protected ArrayAccess PushToHWStackAccess()
{
var stkptr = binder.EnsureRegister(arch.StackRegister);
var slot = m.ARef(PrimitiveType.Ptr32, PICRegisters.GlobalStack, stkptr);
m.Assign(stkptr, m.IAdd(stkptr, Constant.Byte(1)));
return(slot);
}
private Expression RewriteOp(MachineOperand op, bool maybe0 = false)
{
switch (op)
{
case RegisterOperand regOp:
if (maybe0)
{
if (regOp.Register == Registers.GpRegs32[31])
{
return(m.Word32(0));
}
if (regOp.Register == Registers.GpRegs64[31])
{
return(m.Word64(0));
}
}
return(binder.EnsureRegister(regOp.Register));
case ImmediateOperand immOp:
return(immOp.Value);
case AddressOperand addrOp:
return(addrOp.Address);
case VectorRegisterOperand vectorOp:
Identifier vreg;
if (vectorOp.Width.BitSize == 64)
{
vreg = binder.EnsureRegister(Registers.SimdRegs64[vectorOp.VectorRegister.Number - 32]);
}
else
{
vreg = binder.EnsureRegister(Registers.SimdRegs128[vectorOp.VectorRegister.Number - 32]);
}
if (vectorOp.Index >= 0)
{
// Treat the entire contents of the register as an array.
//$BUG Indexing is done little-endian on the CPU, but must be
// converted to big-endian to conform with the semantics of of Reko's ArrayAccess.
var eType = PrimitiveType.CreateWord(Bitsize(vectorOp.ElementType));
int index = vectorOp.Index;
return(m.ARef(eType, vreg, Constant.Int32(index)));
}
else
{
return(vreg);
}
case MemoryOperand mem:
var ea = binder.EnsureRegister(mem.Base !);
return(m.Mem(mem.Width, ea));
}
throw new NotImplementedException($"Rewriting {op.GetType().Name} not implemented yet.");
}
private Expression RewriteOp(MachineOperand op, bool maybe0 = false)
{
switch (op)
{
case RegisterOperand regOp:
if (maybe0)
{
if (regOp.Register == Registers.GpRegs32[31])
{
return(m.Word32(0));
}
if (regOp.Register == Registers.GpRegs64[31])
{
return(m.Word64(0));
}
}
return(binder.EnsureRegister(regOp.Register));
case ImmediateOperand immOp:
return(immOp.Value);
case AddressOperand addrOp:
return(addrOp.Address);
case VectorRegisterOperand vectorOp:
Identifier vreg;
if (vectorOp.Width.BitSize == 64)
{
vreg = binder.EnsureRegister(Registers.SimdRegs64[vectorOp.VectorRegister.Number - 32]);
}
else
{
vreg = binder.EnsureRegister(Registers.SimdRegs128[vectorOp.VectorRegister.Number - 32]);
}
if (vectorOp.Index >= 0)
{
var eType = PrimitiveType.CreateWord(Bitsize(vectorOp.ElementType));
return(m.ARef(eType, vreg, Constant.Int32(vectorOp.Index)));
}
else
{
return(vreg);
}
case MemoryOperand mem:
var ea = binder.EnsureRegister(mem.Base);
return(m.Mem(mem.Width, ea));
}
throw new NotImplementedException($"Rewriting {op.GetType().Name} not implemented yet.");
}
private void RewriteMov()
{
var src1 = Op(1);
var dst = Op(0);
if (instrCur.Operands.Length == 2)
{
m.Assign(dst, src1);
}
else
{
var src2 = Op(2);
m.Assign(dst, m.ARef(PrimitiveType.Word64, src1, src2));
}
}
