JPS5640954A - Data processing system - Google Patents
Data processing systemInfo
- Publication number
- JPS5640954A JPS5640954A JP11607579A JP11607579A JPS5640954A JP S5640954 A JPS5640954 A JP S5640954A JP 11607579 A JP11607579 A JP 11607579A JP 11607579 A JP11607579 A JP 11607579A JP S5640954 A JPS5640954 A JP S5640954A
- Authority
- JP
- Japan
- Prior art keywords
- instruction
- branching
- branch
- fetch
- address
- 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)
- Executing Machine-Instructions (AREA)
Abstract
PURPOSE: To increase the processing speed of the branch instruction, by carrying out the pre-fetch of the instruction in the branching destinating in parallel before completion of the process for the branch order in case the address of the branching destination can be calculated after setting up the branching conditions.
CONSTITUTION: In the branch instruction process routine 4, the instruction register is decoded by the decoder. And the branch instruction is processed at the STATC in the instruction preparatory routine 4 after the process is finished for the instruction under execution at present and in case the next instruction is a branch instruction. At the STATC, a calculation is carried out for the operand address (branching destination instruction address), and then a test is given to decide whether the branching is set up or not. And in case the branching is set up, the branching destination instruction address register is set. And a pre-fetch of the instruction is carried out by the instruction pre-fetch control circuit. With completion of the pre- fetch of the instruction, the branch instruction process completes.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11607579A JPS5640954A (en) | 1979-09-12 | 1979-09-12 | Data processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11607579A JPS5640954A (en) | 1979-09-12 | 1979-09-12 | Data processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5640954A true JPS5640954A (en) | 1981-04-17 |
Family
ID=14678083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11607579A Pending JPS5640954A (en) | 1979-09-12 | 1979-09-12 | Data processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5640954A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6282402A (en) * | 1985-10-07 | 1987-04-15 | Toshiba Corp | Sequence controller |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5039437A (en) * | 1973-08-10 | 1975-04-11 | ||
JPS51138355A (en) * | 1975-05-26 | 1976-11-29 | Hitachi Ltd | Processing apparatus with a high speed branching feature |
JPS522140A (en) * | 1975-06-24 | 1977-01-08 | Hitachi Ltd | Information processing apparatus |
-
1979
- 1979-09-12 JP JP11607579A patent/JPS5640954A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5039437A (en) * | 1973-08-10 | 1975-04-11 | ||
JPS51138355A (en) * | 1975-05-26 | 1976-11-29 | Hitachi Ltd | Processing apparatus with a high speed branching feature |
JPS522140A (en) * | 1975-06-24 | 1977-01-08 | Hitachi Ltd | Information processing apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6282402A (en) * | 1985-10-07 | 1987-04-15 | Toshiba Corp | Sequence controller |
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