private static void EmitAluStore(ArmEmitterContext context, Operand value)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
if (op.Rd == RegisterAlias.Aarch32Pc)
{
if (op.SetFlags)
{
// TODO: Load SPSR etc.
Operand isThumb = GetFlag(PState.TFlag);
Operand lblThumb = Label();
context.BranchIfTrue(lblThumb, isThumb);
context.Return(context.ZeroExtend32(OperandType.I64, context.BitwiseAnd(value, Const(~3))));
context.MarkLabel(lblThumb);
context.Return(context.ZeroExtend32(OperandType.I64, context.BitwiseAnd(value, Const(~1))));
}
else
{
EmitAluWritePc(context, value);
}
}
else
{
SetIntA32(context, op.Rd, value);
}
}
public static void Mov(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand m = GetAluM(context);
if (op.SetFlags)
{
EmitNZFlagsCheck(context, m);
}
EmitAluStore(context, m);
}
public static void Mov(ILEmitterCtx context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitAluLoadOper2(context);
if (op.SetFlags)
{
context.EmitZnFlagCheck();
}
EmitAluStore(context);
}
public static void Mvn(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand m = GetAluM(context);
Operand res = context.BitwiseNot(m);
if (op.SetFlags)
{
EmitNZFlagsCheck(context, res);
}
EmitAluStore(context, res);
}
public static void Cmp(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context, setCarry: false);
Operand res = context.Subtract(n, m);
EmitNZFlagsCheck(context, res);
EmitSubsCCheck(context, n, res);
EmitSubsVCheck(context, n, m, res);
}
public static void Cmp(ILEmitterCtx context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitAluLoadOpers(context, setCarry: false);
context.Emit(OpCodes.Sub);
context.EmitZnFlagCheck();
EmitSubsCCheck(context);
EmitSubsVCheck(context);
context.Emit(OpCodes.Pop);
}
public static void Mul(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context);
Operand res = context.Multiply(n, m);
if (op.SetFlags)
{
EmitNZFlagsCheck(context, res);
}
EmitAluStore(context, res);
}
public static void Eor(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context);
Operand res = context.BitwiseExclusiveOr(n, m);
if (op.SetFlags)
{
EmitNZFlagsCheck(context, res);
}
EmitAluStore(context, res);
}
public static void And(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context);
Operand res = context.BitwiseAnd(n, m);
if (ShouldSetFlags(context))
{
EmitNZFlagsCheck(context, res);
}
EmitAluStore(context, res);
}
public static void Sub(ILEmitterCtx context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitAluLoadOpers(context, setCarry: false);
context.Emit(OpCodes.Sub);
if (op.SetFlags)
{
context.EmitZnFlagCheck();
EmitSubsCCheck(context);
EmitSubsVCheck(context);
}
EmitAluStore(context);
}
public static void Rsb(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context, setCarry: false);
Operand res = context.Subtract(m, n);
if (op.SetFlags)
{
EmitNZFlagsCheck(context, res);
EmitSubsCCheck(context, m, res);
EmitSubsVCheck(context, m, n, res);
}
EmitAluStore(context, res);
}
public static void Add(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context, setCarry: false);
Operand res = context.Add(n, m);
if (op.SetFlags)
{
EmitNZFlagsCheck(context, res);
EmitAddsCCheck(context, n, res);
EmitAddsVCheck(context, n, m, res);
}
EmitAluStore(context, res);
}
private static void EmitAluStore(ILEmitterCtx context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
if (op.Rd == RegisterAlias.Aarch32Pc)
{
if (op.SetFlags)
{
// TODO: Load SPSR etc.
context.EmitLdflg((int)PState.TBit);
ILLabel lblThumb = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.Emit(OpCodes.Brtrue_S, lblThumb);
context.EmitLdc_I4(~3);
context.Emit(OpCodes.Br_S, lblEnd);
context.MarkLabel(lblThumb);
context.EmitLdc_I4(~1);
context.MarkLabel(lblEnd);
context.Emit(OpCodes.And);
context.Emit(OpCodes.Conv_U8);
context.Emit(OpCodes.Ret);
}
else
{
EmitAluWritePc(context);
}
}
else
{
context.EmitStint(GetRegisterAlias(context.Mode, op.Rd));
}
}
public static void Sbc(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context, setCarry: false);
Operand res = context.Subtract(n, m);
Operand borrow = context.BitwiseExclusiveOr(GetFlag(PState.CFlag), Const(1));
res = context.Subtract(res, borrow);
if (op.SetFlags)
{
EmitNZFlagsCheck(context, res);
EmitSbcsCCheck(context, n, m);
EmitSubsVCheck(context, n, m, res);
}
EmitAluStore(context, res);
}
public static void Adc(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
Operand n = GetAluN(context);
Operand m = GetAluM(context, setCarry: false);
Operand res = context.Add(n, m);
Operand carry = GetFlag(PState.CFlag);
res = context.Add(res, carry);
if (ShouldSetFlags(context))
{
EmitNZFlagsCheck(context, res);
EmitAdcsCCheck(context, n, res);
EmitAddsVCheck(context, n, m, res);
}
EmitAluStore(context, res);
}
private static void EmitAluStore(ArmEmitterContext context, Operand value)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitGenericAluStoreA32(context, op.Rd, op.SetFlags, value);
}