--- /dev/null
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package memory
+
+import "unsafe"
+
+func roundToPowerOf2(v, round int) int {
+ forceCarry := round - 1
+ truncateMask := ^forceCarry
+ return (v + forceCarry) & truncateMask
+}
+
+func roundUpToMultipleOf64(v int) int {
+ return roundToPowerOf2(v, 64)
+}
+
+func isMultipleOfPowerOf2(v int, d int) bool {
+ return (v & (d - 1)) == 0
+}
+
+func addressOf(b []byte) uintptr {
+ return uintptr(unsafe.Pointer(&b[0]))
+}