JPS5762442A - Information processor - Google Patents

Information processor

Info

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
Application number
JP13746180A
Other languages
Japanese (ja)
Other versions
JPS618452B2 (en
Inventor
Haruo Yano
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13746180A priority Critical patent/JPS5762442A/en
Publication of JPS5762442A publication Critical patent/JPS5762442A/en
Publication of JPS618452B2 publication Critical patent/JPS618452B2/ja
Granted legal-status Critical Current

Links

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, look ahead
    • G06F9/3802—Instruction prefetching
    • G06F9/3804—Instruction prefetching for branches, e.g. hedging, branch folding

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.
JP13746180A 1980-10-01 1980-10-01 Information processor Granted JPS5762442A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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