JPS5762442A - Information processor - Google Patents
Information processorInfo
- Publication number
- JPS5762442A JPS5762442A JP13746180A JP13746180A JPS5762442A JP S5762442 A JPS5762442 A JP S5762442A JP 13746180 A JP13746180 A JP 13746180A JP 13746180 A JP13746180 A JP 13746180A JP S5762442 A JPS5762442 A JP S5762442A
- Authority
- JP
- Japan
- Prior art keywords
- instruction
- address
- branch
- register
- adder
- 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.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
- G06F9/38—Concurrent instruction execution, e.g. pipeline or look ahead
- G06F9/3802—Instruction prefetching
- G06F9/3804—Instruction prefetching for branches, e.g. hedging, branch folding
Landscapes
- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Advance Control (AREA)
Abstract
PURPOSE:To obtain a device which performs instruction prefetching processing and branch-instruction processing smoothly and has hardware reduced, by generating the logical address of a storage device by discriminating between inputs to an address adder when a branch instruction is executed and when not. CONSTITUTION:A detecting circuit 118 checks whether the instruction code part 119 of a following instruction stored in the 2nd instruction register 103 shows a branch instruction or not. When instruction prefetching is indicated, switching circuits 123-125 receive and output the contents of an instruction base address register 114, those of an instruction relative address register 115 and the number of instruction readout word length to an address adder 116, thereby generating the logical address of the prefetch instruction. In case of a branch instruction, a base register number part 120, the contents of the register specified by an index register number part, and displacement 122 are outputted to the address adder to generate the branch address of the branch instruction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13746180A JPS5762442A (en) | 1980-10-01 | 1980-10-01 | Information processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13746180A JPS5762442A (en) | 1980-10-01 | 1980-10-01 | Information processor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5762442A true JPS5762442A (en) | 1982-04-15 |
JPS618452B2 JPS618452B2 (en) | 1986-03-14 |
Family
ID=15199142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13746180A Granted JPS5762442A (en) | 1980-10-01 | 1980-10-01 | Information processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5762442A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6355639A (en) * | 1986-08-26 | 1988-03-10 | Mitsubishi Electric Corp | Data processor |
JPS6359630A (en) * | 1986-08-29 | 1988-03-15 | Mitsubishi Electric Corp | Data processor |
-
1980
- 1980-10-01 JP JP13746180A patent/JPS5762442A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6355639A (en) * | 1986-08-26 | 1988-03-10 | Mitsubishi Electric Corp | Data processor |
JPS6359630A (en) * | 1986-08-29 | 1988-03-15 | Mitsubishi Electric Corp | Data processor |
Also Published As
Publication number | Publication date |
---|---|
JPS618452B2 (en) | 1986-03-14 |
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