Multiplier operable to perform a variety of operations
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United States of America Patent
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May 18, 2010
Grant Date -
N/A
app pub date -
May 26, 2006
filing date -
May 26, 2006
priority date (Note) -
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Abstract
Methods and apparatus are provided for implementing circuitry operable to perform barrel shifting, multiplication, and rotation operations in hard coded logic on a programmable chip. A hard coded multiplier is augmented using multiplexer circuitry, a logical operation, and a bypassable 2^N functional block. Based on control signals, the multiplexer circuitry can be used to select a rotation, multiplication, or barrel shifted output. Multiplexer control signals also provide sign information associated with operands passed to the multiplier. A single augmented multiplier can perform barrel shifting, rotation, or multiplication operations. Inputs of a multiplier can also be selectively grounded to allow the multiplier to perform logic operations.
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