Recent research has focused on a large amount of processing such as streaming processing, big data, deep learning and so on. Since the processing time of these processes increases in proportion to the amount of calculation, an arithmetic unit that can increase the speed is required. In this situation, Field Programmable Gate Array (FPGA) has been attracting attention because it can speed up processing and reduce power consumption. However, Hardware Description Language (HDL) such as Verilog used when developing FPGA increases the development time, but also makes it difficult to guarantee memory safety. In this paper, we propose a Register Transfer Level (RTL) designing Domain Specific Language (DSL) for Rust programming language convert to RTL.