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Diffstat (limited to 'ChocolArm64/Translation/AILOpCodeConst.cs')
| -rw-r--r-- | ChocolArm64/Translation/AILOpCodeConst.cs | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/ChocolArm64/Translation/AILOpCodeConst.cs b/ChocolArm64/Translation/AILOpCodeConst.cs new file mode 100644 index 00000000..80150ec5 --- /dev/null +++ b/ChocolArm64/Translation/AILOpCodeConst.cs @@ -0,0 +1,81 @@ +using System.Reflection.Emit; +using System.Runtime.InteropServices; + +namespace ChocolArm64.Translation +{ + class AILOpCodeConst : IAILEmit + { + [StructLayout(LayoutKind.Explicit, Size = 8)] + private struct ImmVal + { + [FieldOffset(0)] public int I4; + [FieldOffset(0)] public long I8; + [FieldOffset(0)] public float R4; + [FieldOffset(0)] public double R8; + } + + private ImmVal Value; + + private enum ConstType + { + Int32, + Int64, + Single, + Double + } + + private ConstType Type; + + private AILOpCodeConst(ConstType Type) + { + this.Type = Type; + } + + public AILOpCodeConst(int Value) : this(ConstType.Int32) + { + this.Value = new ImmVal { I4 = Value }; + } + + public AILOpCodeConst(long Value) : this(ConstType.Int64) + { + this.Value = new ImmVal { I8 = Value }; + } + + public AILOpCodeConst(float Value) : this(ConstType.Single) + { + this.Value = new ImmVal { R4 = Value }; + } + + public AILOpCodeConst(double Value) : this(ConstType.Double) + { + this.Value = new ImmVal { R8 = Value }; + } + + public void Emit(AILEmitter Context) + { + switch (Type) + { + case ConstType.Int32: Context.Generator.EmitLdc_I4(Value.I4); break; + + case ConstType.Int64: + { + if (Value.I8 >= int.MinValue && + Value.I8 <= int.MaxValue) + { + Context.Generator.EmitLdc_I4(Value.I4); + + Context.Generator.Emit(OpCodes.Conv_I8); + } + else + { + Context.Generator.Emit(OpCodes.Ldc_I8, Value.I8); + } + break; + } + + case ConstType.Single: Context.Generator.Emit(OpCodes.Ldc_R4, Value.R4); break; + case ConstType.Double: Context.Generator.Emit(OpCodes.Ldc_R8, Value.R8); break; + } + } + } +}
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