archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-28 15:24:43 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8187443: Forest Consolidation: Move files to unified layout

Browse source 
Reviewed-by: darcy, ihse
This commit is contained in:
Erik Joelsson 2017-09-12 19:03:39 +02:00
parent 270fe13182
commit 3789983e89
56923 changed files with 3 additions and 15727 deletions
Download patch file Download diff file Expand all files Collapse all files

81
hotspot/test/compiler/codegen/IntRotateWithImmediate.java
View file

@ -1,81 +0,0 @@
/*
* Copyright (c) 2015 SAP SE. All rights reserved.
* Copyright (c) 2016, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8080190
* @bug 8154537
* @key regression
* @summary Test that the rotate distance used in the rotate instruction is properly masked with 0x1f
*
* @run main/othervm -Xbatch -XX:-UseOnStackReplacement compiler.codegen.IntRotateWithImmediate
* @author volker.simonis@gmail.com
*/
package compiler.codegen;
public class IntRotateWithImmediate {
// This is currently the same as Integer.rotateRight()
static int rotateRight1(int i, int distance) {
// On some architectures (i.e. x86_64 and ppc64) the following computation is
// matched in the .ad file into a single MachNode which emmits a single rotate
// machine instruction. It is important that the shift amount is masked to match
// corresponding immediate width in the native instruction. On x86_64 the rotate
// left instruction ('rol') encodes an 8-bit immediate while the corresponding
// 'rotlwi' instruction on Power only encodes a 5-bit immediate.
return ((i >>> distance) | (i << -distance));
}
static int rotateRight2(int i, int distance) {
return ((i >>> distance) | (i << (32 - distance)));
}
static int compute1(int x) {
return rotateRight1(x, 3);
}
static int compute2(int x) {
return rotateRight2(x, 3);
}
public static void main(String args[]) {
int val = 4096;
int firstResult = compute1(val);
for (int i = 0; i < 100000; i++) {
int newResult = compute1(val);
if (firstResult != newResult) {
throw new InternalError(firstResult + " != " + newResult);
}
newResult = compute2(val);
if (firstResult != newResult) {
throw new InternalError(firstResult + " != " + newResult);
}
}
System.out.println("OK");
}
}