/config/linux/x86/futex.h b/libgomp/config/linux/x86/futex.h
new file mode 100644
index 0000000..4f9aac2
--- /dev/null
+++ b/libgomp/config/linux/x86/futex.h
@@ -0,0 +1,110 @@
+/* Copyright (C) 2005 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 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.
+
+   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 Lesser General Public License for
+   more details.
+
+   You should have received a copy of the GNU Lesser General Public License 
+   along with libgomp; see the file COPYING.LIB.  If not, write to the
+   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+/* As a special exception, if you link this library with other files, some
+   of which are compiled with GCC, to produce an executable, this library
+   does not by itself cause the resulting executable to be covered by the
+   GNU General Public License.  This exception does not however invalidate
+   any other reasons why the executable file might be covered by the GNU
+   General Public License.  */
+
+/* Provide target-specific access to the futex system call.  */
+
+#define FUTEX_WAIT	0
+#define FUTEX_WAKE	1
+
+#ifdef __LP64__
+# ifndef SYS_futex
+#  define SYS_futex	202
+# endif
+
+static inline void
+futex_wait (int *addr, int val)
+{
+  register long r10 __asm__("%r10") = 0;
+  long res;
+
+  __asm volatile ("syscall"
+		  : "=a" (res)
+		  : "0"(SYS_futex), "D" (addr), "S"(FUTEX_WAIT),
+		    "d"(val), "r"(r10)
+		  : "r11", "rcx", "memory");
+}
+
+static inline void
+futex_wake (int *addr, int count)
+{
+  long res;
+
+  __asm volatile ("syscall"
+		  : "=a" (res)
+		  : "0"(SYS_futex), "D" (addr), "S"(FUTEX_WAKE), "d"(count)
+		  : "r11", "rcx", "memory");
+}
+#else
+# ifndef SYS_futex
+#  define SYS_futex	240
+# endif
+
+# ifdef __PIC__
+
+static inline void
+sys_futex0 (int *addr, int op, int val)
+{
+  long res;
+
+  __asm volatile ("xchgl\t%%ebx, %2\n\t"
+		  "int\t$0x80\n\t"
+		  "xchgl\t%%ebx, %2"
+		  : "=a" (res)
+		  : "0"(SYS_futex), "r" (addr), "c"(op),
+		    "d"(val), "S"(0)
+		  : "memory");
+}
+
+# else
+
+static inline void
+sys_futex0 (int *addr, int op, int val)
+{
+  long res;
+
+  __asm volatile ("int $0x80"
+		  : "=a" (res)
+		  : "0"(SYS_futex), "b" (addr), "c"(op),
+		    "d"(val), "S"(0)
+		  : "memory");
+}
+
+# endif /* __PIC__ */
+
+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);
+}
+
+#endif /* __LP64__ */