JPS5783851A - Condition code generating system - Google Patents

Condition code generating system

Info

Publication number
JPS5783851A
JPS5783851A JP55159501A JP15950180A JPS5783851A JP S5783851 A JPS5783851 A JP S5783851A JP 55159501 A JP55159501 A JP 55159501A JP 15950180 A JP15950180 A JP 15950180A JP S5783851 A JPS5783851 A JP S5783851A
Authority
JP
Japan
Prior art keywords
condition code
instruction
information
hardware
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
JP55159501A
Other languages
Japanese (ja)
Inventor
Akira Ishiyama
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 JP55159501A priority Critical patent/JPS5783851A/en
Publication of JPS5783851A publication Critical patent/JPS5783851A/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
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30094—Condition code generation, e.g. Carry, Zero flag

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 reduce the quantity of hardware and simplify a program and facilitate the error detection, by reading a condition code on a basis of information related to the execution result of an instruction and information designating a condition code set type in an information processing device. CONSTITUTION:Condition code set type information corresponding to an instruction is read out from a memory 3 by using the instruction code or a part of it as an address input, and an address of a memory 5 is designated by this information and contents of a state holding register 11 to read out a condition code from the memory 5. Consequently, it is unnecessary that the microprogram for instruction execution recognizes the condition code set type to start selectively a hardware only for this type, and thus, the microprogram is simplified. Further, the design is facilitated, and the quantity of hardware is reduced, and the detection of erroneous operations is facilitated.
JP55159501A 1980-11-14 1980-11-14 Condition code generating system Pending JPS5783851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55159501A JPS5783851A (en) 1980-11-14 1980-11-14 Condition code generating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55159501A JPS5783851A (en) 1980-11-14 1980-11-14 Condition code generating system

Publications (1)

Publication Number Publication Date
JPS5783851A true JPS5783851A (en) 1982-05-25

Family

ID=15695141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55159501A Pending JPS5783851A (en) 1980-11-14 1980-11-14 Condition code generating system

Country Status (1)

Country Link
JP (1) JPS5783851A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455336A (en) * 1977-10-12 1979-05-02 Nec Corp Data processor controlled by microprogram

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455336A (en) * 1977-10-12 1979-05-02 Nec Corp Data processor controlled by microprogram

Similar Documents

Publication Publication Date Title
JPS5783851A (en) Condition code generating system
JPS5731049A (en) Information processing equipment
JPS57130150A (en) Register control system
JPS5719869A (en) Input information processor
JPS57164343A (en) Check point save system
JPS57105038A (en) Operand processing method of ss-type instruction
JPS5779555A (en) Advanced control system for instruction
JPS56147246A (en) Program control device
JPS57109055A (en) Readout control system for microinstruction
JPS57101945A (en) Control system of information processor
JPS5785148A (en) Instruction sequence control device
JPS5696336A (en) Processing system for multilayer level microprogram
JPS57164341A (en) Program controller
JPS57100542A (en) Information processor of microprogram control system
JPS5764400A (en) Error correction system of storage contents
JPS5739454A (en) Program development device
JPS57191759A (en) Microprogram tracing system
JPS5537625A (en) Data storing read system
JPS56162151A (en) Information processing device
JPS5720996A (en) Memory diagnostic control system
JPS57111740A (en) Updating control system of program content
JPS57132255A (en) Program tracing system
JPS57197653A (en) Control device of microprogram
JPS54111229A (en) Input control system
JPS57105036A (en) Register means access system