发明授权
US5805489A Digital microprocessor device having variable-delay division hardware
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具有可变延迟分频硬件的数字微处理器设备
- 专利标题: Digital microprocessor device having variable-delay division hardware
- 专利标题(中): 具有可变延迟分频硬件的数字微处理器设备
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申请号: US646178申请日: 1996-05-07
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公开(公告)号: US5805489A公开(公告)日: 1998-09-08
- 发明人: John Susantha Fernando
- 申请人: John Susantha Fernando
- 申请人地址: NJ Murray Hill
- 专利权人: Lucent Technologies Inc.
- 当前专利权人: Lucent Technologies Inc.
- 当前专利权人地址: NJ Murray Hill
- 主分类号: G06F7/537
- IPC分类号: G06F7/537 ; G06F5/01 ; G06F7/52 ; G06F7/535
摘要:
The present invention is a variable-delay division (VDD) scheme implementable in hardware to execute signed and unsigned integer division and remainder operations in digital processor. The VDD scheme advantageously uses hardware utilized for multiplication to implement a 2-bits/cycle alignment step to iteratively align the divisor with the dividend. This speeds up the alignment phase of integer division. Quotient bits are produced at the rate of 1-bit/cycle using the well-known restoring scheme. For 32-bit 2's complement operands, the scheme has a delay less than a fixed-delay scheme for most operands.
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