js/src/jit-test/tests/basic/testShiftRightArithmetic.js

branch
TOR_BUG_3246
changeset 7
129ffea94266
equal deleted inserted replaced
-1:000000000000 0:2ec432e4e4d9
1 /* Test the proper operation of the arithmetic right shift operator. This is
2 * especially important on ARM as an explicit mask is required at the native
3 * instruction level. */
4
5 load(libdir + 'range.js');
6
7 /* Test different combinations of literals/variables. */
8 var s = 4;
9 var t = 100;
10 assertEq(42 >> s, 2);
11 assertEq(s >> 1, 2);
12 assertEq(23 >> 3, 2);
13 assertEq(t >> s, 6);
14
15
16 function testShiftRightArithmetic()
17 {
18 var r = [];
19 var i = 0;
20 var j = 0;
21
22 var shifts = [0,1,7,8,15,16,23,24,31];
23
24 /* Samples from the simple shift range. */
25 for (i = 0; i < shifts.length; i++)
26 r[j++] = -2147483648 >> shifts[i];
27
28 /* Samples outside the normal shift range. */
29 for (i = 0; i < shifts.length; i++)
30 r[j++] = -2147483648 >> (shifts[i] + 32);
31
32 /* Samples far outside the normal shift range. */
33 for (i = 0; i < shifts.length; i++)
34 r[j++] = -2147483648 >> (shifts[i] + 224);
35 for (i = 0; i < shifts.length; i++)
36 r[j++] = -2147483648 >> (shifts[i] + 256);
37
38 return r.join(",");
39 }
40 assertEq(testShiftRightArithmetic(),
41 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1,"+
42 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1,"+
43 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1,"+
44 "-2147483648,-1073741824,-16777216,-8388608,-65536,-32768,-256,-128,-1");

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