JPS6240538A - Data processor - Google Patents

Data processor

Info

Publication number
JPS6240538A
JPS6240538A JP17976185A JP17976185A JPS6240538A JP S6240538 A JPS6240538 A JP S6240538A JP 17976185 A JP17976185 A JP 17976185A JP 17976185 A JP17976185 A JP 17976185A JP S6240538 A JPS6240538 A JP S6240538A
Authority
JP
Japan
Prior art keywords
instruction
address
sent
control part
decoding control
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
JP17976185A
Inventor
Hideo Kawai
Hisazumi Ueda
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP17976185A priority Critical patent/JPS6240538A/en
Publication of JPS6240538A publication Critical patent/JPS6240538A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To decode and execute a program consisting of an instruction having each different instruction format in equal level by switching to an instruction decoder corresponding to an instruction format of a machine instruction, based on an address of said machine instruction.
CONSTITUTION: If an instruction to be executed belongs to the first instruction set, the uppermost bit of an address on a main storage device 6 is placed in a range 40 of '0', and the corresponding instruction is fetched and sent to an instruction buffer 17. Also, the upper most bit of the address of the instruction is sent to an instruction decoding control part 50 in an interpreter 49, and the instruction which has been inputted to the instruction decoding control part 50 from the instruction buffer 17 is sent to the first instruction decoder 27 and decoded. Next, if the instruction to be executed belongs to the second instruction set, the uppermost bit of the address on the main storage device 6 is placed in a range 41 of '1', and the instruction which has been inputted to the instruction decoding control part 50 is sent to the second instruction decoder 32 and decoded.
COPYRIGHT: (C)1987,JPO&Japio
JP17976185A 1985-08-15 1985-08-15 Data processor Pending JPS6240538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17976185A JPS6240538A (en) 1985-08-15 1985-08-15 Data processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17976185A JPS6240538A (en) 1985-08-15 1985-08-15 Data processor

Publications (1)

Publication Number Publication Date
JPS6240538A true JPS6240538A (en) 1987-02-21

Family

ID=16071420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17976185A Pending JPS6240538A (en) 1985-08-15 1985-08-15 Data processor

Country Status (1)

Country Link
JP (1) JPS6240538A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2374694A (en) * 2001-02-26 2002-10-23 Advanced Risc Mach Ltd Storing instruction set information
US7020768B2 (en) 2001-02-01 2006-03-28 Arm Limited Apparatus and method for facilitating debugging of sequences of processing instructions using context identifier comparison
GB2435116A (en) * 2006-02-10 2007-08-15 Imagination Tech Ltd Determining an instructions set based on the instruction address
JP2015222033A (en) * 2014-05-22 2015-12-10 三菱自動車工業株式会社 Internal combustion engine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7020768B2 (en) 2001-02-01 2006-03-28 Arm Limited Apparatus and method for facilitating debugging of sequences of processing instructions using context identifier comparison
US7093236B2 (en) 2001-02-01 2006-08-15 Arm Limited Tracing out-of-order data
US7093108B2 (en) 2001-02-01 2006-08-15 Arm Limited Apparatus and method for efficiently incorporating instruction set information with instruction addresses
GB2374694A (en) * 2001-02-26 2002-10-23 Advanced Risc Mach Ltd Storing instruction set information
GB2374694B (en) * 2001-02-26 2005-04-27 Advanced Risc Mach Ltd Apparatus and method for storing instruction set information
GB2435116A (en) * 2006-02-10 2007-08-15 Imagination Tech Ltd Determining an instructions set based on the instruction address
GB2435116B (en) * 2006-02-10 2010-04-07 Imagination Tech Ltd Selecting between instruction sets in a microprocessors
JP2015222033A (en) * 2014-05-22 2015-12-10 三菱自動車工業株式会社 Internal combustion engine

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