Sharing register file read ports for multiple operand instructions
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United States of America Patent
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Aug 30, 2016
Grant Date -
Apr 4, 2013
app pub date -
Sep 29, 2011
filing date -
Sep 29, 2011
priority date (Note) -
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Abstract
A central processing unit includes a register file having a plurality of read ports, a first execution unit having a first plurality of input ports, and logic operable to selectively couple different arrangements of the read ports to the input ports. A method for reading operands from a register file having a plurality of read ports by a first execution unit having a first plurality of input ports includes scheduling an instruction for execution by the first execution unit and selectively coupling a particular arrangement of the read ports to the input ports based on a type of the instruction.
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