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ARMeilleure: Implement TPIDR2_EL0 (#280)

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This is an implementation of the TPIDR2_EL0 register. There may be more
potential use-cases for this register not included in this PR, but this
implements the use-case seen in SuperTuxKart.
This commit is contained in:
Luke Warner 2024-11-19 14:02:24 -05:00 committed by Evan Husted
parent f8c53f03fd
commit 0cf125a4d9
2 changed files with 26 additions and 0 deletions
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17
src/ARMeilleure/Instructions/InstEmitSystem.cs
View file

@ -49,6 +49,9 @@ namespace ARMeilleure.Instructions
case 0b11_011_1101_0000_011:
EmitGetTpidrroEl0(context);
return;
case 0b11_011_1101_0000_101:
EmitGetTpidr2El0(context);
return;
case 0b11_011_1110_0000_000:
info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntfrqEl0));
break;
@ -84,6 +87,9 @@ namespace ARMeilleure.Instructions
case 0b11_011_1101_0000_010:
EmitSetTpidrEl0(context);
return;
case 0b11_011_1101_0000_101:
EmitGetTpidr2El0(context);
return;
default:
throw new NotImplementedException($"Unknown MSR 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
@ -213,6 +219,17 @@ namespace ARMeilleure.Instructions
SetIntOrZR(context, op.Rt, result);
}
private static void EmitGetTpidr2El0(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
Operand nativeContext = context.LoadArgument(OperandType.I64, 0);
Operand result = context.Load(OperandType.I64, context.Add(nativeContext, Const((ulong)NativeContext.GetTpidr2El0Offset())));
SetIntOrZR(context, op.Rt, result);
}
private static void EmitSetNzcv(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;

9
src/ARMeilleure/State/NativeContext.cs
View file

@ -21,6 +21,7 @@ namespace ARMeilleure.State
public ulong ExclusiveValueLow;
public ulong ExclusiveValueHigh;
public int Running;
public long Tpidr2El0;
}
private static NativeCtxStorage _dummyStorage = new();
@ -176,6 +177,9 @@ namespace ARMeilleure.State
public long GetTpidrroEl0() => GetStorage().TpidrroEl0;
public void SetTpidrroEl0(long value) => GetStorage().TpidrroEl0 = value;
public long GetTpidr2El0() => GetStorage().Tpidr2El0;
public void SetTpidr2El0(long value) => GetStorage().Tpidr2El0 = value;
public int GetCounter() => GetStorage().Counter;
public void SetCounter(int value) => GetStorage().Counter = value;
@ -232,6 +236,11 @@ namespace ARMeilleure.State
return StorageOffset(ref _dummyStorage, ref _dummyStorage.TpidrroEl0);
}
public static int GetTpidr2El0Offset()
{
return StorageOffset(ref _dummyStorage, ref _dummyStorage.Tpidr2El0);
}
public static int GetCounterOffset()
{
return StorageOffset(ref _dummyStorage, ref _dummyStorage.Counter);