mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 12:30:32 +00:00
544 lines
20 KiB
C#
544 lines
20 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Text;
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namespace Cosmos.Compiler.XSharp {
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public class TokenPatterns {
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protected class Pattern {
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public TokenList Tokens;
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public int Hash;
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public CodeFunc Code;
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public bool OldCodeType;
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}
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public bool EmitUserComments = true;
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public delegate void CodeFunc(TokenList aTokens, ref List<string> rCode);
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protected List<Pattern> mPatterns = new List<Pattern>();
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protected string mGroup;
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protected string mProcedureName = null;
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protected bool mInIntHandler;
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public TokenPatterns() {
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AddPatterns();
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}
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protected string Quoted(string aString) {
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return "\"" + aString + "\"";
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}
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protected int IntValue(Token aToken) {
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if (aToken.Value.StartsWith("0x")) {
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return int.Parse(aToken.Value.Substring(2), NumberStyles.AllowHexSpecifier);
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} else {
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return int.Parse(aToken.Value);
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}
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}
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protected string GroupLabel(int aIdx) {
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return GroupLabel("{" + aIdx + "}");
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}
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protected string GroupLabel(string aLabel) {
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return mGroup + "_" + aLabel;
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}
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protected string ProcLabel(int aIdx) {
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return ProcLabel("{" + aIdx + "}");
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}
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protected string ProcLabel(string aLabel) {
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return mGroup + "_" + mProcedureName + "_" + aLabel;
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}
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protected string GetLabel(Token aToken) {
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if (aToken.Type != TokenType.AlphaNum) {
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throw new Exception("Label must be AlphaNum.");
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}
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string xValue = aToken.Value;
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if (mProcedureName == null) {
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if (xValue.StartsWith(".")) {
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return xValue.Substring(1);
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}
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return GroupLabel(xValue);
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} else {
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if (xValue.StartsWith("..")) {
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return xValue.Substring(2);
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} else if (xValue.StartsWith(".")) {
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return GroupLabel(xValue.Substring(1));
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}
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return ProcLabel(xValue);
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}
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}
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protected string GetDestRegister(TokenList aTokens, int aIdx) {
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return GetRegister("Destination", aTokens, aIdx);
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}
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protected string GetSrcRegister(TokenList aTokens, int aIdx) {
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return GetRegister("Source", aTokens, aIdx);
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}
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protected string GetRegister(string aPrefix, TokenList aTokens, int aIdx) {
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var xToken = aTokens[aIdx].Type;
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Token xNext = null;
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if (aIdx + 1 < aTokens.Count) {
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xNext = aTokens[aIdx + 1];
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}
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string xResult = aPrefix + "Reg = RegistersEnum." + aTokens[aIdx].Value;
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if (xNext != null) {
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if (xNext.Value == "[") {
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string xDisplacement;
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if (aTokens[aIdx + 2].Value == "-") {
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xDisplacement = "-" + aTokens[aIdx + 2].Value;
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} else {
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xDisplacement = aTokens[aIdx + 2].Value;
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}
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xResult = xResult + ", " + aPrefix + "IsIndirect = true, " + aPrefix + "Displacement = " + xDisplacement;
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}
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}
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return xResult;
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}
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protected string GetCondition(Token aToken) {
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if (aToken.Value == "<") {
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return "ConditionalTestEnum.LessThan";
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} else if (aToken.Value == ">") {
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return "ConditionalTestEnum.GreaterThan";
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} else if (aToken.Value == "=" || aToken.Value == "0") {
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return "ConditionalTestEnum.Zero";
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} else if (aToken.Value == "!=") {
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return "ConditionalTestEnum.NotZero";
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} else if (aToken.Value == "<=") {
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return "ConditionalTestEnum.BelowOrEqual";
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} else if (aToken.Value == ">=") {
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return "ConditionalTestEnum.AboveOrEqual";
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} else {
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throw new Exception("Unrecognized symbol in conditional: " + aToken.Value);
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}
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}
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protected void AddPatterns() {
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AddPattern("! Move EAX, 0", "{0}");
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AddPattern("# Comment", delegate(TokenList aTokens, ref List<string> rCode) {
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if (EmitUserComments) {
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string xValue = aTokens[0].Value;
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xValue = xValue.Replace("\"", "\\\"");
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rCode.Add("; " + xValue);
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}
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});
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// Labels
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// Local and proc level are used most, so designed to make their syntax shortest.
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// Think of the dots like a directory, . is current group, .. is above that.
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// ..Name: - Global level. Emitted exactly as is.
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// .Name: - Group level. Group_Name
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// Name: - Procedure level. Group_ProcName_Name
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AddPattern("_ABC:", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add(GetLabel(aTokens[0]) + ":");
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});
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AddPattern("Call _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Call " + GetLabel(aTokens[1]));
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});
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AddPattern("Goto _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Jp " + GetLabel(aTokens[1]));
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});
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AddPattern(true, "var _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("mAssembler.DataMembers.Add(new DataMember(" + Quoted(GetLabel(aTokens[1])) + ", 0));");
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});
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AddPattern(true, "var _ABC = 123", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("mAssembler.DataMembers.Add(new DataMember(" + Quoted(GetLabel(aTokens[1])) + ", " + aTokens[3].Value + "));");
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});
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AddPattern(true, "var _ABC = 'Text'", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("mAssembler.DataMembers.Add(new DataMember(" + Quoted(GetLabel(aTokens[1])) + ", \"" + aTokens[3].Value + "\"));");
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});
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AddPattern(true, "var _ABC _ABC[123]", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("mAssembler.DataMembers.Add(new DataMember(" + Quoted(GetLabel(aTokens[1])) + ", new " + aTokens[2].Value + "[" + aTokens[4].Value + "]));");
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});
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AddPattern(true, new string[] {
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"if 0 goto _ABC",
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"if < goto _ABC",
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"if > goto _ABC",
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"if = goto _ABC",
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"if != goto _ABC",
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"if <= goto _ABC",
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"if >= goto _ABC"
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},
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delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel = GetLabel(aTokens[3]);
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var xCondition = GetCondition(aTokens[1]);
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rCode.Add("new ConditionalJump {{ Condition = " + xCondition + ", DestinationLabel = " + Quoted(xLabel) + " }};");
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}
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);
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AddPattern(true, new string[] {
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"if 0 Exit",
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"if < Exit",
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"if > Exit",
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"if = Exit",
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"if != Exit",
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"if <= Exit",
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"if >= Exit"
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},
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delegate(TokenList aTokens, ref List<string> rCode) {
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var xCondition = GetCondition(aTokens[1]);
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rCode.Add("new ConditionalJump {{ Condition = " + xCondition + ", DestinationLabel = " + Quoted(ProcLabel("Exit")) + " }};");
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}
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);
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// Must test separate since !0 is two tokens
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AddPattern(true, "if !0 goto _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel = GetLabel(aTokens[4]);
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rCode.Add("new ConditionalJump {{ Condition = ConditionalTestEnum.NotZero, DestinationLabel = " + Quoted(xLabel) + " }};");
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});
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AddPattern(true, "if !0 Exit", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("new ConditionalJump {{ Condition = ConditionalTestEnum.NotZero, DestinationLabel = " + Quoted(ProcLabel("Exit")) + " }};");
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});
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AddPattern(true, new string[] {
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//0 1 2 3 4 5
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"if _REG < 123 goto _ABC",
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"if _REG > 123 goto _ABC",
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"if _REG = 123 goto _ABC",
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"if _REG != 123 goto _ABC",
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"if _REG <= 123 goto _ABC",
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"if _REG >= 123 goto _ABC"
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},
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delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("new Compare {{ DestinationReg = RegistersEnum.{1}, SourceValue = {3} }};");
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var xCondition = GetCondition(aTokens[2]);
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string xLabel = GetLabel(aTokens[5]);
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rCode.Add("new ConditionalJump {{ Condition = " + xCondition + ", DestinationLabel = " + Quoted(xLabel) + " }};");
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}
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);
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AddPattern(true, new string[] {
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//0 1 2 3 4
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"if _REG < 123 Exit",
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"if _REG > 123 Exit",
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"if _REG = 123 Exit",
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"if _REG != 123 Exit",
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"if _REG <= 123 Exit",
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"if _REG >= 123 Exit"
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},
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delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("new Compare {{ DestinationReg = RegistersEnum.{1}, SourceValue = {3} }};");
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var xCondition = GetCondition(aTokens[2]);
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rCode.Add("new ConditionalJump {{ Condition = " + xCondition + ", DestinationLabel = " + Quoted(ProcLabel("Exit")) + " }};");
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}
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);
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AddPattern(true, "_REG ?= 123",
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"new Compare {{ DestinationReg = RegistersEnum.{0}, SourceValue = {2} }};"
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);
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AddPattern(true, "_REG ?= _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel = GetLabel(aTokens[2]);
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rCode.Add("new Compare {{ DestinationReg = RegistersEnum.{0}, SourceIsIndirect = true, SourceRef = Cosmos.Assembler.ElementReference.New(" + Quoted(xLabel) + ") }};");
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});
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AddPattern("_REG ?& 123", "Test {0}, {2}");
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// ~ "infinite" shift because it loops
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AddPattern("_REG ~> 123", "ROR {0}, {2}");
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AddPattern("_REG <~ 123", "ROL {0}, {2}");
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AddPattern("_REG >> 123", "SHR {0}, {2}");
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AddPattern("_REG << 123", "SHL {0}, {2}");
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AddPattern("_REG = 123", "Mov dword {0}, {2}");
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AddPattern("_REG[1] = 123", "Mov dword [{0} + {2}], {5}");
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AddPattern("_REG[-1] = 123", "Mov dword [{0} - {2}], {5}");
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//
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AddPattern(true, new string[] {
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"_REG = #_ABC",
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"_REG32[1] = #_ABC",
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"_REG32[-1] = #_ABC",
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},
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delegate(TokenList aTokens, ref List<string> rCode) {
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int xEqIdx = aTokens.IndexOf("=");
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string xDestReg = GetDestRegister(aTokens, 0);
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string xLabel = GroupLabel("Const_" + aTokens[xEqIdx + 2].Value);
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rCode.Add("new Mov {{"
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+ xDestReg
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+ " , SourceRef = Cosmos.Assembler.ElementReference.New(" + Quoted(xLabel) + ")"
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+ " }};");
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}
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);
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AddPattern(true, new string[] {
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"_REG = _REG",
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"_REG = _REG32[1]",
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"_REG = _REG[-1]",
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"_REG32[1] = _REG",
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"_REG32[-1] = _REG"
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},
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delegate(TokenList aTokens, ref List<string> rCode) {
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int xEqIdx = aTokens.IndexOf("=");
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string xDestReg = GetDestRegister(aTokens, 0);
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string xSrcReg = GetSrcRegister(aTokens, xEqIdx + 1);
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rCode.Add("new Mov{{ " + xDestReg + ", " + xSrcReg + " }};");
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}
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);
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AddPattern(true, "_REG = _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel = GetLabel(aTokens[2]);
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rCode.Add("new Mov {{"
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+ " DestinationReg = RegistersEnum.{0}"
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+ " , SourceRef = Cosmos.Assembler.ElementReference.New(" + Quoted(xLabel) + "), SourceIsIndirect = true"
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+ " }};");
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});
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// why not [var] like registers? Because its less frequent to access th ptr
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// and it is like a reg.. without [] to get the value...
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AddPattern(true, "_REG = @_ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel = GetLabel(aTokens[3]);
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rCode.Add("new Mov {{"
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+ " DestinationReg = RegistersEnum.{0}"
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+ " , SourceRef = Cosmos.Assembler.ElementReference.New(" + Quoted(xLabel) + ")"
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+ " }};");
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});
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AddPattern(new string[] {
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"Port[DX] = AL",
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"Port[DX] = AX",
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"Port[DX] = EAX"
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},
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"Out DX, {5}"
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);
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AddPattern(new string[] {
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"AL = Port[DX]",
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"AX = Port[DX]",
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"EAX = Port[DX]"
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},
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"In {0}, DX"
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);
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AddPattern("+123", "Push dword {1}");
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AddPattern(true, "+123:12",
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"new Push {{"
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+ " DestinationValue = {1}, Size = {3} "
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+ "}};"
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);
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AddPattern(true, "+_REG",
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"new Push {{"
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+ " DestinationReg = RegistersEnum.{1}"
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+ "}};"
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);
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AddPattern(true, "-_REG",
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"new Pop {{"
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+ " DestinationReg = RegistersEnum.{1}"
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+ "}};"
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);
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AddPattern(true, "_ABC = _REG", delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel = GetLabel(aTokens[0]);
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rCode.Add("new Mov {{"
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+ " DestinationRef = Cosmos.Assembler.ElementReference.New(" + Quoted(xLabel) + "), DestinationIsIndirect = true"
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+ " , SourceReg = RegistersEnum.{2}"
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+ " }};");
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});
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AddPattern(true, "_ABC = 123", delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel = GetLabel(aTokens[0]);
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rCode.Add("new Mov {{"
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+ " DestinationRef = Cosmos.Assembler.ElementReference.New(" + Quoted(xLabel) + "), DestinationIsIndirect = true"
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+ " , SourceValue = {2}"
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+ " }};");
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});
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// TODO: Allow asm to optimize these to Inc/Dec
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AddPattern(true, "_REG + 1", delegate(TokenList aTokens, ref List<string> rCode) {
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if (IntValue(aTokens[2]) == 1) {
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rCode.Add("new INC {{ DestinationReg = RegistersEnum.{0} }};");
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} else {
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rCode.Add("new Add {{ DestinationReg = RegistersEnum.{0}, SourceValue = {2} }};");
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}
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});
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AddPattern("_REG++", "Inc {0}");
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AddPattern(true, "_REG - 1", delegate(TokenList aTokens, ref List<string> rCode) {
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if (IntValue(aTokens[2]) == 1) {
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rCode.Add("new Dec {{ DestinationReg = RegistersEnum.{0} }};");
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} else {
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rCode.Add("new Sub {{ DestinationReg = RegistersEnum.{0}, SourceValue = {2} }};");
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}
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});
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AddPattern("_REG--", "Dec {0}");
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AddPattern(true, "}", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("new Label(\"" + mGroup + "_" + mProcedureName + "_Exit\");");
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if (mInIntHandler) {
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rCode.Add("new IRET();");
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} else {
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rCode.Add("new Return();");
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}
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mProcedureName = null;
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});
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AddPattern(true, "Group _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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mGroup = aTokens[1].Value;
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});
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AddPattern(true, "Exit", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("new Jump {{ DestinationLabel = " + Quoted(ProcLabel("Exit")) + " }};");
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});
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AddPattern(true, "InterruptHandler _ABC {", delegate(TokenList aTokens, ref List<string> rCode) {
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mInIntHandler = true;
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mProcedureName = aTokens[1].Value;
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rCode.Add("new Label(\"" + mGroup + "_{1}\");");
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});
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AddPattern(true, "Jump _ABC",
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delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("new Jump {{ DestinationLabel = \"" + mGroup + "_{1}\" }};");
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}
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);
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AddPattern("Return", "Ret");
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AddPattern("ReturnInterrupt", "IRet");
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AddPattern("PopAll", "Popad");
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AddPattern("PushAll", "Pushad");
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AddPattern(true, "Procedure _ABC {", delegate(TokenList aTokens, ref List<string> rCode) {
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mInIntHandler = false;
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mProcedureName = aTokens[1].Value;
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rCode.Add("new Label(\"" + mGroup + "_{1}\");");
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});
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AddPattern(true, "Checkpoint 'Text'", delegate(TokenList aTokens, ref List<string> rCode) {
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// This method emits a lot of ASM, but thats what we want becuase
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// at this point we need ASM as simple as possible and completely transparent.
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// No stack changes, no register mods, no calls, no jumps, etc.
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// TODO: Add an option on the debug project properties to turn this off.
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// Also see WriteDebugVideo in CosmosAssembler.cs
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var xPreBootLogging = true;
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if (xPreBootLogging) {
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UInt32 xVideo = 0xB8000;
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for (UInt32 i = xVideo; i < xVideo + 80 * 2; i = i + 2) {
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rCode.Add("new LiteralAssemblerCode(" + Quoted("mov byte [0x" + i.ToString("X") + "], 0") + ");");
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rCode.Add("new LiteralAssemblerCode(" + Quoted("mov byte [0x" + (i + 1).ToString("X") + "], 0x02") + ");");
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}
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foreach (var xChar in aTokens[1].Value) {
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rCode.Add("new LiteralAssemblerCode(" + Quoted("mov byte [0x" + xVideo.ToString("X") + "], " + (byte)xChar) + ");");
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xVideo = xVideo + 2;
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}
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}
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});
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}
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protected Pattern FindMatch(TokenList aTokens) {
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int xHash = aTokens.GetPatternHashCode();
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// Get a list of matching hashes, but then we have to
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// search for exact pattern match because it is possible
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// to have duplicate hashes. Hashes just provide us a quick way
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// to reduce the search.
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foreach (var xPattern in mPatterns.Where(q => q.Hash == xHash)) {
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if (xPattern.Tokens.PatternMatches(aTokens)) {
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return xPattern;
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}
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}
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return null;
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}
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public List<string> GetPatternCode(string aLine) {
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var xParser = new Parser(aLine, false, false);
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return GetPatternCode(xParser.Tokens);
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|
}
|
|
public List<string> GetPatternCode(TokenList aTokens) {
|
|
var xResult = new List<string>();
|
|
var xPattern = FindMatch(aTokens);
|
|
if (xPattern == null) {
|
|
return null;
|
|
}
|
|
|
|
xPattern.Code(aTokens, ref xResult);
|
|
// Apply {0} etc into string
|
|
for (int i = 0; i < xResult.Count; i++) {
|
|
xResult[i] = string.Format(xResult[i], aTokens.Select(c => c.Value).ToArray());
|
|
}
|
|
if (xPattern.OldCodeType == false) {
|
|
for (int i = 0; i < xResult.Count; i++) {
|
|
xResult[i] = "new LiteralAssemblerCode(\"" + xResult[i] + "\");";
|
|
}
|
|
}
|
|
|
|
return xResult;
|
|
}
|
|
|
|
public List<string> GetNonPatternCode(TokenList aTokens) {
|
|
List<string> xCode = new List<string>();
|
|
var xResult = new List<string>();
|
|
// () could be handled by pattern, but best to keep in one place for future
|
|
if (aTokens.Count == 2 && aTokens[0].Type == TokenType.AlphaNum && aTokens[1].Value == "()") {
|
|
xCode.Add("Call ." + aTokens[0].Value);
|
|
}
|
|
|
|
foreach (var x in xCode) {
|
|
var xLines = GetPatternCode(x);
|
|
if (xLines == null) {
|
|
return null;
|
|
}
|
|
xResult.AddRange(xLines);
|
|
}
|
|
|
|
if (xResult.Count == 0) {
|
|
return null;
|
|
}
|
|
return xResult;
|
|
}
|
|
|
|
public List<string> GetCode(string aLine) {
|
|
var xParser = new Parser(aLine, false, false);
|
|
var xTokens = xParser.Tokens;
|
|
var xResult = GetPatternCode(xTokens);
|
|
if (xResult != null) {
|
|
return xResult;
|
|
}
|
|
|
|
return GetNonPatternCode(xTokens);
|
|
}
|
|
|
|
protected void AddPattern(string[] aPatterns, CodeFunc aCode) {
|
|
AddPattern(false, aPatterns, aCode);
|
|
}
|
|
protected void AddPattern(bool aOldCodeType, string[] aPatterns, CodeFunc aCode) {
|
|
foreach (var xPattern in aPatterns) {
|
|
AddPattern(aOldCodeType, xPattern, aCode);
|
|
}
|
|
}
|
|
protected void AddPattern(string aPattern, CodeFunc aCode) {
|
|
AddPattern(false, aPattern, aCode);
|
|
}
|
|
protected void AddPattern(bool aOldCodeType, string aPattern, CodeFunc aCode) {
|
|
var xParser = new Parser(aPattern, false, true);
|
|
|
|
var xPattern = new Pattern() {
|
|
Tokens = xParser.Tokens,
|
|
Hash = xParser.Tokens.GetHashCode(),
|
|
Code = aCode,
|
|
OldCodeType = aOldCodeType
|
|
};
|
|
|
|
mPatterns.Add(xPattern);
|
|
}
|
|
|
|
protected void AddPattern(string[] aPatterns, string aCode) {
|
|
AddPattern(false, aPatterns, aCode);
|
|
}
|
|
protected void AddPattern(bool aOldCodeType, string[] aPatterns, string aCode) {
|
|
AddPattern(aOldCodeType, aPatterns, delegate(TokenList aTokens, ref List<string> rCode) {
|
|
rCode.Add(aCode);
|
|
});
|
|
}
|
|
protected void AddPattern(string aPattern, string aCode) {
|
|
AddPattern(false, aPattern, aCode);
|
|
}
|
|
protected void AddPattern(bool aOldCodeType, string aPattern, string aCode) {
|
|
AddPattern(aOldCodeType, aPattern, delegate(TokenList aTokens, ref List<string> rCode) {
|
|
rCode.Add(aCode);
|
|
});
|
|
}
|
|
|
|
}
|
|
}
|