JPS56135246A - Subroutine access control system - Google Patents

Subroutine access control system

Info

Publication number
JPS56135246A
JPS56135246A JP3797480A JP3797480A JPS56135246A JP S56135246 A JPS56135246 A JP S56135246A JP 3797480 A JP3797480 A JP 3797480A JP 3797480 A JP3797480 A JP 3797480A JP S56135246 A JPS56135246 A JP S56135246A
Authority
JP
Japan
Prior art keywords
return
subroutine
circuit
address
register
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
JP3797480A
Other languages
Japanese (ja)
Other versions
JPS645332B2 (en
Inventor
Masahiro Yamamoto
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 JP3797480A priority Critical patent/JPS56135246A/en
Publication of JPS56135246A publication Critical patent/JPS56135246A/en
Publication of JPS645332B2 publication Critical patent/JPS645332B2/ja
Granted 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
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/448—Execution paradigms, e.g. implementations of programming paradigms
    • G06F9/4482—Procedural
    • G06F9/4484—Executing subprograms
    • G06F9/4486—Formation of subprogram jump address

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Executing Machine-Instructions (AREA)

Abstract

PURPOSE:To return the control from a subroutine efficiently, by returning address information, set in a return address preserving circuit, to an address register by a sequence control circuit once an instruction is judged subroutine return one. CONSTITUTION:Microprogram memory 1 is stored with a microprogram of subroutine constitution, and from address register 2, microinstructions are outputted. Further, this system is provided with return address preserving circuit 5, arithmetic part 6 and sequence control circuit 7 which controls the execution of a train of microinstructions. Circuit 7, once detecting subroutine access instruction CALL of microinstruction register 4, sets return address part RA of register 4 in circuit 5 via signal line 71. Further, when subroutine return instruction RETURN is detected, the address information set in circuit 5 is set in register 2 via signal line 51. Thus, the memory capacity is reduced and the execution speed is increased.
JP3797480A 1980-03-25 1980-03-25 Subroutine access control system Granted JPS56135246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3797480A JPS56135246A (en) 1980-03-25 1980-03-25 Subroutine access control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3797480A JPS56135246A (en) 1980-03-25 1980-03-25 Subroutine access control system

Publications (2)

Publication Number Publication Date
JPS56135246A true JPS56135246A (en) 1981-10-22
JPS645332B2 JPS645332B2 (en) 1989-01-30

Family

ID=12512531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3797480A Granted JPS56135246A (en) 1980-03-25 1980-03-25 Subroutine access control system

Country Status (1)

Country Link
JP (1) JPS56135246A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01119138U (en) * 1988-02-08 1989-08-11

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023948A (en) * 1973-07-02 1975-03-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023948A (en) * 1973-07-02 1975-03-14

Also Published As

Publication number Publication date
JPS645332B2 (en) 1989-01-30

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