Patent · US Active

Method and floating point unit to convert a hexadecimal floating point number to a binary floating point number

US7840622B2 · kind B2 · utility

7Cited by

6References

2Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Guenter Gerwig · Simmozheim, DE
Klaus M. Kroener · Ehningen, DE

Key dates

Filing date	Jul 20, 2006
Grant date	Nov 23, 2010
Priority date	—
Expiry date	Apr 19, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH03M7/24
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Method to convert a hexadecimal floating point number (H) into a binary floating point number by using a Floating Point Unit (FPU) with fused multiply add with an A-register a B-register for two multiplicand operands and a C-register for an addend operand, wherein a leading zero counting unit (LZC) is associated to the addend C-register, wherein the difference of the leading zero result provided by the LZC and the input exponent (E) is calculated by a control unit and determines based on the Raw-Result-Exponent a force signal (F) with special conditions like ‘Exponent Overflow’, ‘Exponent Underflow’, and ‘Zero Result’.

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