Mercurial > hg > truffle
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/cisc/x86/X86InstructionDescriptionVisitor.java Sat Dec 17 19:59:18 2011 +0100 @@ -0,0 +1,146 @@ +/* + * 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; + } + } + } +}