JPS6491237A - Control system for branch history table - Google Patents

Control system for branch history table

Info

Publication number
JPS6491237A
JPS6491237A JP24580287A JP24580287A JPS6491237A JP S6491237 A JPS6491237 A JP S6491237A JP 24580287 A JP24580287 A JP 24580287A JP 24580287 A JP24580287 A JP 24580287A JP S6491237 A JPS6491237 A JP S6491237A
Authority
JP
Japan
Prior art keywords
branching
register
addresses
instruction
taa4
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
Application number
JP24580287A
Other languages
Japanese (ja)
Inventor
Takeshi Morisada
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
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 filed Critical NEC Corp
Priority to JP24580287A priority Critical patent/JPS6491237A/en
Publication of JPS6491237A publication Critical patent/JPS6491237A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent the misbranching and also to increase the processing speed by estimating the branching destination addresses when the same branching destination address are set by several times in terms of a branching instruction for register qualification. CONSTITUTION:In a writing state the information are received by a branching instruction address register IAR1, a branching destination address register 2 and a register qualifying register 3 respectively. Then some of the addresses sent from the IAR1 are read out as the addresses of branch history table TAA4 and TAB5. When th coincidence of branching destinations is secured by comparators 7 and 8, 0 is written into a table TAC6. Then some of the instruction prefetching addresses sent to the IAR1 in a reading state are used to read the tables TAA4, TAB5 and TAC6. In this case the comparator 7 compares the estimated branching instruction address information given from the TAA4 with the instruction address information given from IR1. Then the information showing that a branching destination can be estimated is sent to a line 117 BETAhen the coincidence is obtained between both address information via the comparator 7 and at the same time the TAC6 is set at 0.
JP24580287A 1987-10-01 1987-10-01 Control system for branch history table Pending JPS6491237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24580287A JPS6491237A (en) 1987-10-01 1987-10-01 Control system for branch history table

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24580287A JPS6491237A (en) 1987-10-01 1987-10-01 Control system for branch history table

Publications (1)

Publication Number Publication Date
JPS6491237A true JPS6491237A (en) 1989-04-10

Family

ID=17139057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24580287A Pending JPS6491237A (en) 1987-10-01 1987-10-01 Control system for branch history table

Country Status (1)

Country Link
JP (1) JPS6491237A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130475A (en) * 1987-06-08 1992-07-14 Kureha Kagaku Kogyo Kabushiki Kaisha Derivative of 1,5-diphenyl-1h-1,2,4-triazole-3-carboxamide, herbicidal compositions containing the derivative and process for producing the derivative

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130475A (en) * 1987-06-08 1992-07-14 Kureha Kagaku Kogyo Kabushiki Kaisha Derivative of 1,5-diphenyl-1h-1,2,4-triazole-3-carboxamide, herbicidal compositions containing the derivative and process for producing the derivative

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