mirror of
https://github.com/fadden/6502bench.git
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330 lines
15 KiB
C#
330 lines
15 KiB
C#
/*
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* Copyright 2018 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.IO;
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using Asm65;
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namespace SourceGen.AsmGen {
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public class GenCommon {
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/// <summary>
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/// Generates assembly source.
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///
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/// This code is common to all generators.
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/// </summary>
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/// <param name="project"></param>
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/// <param name="formatter"></param>
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/// <param name="sw"></param>
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/// <param name="worker"></param>
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public static void Generate(IGenerator gen, StreamWriter sw, BackgroundWorker worker) {
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DisasmProject proj = gen.Project;
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Formatter formatter = gen.SourceFormatter;
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int offset = 0;
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bool doAddCycles = gen.Settings.GetBool(AppSettings.SRCGEN_SHOW_CYCLE_COUNTS, false);
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GenerateHeader(gen, sw);
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// Used for M/X flag tracking.
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StatusFlags prevFlags = StatusFlags.AllIndeterminate;
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int lastProgress = 0;
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while (offset < proj.FileData.Length) {
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Anattrib attr = proj.GetAnattrib(offset);
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if (attr.IsInstructionStart && offset > 0 &&
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proj.GetAnattrib(offset - 1).IsData) {
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// Transition from data to code. (Don't add blank line for inline data.)
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gen.OutputLine(string.Empty);
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}
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// Long comments come first.
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if (proj.LongComments.TryGetValue(offset, out MultiLineComment longComment)) {
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List<string> formatted = longComment.FormatText(formatter, string.Empty);
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foreach (string str in formatted) {
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gen.OutputLine(str);
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}
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}
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// Check for address change.
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int orgAddr = proj.AddrMap.Get(offset);
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if (orgAddr >= 0) {
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gen.OutputOrgDirective(orgAddr);
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}
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if (attr.IsInstructionStart) {
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// Generate M/X reg width directive, if necessary.
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// NOTE: we can suppress the initial directive if we know what the
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// target assembler's default assumption is. Probably want to handle
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// that in the ORG output handler.
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if (proj.CpuDef.HasEmuFlag) {
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StatusFlags curFlags = attr.StatusFlags;
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curFlags.M = attr.StatusFlags.ShortM ? 1 : 0;
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curFlags.X = attr.StatusFlags.ShortX ? 1 : 0;
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if (curFlags.M != prevFlags.M || curFlags.X != prevFlags.X) {
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// changed, output directive
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gen.OutputRegWidthDirective(offset, prevFlags.M, prevFlags.X,
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curFlags.M, curFlags.X);
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}
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prevFlags = curFlags;
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}
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// Look for embedded instructions.
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int len;
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for (len = 1; len < attr.Length; len++) {
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if (proj.GetAnattrib(offset + len).IsInstructionStart) {
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break;
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}
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}
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// Output instruction.
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GenerateInstruction(gen, sw, offset, len, doAddCycles);
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if (attr.DoesNotContinue) {
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gen.OutputLine(string.Empty);
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}
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offset += len;
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} else {
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gen.OutputDataOp(offset);
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offset += attr.Length;
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}
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// Update progress meter. We don't want to spam it, so just ping it 10x.
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int curProgress = (offset * 10) / proj.FileData.Length;
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if (lastProgress != curProgress) {
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if (worker.CancellationPending) {
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Debug.WriteLine("GenCommon got cancellation request");
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return;
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}
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lastProgress = curProgress;
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worker.ReportProgress(curProgress * 10);
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//System.Threading.Thread.Sleep(500);
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}
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}
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}
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private static void GenerateHeader(IGenerator gen, StreamWriter sw) {
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DisasmProject proj = gen.Project;
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Formatter formatter = gen.SourceFormatter;
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// Check for header comment.
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if (proj.LongComments.TryGetValue(DisplayList.Line.HEADER_COMMENT_OFFSET,
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out MultiLineComment headerComment)) {
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List<string> formatted = headerComment.FormatText(formatter, string.Empty);
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foreach (string str in formatted) {
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gen.OutputLine(str);
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}
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}
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gen.OutputAsmConfig();
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// Format symbols.
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foreach (DefSymbol defSym in proj.ActiveDefSymbolList) {
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// Use an operand length of 1 so things are shown as concisely as possible.
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string valueStr = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
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gen.Localizer.LabelMap, defSym.DataDescriptor, defSym.Value, 1, false);
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gen.OutputEquDirective(defSym.Label, valueStr, defSym.Comment);
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}
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// If there was at least one symbol, output a blank line.
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if (proj.ActiveDefSymbolList.Count != 0) {
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gen.OutputLine(string.Empty);
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}
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}
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private static void GenerateInstruction(IGenerator gen, StreamWriter sw, int offset,
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int instrBytes, bool doAddCycles) {
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DisasmProject proj = gen.Project;
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Formatter formatter = gen.SourceFormatter;
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byte[] data = proj.FileData;
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Anattrib attr = proj.GetAnattrib(offset);
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string labelStr = string.Empty;
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if (attr.Symbol != null) {
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labelStr = gen.Localizer.ConvLabel(attr.Symbol.Label);
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}
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OpDef op = proj.CpuDef.GetOpDef(data[offset]);
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int operand = op.GetOperand(data, offset, attr.StatusFlags);
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int instrLen = op.GetLength(attr.StatusFlags);
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OpDef.WidthDisambiguation wdis = OpDef.WidthDisambiguation.None;
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if (op.IsWidthPotentiallyAmbiguous) {
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wdis = OpDef.GetWidthDisambiguation(instrLen, operand);
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}
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string replMnemonic = gen.ReplaceMnemonic(op);
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string opcodeStr = formatter.FormatOpcode(op, wdis);
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string formattedOperand = null;
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int operandLen = instrLen - 1;
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bool isPcRel = false;
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bool isPcRelBankWrap = false;
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// Tweak branch instructions. We want to show the absolute address rather
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// than the relative offset (which happens with the OperandAddress assignment
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// below), and 1-byte branches should always appear as a 4-byte hex value.
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if (op.AddrMode == OpDef.AddressMode.PCRel) {
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Debug.Assert(attr.OperandAddress >= 0);
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operandLen = 2;
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isPcRel = true;
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} else if (op.AddrMode == OpDef.AddressMode.PCRelLong ||
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op.AddrMode == OpDef.AddressMode.StackPCRelLong) {
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isPcRel = true;
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}
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if (isPcRel) {
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int branchDist = attr.Address - attr.OperandAddress;
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isPcRelBankWrap = branchDist > 32767 || branchDist < -32768;
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}
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// 16-bit operands outside bank 0 need to include the bank when computing
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// symbol adjustment.
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int operandForSymbol = operand;
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if (attr.OperandAddress >= 0) {
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operandForSymbol = attr.OperandAddress;
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}
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// Check Length to watch for bogus descriptors (?)
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if (attr.DataDescriptor != null && attr.Length == attr.DataDescriptor.Length) {
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// Format operand as directed.
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if (op.AddrMode == OpDef.AddressMode.BlockMove) {
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// Special handling for the double-operand block move.
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string opstr1 = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
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gen.Localizer.LabelMap, attr.DataDescriptor, operand >> 8, 1, false);
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string opstr2 = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
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gen.Localizer.LabelMap, attr.DataDescriptor, operand & 0xff, 1, false);
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if (gen.Quirks.BlockMoveArgsReversed) {
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string tmp = opstr1;
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opstr1 = opstr2;
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opstr2 = tmp;
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}
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formattedOperand = opstr1 + "," + opstr2;
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} else {
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formattedOperand = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
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gen.Localizer.LabelMap, attr.DataDescriptor,
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operandForSymbol, operandLen, isPcRel);
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}
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} else {
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// Show operand value in hex.
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if (op.AddrMode == OpDef.AddressMode.BlockMove) {
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int arg1, arg2;
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if (gen.Quirks.BlockMoveArgsReversed) {
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arg1 = operand & 0xff;
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arg2 = operand >> 8;
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} else {
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arg1 = operand >> 8;
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arg2 = operand & 0xff;
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}
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formattedOperand = formatter.FormatHexValue(arg1, 2) + "," +
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formatter.FormatHexValue(arg2, 2);
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} else {
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if (operandLen == 2) {
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// This is necessary for 16-bit operands, like "LDA abs" and "PEA val",
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// when outside bank zero. The bank is included in the operand address,
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// but we don't want to show it here.
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operandForSymbol &= 0xffff;
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}
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formattedOperand = formatter.FormatHexValue(operandForSymbol, operandLen * 2);
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}
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}
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string operandStr = formatter.FormatOperand(op, formattedOperand, wdis);
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string eolComment = proj.Comments[offset];
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if (doAddCycles) {
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bool branchCross = (attr.Address & 0xff00) != (operandForSymbol & 0xff00);
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int cycles = proj.CpuDef.GetCycles(op.Opcode, attr.StatusFlags, attr.BranchTaken,
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branchCross);
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if (cycles > 0) {
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eolComment = cycles.ToString() + " " + eolComment;
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} else {
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eolComment = (-cycles).ToString() + "+ " + eolComment;
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}
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}
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string commentStr = formatter.FormatEolComment(eolComment);
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if (attr.Length != instrBytes) {
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// This instruction has another instruction inside it. Throw out what we
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// computed and just output as bytes.
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gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
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} else if (isPcRelBankWrap && gen.Quirks.NoPcRelBankWrap) {
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// Some assemblers have trouble generating PC-relative operands that wrap
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// around the bank. Output as raw hex.
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gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
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} else if (op.AddrMode == OpDef.AddressMode.BlockMove &&
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gen.Quirks.BlockMoveArgsReversed) {
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// On second thought, just don't even output the wrong thing.
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gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
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} else if (replMnemonic == null) {
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// No mnemonic exists for this opcode.
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gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
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} else if (replMnemonic != string.Empty) {
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// A replacement mnemonic has been provided.
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opcodeStr = formatter.FormatMnemonic(replMnemonic, wdis);
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}
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gen.OutputLine(labelStr, opcodeStr, operandStr, commentStr);
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// Assemblers like Merlin32 try to be helpful and track SEP/REP, but they do the
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// wrong thing if we're in emulation mode. Force flags back to short.
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if (proj.CpuDef.HasEmuFlag && gen.Quirks.TracksSepRepNotEmu && op == OpDef.OpREP_Imm) {
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if ((operand & 0x30) != 0 && attr.StatusFlags.E == 1) {
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gen.OutputRegWidthDirective(offset, 0, 0, 1, 1);
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}
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}
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}
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/// <summary>
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/// Configures some common format config items from the app settings. Uses a
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/// passed-in object, rather than the global settings.
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/// </summary>
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/// <param name="settings">Application settings.</param>
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/// <param name="config">Format config struct.</param>
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public static void ConfigureFormatterFromSettings(AppSettings settings,
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ref Formatter.FormatConfig config) {
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config.mUpperHexDigits =
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settings.GetBool(AppSettings.FMT_UPPER_HEX_DIGITS, false);
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config.mUpperOpcodes =
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settings.GetBool(AppSettings.FMT_UPPER_OP_MNEMONIC, false);
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config.mUpperPseudoOpcodes =
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settings.GetBool(AppSettings.FMT_UPPER_PSEUDO_OP_MNEMONIC, false);
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config.mUpperOperandA =
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settings.GetBool(AppSettings.FMT_UPPER_OPERAND_A, false);
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config.mUpperOperandS =
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settings.GetBool(AppSettings.FMT_UPPER_OPERAND_S, false);
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config.mUpperOperandXY =
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settings.GetBool(AppSettings.FMT_UPPER_OPERAND_XY, false);
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config.mAddSpaceLongComment =
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settings.GetBool(AppSettings.FMT_ADD_SPACE_FULL_COMMENT, true);
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config.mForceAbsOpcodeSuffix =
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settings.GetString(AppSettings.FMT_OPCODE_SUFFIX_ABS, string.Empty);
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config.mForceLongOpcodeSuffix =
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settings.GetString(AppSettings.FMT_OPCODE_SUFFIX_LONG, string.Empty);
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config.mForceAbsOperandPrefix =
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settings.GetString(AppSettings.FMT_OPERAND_PREFIX_ABS, string.Empty);
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config.mForceLongOperandPrefix =
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settings.GetString(AppSettings.FMT_OPERAND_PREFIX_LONG, string.Empty);
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string exprMode = settings.GetString(AppSettings.FMT_EXPRESSION_MODE, string.Empty);
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config.mExpressionMode = Formatter.FormatConfig.ParseExpressionMode(exprMode);
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}
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}
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}
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