private static void EmitBranch(ILEmitterCtx context, OpCode ilOp)
{
OpCodeBImm64 op = (OpCodeBImm64)context.CurrOp;
if (context.CurrBlock.Branch != null)
{
context.Emit(ilOp, context.GetLabel(op.Imm));
if (context.CurrBlock.Next == null)
{
context.EmitStoreContext();
context.EmitLdc_I8(op.Position + 4);
context.Emit(OpCodes.Ret);
}
}
else
{
context.EmitStoreContext();
ILLabel lblTaken = new ILLabel();
context.Emit(ilOp, lblTaken);
context.EmitLdc_I8(op.Position + 4);
context.Emit(OpCodes.Ret);
context.MarkLabel(lblTaken);
context.EmitLdc_I8(op.Imm);
context.Emit(OpCodes.Ret);
}
}
public static void Ret(ILEmitterCtx context)
{
context.EmitStoreContext();
context.EmitLdint(RegisterAlias.Lr);
context.Emit(OpCodes.Ret);
}
public static void Bx(ILEmitterCtx context)
{
IOpCode32BReg op = (IOpCode32BReg)context.CurrOp;
context.EmitStoreContext();
EmitLoadFromRegister(context, op.Rm);
EmitBxWritePc(context);
}
public static void EmitCall(ILEmitterCtx context, long imm)
{
if (context.Tier == TranslationTier.Tier0)
{
context.EmitStoreContext();
context.TranslateAhead(imm);
context.EmitLdc_I8(imm);
context.Emit(OpCodes.Ret);
return;
}
if (!context.TryOptEmitSubroutineCall())
{
context.HasSlowCall = true;
context.EmitStoreContext();
context.TranslateAhead(imm);
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdfld(typeof(CpuThreadState).GetField(nameof(CpuThreadState.CurrentTranslator),
BindingFlags.Instance |
BindingFlags.NonPublic));
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdc_I8(imm);
context.EmitLdc_I4((int)CallType.Call);
context.EmitPrivateCall(typeof(Translator), nameof(Translator.GetOrTranslateSubroutine));
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdarg(TranslatedSub.MemoryArgIdx);
context.EmitCall(typeof(TranslatedSub), nameof(TranslatedSub.Execute));
}
EmitContinueOrReturnCheck(context);
}
public static void Br(ILEmitterCtx context)
{
OpCodeBReg64 op = (OpCodeBReg64)context.CurrOp;
context.HasIndirectJump = true;
context.EmitStoreContext();
context.EmitLdintzr(op.Rn);
EmitVirtualJump(context);
}
public static void Blr(ILEmitterCtx context)
{
OpCodeBReg64 op = (OpCodeBReg64)context.CurrOp;
context.EmitLdintzr(op.Rn);
context.EmitLdc_I(op.Position + 4);
context.EmitStint(RegisterAlias.Lr);
context.EmitStoreContext();
EmitVirtualCall(context);
}
public static void EmitStoreToRegister(ILEmitterCtx context, int register)
{
if (register == RegisterAlias.Aarch32Pc)
{
context.EmitStoreContext();
EmitBxWritePc(context);
}
else
{
context.EmitStint(GetRegisterAlias(context.Mode, register));
}
}
public static void B(ILEmitterCtx context)
{
IOpCode32BImm op = (IOpCode32BImm)context.CurrOp;
if (context.CurrBlock.Branch != null)
{
context.Emit(OpCodes.Br, context.GetLabel(op.Imm));
}
else
{
context.EmitStoreContext();
context.EmitLdc_I8(op.Imm);
context.Emit(OpCodes.Ret);
}
}
private static void EmitAluWritePc(ILEmitterCtx context)
{
context.EmitStoreContext();
if (IsThumb(context.CurrOp))
{
context.EmitLdc_I4(~1);
context.Emit(OpCodes.And);
context.Emit(OpCodes.Conv_U8);
context.Emit(OpCodes.Ret);
}
else
{
EmitBxWritePc(context);
}
}
private static void EmitExceptionCall(ILEmitterCtx context, string mthdName)
{
OpCodeException64 op = (OpCodeException64)context.CurrOp;
context.EmitStoreContext();
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdc_I8(op.Position);
context.EmitLdc_I4(op.Id);
context.EmitPrivateCall(typeof(CpuThreadState), mthdName);
//Check if the thread should still be running, if it isn't then we return 0
//to force a return to the dispatcher and then exit the thread.
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitCallPropGet(typeof(CpuThreadState), nameof(CpuThreadState.Running));
ILLabel lblEnd = new ILLabel();
context.Emit(OpCodes.Brtrue_S, lblEnd);
context.EmitLdc_I8(0);
context.Emit(OpCodes.Ret);
context.MarkLabel(lblEnd);
if (context.CurrBlock.Next != null)
{
context.EmitLoadContext();
}
else
{
context.EmitLdc_I8(op.Position + 4);
context.Emit(OpCodes.Ret);
}
}
public static void Und(ILEmitterCtx context)
{
OpCode64 op = context.CurrOp;
context.EmitStoreContext();
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdc_I8(op.Position);
context.EmitLdc_I4(op.RawOpCode);
context.EmitPrivateCall(typeof(CpuThreadState), nameof(CpuThreadState.OnUndefined));
if (context.CurrBlock.Next != null)
{
context.EmitLoadContext();
}
else
{
context.EmitLdc_I8(op.Position + 4);
context.Emit(OpCodes.Ret);
}
}