1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testShiftRightLogical.js b/js/src/jit-test/tests/basic/testShiftRightLogical.js
new file mode 100644
index 0000000000..72bc56d54e
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testShiftRightLogical.js
@@ -0,0 +1,36 @@
+/* Test the proper operation of the logical right shift operator. This is
+ * especially important on ARM as an explicit mask is required at the native
+ * instruction level. */
+
+function testShiftRightLogical()
+{
+    var r = [];
+    var i = 0;
+    var j = 0;
+
+    var shifts = [0,1,7,8,15,16,23,24,31];
+
+    /* Samples from the simple shift range. */
+    for (i = 0; i < shifts.length; i++)
+        r[j++] = -2147483648 >>> shifts[i];
+
+    /* Samples outside the normal shift range. */
+    for (i = 0; i < shifts.length; i++)
+        r[j++] = -2147483648 >>> (shifts[i] + 32);
+
+    /* Samples far outside the normal shift range. */
+    for (i = 0; i < shifts.length; i++)
+        r[j++] = -2147483648 >>> (shifts[i] + 224);
+    for (i = 0; i < shifts.length; i++)
+        r[j++] = -2147483648 >>> (shifts[i] + 256);
+
+    return r.join(",");
+}
+/* Note: Arguments to the ">>>" operator are converted to unsigned 32-bit
+ * integers during evaluation. As a result, -2147483648 >>> 0 evaluates to the
+ * unsigned interpretation of the same value, which is 2147483648. */
+assertEq(testShiftRightLogical(),
+	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
+	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
+	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
+	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1");