发明授权
- 专利标题: Decimal multiplication for superscaler processors
- 专利标题(中): 超标量处理器的十进制乘法
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申请号: US10436392申请日: 2003-05-12
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公开(公告)号: US07167889B2公开(公告)日: 2007-01-23
- 发明人: Fadi Y. Busaba , Steven R. Carlough , Christopher A. Krygowski , John G. Rell, Jr.
- 申请人: Fadi Y. Busaba , Steven R. Carlough , Christopher A. Krygowski , John G. Rell, Jr.
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Cantor Colburn LLP
- 主分类号: G06F7/523
- IPC分类号: G06F7/523
摘要:
A method for decimal multiplication in a superscaler processor comprising: obtaining a first operand and a second operand; establishing a multiplier and an effective multiplicand from the first operand and the second operand; and generating and accumulating a partial product term every two cycles. The partial product terms are created from the effective multiplicand and multiples of the multiplier, where the effective multiplicand is stored in a first register file, the multiples being ones times the effective multiplier, two times the effective multiplier, four times the effective multiplier and eight times the effective multiplier and the partial product terms are added to an accumulation of previous partial product terms shifted one digit right such that a digit shifted off is preserved as a result digit.
公开/授权文献
- US20040230633A1 Decimal multiplication for superscaler processors 公开/授权日:2004-11-18
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