Mercurial > hg > truffle
view graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/cisc/x86/X86InstructionDescriptionVisitor.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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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.cisc.x86; import com.sun.max.asm.gen.*; import com.sun.max.asm.gen.cisc.*; import com.sun.max.asm.x86.*; import com.sun.max.program.*; /** * Almost like the visitor pattern. * Specialized dispatch over InstructionDescription objects. */ public interface X86InstructionDescriptionVisitor { void visitOperandCode(OperandCode operandCode, X86Operand.Designation designation, ArgumentRange argumentRange, TestArgumentExclusion testArgumentExclusion) throws TemplateNotNeededException; void visitAddressingMethodCode(AddressingMethodCode addressingMethodCode, X86Operand.Designation designation) throws TemplateNotNeededException; void visitOperandTypeCode(OperandTypeCode operandTypeCode) throws TemplateNotNeededException; void visitRegisterOperandCode(RegisterOperandCode registerOperandCode, X86Operand.Designation designation, ImplicitOperand.ExternalPresence externalPresence); void visitGeneralRegister(GeneralRegister generalRegister, X86Operand.Designation designation, ImplicitOperand.ExternalPresence externalPresence); void visitSegmentRegister(SegmentRegister segmentRegister, X86Operand.Designation designation); void visitModRMGroup(ModRMGroup modRMGroup) throws TemplateNotNeededException; void visitModCase(X86TemplateContext.ModCase modCase) throws TemplateNotNeededException; void visitFloatingPointOperandCode(FloatingPointOperandCode floatingPointOperandCode, X86Operand.Designation designation, TestArgumentExclusion testArgumentExclusion) throws TemplateNotNeededException; void visitFPStackRegister(FPStackRegister fpStackRegister, X86Operand.Designation designation); void visitString(String string); void visitInteger(Integer integer, X86Operand.Designation designation); void visitHexByte(HexByte hexByte) throws TemplateNotNeededException; void visitInstructionConstraint(InstructionConstraint constraint); public static final class Static { private Static() { } /** * @return whether the specification constitutes an operand * @throws TemplateNotNeededException */ private static boolean visitSpecification(X86InstructionDescriptionVisitor visitor, Object specification, final X86Operand.Designation designation, ArgumentRange argumentRange, final TestArgumentExclusion testArgumentExclusion, ImplicitOperand.ExternalPresence externalPresence) throws TemplateNotNeededException { if (specification instanceof OperandCode) { visitor.visitOperandCode((OperandCode) specification, designation, argumentRange, testArgumentExclusion); return true; } else if (specification instanceof AddressingMethodCode) { visitor.visitAddressingMethodCode((AddressingMethodCode) specification, designation); return true; } else if (specification instanceof OperandTypeCode) { visitor.visitOperandTypeCode((OperandTypeCode) specification); return false; } else if (specification instanceof RegisterOperandCode) { visitor.visitRegisterOperandCode((RegisterOperandCode) specification, designation, externalPresence); return true; } else if (specification instanceof GeneralRegister) { visitor.visitGeneralRegister((GeneralRegister) specification, designation, externalPresence); return true; } else if (specification instanceof SegmentRegister) { visitor.visitSegmentRegister((SegmentRegister) specification, designation); return true; } else if (specification instanceof ModRMGroup) { visitor.visitModRMGroup((ModRMGroup) specification); return false; } else if (specification instanceof X86TemplateContext.ModCase) { visitor.visitModCase((X86TemplateContext.ModCase) specification); return false; } else if (specification instanceof FloatingPointOperandCode) { visitor.visitFloatingPointOperandCode((FloatingPointOperandCode) specification, designation, testArgumentExclusion); return true; } else if (specification instanceof FPStackRegister) { visitor.visitFPStackRegister((FPStackRegister) specification, designation); return true; } else if (specification instanceof String) { visitor.visitString((String) specification); return false; } else if (specification instanceof Integer) { visitor.visitInteger((Integer) specification, designation); return true; } else if (specification instanceof ArgumentRange) { final ArgumentRange newArgumentRange = (ArgumentRange) specification; return visitSpecification(visitor, newArgumentRange.wrappedSpecification(), designation, newArgumentRange, testArgumentExclusion, externalPresence); } else if (specification instanceof HexByte) { visitor.visitHexByte((HexByte) specification); return false; } else if (specification instanceof TestArgumentExclusion) { final TestArgumentExclusion exclusion = (TestArgumentExclusion) specification; return visitSpecification(visitor, exclusion.wrappedSpecification(), designation, argumentRange, exclusion, externalPresence); } else if (specification instanceof ExternalOmission) { final ExternalOmission omission = (ExternalOmission) specification; return visitSpecification(visitor, omission.wrappedSpecification(), designation, argumentRange, testArgumentExclusion, ImplicitOperand.ExternalPresence.OMITTED); } else { throw ProgramError.unexpected("unknown instruction description specification: " + specification); } } /** * @return whether this instruction description is to be used to create a template in the given context */ public static boolean visitInstructionDescription(X86InstructionDescriptionVisitor visitor, InstructionDescription instructionDescription) { try { int designationIndex = 0; for (Object specification : instructionDescription) { final X86Operand.Designation designation = X86Operand.Designation.VALUES.get(designationIndex); if (visitSpecification(visitor, specification, designation, ArgumentRange.UNSPECIFIED, TestArgumentExclusion.NONE, ImplicitOperand.ExternalPresence.EXPLICIT)) { designationIndex++; } } return true; } catch (TemplateNotNeededException templateNotNeededException) { return false; } } } }