1 files changed, 81 insertions, 0 deletions
diff --git a/ports/sysdeps/tile/tilepro/bits/atomic.h b/ports/sysdeps/tile/tilepro/bits/atomic.h
new file mode 100644
index 0000000000..3b9509f530
--- /dev/null
+++ b/ports/sysdeps/tile/tilepro/bits/atomic.h
@@ -0,0 +1,81 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _BITS_ATOMIC_H
+#define _BITS_ATOMIC_H	1
+
+#include <asm/unistd.h>
+
+/* 32-bit integer compare-and-exchange. */
+static __inline __attribute__ ((always_inline))
+int __atomic_cmpxchg_32 (volatile int *mem, int newval, int oldval)
+{
+  int result;
+  __asm__ __volatile__ ("swint1"
+                        : "=R00" (result), "=m" (*mem)
+                        : "R10" (__NR_FAST_cmpxchg), "R00" (mem),
+                          "R01" (oldval), "R02" (newval), "m" (*mem)
+                        : "r20", "r21", "r22", "r23", "r24",
+                          "r25", "r26", "r27", "r28", "r29", "memory");
+  return result;
+}
+
+#define atomic_compare_and_exchange_val_acq(mem, n, o)                  \
+  ((__typeof (*(mem)))                                                  \
+   ((sizeof (*(mem)) == 4) ?                                            \
+    __atomic_cmpxchg_32 ((int *) (mem), (int) (n), (int) (o)) :         \
+    __atomic_error_bad_argument_size()))
+
+/* Atomically compute:
+     int old = *ptr;
+     *ptr = (old & mask) + addend;
+     return old;  */
+
+static __inline __attribute__ ((always_inline))
+int __atomic_update_32 (volatile int *mem, int mask, int addend)
+{
+  int result;
+  __asm__ __volatile__ ("swint1"
+                        : "=R00" (result), "=m" (*mem)
+                        : "R10" (__NR_FAST_atomic_update), "R00" (mem),
+                          "R01" (mask), "R02" (addend), "m" (*mem)
+                        : "r20", "r21", "r22", "r23", "r24",
+                          "r25", "r26", "r27", "r28", "r29", "memory");
+  return result;
+}
+
+/* Size-checked verson of __atomic_update_32. */
+#define __atomic_update(mem, mask, addend)                              \
+  ((__typeof (*(mem)))                                                  \
+   ((sizeof (*(mem)) == 4) ?                                            \
+    __atomic_update_32 ((int *) (mem), (int) (mask), (int) (addend)) :  \
+    __atomic_error_bad_argument_size ()))
+
+#define atomic_exchange_acq(mem, newvalue)              \
+  __atomic_update ((mem), 0, (newvalue))
+#define atomic_exchange_and_add(mem, value)             \
+  __atomic_update ((mem), -1, (value))
+#define atomic_and_val(mem, mask)                       \
+  __atomic_update ((mem), (mask), 0)
+#define atomic_or_val(mem, mask)                        \
+  ({ __typeof (mask) __att1_v = (mask);                 \
+    __atomic_update ((mem), ~__att1_v, __att1_v); })
+
+#include <sysdeps/tile/bits/atomic.h>
+
+#endif /* bits/atomic.h */