05978901 is referenced by 59 patents and cites 33 patents.

A superscalar microprocessor includes a combination floating point and multimedia unit. The floating point and multimedia unit includes one set of registers. The multimedia core and floating point core share the one set of registers. Each register as a type field associated with the register. The type field identifies whether the associated register contains valid data and whether the data is of multimedia type or floating point type. If the register stores floating point type data, the type field further indicates which of a plurality of floating point types the register stores such as: zero, infinity and normal. The floating point core relies on the type field to identify special floating point numbers such as zero and infinity. To ensure predictable results when a floating point instruction is executed subsequent to a multimedia instruction, a retyping algorithm retypes registers typed as multimedia type when the first floating point instruction subsequent to a multimedia instruction is executed. The retyping algorithm reads each register and reclassifies the registers classified as multimedia type. The reclassification algorithm classifies the contents of the register interpreted as floating point data.

Title
Floating point and multimedia unit with data type reclassification capability
Application Number
8/916056
Publication Number
5978901
Application Date
August 21, 1997
Publication Date
November 2, 1999
Inventor
Ashraf Ahmed
Austin
TX, US
Chris N Hinds
Austin
TX, US
Paul K Miller
Austin
TX, US
Mark R Luedtke
Round Rock
TX, US
Agent
Conley Rose & Tayon PC
Agent
B Noel Kivlin
Assignee
Advanced Micro Devices
CA, US
IPC
G06F 9/302
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