Overflow determination for three-operand alus in a scalable compound instruction set machine which compounds two arithmetic instructions
US5301341A · kind A · utility
23Cited by
9References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 28, 1990 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Nov 28, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/4991
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mechanism is presented for detecting overflow in an interlock collapsing hardware apparatus that simultaneously executes two instructions. The overflow is determined as if the second instruction executes by itself using results from execution of the first instruction. Overflow detection is accomplished by using only values input into, and generated within, the interlock collapsing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.