| /* 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"); |