| // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// @assertion int toSigned(int width) |
| /// Returns the least significant width bits of this integer, extending the |
| /// highest retained bit to the sign. This is the same as truncating the value |
| /// to fit in width bits using an signed 2-s complement representation. |
| /// The returned value has the same bit value in all positions higher than width. |
| /// V--sign bit-V |
| /// 16.toSigned(5) == -16 // 00010000 -> 11110000 |
| /// 239.toSigned(5) == 15 // 11101111 -> 00001111 |
| /// ... |
| /// @description Checks that this method returns the least significant width bits |
| /// of this integer, extending the highest retained bit to the sign |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| Expect.equals(-16, 16.toSigned(5)); // 00010000 -> 11110000 |
| Expect.equals(15, 239.toSigned(5)); // 11101111 -> 00001111 |
| } |
