JPS5786954A - Software subroutine link system - Google Patents

Software subroutine link system

Info

Publication number
JPS5786954A
JPS5786954A JP55161937A JP16193780A JPS5786954A JP S5786954 A JPS5786954 A JP S5786954A JP 55161937 A JP55161937 A JP 55161937A JP 16193780 A JP16193780 A JP 16193780A JP S5786954 A JPS5786954 A JP S5786954A
Authority
JP
Japan
Prior art keywords
microprogram
software
value
flag
link
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
JP55161937A
Other languages
Japanese (ja)
Inventor
Hideyuki Hara
Yasushi Fukunaga
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 JP55161937A priority Critical patent/JPS5786954A/en
Publication of JPS5786954A publication Critical patent/JPS5786954A/en
Pending 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 utilize a software subroutine effectively from both a software program and a microprogram, by adding a flag for discriminating between a link from the software program and that from the microprogram to various pieces of stand-by information. CONSTITUTION:For a link from a software program to a software subroutine, the value of a program counter 16 is stored in an address indicated by the stack pointer 20 of a stack memory 21 through a selector 18. After the storage, the value of the stack point 20 goes up by one under the control of a control storage controller 19. Then, a flag F (=0) in a microinstruction register 11 is stored in the stack memory 21. For a link from a microprogram to the software subroutine, the value of a microprogram counter 13 is increased by one through an incrementer 17 and a flag F (=1) is set to store the resulting value in the stack memory 21.
JP55161937A 1980-11-19 1980-11-19 Software subroutine link system Pending JPS5786954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55161937A JPS5786954A (en) 1980-11-19 1980-11-19 Software subroutine link system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55161937A JPS5786954A (en) 1980-11-19 1980-11-19 Software subroutine link system

Publications (1)

Publication Number Publication Date
JPS5786954A true JPS5786954A (en) 1982-05-31

Family

ID=15744867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55161937A Pending JPS5786954A (en) 1980-11-19 1980-11-19 Software subroutine link system

Country Status (1)

Country Link
JP (1) JPS5786954A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63132337A (en) * 1986-11-22 1988-06-04 Sharp Corp Control system using stack area

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63132337A (en) * 1986-11-22 1988-06-04 Sharp Corp Control system using stack area

Similar Documents

Publication Publication Date Title
JPS5779557A (en) Data processor
JPS5786954A (en) Software subroutine link system
JPS5617441A (en) Program interruption system
JPS5785148A (en) Instruction sequence control device
JPS57101945A (en) Control system of information processor
JPS5528182A (en) Information processing unit
JPS5794849A (en) Microprogram controller
JPS5621258A (en) Failure storage system in central processing unit
JPS55115159A (en) Information processing unit
JPS55157064A (en) Word memory system
JPS5621251A (en) Retrial control system
JPS5614358A (en) Operation log storing system
JPS56152059A (en) Program debugging system
JPS56168265A (en) Branch location storage system of digital computer
JPS55116165A (en) Information processor
JPS57199055A (en) Information processing device
JPS5510659A (en) Data processor
JPS5561858A (en) Central operation control unit
JPS57191758A (en) System for storing test program in main storage
JPS54153542A (en) Data processor of microprogram control type
JPS5794851A (en) Instruction fetch control system
JPS56166556A (en) Controlling circuit
JPS575157A (en) Extension system for branch address of microinstruction
JPS55162156A (en) Data processor
JPS57100547A (en) Log-out control system