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Martin
2025-10-12 19:06:28 +02:00
commit bdee19419d
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123
STCompiler.Simulator/Program.cs Normal file
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using System;
using System.IO;
using STCompiler.Common;
using System.Collections.Generic;
class Program {
static int Main(string[] args) {
if (args.Length < 1) {
Console.WriteLine("Usage: StSim <file.stbc>");
return 1;
}
var path = args[0];
if (!File.Exists(path)) { Console.WriteLine("File not found: " + path); return 2; }
var data = File.ReadAllBytes(path);
try { Simulate(data); } catch(Exception ex) { Console.WriteLine("Error: " + ex.Message); return 3; }
return 0;
}
static void Simulate(byte[] data) {
using var ms = new MemoryStream(data);
using var r = new BinaryReader(ms);
string magic = System.Text.Encoding.ASCII.GetString(r.ReadBytes(4));
if (magic != Bytecode.Magic) throw new Exception("Invalid magic");
ushort ver = r.ReadUInt16();
if (ver != Bytecode.Version) throw new Exception($"Unsupported version {ver}");
ushort nConsts = r.ReadUInt16();
var consts = new List<object>();
for (int i = 0; i < nConsts; i++) {
byte t = r.ReadByte();
switch(t) {
case 1: consts.Add(r.ReadInt64()); break;
case 2: consts.Add(r.ReadDouble()); break;
case 3: consts.Add(r.ReadSingle()); break;
case 4: consts.Add(r.ReadInt32()); break;
default: throw new Exception($"Unknown const type {t}");
}
}
ushort nVars = r.ReadUInt16();
var varTypes = new VarType[nVars];
for (int i = 0; i < nVars; i++) varTypes[i] = (VarType)r.ReadByte();
ushort codeLen = r.ReadUInt16();
var code = r.ReadBytes(codeLen);
var stack = new Stack<object>();
var vars = new object[nVars];
int ip = 0;
while (ip < code.Length) {
byte op = code[ip++];
switch(op) {
case Bytecode.OpCodes.NOP: break;
case Bytecode.OpCodes.PUSH_CONST: {
ushort ci = (ushort)(code[ip++] | (code[ip++] << 8));
stack.Push(consts[ci]);
break;
}
case Bytecode.OpCodes.PUSH_REAL_CONST: {
ushort ci = (ushort)(code[ip++] | (code[ip++] << 8));
stack.Push(consts[ci]);
break;
}
case Bytecode.OpCodes.LOAD_VAR: {
ushort vi = (ushort)(code[ip++] | (code[ip++] << 8));
stack.Push(vars[vi]);
break;
}
case Bytecode.OpCodes.STORE_VAR: {
ushort vi = (ushort)(code[ip++] | (code[ip++] << 8));
vars[vi] = stack.Pop();
break;
}
case Bytecode.OpCodes.JZ: {
ushort target = (ushort)(code[ip++] | (code[ip++] << 8));
var cond = stack.Pop();
bool isFalse = cond is int ci ? ci == 0 : cond is long cl ? cl == 0L : cond is double cd ? cd == 0.0 : cond == null;
if (isFalse) ip = target;
break;
}
case Bytecode.OpCodes.JMP: {
ushort target = (ushort)(code[ip++] | (code[ip++] << 8));
ip = target;
break;
}
case Bytecode.OpCodes.HALT:
Console.WriteLine("HALT");
return;
default:
// Simple arithmetic handlers for some opcodes
if (Bytecode.OpName(op).StartsWith("ADD_")) {
dynamic b = stack.Pop(); dynamic a = stack.Pop(); stack.Push(a + b); break;
}
if (Bytecode.OpName(op).StartsWith("SUB_")) {
dynamic b = stack.Pop(); dynamic a = stack.Pop(); stack.Push(a - b); break;
}
if (Bytecode.OpName(op).StartsWith("MUL_")) {
dynamic b = stack.Pop(); dynamic a = stack.Pop(); stack.Push(a * b); break;
}
if (Bytecode.OpName(op).StartsWith("DIV_")) {
dynamic b = stack.Pop(); dynamic a = stack.Pop(); stack.Push(a / b); break;
}
if (Bytecode.OpName(op).StartsWith("LT_") || Bytecode.OpName(op).StartsWith("GT_") || Bytecode.OpName(op).StartsWith("LE_") || Bytecode.OpName(op).StartsWith("GE_") || Bytecode.OpName(op).StartsWith("EQ_") || Bytecode.OpName(op).StartsWith("NEQ_")) {
// comparisons: pop r, pop l, push int 0/1
dynamic rVal = stack.Pop(); dynamic lVal = stack.Pop();
bool res = Bytecode.OpName(op).StartsWith("LT_") ? (lVal < rVal) :
Bytecode.OpName(op).StartsWith("GT_") ? (lVal > rVal) :
Bytecode.OpName(op).StartsWith("LE_") ? (lVal <= rVal) :
Bytecode.OpName(op).StartsWith("GE_") ? (lVal >= rVal) :
Bytecode.OpName(op).StartsWith("EQ_") ? (lVal == rVal) :
(lVal != rVal);
stack.Push(res ? 1 : 0);
break;
}
throw new Exception($"Unknown opcode 0x{op:X2}");
}
}
Console.WriteLine("Execution finished");
for (int i = 0; i < vars.Length; i++) Console.WriteLine($"Var[{i}] = {vars[i]}");
}
}

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STCompiler.Simulator/STCompiler.Simulator.csproj Normal file
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<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\STCompiler.Common\STCompiler.Common.csproj" />
</ItemGroup>
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STCompiler.Simulator/obj/Debug/net8.0/.NETCoreApp,Version=v8.0.AssemblyAttributes.cs Normal file
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// <autogenerated />
using System;
using System.Reflection;
[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v8.0", FrameworkDisplayName = ".NET 8.0")]

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STCompiler.Simulator/obj/Debug/net8.0/STCompiler.Simulator.AssemblyInfo.cs Normal file
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//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
using System;
using System.Reflection;
[assembly: System.Reflection.AssemblyCompanyAttribute("STCompiler.Simulator")]
[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
[assembly: System.Reflection.AssemblyProductAttribute("STCompiler.Simulator")]
[assembly: System.Reflection.AssemblyTitleAttribute("STCompiler.Simulator")]
[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
// Generated by the MSBuild WriteCodeFragment class.

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STCompiler.Simulator/obj/Debug/net8.0/STCompiler.Simulator.GeneratedMSBuildEditorConfig.editorconfig Normal file
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build_property.UsingMicrosoftNETSdkWeb =
build_property.ProjectTypeGuids =
build_property.InvariantGlobalization =
build_property.PlatformNeutralAssembly =
build_property.EnforceExtendedAnalyzerRules =
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build_property.RootNamespace = STCompiler.Simulator
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build_property.EnableComHosting =
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STCompiler.Simulator/obj/Debug/net8.0/STCompiler.Simulator.GlobalUsings.g.cs Normal file
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// <auto-generated/>
global using global::System;
global using global::System.Collections.Generic;
global using global::System.IO;
global using global::System.Linq;
global using global::System.Net.Http;
global using global::System.Threading;
global using global::System.Threading.Tasks;

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