1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testShiftRightArithmetic.js b/js/src/jit-test/tests/basic/testShiftRightArithmetic.js
new file mode 100644
index 000000000..7268dc0ba
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testShiftRightArithmetic.js
@@ -0,0 +1,44 @@
+/* Test the proper operation of the arithmetic right shift operator. This is
+ * especially important on ARM as an explicit mask is required at the native
+ * instruction level. */
+
+load(libdir + 'range.js');
+
+/* Test different combinations of literals/variables. */
+var s = 4;
+var t = 100;
+assertEq(42 >> s, 2);
+assertEq(s >> 1, 2);
+assertEq(23 >> 3, 2);
+assertEq(t >> s, 6);
+
+
+function testShiftRightArithmetic()
+{
+    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(",");
+}
+assertEq(testShiftRightArithmetic(), 
+	 "-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");