public static void Mrc(ArmEmitterContext context)
{
OpCode32System op = (OpCode32System)context.CurrOp;
if (op.Coproc != 15)
{
InstEmit.Und(context);
return;
}
if (op.Opc1 != 0)
{
throw new NotImplementedException($"Unknown MRC Opc1 0x{op.Opc1:X16} at 0x{op.Address:X16}.");
}
Delegate dlg;
switch (op.CRn)
{
case 13: // Process and Thread Info.
if (op.CRm != 0)
{
throw new NotImplementedException($"Unknown MRC CRm 0x{op.CRm:X16} at 0x{op.Address:X16}.");
}
switch (op.Opc2)
{
case 2:
dlg = new _U32(NativeInterface.GetTpidrEl032); break;
case 3:
dlg = new _U32(NativeInterface.GetTpidr32); break;
default:
throw new NotImplementedException($"Unknown MRC Opc2 0x{op.Opc2:X16} at 0x{op.Address:X16}.");
}
break;
default:
throw new NotImplementedException($"Unknown MRC 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
}
if (op.Rt == RegisterAlias.Aarch32Pc)
{
// Special behavior: copy NZCV flags into APSR.
EmitSetNzcv(context, context.Call(dlg));
return;
}
else
{
SetIntA32(context, op.Rt, context.Call(dlg));
}
}
public static void Vmrs(ArmEmitterContext context)
{
OpCode32SimdSpecial op = (OpCode32SimdSpecial)context.CurrOp;
if (op.Rt == RegisterAlias.Aarch32Pc && op.Sreg == 0b0001)
{
// Special behavior: copy NZCV flags into APSR.
SetFlag(context, PState.VFlag, GetFpFlag(FPState.VFlag));
SetFlag(context, PState.CFlag, GetFpFlag(FPState.CFlag));
SetFlag(context, PState.ZFlag, GetFpFlag(FPState.ZFlag));
SetFlag(context, PState.NFlag, GetFpFlag(FPState.NFlag));
return;
}
Delegate dlg;
switch (op.Sreg)
{
case 0b0000: // FPSID
throw new NotImplementedException("Supervisor Only");
case 0b0001: // FPSCR
dlg = new _U32(NativeInterface.GetFpscr); break;
case 0b0101: // MVFR2
throw new NotImplementedException("MVFR2");
case 0b0110: // MVFR1
throw new NotImplementedException("MVFR1");
case 0b0111: // MVFR0
throw new NotImplementedException("MVFR0");
case 0b1000: // FPEXC
throw new NotImplementedException("Supervisor Only");
default:
throw new NotImplementedException($"Unknown VMRS 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
}
SetIntA32(context, op.Rt, context.Call(dlg));
}
