1 /* 2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.asm.sparc; 26 27 import static jdk.vm.ci.sparc.SPARC.STACK_BIAS; 28 import static jdk.vm.ci.sparc.SPARC.fp; 29 import static jdk.vm.ci.sparc.SPARC.sp; 30 import jdk.vm.ci.code.Register; 31 import jdk.vm.ci.sparc.SPARC; 32 33 import org.graalvm.compiler.asm.AbstractAddress; 34 35 public class SPARCAddress extends AbstractAddress { 36 37 private final Register base; 38 private final Register index; 39 private final int displacement; 40 41 /** 42 * Creates an {@link SPARCAddress} with given base register, no scaling and a given 43 * displacement. 44 * 45 * @param base the base register 46 * @param displacement the displacement 47 */ 48 public SPARCAddress(Register base, int displacement) { 49 this.base = base; 50 this.index = Register.None; 51 this.displacement = displacement; 52 } 53 54 /** 55 * Creates an {@link SPARCAddress} with given base register, no scaling and a given index. 56 * 57 * @param base the base register 58 * @param index the index register 59 */ 60 public SPARCAddress(Register base, Register index) { 61 this.base = base; 62 this.index = index; 63 this.displacement = 0; 64 } 65 66 @Override 67 public String toString() { 68 StringBuilder s = new StringBuilder(); 69 s.append("["); 70 String sep = ""; 71 if (!getBase().equals(Register.None)) { 72 s.append(getBase()); 73 sep = " + "; 74 } 75 if (!getIndex().equals(Register.None)) { 76 s.append(sep).append(getIndex()); 77 sep = " + "; 78 } else { 79 if (getDisplacement() < 0) { 80 s.append(" - ").append(-getDisplacement()); 81 } else if (getDisplacement() > 0) { 82 s.append(sep).append(getDisplacement()); 83 } 84 } 85 s.append("]"); 86 return s.toString(); 87 } 88 89 /** 90 * @return Base register that defines the start of the address computation. If not present, is 91 * denoted by {@link Register#None}. 92 */ 93 public Register getBase() { 94 return base; 95 } 96 97 /** 98 * @return Index register, the value of which is added to {@link #getBase}. If not present, is 99 * denoted by {@link Register#None}. 100 */ 101 public Register getIndex() { 102 return index; 103 } 104 105 /** 106 * @return true if this address has an index register 107 */ 108 public boolean hasIndex() { 109 return !getIndex().equals(Register.None); 110 } 111 112 /** 113 * This method adds the stack-bias to the displacement if the base register is either 114 * {@link SPARC#sp} or {@link SPARC#fp}. 115 * 116 * @return Optional additive displacement. 117 */ 118 public int getDisplacement() { 119 if (hasIndex()) { 120 throw new InternalError("address has index register"); 121 } 122 // TODO Should we also hide the register save area size here? 123 if (getBase().equals(sp) || getBase().equals(fp)) { 124 return displacement + STACK_BIAS; 125 } 126 return displacement; 127 } 128 }