public static void Mrs(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
Delegate dlg;
switch (GetPackedId(op))
{
case 0b11_011_0000_0000_001: dlg = new _U64(NativeInterface.GetCtrEl0); break;
case 0b11_011_0000_0000_111: dlg = new _U64(NativeInterface.GetDczidEl0); break;
case 0b11_011_0100_0010_000: EmitGetNzcv(context); return;
case 0b11_011_0100_0100_000: dlg = new _U64(NativeInterface.GetFpcr); break;
case 0b11_011_0100_0100_001: dlg = new _U64(NativeInterface.GetFpsr); break;
case 0b11_011_1101_0000_010: dlg = new _U64(NativeInterface.GetTpidrEl0); break;
case 0b11_011_1101_0000_011: dlg = new _U64(NativeInterface.GetTpidr); break;
case 0b11_011_1110_0000_000: dlg = new _U64(NativeInterface.GetCntfrqEl0); break;
case 0b11_011_1110_0000_001: dlg = new _U64(NativeInterface.GetCntpctEl0); break;
default: throw new NotImplementedException($"Unknown MRS 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
}
SetIntOrZR(context, op.Rt, context.Call(dlg));
}
public static void Sys(ArmEmitterContext context)
{
// This instruction is used to do some operations on the CPU like cache invalidation,
// address translation and the like.
// We treat it as no-op here since we don't have any cache being emulated anyway.
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
switch (GetPackedId(op))
{
case 0b11_011_0111_0100_001:
{
// DC ZVA
Operand t = GetIntOrZR(context, op.Rt);
for (long offset = 0; offset < (4 << DczSizeLog2); offset += 8)
{
Operand address = context.Add(t, Const(offset));
context.Call(new _Void_U64_U64(NativeInterface.WriteUInt64), address, Const(0L));
}
break;
}
// No-op
case 0b11_011_0111_1110_001: //DC CIVAC
break;
}
}
public static void Sys(ArmEmitterContext context)
{
// This instruction is used to do some operations on the CPU like cache invalidation,
// address translation and the like.
// We treat it as no-op here since we don't have any cache being emulated anyway.
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
switch (GetPackedId(op))
{
case 0b11_011_0111_0100_001:
{
// DC ZVA
Operand t = GetIntOrZR(context, op.Rt);
for (long offset = 0; offset < (4 << DczSizeLog2); offset += 8)
{
Operand address = context.Add(t, Const(offset));
InstEmitMemoryHelper.EmitStore(context, address, RegisterConsts.ZeroIndex, 3);
}
break;
}
// No-op
case 0b11_011_0111_1110_001: //DC CIVAC
break;
}
}
private static void EmitSetNzcv(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
Operand t = GetIntOrZR(context, op.Rt);
t = context.ConvertI64ToI32(t);
Operand v = context.ShiftRightUI(t, Const((int)PState.VFlag));
v = context.BitwiseAnd(v, Const(1));
Operand c = context.ShiftRightUI(t, Const((int)PState.CFlag));
c = context.BitwiseAnd(c, Const(1));
Operand z = context.ShiftRightUI(t, Const((int)PState.ZFlag));
z = context.BitwiseAnd(z, Const(1));
Operand n = context.ShiftRightUI(t, Const((int)PState.NFlag));
n = context.BitwiseAnd(n, Const(1));
SetFlag(context, PState.VFlag, v);
SetFlag(context, PState.CFlag, c);
SetFlag(context, PState.ZFlag, z);
SetFlag(context, PState.NFlag, n);
}
public static void Sys(ArmEmitterContext context)
{
// This instruction is used to do some operations on the CPU like cache invalidation,
// address translation and the like.
// We treat it as no-op here since we don't have any cache being emulated anyway.
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
switch (GetPackedId(op))
{
case 0b11_011_0111_0100_001:
{
// DC ZVA
Operand t = GetIntOrZR(context, op.Rt);
for (long offset = 0; offset < DczSizeInBytes; offset += 8)
{
Operand address = context.Add(t, Const(offset));
InstEmitMemoryHelper.EmitStore(context, address, RegisterConsts.ZeroIndex, 3);
}
break;
}
// No-op
case 0b11_011_0111_1110_001: // DC CIVAC
break;
case 0b11_011_0111_0101_001: // IC IVAU
Operand target = Register(op.Rt, RegisterType.Integer, OperandType.I64);
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.InvalidateCacheLine)), target);
break;
}
}
public static void Mrs(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
MethodInfo info;
switch (GetPackedId(op))
{
case 0b11_011_0000_0000_001: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCtrEl0)); break;
case 0b11_011_0000_0000_111: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetDczidEl0)); break;
case 0b11_011_0100_0010_000: EmitGetNzcv(context); return;
case 0b11_011_0100_0100_000: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpcr)); break;
case 0b11_011_0100_0100_001: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpsr)); break;
case 0b11_011_1101_0000_010: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrEl0)); break;
case 0b11_011_1101_0000_011: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrroEl0)); break;
case 0b11_011_1110_0000_000: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntfrqEl0)); break;
case 0b11_011_1110_0000_001: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntpctEl0)); break;
case 0b11_011_1110_0000_010: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntvctEl0)); break;
default: throw new NotImplementedException($"Unknown MRS 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
}
SetIntOrZR(context, op.Rt, context.Call(info));
}
private static int GetPackedId(OpCodeSystem op)
{
int id;
id = op.Op2 << 0;
id |= op.CRm << 3;
id |= op.CRn << 7;
id |= op.Op1 << 11;
id |= op.Op0 << 14;
return(id);
}
private static void EmitGetNzcv(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
Operand vSh = context.ShiftLeft(GetFlag(PState.VFlag), Const((int)PState.VFlag));
Operand cSh = context.ShiftLeft(GetFlag(PState.CFlag), Const((int)PState.CFlag));
Operand zSh = context.ShiftLeft(GetFlag(PState.ZFlag), Const((int)PState.ZFlag));
Operand nSh = context.ShiftLeft(GetFlag(PState.NFlag), Const((int)PState.NFlag));
Operand nzcvSh = context.BitwiseOr(context.BitwiseOr(nSh, zSh), context.BitwiseOr(cSh, vSh));
SetIntOrZR(context, op.Rt, nzcvSh);
}
public static void Msr(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
Delegate dlg;
switch (GetPackedId(op))
{
case 0b11_011_0100_0100_000: dlg = new _Void_U64(NativeInterface.SetFpcr); break;
case 0b11_011_0100_0100_001: dlg = new _Void_U64(NativeInterface.SetFpsr); break;
case 0b11_011_1101_0000_010: dlg = new _Void_U64(NativeInterface.SetTpidrEl0); break;
default: throw new NotImplementedException($"Unknown MSR 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
}
context.Call(dlg, GetIntOrZR(context, op.Rt));
}