JPS5786953A - Operand address discriminator - Google Patents

Operand address discriminator

Info

Publication number
JPS5786953A
JPS5786953A JP16358280A JP16358280A JPS5786953A JP S5786953 A JPS5786953 A JP S5786953A JP 16358280 A JP16358280 A JP 16358280A JP 16358280 A JP16358280 A JP 16358280A JP S5786953 A JPS5786953 A JP S5786953A
Authority
JP
Japan
Prior art keywords
operand
length
byte
circuits
difference value
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
JP16358280A
Other languages
Japanese (ja)
Other versions
JPS6133215B2 (en
Inventor
Minoru Nishisaka
Suketaka Ishikawa
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 JP16358280A priority Critical patent/JPS5786953A/en
Publication of JPS5786953A publication Critical patent/JPS5786953A/en
Publication of JPS6133215B2 publication Critical patent/JPS6133215B2/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
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30003—Arrangements for executing specific machine instructions
    • G06F9/30007—Arrangements for executing specific machine instructions to perform operations on data operands
    • G06F9/30018—Bit or string instructions

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 speed discrimination timing by decreasing the number of operators by discriminating a difference value between both operand addresses found by the operators and by comparing it with the result of the descrimination of operand-length discriminating circuits. CONSTITUTION:An operator 3 finds a difference value between the operand addresses OA1 and OA2 of the 1st and 2nd registers 1 and 2, and difference discriminating circuits 4 and 5 discriminate a <=16-byte, a <=8-byte, and a <=4- byte difference value. In an operand-length register 7, specified operand length data is set and operand-length discriminating circuits 8 and 9 discriminate <=8- byte operand length and <=4-byte operand length to inform two-input AND circuits 10 and 11 of them. The circuits 10 and 11 and a three-input AND circuit 12 discriminate whether the operand length is less than the difference value between both the addresses.
JP16358280A 1980-11-20 1980-11-20 Operand address discriminator Granted JPS5786953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16358280A JPS5786953A (en) 1980-11-20 1980-11-20 Operand address discriminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16358280A JPS5786953A (en) 1980-11-20 1980-11-20 Operand address discriminator

Publications (2)

Publication Number Publication Date
JPS5786953A true JPS5786953A (en) 1982-05-31
JPS6133215B2 JPS6133215B2 (en) 1986-08-01

Family

ID=15776643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16358280A Granted JPS5786953A (en) 1980-11-20 1980-11-20 Operand address discriminator

Country Status (1)

Country Link
JP (1) JPS5786953A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02245948A (en) * 1989-03-20 1990-10-01 Fujitsu Ltd In-main-storage data transfer system
JPH0374725A (en) * 1989-08-16 1991-03-29 Nec Corp Information processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02245948A (en) * 1989-03-20 1990-10-01 Fujitsu Ltd In-main-storage data transfer system
JPH0374725A (en) * 1989-08-16 1991-03-29 Nec Corp Information processor

Also Published As

Publication number Publication date
JPS6133215B2 (en) 1986-08-01

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