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JPS57106958A - Data processor - Google Patents

Data processor

Info

Publication number
JPS57106958A
JPS57106958A JP18351880A JP18351880A JPS57106958A JP S57106958 A JPS57106958 A JP S57106958A JP 18351880 A JP18351880 A JP 18351880A JP 18351880 A JP18351880 A JP 18351880A JP S57106958 A JPS57106958 A JP S57106958A
Authority
JP
Japan
Prior art keywords
microprogram
operand
preprocessing unit
data processor
shifting
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
JP18351880A
Other languages
Japanese (ja)
Other versions
JPS6112287B2 (en
Inventor
Toshihisa Matsuo
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 JP18351880A priority Critical patent/JPS57106958A/en
Publication of JPS57106958A publication Critical patent/JPS57106958A/en
Publication of JPS6112287B2 publication Critical patent/JPS6112287B2/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
    • G06F9/30032—Movement instructions, e.g. MOVE, SHIFT, ROTATE, SHUFFLE

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To realize an operand shifting function which has performance similar to that completely realized by hardware, by decreasing a physical quantity, by introducing part of microprogram control into the operand shifting function of a data processor. CONSTITUTION:When a preprocessing unit passes control to a microprogram, the left number of the 2nd operand generated by the preprocessing unit is transferred to a shift counter 16 which can be used by the microprogram. Then, a branch to the microprogram is discriminated to facilitate the qualification of a shift number and the update of the 2nd operand address. For reading the 2nd operand, the same microinstruction is used regardless of the performance of shifting operation. Whether shifting operation is needed or not is judged by discriminating whether an indicator is set or not by the preprocessing unit. Thus, operands, required by the instruction, starting at a next address are read by the microprogram successively to the preprocessing unit.
JP18351880A 1980-12-24 1980-12-24 Data processor Granted JPS57106958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18351880A JPS57106958A (en) 1980-12-24 1980-12-24 Data processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18351880A JPS57106958A (en) 1980-12-24 1980-12-24 Data processor

Publications (2)

Publication Number Publication Date
JPS57106958A true JPS57106958A (en) 1982-07-03
JPS6112287B2 JPS6112287B2 (en) 1986-04-07

Family

ID=16137240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18351880A Granted JPS57106958A (en) 1980-12-24 1980-12-24 Data processor

Country Status (1)

Country Link
JP (1) JPS57106958A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07160496A (en) * 1993-12-09 1995-06-23 Nec Corp Control storage switching system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223305U (en) * 1975-08-08 1977-02-18
JPS5253727U (en) * 1975-10-16 1977-04-18
JPS5522635U (en) * 1978-07-31 1980-02-14

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223305U (en) * 1975-08-08 1977-02-18
JPS5253727U (en) * 1975-10-16 1977-04-18
JPS5522635U (en) * 1978-07-31 1980-02-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07160496A (en) * 1993-12-09 1995-06-23 Nec Corp Control storage switching system

Also Published As

Publication number Publication date
JPS6112287B2 (en) 1986-04-07

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