message: Be honnest about {u/i}128 support
diff: @@ -31,7 +31,7 @@ fn cton_type_from_ty(ty: Ty) -> Option<types::Type> {
  UintTy::U16 => types::I16,
  UintTy::U32 => types::I32,
  UintTy::U64 => types::I64,
  - UintTy::U128 => types::I64X2,
  + UintTy::U128 => unimplemented!(),
  UintTy::Usize => types::I64,
  }
  }
  @@ -41,7 +41,7 @@ fn cton_type_from_ty(ty: Ty) -> Option<types::Type> {
  IntTy::I16 => types::I16,
  IntTy::I32 => types::I32,
  IntTy::I64 => types::I64,
  - IntTy::I128 => types::I64X2,
  + IntTy::I128 => unimplemented!(),
  IntTy::Isize => types::I64,
  }
  }
  