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comparison graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/cisc/x86/X86InstructionDescriptionVisitor.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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3732:3e2e8b8abdaf 3733:e233f5660da4
1 /*
2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.sun.max.asm.gen.cisc.x86;
24
25 import com.sun.max.asm.gen.*;
26 import com.sun.max.asm.gen.cisc.*;
27 import com.sun.max.asm.x86.*;
28 import com.sun.max.program.*;
29
30 /**
31 * Almost like the visitor pattern.
32 * Specialized dispatch over InstructionDescription objects.
33 */
34 public interface X86InstructionDescriptionVisitor {
35
36 void visitOperandCode(OperandCode operandCode, X86Operand.Designation designation, ArgumentRange argumentRange, TestArgumentExclusion testArgumentExclusion) throws TemplateNotNeededException;
37
38 void visitAddressingMethodCode(AddressingMethodCode addressingMethodCode, X86Operand.Designation designation) throws TemplateNotNeededException;
39
40 void visitOperandTypeCode(OperandTypeCode operandTypeCode) throws TemplateNotNeededException;
41
42 void visitRegisterOperandCode(RegisterOperandCode registerOperandCode, X86Operand.Designation designation, ImplicitOperand.ExternalPresence externalPresence);
43
44 void visitGeneralRegister(GeneralRegister generalRegister, X86Operand.Designation designation, ImplicitOperand.ExternalPresence externalPresence);
45
46 void visitSegmentRegister(SegmentRegister segmentRegister, X86Operand.Designation designation);
47
48 void visitModRMGroup(ModRMGroup modRMGroup) throws TemplateNotNeededException;
49
50 void visitModCase(X86TemplateContext.ModCase modCase) throws TemplateNotNeededException;
51
52 void visitFloatingPointOperandCode(FloatingPointOperandCode floatingPointOperandCode, X86Operand.Designation designation, TestArgumentExclusion testArgumentExclusion) throws TemplateNotNeededException;
53
54 void visitFPStackRegister(FPStackRegister fpStackRegister, X86Operand.Designation designation);
55
56 void visitString(String string);
57
58 void visitInteger(Integer integer, X86Operand.Designation designation);
59
60 void visitHexByte(HexByte hexByte) throws TemplateNotNeededException;
61
62 void visitInstructionConstraint(InstructionConstraint constraint);
63
64 public static final class Static {
65 private Static() {
66 }
67
68 /**
69 * @return whether the specification constitutes an operand
70 * @throws TemplateNotNeededException
71 */
72 private static boolean visitSpecification(X86InstructionDescriptionVisitor visitor, Object specification,
73 final X86Operand.Designation designation, ArgumentRange argumentRange,
74 final TestArgumentExclusion testArgumentExclusion, ImplicitOperand.ExternalPresence externalPresence) throws TemplateNotNeededException {
75 if (specification instanceof OperandCode) {
76 visitor.visitOperandCode((OperandCode) specification, designation, argumentRange, testArgumentExclusion);
77 return true;
78 } else if (specification instanceof AddressingMethodCode) {
79 visitor.visitAddressingMethodCode((AddressingMethodCode) specification, designation);
80 return true;
81 } else if (specification instanceof OperandTypeCode) {
82 visitor.visitOperandTypeCode((OperandTypeCode) specification);
83 return false;
84 } else if (specification instanceof RegisterOperandCode) {
85 visitor.visitRegisterOperandCode((RegisterOperandCode) specification, designation, externalPresence);
86 return true;
87 } else if (specification instanceof GeneralRegister) {
88 visitor.visitGeneralRegister((GeneralRegister) specification, designation, externalPresence);
89 return true;
90 } else if (specification instanceof SegmentRegister) {
91 visitor.visitSegmentRegister((SegmentRegister) specification, designation);
92 return true;
93 } else if (specification instanceof ModRMGroup) {
94 visitor.visitModRMGroup((ModRMGroup) specification);
95 return false;
96 } else if (specification instanceof X86TemplateContext.ModCase) {
97 visitor.visitModCase((X86TemplateContext.ModCase) specification);
98 return false;
99 } else if (specification instanceof FloatingPointOperandCode) {
100 visitor.visitFloatingPointOperandCode((FloatingPointOperandCode) specification, designation, testArgumentExclusion);
101 return true;
102 } else if (specification instanceof FPStackRegister) {
103 visitor.visitFPStackRegister((FPStackRegister) specification, designation);
104 return true;
105 } else if (specification instanceof String) {
106 visitor.visitString((String) specification);
107 return false;
108 } else if (specification instanceof Integer) {
109 visitor.visitInteger((Integer) specification, designation);
110 return true;
111 } else if (specification instanceof ArgumentRange) {
112 final ArgumentRange newArgumentRange = (ArgumentRange) specification;
113 return visitSpecification(visitor, newArgumentRange.wrappedSpecification(), designation, newArgumentRange, testArgumentExclusion, externalPresence);
114 } else if (specification instanceof HexByte) {
115 visitor.visitHexByte((HexByte) specification);
116 return false;
117 } else if (specification instanceof TestArgumentExclusion) {
118 final TestArgumentExclusion exclusion = (TestArgumentExclusion) specification;
119 return visitSpecification(visitor, exclusion.wrappedSpecification(), designation, argumentRange, exclusion, externalPresence);
120 } else if (specification instanceof ExternalOmission) {
121 final ExternalOmission omission = (ExternalOmission) specification;
122 return visitSpecification(visitor, omission.wrappedSpecification(), designation, argumentRange, testArgumentExclusion, ImplicitOperand.ExternalPresence.OMITTED);
123 } else {
124 throw ProgramError.unexpected("unknown instruction description specification: " + specification);
125 }
126 }
127
128 /**
129 * @return whether this instruction description is to be used to create a template in the given context
130 */
131 public static boolean visitInstructionDescription(X86InstructionDescriptionVisitor visitor, InstructionDescription instructionDescription) {
132 try {
133 int designationIndex = 0;
134 for (Object specification : instructionDescription) {
135 final X86Operand.Designation designation = X86Operand.Designation.VALUES.get(designationIndex);
136 if (visitSpecification(visitor, specification, designation, ArgumentRange.UNSPECIFIED, TestArgumentExclusion.NONE, ImplicitOperand.ExternalPresence.EXPLICIT)) {
137 designationIndex++;
138 }
139 }
140 return true;
141 } catch (TemplateNotNeededException templateNotNeededException) {
142 return false;
143 }
144 }
145 }
146 }