* c-cppbuiltin.c (c_cpp_builtins): Change _OPENMP value to

[pf3gnuchains/gcc-fork.git] / libgomp / config / linux / sparc / futex.h

diff --git a/libgomp/config/linux/sparc/futex.h b/libgomp/config/linux/sparc/futex.h
index 7b1cc83..b9bc387 100644 (file)
--- a/libgomp/config/linux/sparc/futex.h
+++ b/libgomp/config/linux/sparc/futex.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2005, 2008 Free Software Foundation, Inc.
    Contributed by Jakub Jelinek <jakub@redhat.com>.
 
    This file is part of the GNU OpenMP Library (libgomp).
@@ -28,10 +28,8 @@
 /* Provide target-specific access to the futex system call.  */
 
 #include <sys/syscall.h>
-#define FUTEX_WAIT     0
-#define FUTEX_WAKE     1
 
-static inline void
+static inline long
 sys_futex0 (int *addr, int op, int val)
 {
   register long int g1  __asm__ ("g1");
@@ -47,9 +45,9 @@ sys_futex0 (int *addr, int op, int val)
   o3 = 0;
 
 #ifdef __arch64__
-# define SYSCALL_STRING "ta\t0x6d"
+# define SYSCALL_STRING "ta\t0x6d; bcs,a,pt %%xcc, 1f; sub %%g0, %%o0, %%o0; 1:"
 #else
-# define SYSCALL_STRING "ta\t0x10"
+# define SYSCALL_STRING "ta\t0x10; bcs,a 1f; sub %%g0, %%o0, %%o0; 1:"
 #endif
 
   __asm volatile (SYSCALL_STRING
@@ -65,16 +63,49 @@ sys_futex0 (int *addr, int op, int val)
                    "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",
 #endif
                    "cc", "memory");
+  return o0;
 }
 
 static inline void
 futex_wait (int *addr, int val)
 {
-  sys_futex0 (addr, FUTEX_WAIT, 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)
 {
-  sys_futex0 (addr, FUTEX_WAKE, 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
 }