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-rw-r--r--js/src/jit-test/tests/basic/testShiftRightArithmetic.js44
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
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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");