JPS6418841A - Information processor for prefetching instruction - Google Patents
Information processor for prefetching instructionInfo
- Publication number
- JPS6418841A JPS6418841A JP17636087A JP17636087A JPS6418841A JP S6418841 A JPS6418841 A JP S6418841A JP 17636087 A JP17636087 A JP 17636087A JP 17636087 A JP17636087 A JP 17636087A JP S6418841 A JPS6418841 A JP S6418841A
- Authority
- JP
- Japan
- Prior art keywords
- instruction
- register
- address
- branch
- branching
- 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
Landscapes
- Advance Control (AREA)
Abstract
PURPOSE:To avoid a case where the undesired instructions are taken out by performing the control so that a designated branch instruction receiver address is not registered into a branch history table by the prescribe address qualification. CONSTITUTION:The instruction words, the instruction addresses and the branching destination addresses are set to an instruction register 1, an instruction address register 5 and a branching destination address register 6 respectively from an advance control unit 8 via signal lines 105, 106 and 107 before a branch instruction is carried out. Then a branch deciding circuit 2 connected to the register 1 decides the presence or absence of branching. When the presence of branching is decided, the contents of both registers 5 and 6 are registered into a branch history table 7. At the same time, an address qualification detecting circuit 3 decodes the instruction words of the register 1 and disables the output of a gate 4 when the address qualification is detected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17636087A JPH0715662B2 (en) | 1987-07-14 | 1987-07-14 | Information processing device for prefetching instructions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17636087A JPH0715662B2 (en) | 1987-07-14 | 1987-07-14 | Information processing device for prefetching instructions |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6418841A true JPS6418841A (en) | 1989-01-23 |
JPH0715662B2 JPH0715662B2 (en) | 1995-02-22 |
Family
ID=16012253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17636087A Expired - Fee Related JPH0715662B2 (en) | 1987-07-14 | 1987-07-14 | Information processing device for prefetching instructions |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0715662B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02260033A (en) * | 1989-02-03 | 1990-10-22 | Digital Equip Corp <Dec> | Branch forecast |
JP2008532142A (en) * | 2005-02-24 | 2008-08-14 | クゥアルコム・インコーポレイテッド | Suppressing the update of the branch history register by a loop closing branch |
-
1987
- 1987-07-14 JP JP17636087A patent/JPH0715662B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02260033A (en) * | 1989-02-03 | 1990-10-22 | Digital Equip Corp <Dec> | Branch forecast |
JP2008532142A (en) * | 2005-02-24 | 2008-08-14 | クゥアルコム・インコーポレイテッド | Suppressing the update of the branch history register by a loop closing branch |
JP2011100466A (en) * | 2005-02-24 | 2011-05-19 | Qualcomm Inc | Suppressing update of branch history register by loop-ending branch |
Also Published As
Publication number | Publication date |
---|---|
JPH0715662B2 (en) | 1995-02-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |