Exemplos de LC3.Instructions BR em C# (CSharp)

Exemplo n.º 1

Arquivo: ADD.cs Projeto: raccube/LC3

        public void Call(Processor processor)
        {
            var mdr           = processor[Register.MemoryData];
            var dest          = (Register)(mdr >> 9 & 0b111);
            var sr1           = (Register)(mdr >> 6 & 0b111);
            var leftVal       = processor[sr1];
            var fromImmediate = mdr >> 5 & 1;

            int rightVal;

            if (fromImmediate == 1)
            {
                rightVal = mdr & 0b1_1111;
                if (Program.Disassemble)
                {
                    Console.WriteLine($"ADD\t{dest}, {sr1}, #{rightVal:X}");
                }
            }
            else
            {
                var sr2 = (Register)(mdr & 0b111);
                rightVal = processor[sr2];
                if (Program.Disassemble)
                {
                    Console.WriteLine($"ADD\t{dest}, {sr1}, {sr2}");
                }
            }

            var result = (short)(leftVal + rightVal);

            processor[dest]          = result;
            processor[Register.Flag] = BR.MapResult(result);
        }

Exemplo n.º 2

Arquivo: LEA.cs Projeto: raccube/LC3

        public void Call(Processor processor)
        {
            var mdr      = processor[Register.MemoryData];
            var register = (Register)(mdr >> 9 & 0b111);
            var value    = mdr & 0b1_1111_1111;

            var result = (short)(processor[Register.PC] + (short)value);

            processor[register]      = result;
            processor[Register.Flag] = BR.MapResult(result);

            if (Program.Disassemble)
            {
                Console.WriteLine($"LEA\t{register}, #{value:X}");
            }
        }

Exemplo n.º 3

Arquivo: LDI.cs Projeto: raccube/LC3

        public void Call(Processor processor)
        {
            var mdr      = processor[Register.MemoryData];
            var register = (Register)(mdr >> 9 & 0b111);
            var ptr      = mdr & 0b1_1111_1111;

            var result = (short)processor.Memory[processor.Memory[ptr]];

            processor[register]      = result;
            processor[Register.Flag] = BR.MapResult(result);

            if (Program.Disassemble)
            {
                Console.WriteLine($"LDI\t{register}, #{ptr:X}");
            }
        }

Exemplo n.º 4

        public void Call(Processor processor)
        {
            var mdr          = processor[Register.MemoryData];
            var offset       = mdr & 0b11_1111;
            var baseRegister = (Register)(mdr >> 6 & 0b111);
            var dest         = (Register)(mdr >> 9 & 0b111);

            var result = (short)processor.Memory[processor[baseRegister] + offset];

            processor[dest]          = result;
            processor[Register.Flag] = BR.MapResult(result);

            if (Program.Disassemble)
            {
                Console.WriteLine($"LDR\t{dest}, {baseRegister}, #{offset:X}");
            }
        }