Mercurial > hg > truffle
view graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/RiscFieldDisassembler.java @ 4150:c78bace5086a
start work on integrating old hooks into mx, work on sanity checks
introduce a DB class to access the bench DB in an easier way (create benchmarks and benchmark values automatically in the DB)
author | Gilles Duboscq <gilles.m.duboscq@gmail.com> |
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date | Tue, 20 Dec 2011 15:34:43 +0100 |
parents | e233f5660da4 |
children |
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/* * Copyright (c) 2007, 2011, 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.sun.max.asm.gen.risc; import com.sun.max.asm.gen.*; import com.sun.max.asm.gen.risc.bitRange.*; import com.sun.max.asm.gen.risc.field.*; import com.sun.max.lang.*; /** * Disassembles an assembled RISC instruction to show the value of each field in the instruction as * well as the bits occupied by the field. */ class RiscFieldDisassembler<Template_Type extends Template> implements RiscInstructionDescriptionVisitor { private final Template_Type template; private final int assembledInstruction; private String string; public RiscFieldDisassembler(Template_Type template, byte[] assembledInstruction) { assert assembledInstruction.length == 4; this.template = template; this.assembledInstruction = assembledInstruction[0] << 24 | ((assembledInstruction[1] & 0xFF) << 16) | ((assembledInstruction[2] & 0xFF) << 8) | (assembledInstruction[3] & 0xFF); } @Override public String toString() { if (string == null) { string = ""; RiscInstructionDescriptionVisitor.Static.visitInstructionDescription(this, template.instructionDescription()); } return string; } public void visitConstant(RiscConstant constant) { visitField(constant.field()); } public void visitConstraint(InstructionConstraint constraint) { } public void visitField(RiscField field) { if (string.length() != 0) { string += ' '; } final int value; final BitRange bitRange = field.bitRange(); final int width = bitRange.width(); if (field instanceof OperandField) { value = ((OperandField) field).extract(assembledInstruction); } else { value = bitRange.extractUnsignedInt(assembledInstruction); } String binary = Integer.toBinaryString(value); if (binary.length() > width) { binary = binary.substring(binary.length() - width); } else if (binary.length() < width) { binary = Strings.times('0', width - binary.length()) + binary; } string += field.name() + "[" + bitRange + "]=" + value + "{" + binary + "}"; } public void visitString(String s) { } }