Patent · US Active

Encoding densely packed decimals

US9128758B2 · kind B2 · utility

0Cited by

1References

14Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Michael K. Kroener · Ehningen, DE
Christophe J. Layer · Eppelheim, DE
Petra Leber · Ehningen, DE
Silvia M. Mueller · Altdorf, DE

Key dates

Filing date	Nov 15, 2011
Grant date	Sep 8, 2015
Priority date	—
Expiry date	Jul 9, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG06F2207/4912
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

According to one aspect of the present disclosure, a method and technique for encoding densely packed decimals is disclosed. The method includes: executing a floating point instruction configured to perform a floating point operation on decimal data in a binary coded decimal (BCD) format; determining whether a result of the operation includes a rounded mantissa overflow; and responsive to determining that the result of the operation includes a rounded mantissa overflow, compressing a result of the operation from the BCD-formatted decimal data to decimal data in a densely packed decimal (DPD) format by shifting select bit values of the BCD formatted decimal data by one digit to select bit positions in the DPD format.

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