private void OpToString(MachineOperand op, MachineInstructionWriter writer)
{
if (op is ImmediateOperand)
{
writer.Write("#" + op.ToString());
}
else
{
writer.Write(op.ToString());
}
}
private void Write(MachineOperand op, MachineInstructionWriter writer)
{
var reg = op as RegisterOperand;
if (reg != null)
{
writer.Write("%{0}", reg.Register.Name);
return;
}
var imm = op as ImmediateOperand;
if (imm != null)
{
writer.Write(imm.Value.ToString());
return;
}
var mem = op as MemoryOperand;
if (mem != null)
{
mem.Write(false, writer);
return;
}
var idx = op as IndexedMemoryOperand;
if (idx != null)
{
idx.Write(false, writer);
return;
}
writer.Write(op.ToString());
}
public Expression RewriteUnary(
MachineOperand operand,
Address addrInstr,
PrimitiveType dataWidth,
Func<Expression, Expression> opGen)
{
var reg = operand as RegisterOperand;
if (reg != null)
{
Expression r = frame.EnsureRegister(reg.Register);
if (r.DataType.Size > dataWidth.Size)
{
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(m.Cast(dataWidth, r)));
m.Assign(r, m.Dpb(r, tmp, 0, dataWidth.BitSize));
return tmp;
}
else
{
m.Assign(r, opGen(r));
return r;
}
}
var addr = operand as M68kAddressOperand;
if (addr != null)
{
var load = m.Load(dataWidth, addr.Address);
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(load));
m.Assign(load, tmp);
return tmp;
}
var mem = operand as MemoryOperand;
if (mem != null)
{
var load = RewriteMemoryAccess(mem, dataWidth, addrInstr);
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(load));
m.Assign(RewriteMemoryAccess(mem,dataWidth, addrInstr), tmp);
return tmp;
}
var post = operand as PostIncrementMemoryOperand;
if (post != null)
{
var r = frame.EnsureRegister(post.Register);
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(m.Load(dataWidth, r)));
m.Assign(m.Load(dataWidth, r), tmp);
m.Assign(r, m.IAdd(r, dataWidth.Size));
return tmp;
}
var pre = operand as PredecrementMemoryOperand;
if (pre != null)
{
var r = frame.EnsureRegister(pre.Register);
m.Assign(r, m.ISub(r, dataWidth.Size));
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(m.Load(dataWidth, r)));
m.Assign(m.Load(dataWidth, r), tmp);
return tmp;
}
throw new NotImplementedException("Unimplemented RewriteUnary for operand type " + operand.ToString());
}
public Expression RewriteDst(MachineOperand operand, Address addrInstr, PrimitiveType dataWidth, Expression src, Func<Expression ,Expression, Expression> opGen)
{
var reg = operand as RegisterOperand;
if (reg != null)
{
Expression r = frame.EnsureRegister(reg.Register);
Expression tmp = r;
if (dataWidth != null && reg.Width.BitSize > dataWidth.BitSize)
{
Expression rSub = m.Cast(dataWidth, r);
var srcExp = opGen(src, rSub);
if (srcExp is Identifier || srcExp is Constant || srcExp is DepositBits)
{
tmp = srcExp;
}
else
{
tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, srcExp);
}
src = m.Dpb(r, tmp, 0, dataWidth.BitSize);
}
else
{
src = opGen(src, r);
}
m.Assign(r, src);
return tmp;
}
var dbl = operand as DoubleRegisterOperand;
if (dbl != null)
{
Identifier h = frame.EnsureRegister(dbl.Register1);
Identifier l = frame.EnsureRegister( dbl.Register2);
var d = frame.EnsureSequence(h, l, PrimitiveType.Word64);
var result = opGen(src, l);
m.Assign(d, result);
return d;
}
var addr = operand as M68kAddressOperand;
if (addr != null)
{
var load = m.Load(dataWidth, addr.Address);
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(src, load));
m.Assign(load, tmp);
return tmp;
}
var mem = operand as MemoryOperand;
if (mem != null)
{
var load = RewriteMemoryAccess(mem, dataWidth, addrInstr);
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(src, load));
m.Assign(load, tmp);
return tmp;
}
var post = operand as PostIncrementMemoryOperand;
if (post != null)
{
var r = frame.EnsureRegister(post.Register);
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(src, m.Load(post.Width, r)));
m.Assign(m.Load(dataWidth, r), tmp);
m.Assign(r, m.IAdd(r, dataWidth.Size));
return tmp;
}
var pre = operand as PredecrementMemoryOperand;
if (pre != null)
{
var r = frame.EnsureRegister(pre.Register);
src = Spill(src, r);
m.Assign(r, m.ISub(r, dataWidth.Size));
var load = m.Load(dataWidth, r);
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(src, load));
m.Assign(m.Load(dataWidth, r), tmp);
return tmp;
}
var indidx = operand as IndirectIndexedOperand;
if (indidx != null)
{
Expression ea = frame.EnsureRegister(indidx.ARegister);
if (indidx.Imm8 != 0)
ea = m.IAdd(ea, Constant.Int32(indidx.Imm8));
Expression ix = frame.EnsureRegister(indidx.XRegister);
if (indidx.Scale > 1)
ix = m.IMul(ix, Constant.Int32(indidx.Scale));
var load = m.Load(dataWidth, m.IAdd(ea, ix));
var tmp = frame.CreateTemporary(dataWidth);
m.Assign(tmp, opGen(src, load));
m.Assign(load, tmp);
return tmp;
}
throw new NotImplementedException("Unimplemented RewriteDst for operand type " + operand.ToString());
}
