Jump and Call are working as intended.

examples/hello.s

@@ -3,8 +3,10 @@ text0 "Hello, World!\n"
 file_name "example.txt"
 .code:
 sd.int32 $4 123
-write_file:
 sd.int32 $20 -4
+sd.int64 $20 label0
+jmp 20
+write_file:
 sd.int32 $10 file_name
 sd.int32 $11 11
 sd.int32 $12 1
@@ -13,6 +15,9 @@ sd.int32 $11 text0
 sd.int32 $12 14
 sys 4
 return
+label0:
+sd.int64 $20 write_file
+call 20
 sd.int32 $10 100
 sys 1
 bmath add Int32 $4 $5 $6

src/SVM.Advanced/BSDStyleVM/BSDLikeWrapper.cs

@@ -60,6 +60,7 @@ namespace SVM.Advanced.BSDStyleVM
 		public static void __exit(SimpleVirtualMachine machine)
 		{
 			var status = machine.registers.GetData<int>(10);
+			Console.WriteLine($"Bye with {status}.");
 			Environment.Exit(status);
 		}
 		public unsafe static void __open(SimpleVirtualMachine machine)
@@ -81,7 +82,7 @@ namespace SVM.Advanced.BSDStyleVM
 				var stream = File.Open(fn, fm, fa);
 				FileDescripter fd = new FileDescripter(stream);
 				w.FDs.Add(fdID, fd);
-				machine.registers.SetDataInRegister<int>(10,fdID);
+				machine.registers.SetDataInRegister<int>(10, fdID);
 			}
 			else
 			{
@@ -97,7 +98,9 @@ namespace SVM.Advanced.BSDStyleVM
 				var size = machine.registers.GetData<ulong>(12);
 				if (w.FDs.TryGetValue(fd, out var descripter))
 				{
+					Console.Write("\"");
 					Console.OpenStandardOutput().WriteData(machine.GetPointer(ptr), size);
+					Console.WriteLine($"\">>{fd}");
 					descripter.stream.WriteData(machine.GetPointer(ptr), size);
 					descripter.stream.Flush();
 				}

src/SVM.Assembler.Core/Assembler.cs

@@ -18,8 +18,8 @@ Register \${D}+
 LabelCode \.code\:
 LabelData \.data\:
 LabelConst \.const\:
-word [\w\d\.]+
 GenericLabel {word}\:
+word [\w\d\.]+
 LineEnd \n
 string ""\"".*\""""
 Number \d+
@@ -133,7 +133,7 @@ LabelConstant InternalLbl
 				}
 				if (!item.AllowedTokenIds.Contains(next.Result.LexSegmentId))
 				{
-					operationResult.AddError(new ErrorWMsg($"Token: {LexDef.Content ?? "<null>"} is not allowed here.", LexDef));
+					operationResult.AddError(new ErrorWMsg($"Token: {LexDef.Content ?? "<null>"} is not allowed here. Current context:{instructionDef.Id}", LexDef));
 					return operationResult;
 				}
 				intermediateInstruction.Parameters.Add(next.Result);

src/SVM.Assembler.Core/Linker.cs

@@ -61,6 +61,10 @@ namespace SVM.Assembler.Core
 			}
 			else
 			{
+				if (TryParseUInt8(input, context, out registerID))
+				{
+					return true;
+				}
 				if (context.IntermediateObject.TryGetConst(input, out var realStr))
 				{
 					return TryParseRegister(realStr, context, out registerID);

src/SVM.Assembler.Core/LinkingContext.cs

@@ -21,7 +21,7 @@ namespace SVM.Assembler.Core
 			if (DataOffsets.TryGetValue(label, out offset))
 			{
 				//Don't directly give the length there.
-				offset += (uint)IntermediateObject.DetermineFinalInstructionCount(this) * (uint)sizeof(SVMInstruction)+sizeof(int);
+				offset += (uint)IntermediateObject.DetermineFinalInstructionCount(this) * (uint)sizeof(SVMInstruction) + sizeof(int);
 				return true;
 			}
 			return false;
@@ -33,16 +33,18 @@ namespace SVM.Assembler.Core
 			{
 				return true;
 			}
+			int acc=0;
 			for (int i = 0; i < IntermediateObject.instructions.Count; i++)
 			{
 				IntermediateInstruction? item = IntermediateObject.instructions[i];
 				if (item.Label != null)
 					if (item.Label.Content == label)
 					{
-						this.label.Add(label, i);
+						this.label.Add(label, acc);
-						offset = i;
+						offset = acc;
 						return true;
 					}
+				acc += Definition.InstructionDefinitions[item.InstDefID].InstructionCount;
 			}
 			return false;
 		}

src/SVM.Assembler/ISA.xml

@@ -52,7 +52,7 @@
 				</InstructionParameter>
 			</Parameters>
 		</InstructionDefinition>
-		<InstructionDefinition Id="std.int32" PrimaryInstruction="SD" InstructionCount="2">
+		<InstructionDefinition Id="sd.int32" PrimaryInstruction="SD" InstructionCount="2">
 			<Aliases>
 				<Alias Name="sd.int"/>
 				<Alias Name="sd.int32"/>
@@ -112,7 +112,7 @@
 				</InstructionParameter>
 			</Parameters>
 		</InstructionDefinition>
-		<InstructionDefinition Id="call" PrimaryInstruction="Call" InstructionCount="2">
+		<InstructionDefinition Id="call" PrimaryInstruction="Call" InstructionCount="1">
 			<Aliases>
 				<Alias Name="call"/>
 				<Alias Name="c"/>
@@ -122,8 +122,49 @@
 					<MatchingItems>
 						<Item Id="Number"/>
 						<Item Id="Word"/>
+						<Item Id="Register"/>
 					</MatchingItems>
-					<ExpectedValue Type="Int64" Pos="8" Converter="Integer64" />
+					<ExpectedValue Type="UInt8" Pos="1" Converter="Register" />
+				</InstructionParameter>
+			</Parameters>
+		</InstructionDefinition>
+		<InstructionDefinition Id="jmp" PrimaryInstruction="JMP" InstructionCount="1">
+			<Aliases>
+				<Alias Name="j"/>
+				<Alias Name="jmp"/>
+			</Aliases>
+			<Parameters>
+				<InstructionParameter>
+					<MatchingItems>
+						<Item Id="Number"/>
+						<Item Id="Word"/>
+						<Item Id="Register"/>
+					</MatchingItems>
+					<ExpectedValue Type="UInt8" Pos="1" Converter="Register" />
+				</InstructionParameter>
+			</Parameters>
+		</InstructionDefinition>
+		<InstructionDefinition Id="jif" PrimaryInstruction="JIF" InstructionCount="1">
+			<Aliases>
+				<Alias Name="jif"/>
+				<Alias Name="jf"/>
+				<Alias Name="jmpif"/>
+			</Aliases>
+			<Parameters>
+				<InstructionParameter>
+					<MatchingItems>
+						<Item Id="Number"/>
+						<Item Id="Word"/>
+						<Item Id="Register"/>
+					</MatchingItems>
+					<ExpectedValue Type="UInt8" Pos="1" Converter="Register" />
+				</InstructionParameter>
+				<InstructionParameter>
+					<MatchingItems>
+						<Item Id="Number"/>
+						<Item Id="Word"/>
+					</MatchingItems>
+					<ExpectedValue Type="UInt8" Pos="2" Converter="UInt8" />
 				</InstructionParameter>
 			</Parameters>
 		</InstructionDefinition>
@@ -133,13 +174,6 @@
 				<Alias Name="ret"/>
 			</Aliases>
 			<Parameters>
-				<InstructionParameter>
-					<MatchingItems>
-						<Item Id="Number"/>
-						<Item Id="Word"/>
-					</MatchingItems>
-					<ExpectedValue Type="Int32" Pos="4" Converter="Integer32" />
-				</InstructionParameter>
 			</Parameters>
 		</InstructionDefinition>
 		<InstructionDefinition Id="load" PrimaryInstruction="Load" InstructionCount="1">
@@ -200,34 +234,5 @@
 				</InstructionParameter>
 			</Parameters>
 		</InstructionDefinition>
-		<InstructionDefinition Id="load" PrimaryInstruction="Save" InstructionCount="1">
-			<Aliases>
-				<Alias Name="load"/>
-				<Alias Name="ld"/>
-			</Aliases>
-			<Parameters>
-				<InstructionParameter>
-					<MatchingItems>
-						<Item Id="Register"/>
-						<Item Id="Word"/>
-					</MatchingItems>
-					<ExpectedValue Type="UInt8" Pos="1" Converter="Register" />
-				</InstructionParameter>
-				<InstructionParameter>
-					<MatchingItems>
-						<Item Id="Number"/>
-						<Item Id="Word"/>
-					</MatchingItems>
-					<ExpectedValue Type="UInt8" Pos="2" Converter="UInt8" />
-				</InstructionParameter>
-				<InstructionParameter>
-					<MatchingItems>
-						<Item Id="Register"/>
-						<Item Id="Word"/>
-					</MatchingItems>
-					<ExpectedValue Type="UInt8" Pos="3" Converter="Register" />
-				</InstructionParameter>
-			</Parameters>
-		</InstructionDefinition>
 	</Definitions>
 </ISARoot>

src/SVM.Assembler/Program.cs

@@ -75,6 +75,10 @@ namespace SVM.Assembler
 				if (fResult.HasError())
 				{
 					Console.Error.WriteLine("Finalizer error!");
+					foreach (var item in fResult.Errors)
+					{
+						Console.Error.WriteLine(item.ToString());
+					}
 					return;
 				}
 				if (fResult.Result == null)

src/SVM.Core/PrimaryInstruction.cs

@@ -26,12 +26,11 @@
 		SD,
 
 		// 0	1
-		// JMP	RD
+		// JMP	[R]TargetPC
-		// [I]Address (int32)
 		JMP,
-		// Jump And Link If Conditional Register is set.
+		// Jump If Conditional Register is set.
-		// JIF RD FlagID
+		// 0	1			2
-		// [I]Address (int32)
+		// JIF [R]TargetPC	[I]FlagID
 		JIF,
 		// 0	1			2		3
 		// Load [R]Address	[I]Len	[R]T
@@ -39,9 +38,8 @@
 		// 0	1		2		3
 		// Load [R]Src	[I]Len	[R]TAddr
 		Save,
-		// 0 
+		// 0	1
-		// Call
+		// Call [R]Address
-		// [I]Address (int64)
 		Call,
 		// Return
 		Return,
@@ -77,7 +75,7 @@
 		Float,
 		Double,
 	}
-	public enum ConditionFlag
+	public enum ConditionFlag : byte
 	{
 		/// <summary>
 		/// Compare Flag

src/SVM.Core/SimpleVirtualMachine.cs

@@ -77,6 +77,15 @@ namespace SVM.Core
 				}
 			}
 		}
+		public ulong GetPC()
+		{
+			uint PCOffset = 1;
+			if (Config != null)
+			{
+				PCOffset = Config.PCRegisterID;
+			}
+			return registers.GetData<ulong>((int)PCOffset);
+		}
 		public bool isReachBinaryEnd()
 		{
 			uint PCOffset = 1;
@@ -214,12 +223,44 @@ namespace SVM.Core
 							var dataPtr = GetPointer(PC);
 							var data = dataPtr.GetData<int>();
 							registers.SetDataInRegister(Reg, data);
-							//Console.WriteLine($"SVM:SD:{data} form PC={PC}");
+							Console.WriteLine($"SVM:SD:{data} to {Reg} form PC={PC}");
 						}
 						break;
 					case PrimaryInstruction.JMP:
+						{
+							var RegisterID = Instruction.GetData<byte>(1);
+							PC = registers.ReadData<ulong>(RegisterID);
+							Console.WriteLine($"Jump to:{PC}");
+							PC--;
+						}
 						break;
 					case PrimaryInstruction.JIF:
+						{
+							var RegisterID = Instruction.GetData<byte>(1);
+							var FlagID = Instruction.GetData<ConditionFlag>(2);
+							bool isSet = false;
+							unsafe
+							{
+
+								switch (FlagID)
+								{
+									case ConditionFlag.CF:
+										isSet = statePtr->CF != 0;
+										break;
+									case ConditionFlag.Of:
+										isSet = statePtr->OF != 0;
+										break;
+									default:
+										break;
+								}
+							}
+							if (isSet)
+							{
+
+								PC = registers.ReadData<ulong>(RegisterID);
+								PC--;
+							}
+						}
 						break;
 					case PrimaryInstruction.Load:
 						{
@@ -248,6 +289,10 @@ namespace SVM.Core
 						{
 							var cfPtr = GetPointer(ReadCallFrameRegisterAsPtr());
 							cfPtr.SetData(PC + 1);
+							var RegisterID = Instruction.GetData<byte>(1);
+							PC = registers.ReadData<ulong>(RegisterID);
+							Console.WriteLine($"Call to:{PC} ({RegisterID})");
+							PC--;
 						}
 						break;
 					case PrimaryInstruction.Return:

src/SVM.Standalone/Program.cs

@@ -30,7 +30,16 @@ class Program
 		svm.Init();
 		while (!svm.isReachBinaryEnd())
 		{
-			svm.Step();
+			try
+			{
+				svm.Step();
+			}
+			catch (Exception e)
+			{
+				Console.WriteLine($"Error at:{svm.GetPC()}");
+				Console.WriteLine(e);
+				throw;
+			}
 		}
 	}
 }

src/SVM.sln

@@ -13,6 +13,11 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SVM.Assembler", "SVM.Assemb
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SVM.Advanced", "SVM.Advanced\SVM.Advanced.csproj", "{F9F2F699-49F7-4427-BA22-B444DD6259FD}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Examples", "Examples", "{B36A84DF-456D-A817-6EDD-3EC3E7F6E11F}"
+	ProjectSection(SolutionItems) = preProject
+		..\examples\hello.s = ..\examples\hello.s
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU