JPS5717059A - Processor for pipeline control data - Google Patents

Processor for pipeline control data

Info

Publication number
JPS5717059A
JPS5717059A JP9060880A JP9060880A JPS5717059A JP S5717059 A JPS5717059 A JP S5717059A JP 9060880 A JP9060880 A JP 9060880A JP 9060880 A JP9060880 A JP 9060880A JP S5717059 A JPS5717059 A JP S5717059A
Authority
JP
Japan
Prior art keywords
operand
decoding
instruction
cycle
processor
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
JP9060880A
Other languages
Japanese (ja)
Inventor
Hidekazu Matsumoto
Tadaaki Bando
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 JP9060880A priority Critical patent/JPS5717059A/en
Publication of JPS5717059A publication Critical patent/JPS5717059A/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
    • G06F9/38—Concurrent instruction execution, e.g. pipeline or look ahead
    • G06F9/3867—Concurrent instruction execution, e.g. pipeline or look ahead using instruction pipelines
    • G06F9/3875—Pipelining a single stage, e.g. superpipelining

Landscapes

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

Abstract

PURPOSE:To accelerate the decoding of an instruction and thus enhance the performance of a processor, by simultaneously decoding the final operand with the decoding cycle of the operand preceding by one when the final operand of an instruction is given in a register direct mode. CONSTITUTION:In the case of the two operand addition instructions, the 1st and 2nd operands are read out of a ROM405. In this case, it is supposed that the 2nd operand is given in either one of figures (a)-(d) and in a register direct mode. Thus the 1st operand is positioned before the final operand in the first decoding cycle to satisfy BENDR=1. Accordingly the output of a decoder 409 is ''1'' to give a control to a selector 403 or the like. Then the next decoding cycle is not defined as the decoding cycle of the 2nd operand, and the next instruction is decoded. In such way, the decoding of an addition instruction can be finished in a cycle.
JP9060880A 1980-07-04 1980-07-04 Processor for pipeline control data Pending JPS5717059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9060880A JPS5717059A (en) 1980-07-04 1980-07-04 Processor for pipeline control data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9060880A JPS5717059A (en) 1980-07-04 1980-07-04 Processor for pipeline control data

Publications (1)

Publication Number Publication Date
JPS5717059A true JPS5717059A (en) 1982-01-28

Family

ID=14003184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9060880A Pending JPS5717059A (en) 1980-07-04 1980-07-04 Processor for pipeline control data

Country Status (1)

Country Link
JP (1) JPS5717059A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219421A (en) * 1983-05-26 1984-12-10 Kawasaki Steel Corp Operating method of sintering machine
JPH01237837A (en) * 1988-03-18 1989-09-22 Mitsubishi Electric Corp Data processor
JPH02105937A (en) * 1988-10-14 1990-04-18 Mitsubishi Electric Corp Data processor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219421A (en) * 1983-05-26 1984-12-10 Kawasaki Steel Corp Operating method of sintering machine
JPS6248735B2 (en) * 1983-05-26 1987-10-15 Kawasaki Steel Co
JPH01237837A (en) * 1988-03-18 1989-09-22 Mitsubishi Electric Corp Data processor
JPH02105937A (en) * 1988-10-14 1990-04-18 Mitsubishi Electric Corp Data processor

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