hotspot虚拟机源码
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/*
* Copyright (c) 2014, Oracle and/or its affiliates. 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.
*
*/
/**
* Expression that should be replaced by particular instrinsic
* or intruction during compilation.
*/
public abstract class Expr {
public static class MemI {
public MemI(int i) {
this.value = i;
}
public int value;
}
public static class MemL {
public MemL(long l) {
this.value = l;
}
public long value;
}
public boolean isUnaryArgumentSupported() {
return false;
}
public boolean isIntExprSupported() {
return false;
}
public boolean isBinaryArgumentSupported() {
return false;
}
public boolean isLongExprSupported() {
return false;
}
public boolean isMemExprSupported() {
return false;
}
public int intExpr(int reg) {
throw new UnsupportedOperationException();
}
public int intExpr(MemI mem) {
throw new UnsupportedOperationException();
}
public int intExpr(int a, int b) {
throw new UnsupportedOperationException();
}
public int intExpr(int a, MemI b) {
throw new UnsupportedOperationException();
}
public int intExpr(MemI a, int b) {
throw new UnsupportedOperationException();
}
public int intExpr(MemI a, MemI b) {
throw new UnsupportedOperationException();
}
public long longExpr(long reg) {
throw new UnsupportedOperationException();
}
public long longExpr(MemL mem) {
throw new UnsupportedOperationException();
}
public long longExpr(long a, long b) {
throw new UnsupportedOperationException();
}
public long longExpr(long a, MemL b) {
throw new UnsupportedOperationException();
}
public long longExpr(MemL a, long b) {
throw new UnsupportedOperationException();
}
public long longExpr(MemL a, MemL b) {
throw new UnsupportedOperationException();
}
public static class BMIExpr extends Expr {
public boolean isMemExprSupported() {
return true;
}
}
public static class BMIBinaryExpr extends BMIExpr {
public boolean isBinaryArgumentSupported() {
return true;
}
}
public static class BMIUnaryExpr extends BMIExpr {
public boolean isUnaryArgumentSupported() {
return true;
}
}
public static class BMIBinaryIntExpr extends BMIBinaryExpr {
public boolean isIntExprSupported() {
return true;
}
}
public static class BMIBinaryLongExpr extends BMIBinaryExpr {
public boolean isLongExprSupported() {
return true;
}
}
public static class BMIUnaryIntExpr extends BMIUnaryExpr {
public boolean isIntExprSupported() {
return true;
}
}
public static class BMIUnaryLongExpr extends BMIUnaryExpr {
public boolean isLongExprSupported() {
return true;
}
}
public static class BitCountingExpr extends Expr {
public boolean isUnaryArgumentSupported() {
return true;
}
}
public static class BitCountingIntExpr extends BitCountingExpr {
public boolean isIntExprSupported() {
return true;
}
}
public static class BitCountingLongExpr extends BitCountingExpr {
public boolean isLongExprSupported() {
return true;
}
}
}