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Diffstat (limited to 'ChocolArm64/Translation/ILOpCodeConst.cs')
| -rw-r--r-- | ChocolArm64/Translation/ILOpCodeConst.cs | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/ChocolArm64/Translation/ILOpCodeConst.cs b/ChocolArm64/Translation/ILOpCodeConst.cs new file mode 100644 index 00000000..5497eba1 --- /dev/null +++ b/ChocolArm64/Translation/ILOpCodeConst.cs @@ -0,0 +1,65 @@ +using System.Reflection.Emit; +using System.Runtime.InteropServices; + +namespace ChocolArm64.Translation +{ + class ILOpCodeConst : IILEmit + { + [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 ILOpCodeConst(ConstType type) + { + _type = type; + } + + public ILOpCodeConst(int value) : this(ConstType.Int32) + { + _value = new ImmVal { I4 = value }; + } + + public ILOpCodeConst(long value) : this(ConstType.Int64) + { + _value = new ImmVal { I8 = value }; + } + + public ILOpCodeConst(float value) : this(ConstType.Single) + { + _value = new ImmVal { R4 = value }; + } + + public ILOpCodeConst(double value) : this(ConstType.Double) + { + _value = new ImmVal { R8 = value }; + } + + public void Emit(ILEmitter context) + { + switch (_type) + { + case ConstType.Int32: context.Generator.EmitLdc_I4(_value.I4); break; + case ConstType.Int64: 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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