Invention Grant
- 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
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Application No.: US11901165Application Date: 2007-09-13
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Publication No.: US08463835B1Publication 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

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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