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-rw-r--r--js/src/jit-test/tests/basic/testShiftRightLogical.js36
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
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+++ b/js/src/jit-test/tests/basic/testShiftRightLogical.js
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+/* 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");