Patent · US Active

Rotate then operate on selected bits facility and instructions therefore

US7895419B2 · kind B2 · utility

30Cited by

20References

18Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Dan F. Greiner · San Jose, US
Timothy J. Slegel · Staatsburg, US
Joachim von Buttlar · Schenefeld, DE

Key dates

Filing date	Jan 11, 2008
Grant date	Feb 22, 2011
Priority date	—
Expiry date	Apr 10, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG06F9/342
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A rotate then operate instruction having a T bit is fetched and executed wherein a first operand in a first register is rotated by an amount and a Boolean operation is performed on a selected portion of the rotated first operand and a second operand in of a second register. If the T bit is ‘0’ the selected portion of the result of the Boolean operation is inserted into corresponding bits of a second operand of a second register. If the T bit is ‘1’, in addition to the inserted bits, the bits other than the selected portion of the rotated first operand are saved in the second register.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.