# 4-bit Bit-Slice Arithmetic Logic Unit for 32-bit RSFQ Microprocessors

@article{Tang20164bitBA, title={4-bit Bit-Slice Arithmetic Logic Unit for 32-bit RSFQ Microprocessors}, author={Guang-Ming Tang and Kensuke Takata and Masamitsu Tanaka and Akira Fujimaki and Kazuyoshi Takagi and Naofumi Takagi}, journal={IEEE Transactions on Applied Superconductivity}, year={2016}, volume={26}, pages={1-6} }

A 4-bit bit-slice arithmetic logic unit (ALU) for 32-bit rapid single-flux-quantum microprocessors was demonstrated. The proposed ALU covers all of the ALU operations for the MIPS32 instruction set. It processes bit-sliced 32-bit data that are divided into eight slices of 4 bits. The bit-slice approach simplifies the circuit structure and reduces the hardware cost. The ALU uses synchronous concurrent-flow clocking and consists of eight pipeline stages. It was implemented using the 1.0-μm Nb…

## 40 Citations

### Logic Design of a 16-bit Bit-Slice Arithmetic Logic Unit for 32-/64-bit RSFQ Microprocessors

- PhysicsIEEE Transactions on Applied Superconductivity
- 2018

A 16-bit bit-slice arithmetic logic unit (ALU) is proposed for 32-/64-bit rapid single-flux-quantum microprocessors based on a Ladner–Fischer adder, which can be used for any 16 n-bit processing.

### 32 × 32-Bit 4-Bit Bit-Slice Integer Multiplier for RSFQ Microprocessors

- PhysicsIEEE Transactions on Applied Superconductivity
- 2017

A design of a 32 × 32-bit 4-bit bit-slice integer multiplier for rapid single-flux quantum microprocessors is shown. The multiplier carries out both signed and unsigned multiplication. It is designed…

### Logic Design of a 16-bit Bit-Slice Shifter for 64-bit RSFQ Microprocessors

- Physics, Computer Science2019 IEEE International Superconductive Electronics Conference (ISEC)
- 2019

A logic-level simulation model based on the Open Dataset of CONNECT Cell Library for AIST ADP2 shows that the proposed 16-bit bit-slice shifter can work correctly and the information of RSFQ circuits can be obtained.

### ERSFQ 8-Bit Parallel Arithmetic Logic Unit

- PhysicsIEEE Transactions on Applied Superconductivity
- 2019

The 8-bit ERSFQ ALU design employs wave-pipelined instruction execution and features modular bit-slice architecture that is easily extendable to any number of bits and adaptable to current recycling.

### qBSA: Logic Design of a 32-bit Block-Skewed RSFQ Arithmetic Logic Unit

- Computer Science2019 IEEE International Superconductive Electronics Conference (ISEC)
- 2019

This paper proposes to increase the throughput of SFQ pipelines by redesigning the datapath to accept and operate on least-significant bits (LSBs) clock cycles earlier than more significant bits, and develops a block-skewed MIPS-compatible 32-bit ALU.

### An 8-bit Bit-Slice TEA-Cryptographic Accelerator for 64-bit RSFQ Secure Coprocessors

- Physics, Computer Science2019 IEEE International Superconductive Electronics Conference (ISEC)
- 2019

An 8-bit bit-slice TEA-cryptographic accelerator for 64-bit RSFQ secure coprocessors is proposed, based on Tiny Encryption Algorithm (TEA) and mainly consists of bit- slices adders and bit- slice shifters.

### 32-Bit ALU with Clockless Gates for RSFQ Bit-Parallel Processor

- PhysicsIEICE Trans. Electron.
- 2022

SUMMARY A 32-bit arithmetic logic unit (ALU) is designed for a rapid single ﬂux quantum (RSFQ) bit-parallel processor. In the ALU, clocked gates are partially replaced by clockless gates. This…

### Bit-Slice Butterfly Processing Units for 64-Point RSFQ FFT Processors

- PhysicsIEEE Transactions on Applied Superconductivity
- 2020

8-bit bit-slice butterfly processing units (BPUs) are proposed for 64-point rapid single-flux-quantum (RSFQ) fast Fourier transform processors based on radix-2, mixed-radix, and split-radIX algorithms, respectively.

### Design and implementation of bit-parallel RSFQ shift register memories

- Computer Science
- 2021

A shift register (SR) memory based on rapid single flux quantum (RSFQ) logic for bit-parallel access is proposed and shows higher bandwidth than bit-serial memory with the same capacity, especially for large capacity memory.

### High-Speed Operation of Random-Access-Memory-Embedded Microprocessor With Minimal Instruction Set Architecture Based on Rapid Single-Flux-Quantum Logic

- PhysicsIEEE Transactions on Applied Superconductivity
- 2017

We present design and experimental results of a rapid single-flux-quantum (RSFQ) bit-serial microprocessor with reduced-size embedded random access memories (RAMs) and with a minimal instruction set,…

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