The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/jit-test/tests/basic/testShiftRightArithmetic.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,44 @@
     1.4 +/* Test the proper operation of the arithmetic right shift operator. This is
     1.5 + * especially important on ARM as an explicit mask is required at the native
     1.6 + * instruction level. */
     1.7 +
     1.8 +load(libdir + 'range.js');
     1.9 +
    1.10 +/* Test different combinations of literals/variables. */
    1.11 +var s = 4;
    1.12 +var t = 100;
    1.13 +assertEq(42 >> s, 2);
    1.14 +assertEq(s >> 1, 2);
    1.15 +assertEq(23 >> 3, 2);
    1.16 +assertEq(t >> s, 6);
    1.17 +
    1.18 +
    1.19 +function testShiftRightArithmetic()
    1.20 +{
    1.21 +    var r = [];
    1.22 +    var i = 0;
    1.23 +    var j = 0;
    1.24 +
    1.25 +    var shifts = [0,1,7,8,15,16,23,24,31];
    1.26 +
    1.27 +    /* Samples from the simple shift range. */
    1.28 +    for (i = 0; i < shifts.length; i++)
    1.29 +        r[j++] = -2147483648 >> shifts[i];
    1.30 +
    1.31 +    /* Samples outside the normal shift range. */
    1.32 +    for (i = 0; i < shifts.length; i++)
    1.33 +        r[j++] = -2147483648 >> (shifts[i] + 32);
    1.34 +
    1.35 +    /* Samples far outside the normal shift range. */
    1.36 +    for (i = 0; i < shifts.length; i++)
    1.37 +        r[j++] = -2147483648 >> (shifts[i] + 224);
    1.38 +    for (i = 0; i < shifts.length; i++)
    1.39 +        r[j++] = -2147483648 >> (shifts[i] + 256);
    1.40 +
    1.41 +    return r.join(",");
    1.42 +}
    1.43 +assertEq(testShiftRightArithmetic(), 
    1.44 +	 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1,"+
    1.45 +	 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1,"+
    1.46 +	 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1,"+
    1.47 +	 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1");