公开(公告)号：US08683411B2

公开(公告)日：2014-03-25

申请号：US12870624

申请日：2010-08-27

申请人： Charles J. Alpert ,  John L. McCann ,  Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Natarajan Viswanathan

发明人： Charles J. Alpert ,  John L. McCann ,  Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Natarajan Viswanathan

IPC分类号： G06F17/50

CPC分类号： G06F17/5072

摘要： A global placer receives a plurality of regions, each region occupying a sub-area of a design area. receives a plurality of movebound objects, each movebound object associated with a region. The global placer receives a plurality of unconstrained objects, each unconstrained object associated with no region. The global placer receives a tolerance, wherein the placement tolerance defines a coronal fringe to at least one region. The global placer initially placing the plurality of movebound objects and unconstrained objects. The global placer iterates over objects without preference to region-affiliation to select an object, wherein the objects are comprised of the plurality of movebound objects and plurality of unconstrained objects. The global placer determines whether movebound object is within the tolerance of a region associated with the movebound object.

摘要翻译： 全局放置器接收多个区域，每个区域占据设计区域的子区域。 接收多个移动对象，每个移动对象与一个区域相关联。 全局放置器接收多个无约束对象，每个无约束对象与无区域相关联。 全局放置器接收公差，其中放置公差将至少一个区域的冠状边缘定义。 全局放置器最初放置多个移动对象和非约束对象。 全局排列器迭代对象而不偏好区域属性来选择对象，其中对象由多个移动对象和多个无约束对象组成。 全局置位器确定移动对象是否在与移动对象相关联的区域的公差范围内。

公开(公告)号：US08245173B2

公开(公告)日：2012-08-14

申请号：US12359369

申请日：2009-01-26

申请人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

发明人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

IPC分类号： G06F17/50

CPC分类号： G06F17/50 ,  G06F9/5066

摘要： Scheduling of parallel processing for regionally-constrained object placement selects between different balancing schemes. For a small number of movebounds, computations are assigned by balancing the placeable objects. For a small number of objects per movebound, computations are assigned by balancing the movebounds. If there are large numbers of movebounds and objects per movebound, both objects and movebounds are balanced amongst the processors. For object balancing, movebounds are assigned to a processor until an amortized number of objects for the processor exceeds a first limit above an ideal number, or the next movebound would raise the amortized number of objects above a second, greater limit. For object and movebound balancing, movebounds are sorted into descending order, then assigned in the descending order to host processors in successive rounds while reversing the processor order after each round. The invention provides a schedule in polynomial-time while retaining high quality of results.

摘要翻译： 区域约束对象放置的并行处理调度在不同的平衡方案之间进行选择。 对于少量的移动端口，通过平衡可放置对象来分配计算。 对于每次移动的少量对象，通过平衡移动端口分配计算。 如果每次移动都有大量的移动和对象，则处理器之间的对象和移动对象都是平衡的。 对于对象平衡，移动端口被分配给一个处理器，直到处理器的对象的摊销数量超过理想数量以上的第一个限制，或者下一个移动端口将提高超过第二个更大限制的对象数量。 对于对象和移动平衡，移动排列按降序排列，然后按顺序分配给主机处理器，连续回合，同时在每轮之后反转处理器顺序。 本发明提供多项式时间的时间表，同时保持高质量的结果。

公开(公告)号：US20120284733A1

公开(公告)日：2012-11-08

申请号：US13550957

申请日：2012-07-17

申请人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

发明人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

IPC分类号： G06F9/46

CPC分类号： G06F17/50 ,  G06F9/5066

摘要： Scheduling of parallel processing for regionally-constrained object placement selects between different balancing schemes. For a small number of movebounds, computations are assigned by balancing the placeable objects. For a small number of objects per movebound, computations are assigned by balancing the movebounds. If there are large numbers of movebounds and objects per movebound, both objects and movebounds are balanced amongst the processors. For object balancing, movebounds are assigned to a processor until an amortized number of objects for the processor exceeds a first limit above an ideal number, or the next movebound would raise the amortized number of objects above a second, greater limit. For object and movebound balancing, movebounds are sorted into descending order, then assigned in the descending order to host processors in successive rounds while reversing the processor order after each round. The invention provides a schedule in polynomial-time while retaining high quality of results.

摘要翻译： 区域约束对象放置的并行处理调度在不同的平衡方案之间进行选择。 对于少量的移动端口，通过平衡可放置对象来分配计算。 对于每次移动的少量对象，通过平衡移动端口分配计算。 如果每次移动都有大量的移动和对象，则处理器之间的对象和移动对象都是平衡的。 对于对象平衡，移动端口被分配给一个处理器，直到处理器的摊销对象数量超过理想数量以上的第一个限制，或者下一个移动端口将提高超过第二个更大限制的对象数量。 对于对象和移动平衡，移动排列按降序排列，然后按顺序分配给主机处理器，连续回合，同时在每轮之后反转处理器顺序。 本发明提供多项式时间的时间表，同时保持高质量的结果。

公开(公告)号：US20110302545A1

公开(公告)日：2011-12-08

申请号：US12796501

申请日：2010-06-08

申请人： Charles J. Alpert ,  Andrew D. Huber ,  Zhuo Li ,  Gi-Joon Nam ,  Shyam Ramji ,  Jarrod A. Roy ,  Taraneh Taghavi ,  Gustavo E. Tellez ,  Paul G. Villarrubia ,  Natarajan Viswanathan

发明人： Charles J. Alpert ,  Andrew D. Huber ,  Zhuo Li ,  Gi-Joon Nam ,  Shyam Ramji ,  Jarrod A. Roy ,  Taraneh Taghavi ,  Gustavo E. Tellez ,  Paul G. Villarrubia ,  Natarajan Viswanathan

IPC分类号： G06F17/50

CPC分类号： G06F17/5072

摘要： A computer implemented method, data processing system, and computer program product for reworking a plurality of cells initially placed in a circuit design. An expander allocates cells to tiles, wherein some tiles have cells. The expander determines a high detailed routing cost tile class, wherein the high detailed routing cost tile class is a class of tiles that are high detailed routing cost tiles. The expander selects a cell within a tile of the high detailed routing cost tile class to form a selected cell and a selected tile. The expander places an expanded bounding box around the selected cell, wherein the bounding box extends to at least one tile adjacent the selected tile. The expander expands the selected cell within the bounding box to form a modified design, determines an aggregate routing cost among other steps, and affirms the modified design for further processing.

摘要翻译： 一种计算机实现的方法，数据处理系统和用于重新设计最初放置在电路设计中的多个单元的计算机程序产品。 扩展器将单元格分配给图块，其中某些图块具有单元格。 扩展器确定高详细路由成本瓦片类，其中高详细路由成本瓦片类是作为高详细路由成本瓦片的瓦片类。 扩展器选择高详细路由代价块类别的块内的单元，以形成所选择的单元和所选择的块。 扩展器将扩展的边界框放置在所选择的单元周围，其中边界框延伸到与所选择的瓦片相邻的至少一个瓦片。 扩展器在边界框内扩展所选单元格以形成修改的设计，确定其他步骤之间的汇总路由成本，并确认修改后的设计以进行进一步处理。

公开(公告)号：US20100192155A1

公开(公告)日：2010-07-29

申请号：US12359369

申请日：2009-01-26

申请人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

发明人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

IPC分类号： G06F9/50 ,  G06F9/46

CPC分类号： G06F17/50 ,  G06F9/5066

摘要： Scheduling of parallel processing for regionally-constrained object placement selects between different balancing schemes. For a small number of movebounds, computations are assigned by balancing the placeable objects. For a small number of objects per movebound, computations are assigned by balancing the movebounds. If there are large numbers of movebounds and objects per movebound, both objects and movebounds are balanced amongst the processors. For object balancing, movebounds are assigned to a processor until an amortized number of objects for the processor exceeds a first limit above an ideal number, or the next movebound would raise the amortized number of objects above a second, greater limit. For object and movebound balancing, movebounds are sorted into descending order, then assigned in the descending order to host processors in successive rounds while reversing the processor order after each round. The invention provides a schedule in polynomial-time while retaining high quality of results.

摘要翻译： 区域约束对象放置的并行处理调度在不同的平衡方案之间进行选择。 对于少量的移动端口，通过平衡可放置对象来分配计算。 对于每次移动的少量对象，通过平衡移动端口分配计算。 如果每次移动都有大量的移动和对象，则处理器之间的对象和移动对象都是平衡的。 对于对象平衡，移动端口被分配给一个处理器，直到处理器的对象的摊销数量超过理想数量以上的第一个限制，或者下一个移动端口将提高超过第二个更大限制的对象数量。 对于对象和移动平衡，移动排列按降序排列，然后按顺序分配给主机处理器，连续回合，同时在每轮之后反转处理器顺序。 本发明提供多项式时间的时间表，同时保持高质量的结果。

公开(公告)号：US08578315B2

公开(公告)日：2013-11-05

申请号：US13550957

申请日：2012-07-17

申请人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

发明人： Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Paul G. Villarrubia

IPC分类号： G06F17/50

CPC分类号： G06F17/50 ,  G06F9/5066

摘要： Scheduling of parallel processing for regionally-constrained object placement selects between different balancing schemes. For a small number of movebounds, computations are assigned by balancing the placeable objects. For a small number of objects per movebound, computations are assigned by balancing the movebounds. If there are large numbers of movebounds and objects per movebound, both objects and movebounds are balanced amongst the processors. For object balancing, movebounds are assigned to a processor until an amortized number of objects for the processor exceeds a first limit above an ideal number, or the next movebound would raise the amortized number of objects above a second, greater limit. For object and movebound balancing, movebounds are sorted into descending order, then assigned in the descending order to host processors in successive rounds while reversing the processor order after each round. The invention provides a schedule in polynomial-time while retaining high quality of results.

公开(公告)号：US20120054708A1

公开(公告)日：2012-03-01

申请号：US12870624

申请日：2010-08-27

申请人： Charles J. Alpert ,  John L. McCann ,  Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Natarajan Viswanathan

发明人： Charles J. Alpert ,  John L. McCann ,  Gi-Joon Nam ,  Shyam Ramji ,  Taraneh Taghavi ,  Natarajan Viswanathan

IPC分类号： G06F17/50

CPC分类号： G06F17/5072

摘要： A global placer receives a plurality of regions, each region occupying a sub-area of a design area. receives a plurality of movebound objects, each movebound object associated with a region. The global placer receives a plurality of unconstrained objects, each unconstrained object associated with no region. The global placer receives a tolerance, wherein the placement tolerance defines a coronal fringe to at least one region. The global placer initially placing the plurality of movebound objects and unconstrained objects. The global placer iterates over objects without preference to region-affiliation to select an object, wherein the objects are comprised of the plurality of movebound objects and plurality of unconstrained objects. The global placer determines whether movebound object is within the tolerance of a region associated with the movebound object.

摘要翻译： 全局放置器接收多个区域，每个区域占据设计区域的子区域。 接收多个移动对象，每个移动对象与一个区域相关联。 全局放置器接收多个无约束对象，每个无约束对象与无区域相关联。 全局放置器接收公差，其中放置公差将至少一个区域的冠状边缘定义。 全局放置器最初放置多个移动对象和非约束对象。 全局排列器迭代对象而不偏好区域属性来选择对象，其中对象由多个移动对象和多个无约束对象组成。 全局置位器确定移动对象是否在与移动对象相关联的区域的公差范围内。

公开(公告)号：US20110302544A1

公开(公告)日：2011-12-08

申请号：US12796550

申请日：2010-06-08

申请人： Charles J. Alpert ,  Zhuo Li ,  Gi-Joon Nam ,  Shyam Ramji ,  Lakshmi N. Reddy ,  Jarrod A. Roy ,  Taraneh Taghavi ,  Paul G. Villarrubia ,  Natarajan Viswanathan

发明人： Charles J. Alpert ,  Zhuo Li ,  Gi-Joon Nam ,  Shyam Ramji ,  Lakshmi N. Reddy ,  Jarrod A. Roy ,  Taraneh Taghavi ,  Paul G. Villarrubia ,  Natarajan Viswanathan

IPC分类号： G06F17/50

CPC分类号： G06F17/5072

摘要： A computer implemented method, data processing system, and computer program product for reworking a plurality of cells initially placed in a circuit design. An expander allocates cells to tiles. The expander determines a high detailed routing cost tile class, wherein the high detailed routing cost tile class is a class of tiles that has high detailed routing costs. The expander selects a cell within a tile of the high detailed routing cost tile class to form a selected cell in a selected tile. The expander applies multiple techniques to reposition these cells at new locations to improve the detailed routability. The expander can place an expanded bounding box around the selected cell, wherein the bounding box extends to at least one tile adjacent the selected tile, and repositions the selected cell within the bounding box to form a modified design to improve the detailed routability. The expander may also inflate and legalize those cells.

摘要翻译： 一种计算机实现的方法，数据处理系统和用于重新设计最初放置在电路设计中的多个单元的计算机程序产品。 扩展器将单元格分配给图块。 扩展器确定高度详细的路由成本瓦片类，其中高详细路由成本瓦片类是具有高详细路由成本的一类瓦片。 扩展器选择高详细路由代价块类别的块内的单元，以在所选择的块中形成选定的单元。 扩展器应用多种技术在新位置重新定位这些单元，以提高详细的可布线性。 扩展器可以在所选择的单元周围放置扩展的边界框，其中边界框延伸到与所选择的瓦片相邻的至少一个瓦片，并且在边界框内重新定位所选择的单元以形成修改的设计以改进详细的可布线性。 扩张器也可能使这些细胞膨胀并合法化。