JPS6286442A - Data processor - Google Patents

Data processor

Info

Publication number
JPS6286442A
JPS6286442A JP60226775A JP22677585A JPS6286442A JP S6286442 A JPS6286442 A JP S6286442A JP 60226775 A JP60226775 A JP 60226775A JP 22677585 A JP22677585 A JP 22677585A JP S6286442 A JPS6286442 A JP S6286442A
Authority
JP
Japan
Prior art keywords
bit
trace
order
jump
memory
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
JP60226775A
Other languages
Japanese (ja)
Inventor
Mamoru Sueoka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP60226775A priority Critical patent/JPS6286442A/en
Publication of JPS6286442A publication Critical patent/JPS6286442A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To minimize a hardware by recording the low-order 16-bit of an instruction head address just after branching to a trace memory and storing the high/low order 16-bit of the address of the instruction head into the trace memory in case of a 32-bit branch instruction.
CONSTITUTION: A PC tracer consists of a jump flag 71, a 32-bit jump flag 72, a trace address counter 73, a memory 74, a 32-bit register 174 storing the content of a program counter, a selector 175 selecting whether low-order 16-bit or high- order 16-bit and a bit 176 reflecting a 32-bit jump flag 72. The level of the 32-bit jump flag reflection bit 176 is 0 at 16-bit jump and 1 at 32-bit jump. Since the storage capacity of a trace memory is decreased without losing effective trace information, the program counter trace device capable of wide range trace is formed without increasing the hardware.
COPYRIGHT: (C)1987,JPO&Japio
JP60226775A 1985-10-14 1985-10-14 Data processor Pending JPS6286442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60226775A JPS6286442A (en) 1985-10-14 1985-10-14 Data processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60226775A JPS6286442A (en) 1985-10-14 1985-10-14 Data processor

Publications (1)

Publication Number Publication Date
JPS6286442A true JPS6286442A (en) 1987-04-20

Family

ID=16850415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60226775A Pending JPS6286442A (en) 1985-10-14 1985-10-14 Data processor

Country Status (1)

Country Link
JP (1) JPS6286442A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02146650A (en) * 1988-11-29 1990-06-05 Yokogawa Electric Corp Bus analyzer
US6594782B1 (en) 1998-12-28 2003-07-15 Fujitsu Limited Information processing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02146650A (en) * 1988-11-29 1990-06-05 Yokogawa Electric Corp Bus analyzer
US6594782B1 (en) 1998-12-28 2003-07-15 Fujitsu Limited Information processing apparatus

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