JPS54113226A - Data processing unit - Google Patents

Data processing unit

Info

Publication number
JPS54113226A
JPS54113226A JP14177777A JP14177777A JPS54113226A JP S54113226 A JPS54113226 A JP S54113226A JP 14177777 A JP14177777 A JP 14177777A JP 14177777 A JP14177777 A JP 14177777A JP S54113226 A JPS54113226 A JP S54113226A
Authority
JP
Japan
Prior art keywords
word
instruction
data
fetched
instruction word
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14177777A
Other languages
Japanese (ja)
Inventor
Yoichi Umemura
Hisao Nakajo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
NEC Corp
Original Assignee
Toshiba Corp
NEC Corp
Tokyo Shibaura Electric Co Ltd
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, NEC Corp, Tokyo Shibaura Electric Co Ltd, Nippon Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14177777A priority Critical patent/JPS54113226A/en
Publication of JPS54113226A publication Critical patent/JPS54113226A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To improve the buffering efficiency on the data processing unit by control ling the data processing unit to use a part of an instruction buffer as a data buffer when specific instructions are executed.
CONSTITUTION: In the data processing unit where the precedence control is performed, main memory means 10 which stores the data word and the instruction word and buffer means 30 which stores the instruction word and data word fetched precedently are provided. Further, look ahead control means 40 which controls whether only the instruction word or both the instruction word and the data word are fetched prcedently from means 10 to means 30 or not according to contents of the instruction word is provided. Furthermore, execution means 50 which reads the instruction word and the data word which are fetched precedently into means 30 and performs a specified operation is provided. By this constitution, according to the contents of the instruction fetched precedently, the instruction word or the instruction word and the data word are controlled to be fetched into means 30 from means 10. As a result, it is possible to improve the usage efficiency of the buffer.
COPYRIGHT: (C)1979,JPO&Japio
JP14177777A 1977-11-26 1977-11-26 Data processing unit Pending JPS54113226A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14177777A JPS54113226A (en) 1977-11-26 1977-11-26 Data processing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14177777A JPS54113226A (en) 1977-11-26 1977-11-26 Data processing unit

Publications (1)

Publication Number Publication Date
JPS54113226A true JPS54113226A (en) 1979-09-04

Family

ID=15299917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14177777A Pending JPS54113226A (en) 1977-11-26 1977-11-26 Data processing unit

Country Status (1)

Country Link
JP (1) JPS54113226A (en)

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