Method and apparatus for achieving higher frequencies of exactly rounded results
US6134574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | May 8, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/3828
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multiplier configured to obtain higher frequencies of exactly rounded results by adding an adjustment constant to intermediate products generated during iterative multiplication operations is disclosed. One such iterative multiplication operation is the Newton-Raphson iteration, which may be utilized by the multiplier to perform reciprocal calculations and reciprocal square root calculations. For each iteration, the results converge toward an infinitely precise result. To improve the frequency of the exactly rounded result, the results of the iterative calculations may be studied for a large number of differing input operands to determine the best suited value for the adjustment constant. The multiplier may also be configured to perform scalar and packed vector multiplication using the same hardware.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.