1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit-test/tests/basic/testShiftRightLogical.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,38 @@
1.4 +/* Test the proper operation of the logical 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 +function testShiftRightLogical()
1.11 +{
1.12 + var r = [];
1.13 + var i = 0;
1.14 + var j = 0;
1.15 +
1.16 + var shifts = [0,1,7,8,15,16,23,24,31];
1.17 +
1.18 + /* Samples from the simple shift range. */
1.19 + for (i = 0; i < shifts.length; i++)
1.20 + r[j++] = -2147483648 >>> shifts[i];
1.21 +
1.22 + /* Samples outside the normal shift range. */
1.23 + for (i = 0; i < shifts.length; i++)
1.24 + r[j++] = -2147483648 >>> (shifts[i] + 32);
1.25 +
1.26 + /* Samples far outside the normal shift range. */
1.27 + for (i = 0; i < shifts.length; i++)
1.28 + r[j++] = -2147483648 >>> (shifts[i] + 224);
1.29 + for (i = 0; i < shifts.length; i++)
1.30 + r[j++] = -2147483648 >>> (shifts[i] + 256);
1.31 +
1.32 + return r.join(",");
1.33 +}
1.34 +/* Note: Arguments to the ">>>" operator are converted to unsigned 32-bit
1.35 + * integers during evaluation. As a result, -2147483648 >>> 0 evaluates to the
1.36 + * unsigned interpretation of the same value, which is 2147483648. */
1.37 +assertEq(testShiftRightLogical(),
1.38 + "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
1.39 + "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
1.40 + "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
1.41 + "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1");
