| /* |
| * Copyright (c) 2009, 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 jdk.vm.ci.code; |
| |
| import static jdk.vm.ci.meta.MetaUtil.*; |
| |
| import jdk.vm.ci.meta.*; |
| |
| /** |
| * Represents the target machine for a compiler, including the CPU architecture, the size of |
| * pointers and references, alignment of stacks, caches, etc. |
| */ |
| public class TargetDescription { |
| |
| public final Architecture arch; |
| |
| /** |
| * Specifies if this is a multi-processor system. |
| */ |
| public final boolean isMP; |
| |
| /** |
| * Specifies if this target supports encoding objects inline in the machine code. |
| */ |
| public final boolean inlineObjects; |
| |
| /** |
| * The machine word size on this target. |
| */ |
| public final int wordSize; |
| |
| /** |
| * The kind to be used for representing raw pointers and CPU registers. |
| */ |
| public final JavaKind wordKind; |
| |
| /** |
| * The stack alignment requirement of the platform. For example, from Appendix D of <a |
| * href="http://www.intel.com/Assets/PDF/manual/248966.pdf">Intel 64 and IA-32 Architectures |
| * Optimization Reference Manual</a>: |
| * |
| * <pre> |
| * "It is important to ensure that the stack frame is aligned to a |
| * 16-byte boundary upon function entry to keep local __m128 data, |
| * parameters, and XMM register spill locations aligned throughout |
| * a function invocation." |
| * </pre> |
| */ |
| public final int stackAlignment; |
| |
| /** |
| * Maximum constant displacement at which a memory access can no longer be an implicit null |
| * check. |
| */ |
| public final int implicitNullCheckLimit; |
| |
| public TargetDescription(Architecture arch, boolean isMP, int stackAlignment, int implicitNullCheckLimit, boolean inlineObjects) { |
| this.arch = arch; |
| this.isMP = isMP; |
| this.wordSize = arch.getWordSize(); |
| this.wordKind = JavaKind.fromWordSize(wordSize); |
| this.stackAlignment = stackAlignment; |
| this.implicitNullCheckLimit = implicitNullCheckLimit; |
| this.inlineObjects = inlineObjects; |
| } |
| |
| @Override |
| public final int hashCode() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public final boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof TargetDescription) { |
| TargetDescription that = (TargetDescription) obj; |
| // @formatter:off |
| if (this.implicitNullCheckLimit == that.implicitNullCheckLimit && |
| this.inlineObjects == that.inlineObjects && |
| this.isMP == that.isMP && |
| this.stackAlignment == that.stackAlignment && |
| this.wordKind.equals(that.wordKind) && |
| this.wordSize == that.wordSize && |
| this.arch.equals(that.arch)) { |
| return true; |
| } |
| // @formatter:on |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return identityHashCodeString(this); |
| } |
| |
| public int getSizeInBytes(PlatformKind kind) { |
| return kind.getSizeInBytes(); |
| } |
| |
| public LIRKind getLIRKind(JavaKind javaKind) { |
| PlatformKind platformKind = arch.getPlatformKind(javaKind); |
| if (javaKind.isObject()) { |
| return LIRKind.reference(platformKind); |
| } else { |
| return LIRKind.value(platformKind); |
| } |
| } |
| } |