public List <Instruction> PutFromField(FieldSRef src)
{
var code = new List <Instruction>();
if (varref.AsReg() == null)
{
code.AddRange(varref.FetchToReg(RegVRef.rScratchTab));
code.Add(new Instruction
{
opcode = Opcode.Sub,
op1 = src,
op2 = this.InRegister(RegVRef.rScratchTab),
dest = this.InRegister(RegVRef.rScratchTab),
acc = true,
});
code.AddRange(varref.PutFromReg(RegVRef.rScratchTab));
}
else
{
code.Add(new Instruction
{
opcode = Opcode.Sub,
op1 = src,
op2 = this,
dest = this,
acc = true,
});
}
return(code);
}
public List <Instruction> CodeGen()
{
var code = new List <Instruction>();
var srcreg = source.AsReg();
var tgtreg = target.AsReg();
if (srcreg == null || (srcreg != null && tgtreg != null))
{
code.AddRange(source.FetchToReg(tgtreg ?? RegVRef.rScratchTab));
}
if (tgtreg == null)
{
code.AddRange(target.PutFromReg(srcreg ?? RegVRef.rScratchTab));
}
return(code);
}