Imported gcc-4.4.3

[msp430-gcc.git] / libgomp / config / linux / sparc / futex.h

diff --git a/libgomp/config/linux/sparc/futex.h b/libgomp/config/linux/sparc/futex.h
new file mode 100644 (file)
index 0000000..214b786
--- /dev/null
+++ b/libgomp/config/linux/sparc/futex.h
@@ -0,0 +1,108 @@
+/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
+   Contributed by Jakub Jelinek <jakub@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, int op, int val)
+{
+  register long int g1  __asm__ ("g1");
+  register long int o0  __asm__ ("o0");
+  register long int o1  __asm__ ("o1");
+  register long int o2  __asm__ ("o2");
+  register long int o3  __asm__ ("o3");
+
+  g1 = SYS_futex;
+  o0 = (long) addr;
+  o1 = op;
+  o2 = val;
+  o3 = 0;
+
+#ifdef __arch64__
+# define SYSCALL_STRING "ta\t0x6d; bcs,a,pt %%xcc, 1f; sub %%g0, %%o0, %%o0; 1:"
+#else
+# define SYSCALL_STRING "ta\t0x10; bcs,a 1f; sub %%g0, %%o0, %%o0; 1:"
+#endif
+
+  __asm volatile (SYSCALL_STRING
+                 : "=r" (g1), "=r" (o0)
+                 : "0" (g1), "1" (o0), "r" (o1), "r" (o2), "r" (o3)
+                 : "g2", "g3", "g4", "g5", "g6",
+                   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
+                   "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
+                   "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
+                   "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
+#ifdef __arch64__
+                   "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46",
+                   "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",
+#endif
+                   "cc", "memory");
+  return o0;
+}
+
+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)
+{
+#if defined __arch64__ || defined  __sparc_v9__
+  __asm volatile ("membar #LoadLoad" : : : "memory");
+#else
+  __asm volatile ("" : : : "memory");
+#endif
+}
+
+static inline void
+atomic_write_barrier (void)
+{
+#if defined __arch64__ || defined __sparc_v9__
+  __asm volatile ("membar #StoreStore" : : : "memory");
+#else
+  __sync_synchronize ();
+#endif
+}