diff options
Diffstat (limited to '')
-rw-r--r-- | js/src/jit-test/tests/basic/testShiftRightArithmetic.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testShiftRightArithmetic.js b/js/src/jit-test/tests/basic/testShiftRightArithmetic.js new file mode 100644 index 0000000000..6ecdcc4a90 --- /dev/null +++ b/js/src/jit-test/tests/basic/testShiftRightArithmetic.js @@ -0,0 +1,42 @@ +/* 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. */ + +/* 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"); |