Invention Grant
US08463835B1 Circuit for and method of providing a floating-point adder 有权
提供浮点加法器的电路和方法

  • Patent Title: Circuit for and method of providing a floating-point adder
  • Patent Title (中): 提供浮点加法器的电路和方法
  • Application No.: US11901165
    Application Date: 2007-09-13
  • Publication No.: US08463835B1
    Publication Date: 2013-06-11
  • Inventor: Richard Walke
  • Applicant: Richard Walke
  • Applicant Address: US CA San Jose
  • Assignee: Xilinx, Inc.
  • Current Assignee: Xilinx, Inc.
  • Current Assignee Address: US CA San Jose
  • Agent John J. King
  • Main IPC: G06F7/42
  • IPC: G06F7/42
Circuit for and method of providing a floating-point adder
Abstract:
A floating-point adder circuit is described. The circuit comprises an input multiplexer coupled to receive a first input value and a second input value; an adder-subtractor circuit selectively coupled to receive one of the first input value and the second input value at each of a first input and a second input, wherein the value coupled to the second input is added to or subtracted from the value coupled to the first input; a right shift circuit for aligning the smaller of the first input value and the second input value which is coupled to the second input of the adder-subtractor circuit; and an additional shift circuit (e.g., a left shift/right shift circuit of a combined near path and far path) coupled to the output of the adder-subtractor circuit. A method of implementing a floating-point adder is also disclosed.
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