Invention Grant
- Patent Title: Arithmetic processing unit that performs multiply and multiply-add operations with saturation and method therefor
- Patent Title (中): 使用饱和度进行乘法和乘法运算的算术处理单元及其方法
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Application No.: US12472715Application Date: 2009-05-27
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Publication No.: US08316071B2Publication Date: 2012-11-20
- Inventor: Kevin A. Hurd , Scott A. Hilker
- Applicant: Kevin A. Hurd , Scott A. Hilker
- Applicant Address: US CA Sunnyvale
- Assignee: Advanced Micro Devices, Inc.
- Current Assignee: Advanced Micro Devices, Inc.
- Current Assignee Address: US CA Sunnyvale
- Main IPC: G06F7/38
- IPC: G06F7/38 ; G06F9/44
Abstract:
Sum and carry signals are formed representing a product of a first and a second operand. A bias signal is formed having a value determined by a sign of a product of the first and the second operand. An output signal is provided based on an addition of the sum signal, the carry signal, a sign-extended addend, and the bias signal. A portion of the output signal, a saturated minimum value, or a saturated maximum value, is selected as a final result based on the sign of the product and a sign of the output signal.
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