The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2013
Filed:
Aug. 28, 2009
Kevin Hurd, Ft. Collins, CO (US);
Daryl Lieu, Menlo Park, CA (US);
Kelvin Goveas, Austin, TX (US);
Scott Hilker, Campbell, CA (US);
Kevin Hurd, Ft. Collins, CO (US);
Daryl Lieu, Menlo Park, CA (US);
Kelvin Goveas, Austin, TX (US);
Scott Hilker, Campbell, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
An apparatus and method for computing a rounded floating point number. A floating point unit (FPU) receives an instruction to round a floating point number to a nearest integral value and retrieves a binary source operand having an exponent of a fixed first number of bits and a mantissa of a fixed second number of bits. If the unbiased exponent value is greater than or equal to zero and less than the fixed second number, the FPU generates a mask having N consecutive '1' bits beginning with the least significant bit and whose remaining bits have a value of '0', where N is equal to the fixed second number minus the unbiased exponent value. The FPU computes a bitwise OR of the source operand with the mask, increments the result if the instruction is to round up, and computes a bitwise AND of the result with the inverse of the mask.