Split main project into core,graphics and chocolarm4 subproject (#29)

1 files changed, 122 insertions, 0 deletions

diff --git a/ChocolArm64/Instruction/AInstEmitSystem.cs b/ChocolArm64/Instruction/AInstEmitSystem.cs
new file mode 100644
index 00000000..6754be7a
--- /dev/null
+++ b/ChocolArm64/Instruction/AInstEmitSystem.cs
@@ -0,0 +1,122 @@
+using ChocolArm64.Decoder;
+using ChocolArm64.State;
+using ChocolArm64.Translation;
+using System;
+using System.Reflection;
+using System.Reflection.Emit;
+
+namespace ChocolArm64.Instruction
+{
+    static partial class AInstEmit
+    {
+        public static void Mrs(AILEmitterCtx Context)
+        {
+            AOpCodeSystem Op = (AOpCodeSystem)Context.CurrOp;
+
+            Context.EmitLdarg(ATranslatedSub.StateArgIdx);
+
+            string PropName;
+
+            switch (GetPackedId(Op))
+            {
+                case 0b11_011_0000_0000_001: PropName = nameof(AThreadState.CtrEl0);    break;
+                case 0b11_011_0000_0000_111: PropName = nameof(AThreadState.DczidEl0);  break;
+                case 0b11_011_0100_0100_000: PropName = nameof(AThreadState.Fpcr);      break;
+                case 0b11_011_0100_0100_001: PropName = nameof(AThreadState.Fpsr);      break;
+                case 0b11_011_1101_0000_010: PropName = nameof(AThreadState.TpidrEl0);  break;
+                case 0b11_011_1101_0000_011: PropName = nameof(AThreadState.Tpidr);     break;
+                case 0b11_011_1110_0000_001: PropName = nameof(AThreadState.CntpctEl0); break;
+
+                default: throw new NotImplementedException($"Unknown MRS at {Op.Position:x16}");
+            }
+
+            Context.EmitCallPropGet(typeof(AThreadState), PropName);
+
+            PropertyInfo PropInfo = typeof(AThreadState).GetProperty(PropName);
+
+            if (PropInfo.PropertyType != typeof(long) &&
+                PropInfo.PropertyType != typeof(ulong))
+            {
+                Context.Emit(OpCodes.Conv_U8);
+            }
+
+            Context.EmitStintzr(Op.Rt);
+        }
+
+        public static void Msr(AILEmitterCtx Context)
+        {
+            AOpCodeSystem Op = (AOpCodeSystem)Context.CurrOp;
+
+            Context.EmitLdarg(ATranslatedSub.StateArgIdx);
+            Context.EmitLdintzr(Op.Rt);
+
+            string PropName;
+
+            switch (GetPackedId(Op))
+            {
+                case 0b11_011_0100_0100_000: PropName = nameof(AThreadState.Fpcr);     break;
+                case 0b11_011_0100_0100_001: PropName = nameof(AThreadState.Fpsr);     break;
+                case 0b11_011_1101_0000_010: PropName = nameof(AThreadState.TpidrEl0); break;
+
+                default: throw new NotImplementedException($"Unknown MSR at {Op.Position:x16}");
+            }
+
+            PropertyInfo PropInfo = typeof(AThreadState).GetProperty(PropName);
+
+            if (PropInfo.PropertyType != typeof(long) &&
+                PropInfo.PropertyType != typeof(ulong))
+            {
+                Context.Emit(OpCodes.Conv_U4);
+            }
+
+            Context.EmitCallPropSet(typeof(AThreadState), PropName);
+        }
+
+        public static void Nop(AILEmitterCtx Context)
+        {
+            //Do nothing.
+        }
+
+        public static void Sys(AILEmitterCtx 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.
+            AOpCodeSystem Op = (AOpCodeSystem)Context.CurrOp;
+
+            switch (GetPackedId(Op))
+            {
+                case 0b11_011_0111_0100_001:
+                {
+                    //DC ZVA
+                    for (int Offs = 0; Offs < (4 << AThreadState.DczSizeLog2); Offs += 8)
+                    {
+                        Context.EmitLdarg(ATranslatedSub.MemoryArgIdx);
+                        Context.EmitLdint(Op.Rt);
+                        Context.EmitLdc_I(Offs);
+
+                        Context.Emit(OpCodes.Add);
+
+                        Context.EmitLdc_I8(0);
+
+                        AInstEmitMemoryHelper.EmitWriteCall(Context, 3);
+                    }
+                    break;
+                }
+            }
+        }
+
+        private static int GetPackedId(AOpCodeSystem 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;
+        }
+    }
+}
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