/// <summary> /// Emits the specified platform instruction. /// </summary> /// <param name="context">The context.</param> /// <param name="emitter">The emitter.</param> protected override void Emit(Context context, MachineCodeEmitter emitter) { if (context.Result.IsRegister && context.Operand1.IsConstant) { int value = 0; if (context.Result.Register.RegisterCode == GeneralPurposeRegister.SP.Index) { if (IsConstantBetween(context.Operand1, -512, 508, out value)) { emitter.EmitK8immediateAndSingleRegister(0x00, (sbyte)(value >> 2), (byte)context.Result.Register.RegisterCode); // sub Sp, Imm (k8) } else if (IsConstantBetween(context.Operand1, -1048576, 1048575, out value)) { emitter.EmitRegisterOrConditionCodeAndK21(0x01, (byte)context.Result.Register.RegisterCode, value); // sub Sp, Imm (k21) } else throw new OverflowException(); } else { if (IsConstantBetween(context.Operand1, -128, 127, out value)) { emitter.EmitK8immediateAndSingleRegister(0x00, (sbyte)value, (byte)context.Result.Register.RegisterCode); // sub Rd, Imm (k8) } else if (IsConstantBetween(context.Operand1, -1048576, 1048575, out value)) { emitter.EmitRegisterOrConditionCodeAndK21(0x01, (byte)context.Result.Register.RegisterCode, value); // sub Rd, Imm (k21) } else throw new OverflowException(); } } else if (context.Result.IsRegister && context.Operand1.IsRegister && context.Operand2.IsConstant) { int value = 0; if (IsConstantBetween(context.Operand2, -32768, 32767, out value)) { emitter.EmitTwoRegistersAndK16(0x0C, (byte)context.Operand1.Register.RegisterCode, (byte)context.Result.Register.RegisterCode, (short)value); // sub Rd, Rs, Imm (k16) } else throw new OverflowException(); } else if ((context.Result.IsRegister) && (context.Operand1.IsRegister)) { emitter.EmitTwoRegisterInstructions(0x01, (byte)context.Result.Register.RegisterCode, (byte)context.Operand1.Register.RegisterCode); // sub Rd, Rs } else throw new Exception("Not supported combination of operands"); }
/// <summary> /// Emits the specified platform instruction. /// </summary> /// <param name="context">The context.</param> /// <param name="emitter">The emitter.</param> protected override void Emit(Context context, MachineCodeEmitter emitter) { if (context.Result is RegisterOperand && context.Operand1 is ConstantOperand) { RegisterOperand reg = context.Result as RegisterOperand; ConstantOperand op = context.Operand1 as ConstantOperand; int value = 0; if (IsConstantBetween(op, -128, 127, out value)) { emitter.EmitK8immediateAndSingleRegister(0x01, (sbyte)value, (byte)reg.Register.RegisterCode); // mov Rd, Imm (k8) } else if (IsConstantBetween(op, -1048576, 1048575, out value)) { emitter.EmitRegisterOrConditionCodeAndK21(0x03, (byte)reg.Register.RegisterCode, value); // mov Rd, Imm (k21) } else throw new OverflowException(); } else if ((context.Result is RegisterOperand) && (context.Operand1 is RegisterOperand)) { RegisterOperand destination = context.Result as RegisterOperand; RegisterOperand source = context.Operand1 as RegisterOperand; emitter.EmitTwoRegisterInstructions(0x09, (byte)source.Register.RegisterCode, (byte)destination.Register.RegisterCode); // mov Rd, Rs } //else //throw new Exception("Not supported combination of operands"); }
/// <summary> /// Emits the specified platform instruction. /// </summary> /// <param name="context">The context.</param> /// <param name="emitter">The emitter.</param> protected override void Emit(Context context, MachineCodeEmitter emitter) { if (context.Result.IsRegister && context.Operand1.IsConstant) { int value = 0; if (IsConstantBetween(context.Operand1, -128, 127, out value)) { emitter.EmitK8immediateAndSingleRegister(0x01, (sbyte)value, (byte)context.Result.Register.RegisterCode); // mov Rd, Imm (k8) } else if (IsConstantBetween(context.Operand1, -1048576, 1048575, out value)) { emitter.EmitRegisterOrConditionCodeAndK21(0x03, (byte)context.Result.Register.RegisterCode, value); // mov Rd, Imm (k21) } else throw new OverflowException(); } else if ((context.Result.IsRegister) && (context.Operand1.IsRegister)) { emitter.EmitTwoRegisterInstructions(0x09, (byte)context.Operand1.Register.RegisterCode, (byte)context.Result.Register.RegisterCode); // mov Rd, Rs } else throw new Exception("Not supported combination of operands"); }