public static void EmitAddsVCheck(AILEmitterCtx Context)
{
//V = (Rd ^ Rn) & ~(Rn ^ Rm) < 0
Context.Emit(OpCodes.Dup);
EmitDataLoadRn(Context);
Context.Emit(OpCodes.Xor);
EmitDataLoadOpers(Context);
Context.Emit(OpCodes.Xor);
Context.Emit(OpCodes.Not);
Context.Emit(OpCodes.And);
Context.EmitLdc_I(0);
Context.Emit(OpCodes.Clt);
Context.EmitStflg((int)APState.VBit);
}
private static void EmitLoad(AILEmitterCtx Context, AccessType AccType, bool Pair)
{
AOpCodeMemEx Op = (AOpCodeMemEx)Context.CurrOp;
bool Ordered = (AccType & AccessType.Ordered) != 0;
bool Exclusive = (AccType & AccessType.Exclusive) != 0;
if (Ordered)
{
EmitBarrier(Context);
}
if (Exclusive)
{
EmitMemoryCall(Context, nameof(AMemory.SetExclusive), Op.Rn);
}
Context.EmitLdint(Op.Rn);
Context.EmitSttmp();
Context.EmitLdarg(ATranslatedSub.MemoryArgIdx);
Context.EmitLdtmp();
EmitReadZxCall(Context, Op.Size);
Context.EmitStintzr(Op.Rt);
if (Pair)
{
Context.EmitLdarg(ATranslatedSub.MemoryArgIdx);
Context.EmitLdtmp();
Context.EmitLdc_I(8 << Op.Size);
Context.Emit(OpCodes.Add);
EmitReadZxCall(Context, Op.Size);
Context.EmitStintzr(Op.Rt2);
}
}
public static void Bl(AILEmitterCtx Context)
{
AOpCodeBImmAl Op = (AOpCodeBImmAl)Context.CurrOp;
Context.EmitLdc_I(Op.Position + 4);
Context.EmitStint(AThreadState.LRIndex);
Context.EmitStoreState();
if (Context.TryOptEmitSubroutineCall())
{
//Note: the return value of the called method will be placed
//at the Stack, the return value is always a Int64 with the
//return address of the function. We check if the address is
//correct, if it isn't we keep returning until we reach the dispatcher.
Context.Emit(OpCodes.Dup);
Context.EmitLdc_I8(Op.Position + 4);
AILLabel LblContinue = new AILLabel();
Context.Emit(OpCodes.Beq_S, LblContinue);
Context.Emit(OpCodes.Ret);
Context.MarkLabel(LblContinue);
Context.Emit(OpCodes.Pop);
if (Context.CurrBlock.Next != null)
{
Context.EmitLoadState(Context.CurrBlock.Next);
}
}
else
{
Context.EmitLdc_I8(Op.Imm);
Context.Emit(OpCodes.Ret);
}
}
private static void EmitCsel(AILEmitterCtx Context, CselOperation CselOp)
{
AOpCodeCsel Op = (AOpCodeCsel)Context.CurrOp;
AILLabel LblTrue = new AILLabel();
AILLabel LblEnd = new AILLabel();
Context.EmitCondBranch(LblTrue, Op.Cond);
Context.EmitLdintzr(Op.Rm);
if (CselOp == CselOperation.Increment)
{
Context.EmitLdc_I(1);
Context.Emit(OpCodes.Add);
}
else if (CselOp == CselOperation.Invert)
{
Context.Emit(OpCodes.Not);
}
else if (CselOp == CselOperation.Negate)
{
Context.Emit(OpCodes.Neg);
}
Context.EmitStintzr(Op.Rd);
Context.Emit(OpCodes.Br_S, LblEnd);
Context.MarkLabel(LblTrue);
Context.EmitLdintzr(Op.Rn);
Context.EmitStintzr(Op.Rd);
Context.MarkLabel(LblEnd);
}
