11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /*
26 * @test
27 * @bug 8080190
28 * @bug 8154537
29 * @key regression
30 * @summary Test that the rotate distance used in the rotate instruction is properly masked with 0x1f
31 * @run main/othervm -Xbatch -XX:-UseOnStackReplacement IntRotateWithImmediate
32 * @author volker.simonis@gmail.com
33 */
34
35 public class IntRotateWithImmediate {
36
37 // This is currently the same as Integer.rotateRight()
38 static int rotateRight1(int i, int distance) {
39 // On some architectures (i.e. x86_64 and ppc64) the following computation is
40 // matched in the .ad file into a single MachNode which emmits a single rotate
41 // machine instruction. It is important that the shift amount is masked to match
42 // corresponding immediate width in the native instruction. On x86_64 the rotate
43 // left instruction ('rol') encodes an 8-bit immediate while the corresponding
44 // 'rotlwi' instruction on Power only encodes a 5-bit immediate.
45 return ((i >>> distance) | (i << -distance));
46 }
47
48 static int rotateRight2(int i, int distance) {
49 return ((i >>> distance) | (i << (32-distance)));
50 }
51
52 static int compute1(int x) {
53 return rotateRight1(x, 3);
54 }
55
56 static int compute2(int x) {
57 return rotateRight2(x, 3);
58 }
59
60 public static void main(String args[]) {
61 int val = 4096;
62
63 int firstResult = compute1(val);
64
65 for (int i = 0; i < 100000; i++) {
66 int newResult = compute1(val);
67 if (firstResult != newResult) {
68 throw new InternalError(firstResult + " != " + newResult);
69 }
|
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /*
26 * @test
27 * @bug 8080190
28 * @bug 8154537
29 * @key regression
30 * @summary Test that the rotate distance used in the rotate instruction is properly masked with 0x1f
31 *
32 * @run main/othervm -Xbatch -XX:-UseOnStackReplacement compiler.codegen.IntRotateWithImmediate
33 * @author volker.simonis@gmail.com
34 */
35
36 package compiler.codegen;
37
38 public class IntRotateWithImmediate {
39
40 // This is currently the same as Integer.rotateRight()
41 static int rotateRight1(int i, int distance) {
42 // On some architectures (i.e. x86_64 and ppc64) the following computation is
43 // matched in the .ad file into a single MachNode which emmits a single rotate
44 // machine instruction. It is important that the shift amount is masked to match
45 // corresponding immediate width in the native instruction. On x86_64 the rotate
46 // left instruction ('rol') encodes an 8-bit immediate while the corresponding
47 // 'rotlwi' instruction on Power only encodes a 5-bit immediate.
48 return ((i >>> distance) | (i << -distance));
49 }
50
51 static int rotateRight2(int i, int distance) {
52 return ((i >>> distance) | (i << (32 - distance)));
53 }
54
55 static int compute1(int x) {
56 return rotateRight1(x, 3);
57 }
58
59 static int compute2(int x) {
60 return rotateRight2(x, 3);
61 }
62
63 public static void main(String args[]) {
64 int val = 4096;
65
66 int firstResult = compute1(val);
67
68 for (int i = 0; i < 100000; i++) {
69 int newResult = compute1(val);
70 if (firstResult != newResult) {
71 throw new InternalError(firstResult + " != " + newResult);
72 }
|