new file mode 100644
--- /dev/null
+++ b/src/os/unix/ngx_sunpro_atomic_sparc64.h
@@ -0,0 +1,52 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#if (NGX_PTR_SIZE == 4)
+#define NGX_CASA  ngx_casa
+#else
+#define NGX_CASA  ngx_casxa
+#endif
+
+
+ngx_atomic_uint_t
+ngx_casa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock);
+
+ngx_atomic_uint_t
+ngx_casxa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock);
+
+/* the code in src/os/unix/ngx_sunpro_sparc64.il */
+
+
+static ngx_inline ngx_atomic_uint_t
+ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old,
+    ngx_atomic_uint_t set)
+{
+    NGX_CASA(set, old, lock);
+
+    return (set == old);
+}   
+
+
+static ngx_inline ngx_atomic_int_t
+ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add)
+{
+    ngx_atomic_uint_t  old, res;
+
+    old = *value;
+
+    for ( ;; ) {
+
+        res = old + add;
+
+        NGX_CASA(res, old, value);
+
+        if (res == old) {
+            return res;
+        }
+
+        old = res;
+    }
+}