--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeDataView.java	Fri Jun 09 21:34:51 2017 +0000
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeDataView.java	Wed Jun 14 10:07:07 2017 +0200
@@ -416,7 +416,7 @@
      * @return 32-bit unsigned int value at the byteOffset
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
-    public static long getUint32(final Object self, final Object byteOffset, final Object littleEndian) {
+    public static double getUint32(final Object self, final Object byteOffset, final Object littleEndian) {
         try {
             return 0xFFFFFFFFL & getBuffer(self, littleEndian).getInt(JSType.toInt32(byteOffset));
         } catch (final IllegalArgumentException iae) {
@@ -432,7 +432,7 @@
      * @return 32-bit unsigned int value at the byteOffset
      */
     @SpecializedFunction
-    public static long getUint32(final Object self, final int byteOffset) {
+    public static double getUint32(final Object self, final int byteOffset) {
         try {
             return JSType.toUint32(getBuffer(self, false).getInt(JSType.toInt32(byteOffset)));
         } catch (final IllegalArgumentException iae) {
@@ -449,7 +449,7 @@
      * @return 32-bit unsigned int value at the byteOffset
      */
     @SpecializedFunction
-    public static long getUint32(final Object self, final int byteOffset, final boolean littleEndian) {
+    public static double getUint32(final Object self, final int byteOffset, final boolean littleEndian) {
         try {
             return JSType.toUint32(getBuffer(self, littleEndian).getInt(JSType.toInt32(byteOffset)));
         } catch (final IllegalArgumentException iae) {
@@ -837,9 +837,9 @@
      * @return undefined
      */
     @SpecializedFunction
-    public static Object setUint32(final Object self, final int byteOffset, final long value) {
+    public static Object setUint32(final Object self, final int byteOffset, final double value) {
         try {
-            getBuffer(self, false).putInt(byteOffset, (int)value);
+            getBuffer(self, false).putInt(byteOffset, (int) JSType.toUint32(value));
             return UNDEFINED;
         } catch (final IllegalArgumentException iae) {
             throw rangeError(iae, "dataview.offset");
@@ -856,9 +856,9 @@
      * @return undefined
      */
     @SpecializedFunction
-    public static Object setUint32(final Object self, final int byteOffset, final long value, final boolean littleEndian) {
+    public static Object setUint32(final Object self, final int byteOffset, final double value, final boolean littleEndian) {
         try {
-            getBuffer(self, littleEndian).putInt(byteOffset, (int)value);
+            getBuffer(self, littleEndian).putInt(byteOffset, (int) JSType.toUint32(value));
             return UNDEFINED;
         } catch (final IllegalArgumentException iae) {
             throw rangeError(iae, "dataview.offset");

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/JDK-8181191.js	Wed Jun 14 10:07:07 2017 +0200
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8181191: getUint32 returning Long
+ *
+ * @test
+ * @run
+ */
+
+
+function uint32(x) {
+    var buffer = new ArrayBuffer(16);
+    var dataview = new DataView(buffer);
+    dataview.setUint32(0, x);
+    return dataview.getUint32(0);
+}
+
+Assert.assertTrue(typeof uint32(0x7f) === 'number');
+Assert.assertTrue(typeof uint32(0x80) === 'number');
+Assert.assertTrue(typeof uint32(0xffffffff) === 'number');
+Assert.assertTrue(typeof uint32(0x100000000) === 'number');
+
+Assert.assertTrue(uint32(0x7f) === 0x7f);
+Assert.assertTrue(uint32(0x80) === 0x80);
+Assert.assertTrue(uint32(0xffffffff) === 0xffffffff);
+Assert.assertTrue(uint32(0x100000000) === 0x0);
+
+Assert.assertTrue(uint32(0x7f) === uint32(0x7f));
+Assert.assertTrue(uint32(0x80) === uint32(0x80));
+Assert.assertTrue(uint32(0xffffffff) === uint32(0xffffffff));
+Assert.assertTrue(uint32(0x100000000) === uint32(0x100000000));