Mercurial > hg > graal-compiler
diff graal/com.oracle.graal.amd64/src/com/oracle/graal/amd64/AMD64Address.java @ 7839:838293a77af7
Make Address class platform specific.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Fri, 22 Feb 2013 12:15:14 +0100 |
parents | graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/Address.java@5e3d1a68664e |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.amd64/src/com/oracle/graal/amd64/AMD64Address.java Fri Feb 22 12:15:14 2013 +0100 @@ -0,0 +1,203 @@ +/* + * Copyright (c) 2010, 2013, 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 com.oracle.graal.amd64; + +import static com.oracle.graal.api.code.ValueUtil.*; + +import com.oracle.graal.api.code.*; +import com.oracle.graal.api.meta.*; + +/** + * Represents an address in target machine memory, specified via some combination of a base + * register, an index register, a displacement and a scale. Note that the base and index registers + * may be a variable that will get a register assigned later by the register allocator. + */ +public final class AMD64Address extends Address { + + private static final long serialVersionUID = -4101548147426595051L; + + private final Value[] baseIndex; + private final Scale scale; + private final int displacement; + + /** + * Creates an {@link AMD64Address} with given base register, no scaling and no displacement. + * + * @param kind the kind of the value being addressed + * @param base the base register + */ + public AMD64Address(Kind kind, Value base) { + this(kind, base, ILLEGAL, Scale.Times1, 0); + } + + /** + * Creates an {@link AMD64Address} with given base register, no scaling and a given + * displacement. + * + * @param kind the kind of the value being addressed + * @param base the base register + * @param displacement the displacement + */ + public AMD64Address(Kind kind, Value base, int displacement) { + this(kind, base, ILLEGAL, Scale.Times1, displacement); + } + + /** + * Creates an {@link AMD64Address} with given base and index registers, scaling and + * displacement. This is the most general constructor. + * + * @param kind the kind of the value being addressed + * @param base the base register + * @param index the index register + * @param scale the scaling factor + * @param displacement the displacement + */ + public AMD64Address(Kind kind, Value base, Value index, Scale scale, int displacement) { + super(kind); + this.baseIndex = new Value[2]; + this.setBase(base); + this.setIndex(index); + this.scale = scale; + this.displacement = displacement; + + assert !isConstant(base) && !isStackSlot(base); + assert !isConstant(index) && !isStackSlot(index); + } + + /** + * A scaling factor used in the SIB addressing mode. + */ + public enum Scale { + Times1(1, 0), Times2(2, 1), Times4(4, 2), Times8(8, 3); + + private Scale(int value, int log2) { + this.value = value; + this.log2 = log2; + } + + /** + * The value (or multiplier) of this scale. + */ + public final int value; + + /** + * The {@linkplain #value value} of this scale log 2. + */ + public final int log2; + + public static Scale fromInt(int scale) { + switch (scale) { + case 1: + return Times1; + case 2: + return Times2; + case 4: + return Times4; + case 8: + return Times8; + default: + throw new IllegalArgumentException(String.valueOf(scale)); + } + } + } + + @Override + public Value[] components() { + return baseIndex; + } + + @Override + public String toString() { + StringBuilder s = new StringBuilder(); + s.append(getKind().getJavaName()).append("["); + String sep = ""; + if (isLegal(getBase())) { + s.append(getBase()); + sep = " + "; + } + if (isLegal(getIndex())) { + s.append(sep).append(getIndex()).append(" * ").append(getScale().value); + sep = " + "; + } + if (getDisplacement() < 0) { + s.append(" - ").append(-getDisplacement()); + } else if (getDisplacement() > 0) { + s.append(sep).append(getDisplacement()); + } + s.append("]"); + return s.toString(); + } + + @Override + public boolean equals(Object obj) { + if (obj instanceof AMD64Address) { + AMD64Address addr = (AMD64Address) obj; + return getKind() == addr.getKind() && getDisplacement() == addr.getDisplacement() && getBase().equals(addr.getBase()) && getScale() == addr.getScale() && + getIndex().equals(addr.getIndex()); + } + return false; + } + + @Override + public int hashCode() { + return getBase().hashCode() ^ getIndex().hashCode() ^ (getDisplacement() << 4) ^ (getScale().value << 8) ^ (getKind().ordinal() << 12); + } + + /** + * @return Base register that defines the start of the address computation. If not present, is + * denoted by {@link Value#ILLEGAL}. + */ + public Value getBase() { + return baseIndex[0]; + } + + public void setBase(Value base) { + this.baseIndex[0] = base; + } + + /** + * @return Index register, the value of which (possibly scaled by {@link #scale}) is added to + * {@link #getBase}. If not present, is denoted by {@link Value#ILLEGAL}. + */ + public Value getIndex() { + return baseIndex[1]; + } + + public void setIndex(Value index) { + this.baseIndex[1] = index; + } + + /** + * @return Scaling factor for indexing, dependent on target operand size. + */ + public Scale getScale() { + return scale; + } + + /** + * @return Optional additive displacement. + */ + public int getDisplacement() { + return displacement; + } +}