diff --git a/libc/arch-sh/bionic/atomics_sh.c b/libc/arch-sh/bionic/atomics_sh.c
new file mode 100644
index 0000000..16966f7
--- /dev/null
+++ b/libc/arch-sh/bionic/atomics_sh.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <pthread.h>
+#include <linux/futex.h>
+
+#define  SWAP_LOCK_COUNT  32U
+static pthread_mutex_t  _swap_locks[SWAP_LOCK_COUNT];
+
+#define  SWAP_LOCK(addr)   \
+   &_swap_locks[((unsigned)(void *)(addr) >> 3U) % SWAP_LOCK_COUNT]
+
+#if 0
+/*
+ * Only this function is moved to atomic_cmpxchg.S, and
+ * implemented with gUSA framework.
+ */
+int __atomic_cmpxchg(int old, int _new, volatile int *ptr)
+{
+    int result;
+    pthread_mutex_t *lock = SWAP_LOCK(ptr);
+
+    pthread_mutex_lock(lock);
+
+    if (*ptr == old) {
+        *ptr  = _new;
+        result = 0;
+    } else {
+        result = 1;
+    }
+    pthread_mutex_unlock(lock);
+    return result;
+}
+#else
+extern int __atomic_cmpxchg(int old, int _new, volatile int *ptr);
+#endif
+
+int __atomic_swap(int _new, volatile int *ptr)
+{
+    int oldValue;
+    do {
+        oldValue = *ptr;
+    } while (__atomic_cmpxchg(oldValue, _new, ptr));
+    return oldValue;
+}
+
+int __atomic_dec(volatile int *ptr)
+{
+    int oldValue;
+    do {
+        oldValue = *ptr;
+    } while (__atomic_cmpxchg(oldValue, oldValue-1, ptr));
+    return oldValue;
+}
+
+int __atomic_inc(volatile int *ptr)
+{
+    int32_t oldValue;
+    do {
+        oldValue = *ptr;
+    } while (__atomic_cmpxchg(oldValue, oldValue+1, ptr));
+    return oldValue;
+}
+
+extern int futex(volatile void *, int, int, void *, void *, int);
+
+int __futex_wait(volatile void *ftx, int val, const struct timespec *timeout)
+{
+    return futex(ftx, FUTEX_WAIT, val, (void *)timeout, NULL, 0);
+}
+
+int __futex_wake(volatile void *ftx, int count)
+{
+    return futex(ftx, FUTEX_WAKE, count, NULL, NULL, 0);
+}