michael@0: /* Test the proper operation of the logical right shift operator. This is
michael@0:  * especially important on ARM as an explicit mask is required at the native
michael@0:  * instruction level. */
michael@0: 
michael@0: load(libdir + 'range.js');
michael@0: 
michael@0: function testShiftRightLogical()
michael@0: {
michael@0:     var r = [];
michael@0:     var i = 0;
michael@0:     var j = 0;
michael@0: 
michael@0:     var shifts = [0,1,7,8,15,16,23,24,31];
michael@0: 
michael@0:     /* Samples from the simple shift range. */
michael@0:     for (i = 0; i < shifts.length; i++)
michael@0:         r[j++] = -2147483648 >>> shifts[i];
michael@0: 
michael@0:     /* Samples outside the normal shift range. */
michael@0:     for (i = 0; i < shifts.length; i++)
michael@0:         r[j++] = -2147483648 >>> (shifts[i] + 32);
michael@0: 
michael@0:     /* Samples far outside the normal shift range. */
michael@0:     for (i = 0; i < shifts.length; i++)
michael@0:         r[j++] = -2147483648 >>> (shifts[i] + 224);
michael@0:     for (i = 0; i < shifts.length; i++)
michael@0:         r[j++] = -2147483648 >>> (shifts[i] + 256);
michael@0: 
michael@0:     return r.join(",");
michael@0: }
michael@0: /* Note: Arguments to the ">>>" operator are converted to unsigned 32-bit
michael@0:  * integers during evaluation. As a result, -2147483648 >>> 0 evaluates to the
michael@0:  * unsigned interpretation of the same value, which is 2147483648. */
michael@0: assertEq(testShiftRightLogical(),
michael@0: 	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
michael@0: 	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
michael@0: 	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1,"+
michael@0: 	 "2147483648,1073741824,16777216,8388608,65536,32768,256,128,1");