update

[l4.git] / l4 / pkg / uclibc / lib / contrib / uclibc / libpthread / nptl / sysdeps / sparc / sparc64 / pthread_spin_lock.c

diff --git a/l4/pkg/uclibc/lib/contrib/uclibc/libpthread/nptl/sysdeps/sparc/sparc64/pthread_spin_lock.c b/l4/pkg/uclibc/lib/contrib/uclibc/libpthread/nptl/sysdeps/sparc/sparc64/pthread_spin_lock.c
new file mode 100644 (file)
index 0000000..53a3eab
--- /dev/null
+++ b/l4/pkg/uclibc/lib/contrib/uclibc/libpthread/nptl/sysdeps/sparc/sparc64/pthread_spin_lock.c
@@ -0,0 +1,39 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   The GNU C Library 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.
+
+   The GNU C Library 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 the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include "pthreadP.h"
+
+int
+pthread_spin_lock (pthread_spinlock_t *lock)
+{
+  __asm__ __volatile
+    ("1: ldstub  [%0], %%g5\n"
+     "   brnz,pn %%g5, 2f\n"
+     "    membar #StoreLoad | #StoreStore\n"
+     ".subsection 2\n"
+     "2: ldub    [%0], %%g5\n"
+     "   brnz,pt %%g5, 2b\n"
+     "    membar #LoadLoad\n"
+     "   b,a,pt  %%xcc, 1b\n"
+     ".previous"
+     : /* no outputs */
+     : "r" (lock)
+     : "g5", "memory");
+  return 0;
+}