Abstract:
A data processing unit, a data processing system, a co-processor connecting method, and a co-processor interfacing method are provided to improve the process speed and supporting a connection of multiple co-processor using small number of signal lines. A main processor(411) transmits a first coprocessor interface signal combination, transmits a coprocessor command by receiving a second coprocessor interface signal, and continues the pipeline without waiting the result of coprocessor command. A plurality of coprocessors(412,413) are operated by the coprocessor command. A data processing unit includes a coprocessor bus(420) connecting main processors, and coprocessors for inputting the first coprocessor interface signal group, or the second coprocessor interface signal group to each coprocessors through the same signal line by the interface signals.
Abstract:
명령어를 지연시켜 수행하는 방법은 현재 명령어가 이전 명령어와 의존성이 있는지 판단하는 단계, 현재 명령어가 이전 명령어와 의존성이 있는 경우, 현재 명령어의 N번째 비트에 제1 값을 설정하는 단계, 디코딩 단계에서 현재 명령어의 N번째 비트 값을 판단하는 단계 및 현재 명령어의 N번째 비트 값이 제1 값으로 판단된 경우, N번째 비트 값을 제1 값과 반전된 제2 값으로 변경한 후, 디코딩 단계를 한 사이클 더 수행하여 실행 단계, 메모리 접속 단계 및 기입 단계를 한 사이클씩 지연시키는 단계를 포함한다. 따라서 각 명령어의 지연 여부를 결정하는 한 비트를 이용하여 무연산(NOP: No Operation) 명령어의 요구 없이 의존성이 있는 복수의 명령어들을 정상적으로 처리할 수 있고, 이에 따라 프로그램의 크기를 감소시킬 수 있다. 명령어, 무연산, 프로세서, 지연
Abstract:
PURPOSE: An execution method of instruction after delaying and an execution system for the same are provided to execute one more decoding stage of a current instruction when the current instruction is dependent to previous instructions. CONSTITUTION: A programming unit(615) determined whether a current instruction is dependent on previous instruction. If the current instruction is dependent on the previous instruction, the programming unit sets a first value to Nth bit of the current instruction. A processor(635) determines the Nth bit value of the current instruction. If the Nth bit value of the current instruction is determined to the first value, the processor executes one more decoding state of the current instruction.
Abstract:
Butanol or ethanol is prepd. by culturing clostridium acetobutylicum KFCC1037 (I) in the medium contg. residual product contg. lactic acid (corn steep liquor) or residual product from palm oil production as a nitrogen source. The production rate is increased by mixed culturing (I) and lactic acid bacteria, e.g. Lactobacillus plantarum KCTC3102 or Leuconostoc mesenteroides KCTC3100. Butanol production in the butanol ethanol fermentation is increased by adding lactic acid, corn steep liquor etc.