Reservation station including addressable constant store for a floating point processing unit
US5761105A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1997 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | May 13, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/382
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reservation station with an addressable constant store enables the provision of floating point constants to arithmetic units in a floating point unit of a superscalar processor. Floating point constant identifiers supplied with floating point instructions index into the addressable store and addressed constant are provided in an internal, extended-precision format which provides extra precision and/or range when compared with formats available external to the floating point unit. In this way, full internal, extended-precision constants can be provided for use in microcoded floating point instruction sequences. Additionally, internal extended-precision floating point constants may be rounded in accordance with a prevailing rounding mode and format to provide external format floating point constant values for use in implementing load constant instructions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.