private TestCondition GenerateTestExpression(ConditionOperand cOp, bool invert)
{
ConditionCode cc = ConditionCode.ALWAYS;
FlagM flags = 0;
switch (cOp.Code)
{
case CondCode.nz: cc = invert ? ConditionCode.EQ : ConditionCode.NE; flags = FlagM.ZF; break;
case CondCode.z: cc = invert ? ConditionCode.NE : ConditionCode.EQ; flags = FlagM.ZF; break;
case CondCode.nc: cc = invert ? ConditionCode.ULT : ConditionCode.UGE; flags = FlagM.CF; break;
case CondCode.c: cc = invert ? ConditionCode.UGE : ConditionCode.ULT; flags = FlagM.CF; break;
case CondCode.po: cc = invert ? ConditionCode.PE : ConditionCode.PO; flags = FlagM.PF; break;
case CondCode.pe: cc = invert ? ConditionCode.PO : ConditionCode.PE; flags = FlagM.PF; break;
case CondCode.p: cc = invert ? ConditionCode.SG : ConditionCode.NS; flags = FlagM.PF; break;
case CondCode.m: cc = invert ? ConditionCode.NS : ConditionCode.SG; flags = FlagM.PF; break;
}
return(emitter.Test(
cc,
FlagGroup(flags)));
}
private void EmitBranch(ConditionOperand cOp, Address dst)
{
m.Branch(
GenerateTestExpression(cOp, false),
dst,
InstrClass.ConditionalTransfer);
}
private void EmitBranch(ConditionOperand cOp, ImmediateOperand dst)
{
emitter.Branch(
GenerateTestExpression(cOp, false),
Address.Ptr16(dst.Value.ToUInt16()),
RtlClass.Transfer);
}
private void EmitBranch(ConditionOperand cOp, Address dst)
{
rtlc.Class = RtlClass.ConditionalTransfer;
emitter.Branch(
GenerateTestExpression(cOp, false),
dst,
RtlClass.ConditionalTransfer);
}
