mirror of
https://github.com/fadden/6502bench.git
synced 2024-06-11 17:29:29 +00:00
372 lines
18 KiB
C#
372 lines
18 KiB
C#
/*
|
|
* Copyright 2019 faddenSoft
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel;
|
|
using System.Diagnostics;
|
|
using System.IO;
|
|
|
|
using Asm65;
|
|
|
|
namespace SourceGen.AsmGen {
|
|
public class GenCommon {
|
|
/// <summary>
|
|
/// Generates assembly source.
|
|
///
|
|
/// This code is common to all generators.
|
|
/// </summary>
|
|
/// <param name="gen">Reference to generator object (presumably the caller).</param>
|
|
/// <param name="sw">Text output sink.</param>
|
|
/// <param name="worker">Background worker object, for progress updates and
|
|
/// cancelation requests.</param>
|
|
public static void Generate(IGenerator gen, StreamWriter sw, BackgroundWorker worker) {
|
|
DisasmProject proj = gen.Project;
|
|
Formatter formatter = gen.SourceFormatter;
|
|
int offset = 0;
|
|
|
|
bool doAddCycles = gen.Settings.GetBool(AppSettings.SRCGEN_SHOW_CYCLE_COUNTS, false);
|
|
|
|
GenerateHeader(gen, sw);
|
|
|
|
// Used for M/X flag tracking.
|
|
StatusFlags prevFlags = StatusFlags.AllIndeterminate;
|
|
|
|
int lastProgress = 0;
|
|
|
|
while (offset < proj.FileData.Length) {
|
|
Anattrib attr = proj.GetAnattrib(offset);
|
|
|
|
if (attr.IsInstructionStart && offset > 0 &&
|
|
proj.GetAnattrib(offset - 1).IsData) {
|
|
// Transition from data to code. (Don't add blank line for inline data.)
|
|
gen.OutputLine(string.Empty);
|
|
}
|
|
|
|
// Long comments come first.
|
|
if (proj.LongComments.TryGetValue(offset, out MultiLineComment longComment)) {
|
|
List<string> formatted = longComment.FormatText(formatter, string.Empty);
|
|
foreach (string str in formatted) {
|
|
gen.OutputLine(str);
|
|
}
|
|
}
|
|
|
|
// Check for address change.
|
|
int orgAddr = proj.AddrMap.Get(offset);
|
|
if (orgAddr >= 0) {
|
|
gen.OutputOrgDirective(offset, orgAddr);
|
|
}
|
|
|
|
if (attr.IsInstructionStart) {
|
|
// Generate M/X reg width directive, if necessary.
|
|
// NOTE: we can suppress the initial directive if we know what the
|
|
// target assembler's default assumption is. Probably want to handle
|
|
// that in the ORG output handler.
|
|
if (proj.CpuDef.HasEmuFlag) {
|
|
StatusFlags curFlags = attr.StatusFlags;
|
|
curFlags.M = attr.StatusFlags.ShortM ? 1 : 0;
|
|
curFlags.X = attr.StatusFlags.ShortX ? 1 : 0;
|
|
if (curFlags.M != prevFlags.M || curFlags.X != prevFlags.X) {
|
|
// changed, output directive
|
|
gen.OutputRegWidthDirective(offset, prevFlags.M, prevFlags.X,
|
|
curFlags.M, curFlags.X);
|
|
}
|
|
|
|
prevFlags = curFlags;
|
|
}
|
|
|
|
// Look for embedded instructions.
|
|
int len;
|
|
for (len = 1; len < attr.Length; len++) {
|
|
if (proj.GetAnattrib(offset + len).IsInstructionStart) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Output instruction.
|
|
GenerateInstruction(gen, sw, offset, len, doAddCycles);
|
|
|
|
if (attr.DoesNotContinue) {
|
|
gen.OutputLine(string.Empty);
|
|
}
|
|
|
|
offset += len;
|
|
} else {
|
|
gen.OutputDataOp(offset);
|
|
offset += attr.Length;
|
|
}
|
|
|
|
// Update progress meter. We don't want to spam it, so just ping it 10x.
|
|
int curProgress = (offset * 10) / proj.FileData.Length;
|
|
if (lastProgress != curProgress) {
|
|
if (worker.CancellationPending) {
|
|
Debug.WriteLine("GenCommon got cancellation request");
|
|
return;
|
|
}
|
|
lastProgress = curProgress;
|
|
worker.ReportProgress(curProgress * 10);
|
|
//System.Threading.Thread.Sleep(500);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void GenerateHeader(IGenerator gen, StreamWriter sw) {
|
|
DisasmProject proj = gen.Project;
|
|
Formatter formatter = gen.SourceFormatter;
|
|
|
|
// Check for header comment.
|
|
if (proj.LongComments.TryGetValue(LineListGen.Line.HEADER_COMMENT_OFFSET,
|
|
out MultiLineComment headerComment)) {
|
|
List<string> formatted = headerComment.FormatText(formatter, string.Empty);
|
|
foreach (string str in formatted) {
|
|
gen.OutputLine(str);
|
|
}
|
|
}
|
|
|
|
gen.OutputAsmConfig();
|
|
|
|
// Format symbols.
|
|
foreach (DefSymbol defSym in proj.ActiveDefSymbolList) {
|
|
// Use an operand length of 1 so things are shown as concisely as possible.
|
|
string valueStr = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
|
|
gen.Localizer.LabelMap, defSym.DataDescriptor, defSym.Value, 1,
|
|
PseudoOp.FormatNumericOpFlags.None);
|
|
gen.OutputEquDirective(defSym.Label, valueStr, defSym.Comment);
|
|
}
|
|
|
|
// If there was at least one symbol, output a blank line.
|
|
if (proj.ActiveDefSymbolList.Count != 0) {
|
|
gen.OutputLine(string.Empty);
|
|
}
|
|
}
|
|
|
|
private static void GenerateInstruction(IGenerator gen, StreamWriter sw, int offset,
|
|
int instrBytes, bool doAddCycles) {
|
|
DisasmProject proj = gen.Project;
|
|
Formatter formatter = gen.SourceFormatter;
|
|
byte[] data = proj.FileData;
|
|
Anattrib attr = proj.GetAnattrib(offset);
|
|
|
|
string labelStr = string.Empty;
|
|
if (attr.Symbol != null) {
|
|
labelStr = gen.Localizer.ConvLabel(attr.Symbol.Label);
|
|
}
|
|
|
|
OpDef op = proj.CpuDef.GetOpDef(data[offset]);
|
|
int operand = op.GetOperand(data, offset, attr.StatusFlags);
|
|
int instrLen = op.GetLength(attr.StatusFlags);
|
|
OpDef.WidthDisambiguation wdis = OpDef.WidthDisambiguation.None;
|
|
if (op.IsWidthPotentiallyAmbiguous) {
|
|
wdis = OpDef.GetWidthDisambiguation(instrLen, operand);
|
|
}
|
|
if (gen.Quirks.SinglePassAssembler && wdis == OpDef.WidthDisambiguation.None &&
|
|
(op.AddrMode == OpDef.AddressMode.DP ||
|
|
op.AddrMode == OpDef.AddressMode.DPIndexX) ||
|
|
op.AddrMode == OpDef.AddressMode.DPIndexY) {
|
|
// Could be a forward reference to a direct-page label.
|
|
if (IsForwardLabelReference(gen, offset)) {
|
|
wdis = OpDef.WidthDisambiguation.ForceDirect;
|
|
}
|
|
}
|
|
|
|
string opcodeStr = formatter.FormatOpcode(op, wdis);
|
|
|
|
string formattedOperand = null;
|
|
int operandLen = instrLen - 1;
|
|
PseudoOp.FormatNumericOpFlags opFlags = PseudoOp.FormatNumericOpFlags.None;
|
|
bool isPcRelBankWrap = false;
|
|
|
|
// Tweak branch instructions. We want to show the absolute address rather
|
|
// than the relative offset (which happens with the OperandAddress assignment
|
|
// below), and 1-byte branches should always appear as a 4-byte hex value.
|
|
if (op.AddrMode == OpDef.AddressMode.PCRel) {
|
|
Debug.Assert(attr.OperandAddress >= 0);
|
|
operandLen = 2;
|
|
opFlags = PseudoOp.FormatNumericOpFlags.IsPcRel;
|
|
} else if (op.AddrMode == OpDef.AddressMode.PCRelLong ||
|
|
op.AddrMode == OpDef.AddressMode.StackPCRelLong) {
|
|
opFlags = PseudoOp.FormatNumericOpFlags.IsPcRel;
|
|
} else if (op.AddrMode == OpDef.AddressMode.Imm ||
|
|
op.AddrMode == OpDef.AddressMode.ImmLongA ||
|
|
op.AddrMode == OpDef.AddressMode.ImmLongXY) {
|
|
opFlags = PseudoOp.FormatNumericOpFlags.HasHashPrefix;
|
|
}
|
|
if (opFlags == PseudoOp.FormatNumericOpFlags.IsPcRel) {
|
|
int branchDist = attr.Address - attr.OperandAddress;
|
|
isPcRelBankWrap = branchDist > 32767 || branchDist < -32768;
|
|
}
|
|
|
|
// 16-bit operands outside bank 0 need to include the bank when computing
|
|
// symbol adjustment.
|
|
int operandForSymbol = operand;
|
|
if (attr.OperandAddress >= 0) {
|
|
operandForSymbol = attr.OperandAddress;
|
|
}
|
|
|
|
// Check Length to watch for bogus descriptors. (ApplyFormatDescriptors() should
|
|
// now be screening bad descriptors out, so we may not need the Length test.)
|
|
if (attr.DataDescriptor != null && attr.Length == attr.DataDescriptor.Length) {
|
|
// Format operand as directed.
|
|
if (op.AddrMode == OpDef.AddressMode.BlockMove) {
|
|
// Special handling for the double-operand block move.
|
|
string opstr1 = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
|
|
gen.Localizer.LabelMap, attr.DataDescriptor, operand >> 8, 1,
|
|
PseudoOp.FormatNumericOpFlags.None);
|
|
string opstr2 = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
|
|
gen.Localizer.LabelMap, attr.DataDescriptor, operand & 0xff, 1,
|
|
PseudoOp.FormatNumericOpFlags.None);
|
|
if (gen.Quirks.BlockMoveArgsReversed) {
|
|
string tmp = opstr1;
|
|
opstr1 = opstr2;
|
|
opstr2 = tmp;
|
|
}
|
|
formattedOperand = opstr1 + "," + opstr2;
|
|
} else {
|
|
formattedOperand = PseudoOp.FormatNumericOperand(formatter, proj.SymbolTable,
|
|
gen.Localizer.LabelMap, attr.DataDescriptor,
|
|
operandForSymbol, operandLen, opFlags);
|
|
}
|
|
} else {
|
|
// Show operand value in hex.
|
|
if (op.AddrMode == OpDef.AddressMode.BlockMove) {
|
|
int arg1, arg2;
|
|
if (gen.Quirks.BlockMoveArgsReversed) {
|
|
arg1 = operand & 0xff;
|
|
arg2 = operand >> 8;
|
|
} else {
|
|
arg1 = operand >> 8;
|
|
arg2 = operand & 0xff;
|
|
}
|
|
formattedOperand = formatter.FormatHexValue(arg1, 2) + "," +
|
|
formatter.FormatHexValue(arg2, 2);
|
|
} else {
|
|
if (operandLen == 2) {
|
|
// This is necessary for 16-bit operands, like "LDA abs" and "PEA val",
|
|
// when outside bank zero. The bank is included in the operand address,
|
|
// but we don't want to show it here.
|
|
operandForSymbol &= 0xffff;
|
|
}
|
|
formattedOperand = formatter.FormatHexValue(operandForSymbol, operandLen * 2);
|
|
}
|
|
}
|
|
string operandStr = formatter.FormatOperand(op, formattedOperand, wdis);
|
|
|
|
string eolComment = proj.Comments[offset];
|
|
if (doAddCycles) {
|
|
bool branchCross = (attr.Address & 0xff00) != (operandForSymbol & 0xff00);
|
|
int cycles = proj.CpuDef.GetCycles(op.Opcode, attr.StatusFlags, attr.BranchTaken,
|
|
branchCross);
|
|
if (cycles > 0) {
|
|
eolComment = cycles.ToString() + " " + eolComment;
|
|
} else {
|
|
eolComment = (-cycles).ToString() + "+ " + eolComment;
|
|
}
|
|
}
|
|
string commentStr = formatter.FormatEolComment(eolComment);
|
|
|
|
string replMnemonic = gen.ModifyOpcode(offset, op);
|
|
if (attr.Length != instrBytes) {
|
|
// This instruction has another instruction inside it. Throw out what we
|
|
// computed and just output as bytes.
|
|
gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
|
|
} else if (isPcRelBankWrap && gen.Quirks.NoPcRelBankWrap) {
|
|
// Some assemblers have trouble generating PC-relative operands that wrap
|
|
// around the bank. Output as raw hex.
|
|
gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
|
|
} else if (op.AddrMode == OpDef.AddressMode.BlockMove &&
|
|
gen.Quirks.BlockMoveArgsReversed) {
|
|
// On second thought, just don't even output the wrong thing.
|
|
gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
|
|
} else if (replMnemonic == null) {
|
|
// No mnemonic exists for this opcode.
|
|
gen.GenerateShortSequence(offset, instrBytes, out opcodeStr, out operandStr);
|
|
} else if (replMnemonic != string.Empty) {
|
|
// A replacement mnemonic has been provided.
|
|
opcodeStr = formatter.FormatMnemonic(replMnemonic, wdis);
|
|
}
|
|
gen.OutputLine(labelStr, opcodeStr, operandStr, commentStr);
|
|
|
|
// Assemblers like Merlin32 try to be helpful and track SEP/REP, but they do the
|
|
// wrong thing if we're in emulation mode. Force flags back to short.
|
|
if (proj.CpuDef.HasEmuFlag && gen.Quirks.TracksSepRepNotEmu && op == OpDef.OpREP_Imm) {
|
|
if ((operand & 0x30) != 0 && attr.StatusFlags.E == 1) {
|
|
gen.OutputRegWidthDirective(offset, 0, 0, 1, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Determines whether the instruction at the specified offset has an operand that is
|
|
/// a forward reference. This only matters for single-pass assemblers.
|
|
/// </summary>
|
|
/// <param name="gen">Source generator reference.</param>
|
|
/// <param name="offset">Offset of instruction opcode.</param>
|
|
/// <returns>True if the instruction's operand is a forward reference to a label.</returns>
|
|
private static bool IsForwardLabelReference(IGenerator gen, int offset) {
|
|
DisasmProject proj = gen.Project;
|
|
Debug.Assert(proj.GetAnattrib(offset).IsInstructionStart);
|
|
|
|
FormatDescriptor dfd = proj.GetAnattrib(offset).DataDescriptor;
|
|
if (dfd == null || !dfd.HasSymbol) {
|
|
return false;
|
|
}
|
|
int labelOffset = proj.FindLabelOffsetByName(dfd.SymbolRef.Label);
|
|
if (labelOffset <= offset) {
|
|
// Doesn't exist, or is backward reference.
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Configures some common format config items from the app settings. Uses a
|
|
/// passed-in settings object, rather than the global settings.
|
|
/// </summary>
|
|
/// <param name="settings">Application settings.</param>
|
|
/// <param name="config">Format config struct.</param>
|
|
public static void ConfigureFormatterFromSettings(AppSettings settings,
|
|
ref Formatter.FormatConfig config) {
|
|
config.mUpperHexDigits =
|
|
settings.GetBool(AppSettings.FMT_UPPER_HEX_DIGITS, false);
|
|
config.mUpperOpcodes =
|
|
settings.GetBool(AppSettings.FMT_UPPER_OP_MNEMONIC, false);
|
|
config.mUpperPseudoOpcodes =
|
|
settings.GetBool(AppSettings.FMT_UPPER_PSEUDO_OP_MNEMONIC, false);
|
|
config.mUpperOperandA =
|
|
settings.GetBool(AppSettings.FMT_UPPER_OPERAND_A, false);
|
|
config.mUpperOperandS =
|
|
settings.GetBool(AppSettings.FMT_UPPER_OPERAND_S, false);
|
|
config.mUpperOperandXY =
|
|
settings.GetBool(AppSettings.FMT_UPPER_OPERAND_XY, false);
|
|
config.mSpacesBetweenBytes =
|
|
settings.GetBool(AppSettings.FMT_SPACES_BETWEEN_BYTES, false);
|
|
config.mAddSpaceLongComment =
|
|
settings.GetBool(AppSettings.FMT_ADD_SPACE_FULL_COMMENT, true);
|
|
|
|
config.mForceAbsOpcodeSuffix =
|
|
settings.GetString(AppSettings.FMT_OPCODE_SUFFIX_ABS, string.Empty);
|
|
config.mForceLongOpcodeSuffix =
|
|
settings.GetString(AppSettings.FMT_OPCODE_SUFFIX_LONG, string.Empty);
|
|
config.mForceAbsOperandPrefix =
|
|
settings.GetString(AppSettings.FMT_OPERAND_PREFIX_ABS, string.Empty);
|
|
config.mForceLongOperandPrefix =
|
|
settings.GetString(AppSettings.FMT_OPERAND_PREFIX_LONG, string.Empty);
|
|
|
|
string exprMode = settings.GetString(AppSettings.FMT_EXPRESSION_MODE, string.Empty);
|
|
config.mExpressionMode = Formatter.FormatConfig.ParseExpressionMode(exprMode);
|
|
}
|
|
}
|
|
}
|