JPS6488838A - Data processor - Google Patents

Data processor

Info

Publication number
JPS6488838A
JPS6488838A JP62246623A JP24662387A JPS6488838A JP S6488838 A JPS6488838 A JP S6488838A JP 62246623 A JP62246623 A JP 62246623A JP 24662387 A JP24662387 A JP 24662387A JP S6488838 A JPS6488838 A JP S6488838A
Authority
JP
Japan
Prior art keywords
instruction
literal
expressable
accordance
range
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
JP62246623A
Other languages
Japanese (ja)
Other versions
JPH0774990B2 (en
Inventor
Takeshi Sakamura
Jiro Korematsu
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62246623A priority Critical patent/JPH0774990B2/en
Publication of JPS6488838A publication Critical patent/JPS6488838A/en
Priority to US07/882,743 priority patent/US5307474A/en
Publication of JPH0774990B2 publication Critical patent/JPH0774990B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Executing Machine-Instructions (AREA)

Abstract

PURPOSE:To reduce the number of instructions by changing the range of expressable constant data included in an instruction in accordance with the instruction. CONSTITUTION:When an instruction 41 is inputted to an instruction decoding part 43, the decoding part 43 sends the bit width and the classification of a literal 42 to a literal extending part 44. The extending part 44 extends the literal in accordance with a control signal 52 (the bit width and the classification of the literal) from the decoding part 43 to generate an operand value 45. By this constitution, 0-2N-1, 1-2N, -1--2N or 0-2X(2N-1) is selected as the expressable range of N-bit constant data in accordance with the instruction. Thus, the expressable range of constant data included in the instruction is extended, and the number of instructions is reduced.
JP62246623A 1987-09-30 1987-09-30 Data processing device Expired - Fee Related JPH0774990B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62246623A JPH0774990B2 (en) 1987-09-30 1987-09-30 Data processing device
US07/882,743 US5307474A (en) 1987-09-30 1992-05-11 Apparatus and method for processing literal operand computer instructions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62246623A JPH0774990B2 (en) 1987-09-30 1987-09-30 Data processing device

Publications (2)

Publication Number Publication Date
JPS6488838A true JPS6488838A (en) 1989-04-03
JPH0774990B2 JPH0774990B2 (en) 1995-08-09

Family

ID=17151158

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62246623A Expired - Fee Related JPH0774990B2 (en) 1987-09-30 1987-09-30 Data processing device

Country Status (1)

Country Link
JP (1) JPH0774990B2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54129944A (en) * 1978-03-31 1979-10-08 Toshiba Corp Arithmetic controller
JPS623333A (en) * 1985-06-28 1987-01-09 Yokogawa Hewlett Packard Ltd Bit group register system
JPS623338A (en) * 1985-06-28 1987-01-09 Yokogawa Hewlett Packard Ltd Direct value processing system
JPS62259140A (en) * 1986-05-06 1987-11-11 Oki Electric Ind Co Ltd Address generating circuit
JPS63629A (en) * 1986-06-20 1988-01-05 Fujitsu Ltd Data processing system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54129944A (en) * 1978-03-31 1979-10-08 Toshiba Corp Arithmetic controller
JPS623333A (en) * 1985-06-28 1987-01-09 Yokogawa Hewlett Packard Ltd Bit group register system
JPS623338A (en) * 1985-06-28 1987-01-09 Yokogawa Hewlett Packard Ltd Direct value processing system
JPS62259140A (en) * 1986-05-06 1987-11-11 Oki Electric Ind Co Ltd Address generating circuit
JPS63629A (en) * 1986-06-20 1988-01-05 Fujitsu Ltd Data processing system

Also Published As

Publication number Publication date
JPH0774990B2 (en) 1995-08-09

Similar Documents

Publication Publication Date Title
DE69232232D1 (en) microcomputer
JPS5334421A (en) Automatic reade for bar code
JPS52128024A (en) Binal data coding method
ATE64044T1 (en) LOGIC CIRCUIT WITH DYNAMIC CONTROLLABLE OUTPUT.
JPS6488838A (en) Data processor
JPS53134335A (en) Memory control system
JPS52146655A (en) Data processing and controlling unit of balances, etc.
JPS5750051A (en) Program controller
JPS5380132A (en) Signal control circuit
JPS5255315A (en) Data transmission control unit
JPS5351936A (en) High speed addition circuit
JPS5541565A (en) Address modification system
JPS53130943A (en) Microprogram control system
JPS57196350A (en) Data processor
EP0313817A3 (en) Method and apparatus for explicitly evaluating conditions in a data processor
JPS5363802A (en) Sound recognition unit
JPS53100744A (en) Buffer control system
JPS533042A (en) Electronic computer
JPS5350721A (en) Electronic musical instrument
JPS5621224A (en) Character input unit
JPS57147703A (en) Input and output controller
JPS6486271A (en) Accumulator
JPS5483723A (en) Printer for information processing
JPS5771054A (en) Microprogram controller
JPS5421229A (en) Data fetch system

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees