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[Keyword] data bypassing register file(1hit)

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  • Data Bypassing Register File for Low Power Microprocessor

    Makoto IKEDA  Kunihiro ASADA  

     
    LETTER-Integrated Electronics

      Vol:
    E78-C No:10
      Page(s):
    1470-1472

    In this paper, we propose a register file with data bypassing function. This register file bypasses data using data bypassing units instead of functional units when actual operation in functional units such as ALU is unnecessary. Applying this method to a general purpose microprocessor with benchmark programs, we demonstrate 50% power consumption reduction in functional units. Though length of bus lines increases a little due to an additional hardware in register file, as buses are not driven when data is bypassed, power consumption in bus lines is also reduced by 40% compared with the conventional architecture.