JPS5734254A - Information processing device - Google Patents

Information processing device

Info

Publication number
JPS5734254A
JPS5734254A JP10885280A JP10885280A JPS5734254A JP S5734254 A JPS5734254 A JP S5734254A JP 10885280 A JP10885280 A JP 10885280A JP 10885280 A JP10885280 A JP 10885280A JP S5734254 A JPS5734254 A JP S5734254A
Authority
JP
Japan
Prior art keywords
instruction
register
branch
address
fetching operation
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
JP10885280A
Other languages
Japanese (ja)
Other versions
JPS6047618B2 (en
Inventor
Tadao Kondo
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 JP10885280A priority Critical patent/JPS6047618B2/en
Publication of JPS5734254A publication Critical patent/JPS5734254A/en
Publication of JPS6047618B2 publication Critical patent/JPS6047618B2/en
Expired 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 process a branch instruction with a higher speed by quickening a fetching operation for a branch destination instruction word of a branch instruction in a pipe line controlling system in a large computer. CONSTITUTION:In a case when a load instruction is stored in an instruction register 3 and an unconditional instruction in a branch register 4, a controlling part 12 stores a virtual address computed from an address adder 6 in a virtual address register 8, and fetches an instruction word according to a value of the register 8 against a cash memory 9 and stores in an instruction buffer 1. Since in this register 7 an operand address has been computed according to an instruction of the register 3, if an unconditional branch instruction is detected in the register 4, then a branch prefetching operation is preferred, thereby allowing an operand fetching operation to be done after a branch destination instruction word fetching operation.
JP10885280A 1980-08-08 1980-08-08 information processing equipment Expired JPS6047618B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10885280A JPS6047618B2 (en) 1980-08-08 1980-08-08 information processing equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10885280A JPS6047618B2 (en) 1980-08-08 1980-08-08 information processing equipment

Publications (2)

Publication Number Publication Date
JPS5734254A true JPS5734254A (en) 1982-02-24
JPS6047618B2 JPS6047618B2 (en) 1985-10-22

Family

ID=14495222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10885280A Expired JPS6047618B2 (en) 1980-08-08 1980-08-08 information processing equipment

Country Status (1)

Country Link
JP (1) JPS6047618B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160239A (en) * 1983-03-02 1984-09-10 Hitachi Ltd Information processing device
JPH0512010A (en) * 1991-07-04 1993-01-22 Nec Corp Branch forecast system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160239A (en) * 1983-03-02 1984-09-10 Hitachi Ltd Information processing device
JPH0218732B2 (en) * 1983-03-02 1990-04-26 Hitachi Ltd
JPH0512010A (en) * 1991-07-04 1993-01-22 Nec Corp Branch forecast system

Also Published As

Publication number Publication date
JPS6047618B2 (en) 1985-10-22

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