protected Operand MoveConstantToRegisterOrImmediate(Context context, Operand operand, bool allowImmediate)
{
if (operand.IsVirtualRegister || operand.IsCPURegister)
{
return(operand);
}
if (operand.IsResolvedConstant)
{
if (ARMHelper.CalculateRotatedImmediateValue(operand.ConstantUnsigned32, out uint immediate, out byte _, out byte _))
{
var constant = CreateConstant32(immediate);
if (allowImmediate)
{
return(constant);
}
var before = context.InsertBefore();
var v1 = AllocateVirtualRegister32();
before.SetInstruction(ARMv8A32.Mov, v1, constant);
return(v1);
}
if (ARMHelper.CalculateRotatedImmediateValue(~operand.ConstantUnsigned32, out uint immediate2, out byte _, out byte _))
{
var constant = CreateConstant32(immediate);
var before = context.InsertBefore();
var v1 = AllocateVirtualRegister32();
before.SetInstruction(ARMv8A32.Mov, v1, constant);
return(v1);
}
{
var before = context.InsertBefore();
var v1 = AllocateVirtualRegister32();
before.SetInstruction(ARMv8A32.Movw, v1, CreateConstant32(operand.ConstantUnsigned32 & 0xFFFF));
before.AppendInstruction(ARMv8A32.Movt, v1, v1, CreateConstant32(operand.ConstantUnsigned32 >> 16));
return(v1);
}
}
else if (operand.IsUnresolvedConstant)
{
var before = context.InsertBefore();
var v1 = AllocateVirtualRegister32();
before.SetInstruction(ARMv8A32.Movw, v1, operand);
before.AppendInstruction(ARMv8A32.Movt, v1, v1, operand);
return(v1);
}
throw new CompilerException("Error at {context} in {Method}");
}
protected Operand MoveConstantToRegister(Context context, Operand operand)
{
if (operand.IsVirtualRegister || operand.IsCPURegister)
{
return(operand);
}
if (operand.IsResolvedConstant)
{
var v1 = AllocateVirtualRegister(TypeSystem.BuiltIn.I4);
var before = context.InsertBefore();
if (operand.ConstantUnsignedInteger <= 0xFFFF)
{
before.SetInstruction(ARMv8A32.MovImm, v1, operand);
return(v1);
}
if (ARMHelper.CalculateRotatedImmediateValue(operand.ConstantUnsignedInteger, out uint immediate, out _, out _))
{
before.SetInstruction(ARMv8A32.MovImmShift, v1, CreateConstant(immediate));
return(v1);
}
if (ARMHelper.CalculateRotatedImmediateValue(~operand.ConstantUnsignedInteger, out uint immediate2, out _, out _))
{
before.SetInstruction(ARMv8A32.MvnImmShift, v1, CreateConstant(immediate2));
return(v1);
}
before.SetInstruction(ARMv8A32.MovImm, v1, CreateConstant(operand.ConstantUnsignedInteger & 0xFFFF));
before.AppendInstruction(ARMv8A32.MovtImm, v1, CreateConstant(operand.ConstantUnsignedInteger >> 16));
return(v1);
}
else if (operand.IsUnresolvedConstant)
{
var v1 = AllocateVirtualRegister(TypeSystem.BuiltIn.I4);
var before = context.InsertBefore();
before.SetInstruction(ARMv8A32.MovImm, v1, operand);
before.AppendInstruction(ARMv8A32.MovtImm, v1, v1, operand);
return(v1);
}
throw new CompilerException("Error at {context} in {Method}");
}
protected Operand CreateRotatedImmediateOperand(Context context, Operand operand)
{
if (operand.IsVirtualRegister || operand.IsCPURegister)
{
return(operand);
}
if (operand.IsResolvedConstant)
{
if (ARMHelper.CalculateRotatedImmediateValue(operand.ConstantUnsignedInteger, out uint immediate, out _, out _))
{
if (operand.ConstantUnsignedLongInteger == immediate)
{
return(operand);
}
return(CreateConstant(immediate));
}
}
return(MoveConstantToRegister(context, operand));
}
