mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 12:30:32 +00:00
585 lines
20 KiB
C#
585 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 readonly TokenList Tokens;
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public readonly int Hash;
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public readonly CodeFunc Code;
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public bool RawAsm;
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public Pattern(TokenList aTokens, CodeFunc aCode) {
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Tokens = aTokens;
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Hash = aTokens.GetHashCode();
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Code = aCode;
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}
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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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protected TokenList mBlockStarter = null;
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protected List<string> mBlock = null;
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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 ConstLabel(Token aToken) {
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return GroupLabel("Const_" + aToken);
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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(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 GetJump(Token aToken) {
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if (aToken.Value == "<") {
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return "JB"; // unsigned
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} else if (aToken.Value == ">") {
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return "JA"; // unsigned
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} else if (aToken.Value == "=") {
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return "JE";
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} else if (aToken.Value == "0") {
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// Same as JE, but implies intent in .asm better
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return "JZ";
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} else if (aToken.Value == "!=") {
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return "JNE";
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} else if (aToken.Value == "<=") {
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return "JBE"; // unsigned
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} else if (aToken.Value == ">=") {
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return "JAE"; // unsigned
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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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var xSpace = " ".ToCharArray();
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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("Jmp " + GetLabel(aTokens[1]));
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});
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AddPattern("const _ABC = 123", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add(ConstLabel(aTokens[1]) + " equ " + aTokens[3]);
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});
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AddPattern(false, "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(false, "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(false, "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(false, "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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// Must test separate since !0 is two tokens
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AddPattern("if !0 goto _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("JNZ " + GetLabel(aTokens[4]));
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});
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AddPattern("if !0 return", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("JNZ " + ProcLabel("Exit"));
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});
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foreach (var xComparison in "< > = != <= >= 0".Split(xSpace)) {
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foreach (var xTail in "goto _ABC|return".Split("|".ToCharArray())) {
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if (xComparison != "0") {
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AddPattern(new string[] {
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//0 1 2 3 4
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"if _REG " + xComparison + " 123 " + xTail,
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"if _REG " + xComparison + " _REG " + xTail,
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"if _REG " + xComparison + " _ABC " + xTail,
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// 3 4 5
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"if _REG " + xComparison + " #_ABC " + xTail,
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"if _ABC " + xComparison + " #_ABC " + xTail,
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}, delegate(TokenList aTokens, ref List<string> rCode) {
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int xTailIdx = 4;
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string xLeft = aTokens[1].Value;
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if (aTokens[1].Type == TokenType.AlphaNum) {
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// Hardcoded to dword for now
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xLeft = "dword [" + GetLabel(aTokens[1]) + "]";
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}
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string xRight = aTokens[3].Value;
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if (aTokens[3].Type == TokenType.AlphaNum) {
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xRight = "[" + GetLabel(aTokens[3]) + "]";
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} else if (aTokens[3].Value == "#") {
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xRight = ConstLabel(aTokens[4]);
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xTailIdx = 5;
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}
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rCode.Add("Cmp " + xLeft + ", " + xRight);
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string xLabel;
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if (aTokens[xTailIdx].Matches("return")) {
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xLabel = ProcLabel("Exit");
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} else {
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xLabel = GetLabel(aTokens[xTailIdx + 1]);
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}
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rCode.Add(GetJump(aTokens[2]) + " " + xLabel);
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});
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}
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AddPattern("if " + xComparison + " " + xTail, delegate(TokenList aTokens, ref List<string> rCode) {
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string xLabel;
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if (string.Equals(aTokens[2].Value, "exit", StringComparison.InvariantCultureIgnoreCase)) {
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xLabel = ProcLabel("Exit");
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} else {
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xLabel = GetLabel(aTokens[3]);
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}
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rCode.Add(GetJump(aTokens[1]) + " " + xLabel);
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});
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}
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}
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AddPattern("_REG ?= 123", "Cmp {0}, {2}");
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AddPattern("_REG ?= _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Cmp {0}, " + GetLabel(aTokens[2]));
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});
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AddPattern("_REG ?= #_ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Cmp {0}, " + ConstLabel(aTokens[3]));
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});
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AddPattern("_REG ?& 123", "Test {0}, {2}");
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AddPattern("_REG ?& _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Test {0}, " + GetLabel(aTokens[2]));
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});
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AddPattern("_REG ?& #_ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Test {0}, " + ConstLabel(aTokens[3]));
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});
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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 {0}, {2}");
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AddPattern(new string[] {
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"_REG32[1] = 123",
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"_REGIDX[1] = 123"
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},
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"Mov dword [{0} + {2}], {5}"
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);
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AddPattern(new string[] {
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"_REG32[-1] = 123",
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"_REGIDX[-1] = 123"
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},
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"Mov dword [{0} - {2}], {5}"
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);
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AddPattern("_REG = #_ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov {0}, " + ConstLabel(aTokens[3]));
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});
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AddPattern(new string[] {
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"_REG32[1] = 123",
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"_REGIDX[1] = 123"
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}, delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov dword [{0} + {2}], " + ConstLabel(aTokens[5]));
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});
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AddPattern(new string[] {
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"_REG32[-1] = 123",
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"_REGIDX[-1] = 123"
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}, delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov dword [{0} - {2}], " + ConstLabel(aTokens[5]));
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});
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AddPattern("_REG = _REG", "Mov {0}, {2}");
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AddPattern(new string[] {
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"_REG32[1] = _REG",
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"_REGIDX[1] = _REG"},
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//
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"Mov [{0} + {2}], {5}"
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);
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AddPattern(new string[] {
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"_REG32[-1] = _REG",
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"_REGIDX[-1] = _REG"},
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//
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"Mov [{0} - {3}], {6}"
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);
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AddPattern(new string[] {
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"_REG = _REG32[1]",
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"_REG = _REGIDX[1]"},
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//
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"Mov {0}, [{2} + {4}]"
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);
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AddPattern(new string[] {
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"_REG = _REG32[-1]",
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"_REG = _REGIDX[-1]"},
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//
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"Mov {0}, [{2} - {5}]"
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);
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AddPattern("_REG = _ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov {0}, [" + GetLabel(aTokens[2]) + "]");
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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("_REG = @_ABC", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov {0}, " + GetLabel(aTokens[3]));
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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(new string[] {
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"+123 as byte",
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"+123 as word",
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"+123 as dword"
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}, "Push {3} {1}");
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AddPattern("+_REG", "Push {1}");
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AddPattern(new string[] {
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//0 1 2 3
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"+#_ABC",
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"+#_ABC as byte",
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"+#_ABC as word",
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"+#_ABC as dword"
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}, delegate(TokenList aTokens, ref List<string> rCode) {
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string xSize = "dword ";
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if (aTokens.Count > 2) {
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xSize = aTokens[3].Value + " ";
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}
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rCode.Add("Push " + xSize + ConstLabel(aTokens[1]));
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});
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AddPattern("+All", "Pushad");
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AddPattern("-All", "Popad");
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AddPattern("-_REG", "Pop {1}");
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AddPattern("_ABC = _REG",
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delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov [" + GetLabel(aTokens[0]) + "], {2}");
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});
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AddPattern("_ABC = 123", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov dword [" + GetLabel(aTokens[0]) + "], {2}");
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});
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AddPattern(new string[] {
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"_ABC = 123 as byte",
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"_ABC = 123 as word",
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"_ABC = 123 as dword"},
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delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Mov {4} [" + GetLabel(aTokens[0]) + "], {2}");
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});
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// TODO: Allow asm to optimize these to Inc/Dec
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AddPattern(new string[] {
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"_REG + 1",
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"_REG + _REG"
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}, "Add {0}, {2}");
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AddPattern(new string[] {
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"_REG - 1",
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"_REG - _REG"
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}, "Sub {0}, {2}");
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AddPattern("_REG++", "Inc {0}");
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AddPattern("_REG--", "Dec {0}");
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AddPattern("}", delegate(TokenList aTokens, ref List<string> rCode) {
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if (mBlock == null) {
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rCode.Add(mGroup + "_" + mProcedureName + "_Exit:");
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if (mInIntHandler) {
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rCode.Add("IRet");
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} else {
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rCode.Add("Ret");
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}
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mProcedureName = null;
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} else {
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if (mBlockStarter.PatternMatches("repeat 4 times {")) {
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int xCount = int.Parse(mBlockStarter[1].Value);
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for (int i = 1; i <= xCount; i++) {
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rCode.AddRange(mBlock);
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}
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mBlockStarter = null;
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mBlock = null;
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} else {
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throw new Exception("Unknown block starter.");
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}
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}
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});
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AddPattern("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("Exit", delegate(TokenList aTokens, ref List<string> rCode) {
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rCode.Add("Jmp " + ProcLabel("Exit"));
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});
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AddPattern("Repeat 4 times {", delegate(TokenList aTokens, ref List<string> rCode) {
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mBlockStarter = aTokens;
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mBlock = new List<string>();
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});
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AddPattern("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(mGroup + "_{1}:");
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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("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(mGroup + "_{1}:");
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});
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AddPattern("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("mov byte [0x" + i.ToString("X") + "], 0");
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rCode.Add("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("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.
|
|
foreach (var xPattern in mPatterns.Where(q => q.Hash == xHash)) {
|
|
if (xPattern.Tokens.PatternMatches(aTokens)) {
|
|
return xPattern;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
void AsmToCSharp(List<string> aLines) {
|
|
// Don't reformat if we are in a block because then this will occur twice
|
|
if (mBlock != null) {
|
|
return;
|
|
}
|
|
|
|
for (int i = 0; i < aLines.Count; i++) {
|
|
aLines[i] = "new LiteralAssemblerCode(\"" + aLines[i] + "\");";
|
|
}
|
|
}
|
|
|
|
public List<string> GetPatternCode(TokenList aTokens) {
|
|
var xPattern = FindMatch(aTokens);
|
|
if (xPattern == null) {
|
|
return null;
|
|
}
|
|
|
|
var xResult = new List<string>();
|
|
xPattern.Code(aTokens, ref xResult);
|
|
|
|
// Apply {0} etc into string
|
|
// This happens twice for block code, but its ok because the first pass
|
|
// strips out all tags.
|
|
for (int i = 0; i < xResult.Count; i++) {
|
|
xResult[i] = string.Format(xResult[i], aTokens.ToArray());
|
|
}
|
|
|
|
if (xPattern.RawAsm) {
|
|
AsmToCSharp(xResult);
|
|
}
|
|
|
|
return xResult;
|
|
}
|
|
|
|
public List<string> GetNonPatternCode(TokenList aTokens) {
|
|
if (aTokens.Count == 0) {
|
|
return null;
|
|
}
|
|
|
|
var xFirst = aTokens[0];
|
|
var xLast = aTokens[aTokens.Count - 1];
|
|
var xResult = new List<string>();
|
|
|
|
// Find match and emit X#
|
|
if (aTokens.Count == 2
|
|
&& xFirst.Type == TokenType.AlphaNum
|
|
&& xLast.Matches("()")
|
|
) {
|
|
// () could be handled by pattern, but best to keep in one place for future
|
|
xResult.Add("Call " + GroupLabel(aTokens[0].Value));
|
|
|
|
} else {
|
|
// No matches
|
|
return null;
|
|
}
|
|
|
|
AsmToCSharp(xResult);
|
|
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) {
|
|
xResult = GetNonPatternCode(xTokens);
|
|
}
|
|
|
|
if (mBlock != null) {
|
|
mBlock.AddRange(xResult);
|
|
xResult.Clear();
|
|
}
|
|
return xResult;
|
|
}
|
|
|
|
protected void AddPattern(string aPattern, string aCode) {
|
|
AddPattern(true, aPattern, aCode);
|
|
}
|
|
protected void AddPattern(string aPattern, CodeFunc aCode) {
|
|
AddPattern(true, aPattern, aCode);
|
|
}
|
|
protected void AddPattern(string[] aPatterns, string aCode) {
|
|
AddPattern(true, aPatterns, aCode);
|
|
}
|
|
protected void AddPattern(string[] aPatterns, CodeFunc aCode) {
|
|
AddPattern(true, aPatterns, aCode);
|
|
}
|
|
|
|
protected void AddPattern(bool aRawAsm, string aPattern, CodeFunc aCode) {
|
|
var xParser = new Parser(aPattern, false, true);
|
|
var xPattern = new Pattern(xParser.Tokens, aCode);
|
|
xPattern.RawAsm = aRawAsm;
|
|
mPatterns.Add(xPattern);
|
|
}
|
|
protected void AddPattern(bool aRawAsm, string[] aPatterns, CodeFunc aCode) {
|
|
foreach (var xPattern in aPatterns) {
|
|
AddPattern(aRawAsm, xPattern, aCode);
|
|
}
|
|
}
|
|
protected void AddPattern(bool aRawAsm, string aPattern, string aCode) {
|
|
AddPattern(aRawAsm, aPattern, delegate(TokenList aTokens, ref List<string> rCode) {
|
|
rCode.Add(aCode);
|
|
});
|
|
}
|
|
protected void AddPattern(bool aRawAsm, string[] aPatterns, string aCode) {
|
|
foreach (var xPattern in aPatterns) {
|
|
AddPattern(aRawAsm, xPattern, aCode);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|