JPS5694438A - Microprogram control type data processing device - Google Patents

Microprogram control type data processing device

Info

Publication number
JPS5694438A
JPS5694438A JP17068979A JP17068979A JPS5694438A JP S5694438 A JPS5694438 A JP S5694438A JP 17068979 A JP17068979 A JP 17068979A JP 17068979 A JP17068979 A JP 17068979A JP S5694438 A JPS5694438 A JP S5694438A
Authority
JP
Japan
Prior art keywords
branch
instruction
circuit
execution
processing device
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
JP17068979A
Other languages
Japanese (ja)
Inventor
Yasushi Yokoyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP17068979A priority Critical patent/JPS5694438A/en
Publication of JPS5694438A publication Critical patent/JPS5694438A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the performance of a processing device, by introducing the hardware capable of executing the branch instruction to reduce the number of execution steps for the execution of the delay type conditional branch instruction.
CONSTITUTION: The address selecting circuit 38 is controlled to output the forced branch address of micro (μ) instruction register 22 to μ program storage device 21, and the pattern of the branch destination address as the μ instruction word to be executed next is read to μ instruction register 22 and is set to delay branch FF37 simultaneously. Next, the operation specified by execution control field 26 is executed, and FF37 is set or reset according to the operation result. The value of the specified field 31 of the delay type conditional instruction is latched to branch condition selection signal latch circuit 33, and the output of circuit 33 is input to comparing circuit 35. In the next step, contents of specified value field 31 and the operation result which determined the branch condition set in FF37 are compared by comparing circuit 35, and it is checked whether the branch condition is satisfied or not, thus reducing the number of execution steps.
COPYRIGHT: (C)1981,JPO&Japio
JP17068979A 1979-12-27 1979-12-27 Microprogram control type data processing device Pending JPS5694438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17068979A JPS5694438A (en) 1979-12-27 1979-12-27 Microprogram control type data processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17068979A JPS5694438A (en) 1979-12-27 1979-12-27 Microprogram control type data processing device

Publications (1)

Publication Number Publication Date
JPS5694438A true JPS5694438A (en) 1981-07-30

Family

ID=15909561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17068979A Pending JPS5694438A (en) 1979-12-27 1979-12-27 Microprogram control type data processing device

Country Status (1)

Country Link
JP (1) JPS5694438A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02266432A (en) * 1989-04-06 1990-10-31 Koufu Nippon Denki Kk Microprogram controller

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5081040A (en) * 1973-11-15 1975-07-01
JPS5222841A (en) * 1975-08-15 1977-02-21 Hitachi Ltd Micro program control method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5081040A (en) * 1973-11-15 1975-07-01
JPS5222841A (en) * 1975-08-15 1977-02-21 Hitachi Ltd Micro program control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02266432A (en) * 1989-04-06 1990-10-31 Koufu Nippon Denki Kk Microprogram controller

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