JPS54146937A - Data prefetch control system - Google Patents
Data prefetch control systemInfo
- 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
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
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)
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)
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 |
-
1978
- 1978-05-10 JP JP5534178A patent/JPS54146937A/en active Pending
Patent Citations (3)
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)
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 |