Microprogram controller in which instruction following conditional branch instruction is selectively converted to a NOP instruction
US4773002A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1986 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | May 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/264
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a microprogram controller by pipeline control which includes a memory for storing a microprogram and a program counter for representing the address of the memory, a microprogram controller includes means for judging whether or not a branch condition of a branch microinstruction is satisfied and means for converting the microinstruction fetched from the memory to a NOP (No Operation) microinstruction from the output of the next step of the memory till the outputs after a plurality of steps by the affirmation output of the judging means. When the affirmation output is obtained from the judging means, part of the memory output is loaded into the program counter and when the negation output is obtained, a value as the sum of a current value plus 1 is loaded into the program counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.