JPS54146937A - Data prefetch control system - Google Patents

Data prefetch control system

Info

Publication number
JPS54146937A
JPS54146937A JP5534178A JP5534178A JPS54146937A JP S54146937 A JPS54146937 A JP S54146937A JP 5534178 A JP5534178 A JP 5534178A JP 5534178 A JP5534178 A JP 5534178A JP S54146937 A JPS54146937 A JP S54146937A
Authority
JP
Japan
Prior art keywords
prefetch
instruction
memory
buffer
next block
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
JP5534178A
Other languages
Japanese (ja)
Inventor
Masayuki Okawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5534178A priority Critical patent/JPS54146937A/en
Publication of JPS54146937A publication Critical patent/JPS54146937A/en
Pending legal-status Critical Current

Links

Landscapes

  • Advance Control (AREA)

Abstract

PURPOSE: To improve the bit rate of a buffer memory by inspecting the format of an instruction fetched into an instruction buffer and deciding whether the next block should be prefetched into the buffer memory or not according to the format of the instruction.
CONSTITUTION: An instruction in instruction buffer 1 is inspected by decoder 2 and prefetch permission detection part 5; and in case of a prefetch permission instruction, prefetch permission signal generation part 8 is operated to send a prefetch request signal to memory access control circuit 7. Meanwhile, the prefetch permission signal is sent to adder 10 to calculate the address of the next block, and the result is set to prefetch address register 11. The prefetch request is processed by utilizing the idle cycle of the memory request; and if no prefetch block exists in buffer memory 13, the next block is transferred from main memory 12.
COPYRIGHT: (C)1979,JPO&Japio
JP5534178A 1978-05-10 1978-05-10 Data prefetch control system Pending JPS54146937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5534178A JPS54146937A (en) 1978-05-10 1978-05-10 Data prefetch control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5534178A JPS54146937A (en) 1978-05-10 1978-05-10 Data prefetch control system

Publications (1)

Publication Number Publication Date
JPS54146937A true JPS54146937A (en) 1979-11-16

Family

ID=12995800

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5534178A Pending JPS54146937A (en) 1978-05-10 1978-05-10 Data prefetch control system

Country Status (1)

Country Link
JP (1) JPS54146937A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118840A (en) * 1984-11-15 1986-06-06 Nec Corp Control system of electronic computer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5096143A (en) * 1973-12-24 1975-07-31
JPS51111026A (en) * 1975-03-26 1976-10-01 Hitachi Ltd Information management equipment
JPS5293243A (en) * 1976-01-31 1977-08-05 Nec Corp Data processing unit performing preceding control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5096143A (en) * 1973-12-24 1975-07-31
JPS51111026A (en) * 1975-03-26 1976-10-01 Hitachi Ltd Information management equipment
JPS5293243A (en) * 1976-01-31 1977-08-05 Nec Corp Data processing unit performing preceding control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118840A (en) * 1984-11-15 1986-06-06 Nec Corp Control system of electronic computer

Similar Documents

Publication Publication Date Title
JPS5687282A (en) Data processor
JPS56149646A (en) Operation controller
JPS56123041A (en) Information processor
JPS57196357A (en) Data processor
JPS57185545A (en) Information processor
JPS54146937A (en) Data prefetch control system
JPS5475964A (en) Data pre-fetch system
JPS5654558A (en) Write control system for main memory unit
JPS54100635A (en) Information processor
JPS54107647A (en) Data processor
JPS559228A (en) Memory request control system
JPS55119750A (en) Processor providing test address function
JPS54109332A (en) Access-exception detection system of data processor
JPS5388545A (en) Processing system for vector order
JPS5587362A (en) Buffer memory control system
JPS5544662A (en) Input/output program control unit
JPS57199052A (en) Data processing device
JPS5621245A (en) Detection system of address coincidence system
JPS5593580A (en) Buffer memory control system
JPS5510659A (en) Data processor
JPS5518718A (en) Interruption system for specific program
JPS5697146A (en) Instruction fetch control system
JPS522142A (en) Interruption preference deciding system
JPS5621241A (en) Pipeline control method for computer operation
JPS53134334A (en) Prefetch system in information processor having buffer memory