ALU with carry length detection
US4623981A · kind A · utility
17Cited by
6References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 20, 1983 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Sep 20, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/5052
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An ALU, performing selected operations on input operands in a predetermined clock cycle, uses means for detecting a carry propagation path greater than a predetermined number of consecutive bit positions to cause a stretching of the clock cycle. Since such a long carry propagation path is detected for only a very small percentage of all operations, the cycle is normally shorter than otherwise possible, AND, thus, the performance of a system using such an improved ALU is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.