Multifunction arithmetic logic unit circuit
US4815021A · kind A · utility
9Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1986 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Jan 30, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/3884
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multifunction arithmetic logic circuit having comparison and numeric conversion circuitry, particularly adapted for use in graphics processing. The inventive architecture comprises a modular arithmetic logic unit in a pipelined architecture circuit. Functions performed are conversion of floating point numbers to fixed point numbers, and vise versa, arithmetic and logical operations, and numeric comparison operations. A visibility logic subcircuit is included for rapidly tracking numeric comparisons to indicate whether a graphics object is to be considered visible, partially visible, or invisible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.