/// <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");
}
