1997-03-31
1999-05-11
An, Meng-Ai T.
39580002, G06F17/16
Patent
active
059037695
ABSTRACT:
A vector processor with a vector mask control unit provides an efficient approach for execution of conditional loops by a vector processor. The vector mask control unit includes respective vector masks for source and destination vector registers to specify the vector elements that should participate in the execution operation. Only the vector elements that correspond to active mask elements then participate in the execution operation, thus increasing the efficiency of the vector processor in executing conditional loops. Providing a vector mask control unit also allows the vector processor to perform a variety of functions more efficiently. For example, using a vector mask circuit allows a vector processor to efficiently perform vector reduction operations, neighboring vector operations and discrete fourier transform operations
REFERENCES:
patent: 4490786 (1984-12-01), Nakatani
patent: 4956767 (1990-09-01), Stephenson
An Meng-Ai T.
Follansbee John
Sun Microsystems Inc.
Terrile Stephen A.
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