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1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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671 assertEquals(3, shiftByZero(3.1415)); | 671 assertEquals(3, shiftByZero(3.1415)); |
672 | 672 |
673 // Verify that the static type information of x >>> 32 is computed correctly. | 673 // Verify that the static type information of x >>> 32 is computed correctly. |
674 function LogicalShiftRightByMultipleOf32(x) { | 674 function LogicalShiftRightByMultipleOf32(x) { |
675 x = x >>> 32; | 675 x = x >>> 32; |
676 return x + x; | 676 return x + x; |
677 } | 677 } |
678 | 678 |
679 assertEquals(4589934592, LogicalShiftRightByMultipleOf32(-2000000000)); | 679 assertEquals(4589934592, LogicalShiftRightByMultipleOf32(-2000000000)); |
680 assertEquals(4589934592, LogicalShiftRightByMultipleOf32(-2000000000)); | 680 assertEquals(4589934592, LogicalShiftRightByMultipleOf32(-2000000000)); |
| 681 |
| 682 // Verify that the shift amount is reduced modulo 32, not modulo 64. |
| 683 function LeftShiftThreeBy(x) {return 3 << x;} |
| 684 assertEquals(24, LeftShiftThreeBy(3)); |
| 685 assertEquals(24, LeftShiftThreeBy(35)); |
| 686 assertEquals(24, LeftShiftThreeBy(67)); |
| 687 assertEquals(24, LeftShiftThreeBy(-29)); |
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