Millicode load and test access instruction that blocks interrupts in response to access exceptions
US5790844A · kind A · utility
20Cited by
7References
1Claims
0Family size
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Key dates
| Filing date | Mar 31, 1997 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Mar 31, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/0751
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A special inillicode instruction "Load With Access Test" explicitly detects access exceptions for storage operands while retaining control in the current millicode routine to insure exceptions are handled correctly and with the right priority. The millicode Load With Access Test instruction operates similarly to the ESA/390 Load instruction except that access exception code is set, interrupts are blocked and the serialization is forced to purge the instruction pipeline and reset the pipeline control without redirection of the instruction stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.