| /* |
| * Copyright (c) 2013, 2015, 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. |
| */ |
| package org.graalvm.compiler.asm.sparc; |
| |
| import static jdk.vm.ci.sparc.SPARC.STACK_BIAS; |
| import static jdk.vm.ci.sparc.SPARC.fp; |
| import static jdk.vm.ci.sparc.SPARC.sp; |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.sparc.SPARC; |
| |
| import org.graalvm.compiler.asm.AbstractAddress; |
| |
| public class SPARCAddress extends AbstractAddress { |
| |
| private final Register base; |
| private final Register index; |
| private final int displacement; |
| |
| /** |
| * Creates an {@link SPARCAddress} with given base register, no scaling and a given |
| * displacement. |
| * |
| * @param base the base register |
| * @param displacement the displacement |
| */ |
| public SPARCAddress(Register base, int displacement) { |
| this.base = base; |
| this.index = Register.None; |
| this.displacement = displacement; |
| } |
| |
| /** |
| * Creates an {@link SPARCAddress} with given base register, no scaling and a given index. |
| * |
| * @param base the base register |
| * @param index the index register |
| */ |
| public SPARCAddress(Register base, Register index) { |
| this.base = base; |
| this.index = index; |
| this.displacement = 0; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder s = new StringBuilder(); |
| s.append("["); |
| String sep = ""; |
| if (!getBase().equals(Register.None)) { |
| s.append(getBase()); |
| sep = " + "; |
| } |
| if (!getIndex().equals(Register.None)) { |
| s.append(sep).append(getIndex()); |
| sep = " + "; |
| } else { |
| if (getDisplacement() < 0) { |
| s.append(" - ").append(-getDisplacement()); |
| } else if (getDisplacement() > 0) { |
| s.append(sep).append(getDisplacement()); |
| } |
| } |
| s.append("]"); |
| return s.toString(); |
| } |
| |
| /** |
| * @return Base register that defines the start of the address computation. If not present, is |
| * denoted by {@link Register#None}. |
| */ |
| public Register getBase() { |
| return base; |
| } |
| |
| /** |
| * @return Index register, the value of which is added to {@link #getBase}. If not present, is |
| * denoted by {@link Register#None}. |
| */ |
| public Register getIndex() { |
| return index; |
| } |
| |
| /** |
| * @return true if this address has an index register |
| */ |
| public boolean hasIndex() { |
| return !getIndex().equals(Register.None); |
| } |
| |
| /** |
| * This method adds the stack-bias to the displacement if the base register is either |
| * {@link SPARC#sp} or {@link SPARC#fp}. |
| * |
| * @return Optional additive displacement. |
| */ |
| public int getDisplacement() { |
| if (hasIndex()) { |
| throw new InternalError("address has index register"); |
| } |
| // TODO Should we also hide the register save area size here? |
| if (getBase().equals(sp) || getBase().equals(fp)) { |
| return displacement + STACK_BIAS; |
| } |
| return displacement; |
| } |
| } |