Code determination using half-adder based operand comparator
US4578750A · kind A · utility
48Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1983 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Aug 24, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/3884
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method and apparatus for predicting the condition code of a condition-code-setting instruction by comparing operands in a data processing system. An operand comparator includes one or more half-adders to predict carry outs at an early time. The comparator is used in a data processing system which is operative in response to instructions having operation codes for specifying operations to be executed. The instructions also have operand fields for identifying operands to be utilized in connection with executing the instructions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.