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1. 发明授权

US5761723A Data processor with branch prediction and method of operation 失效
标题翻译：具有分支预测和操作方法的数据处理器
公开(公告)号：US5761723A
公开(公告)日：1998-06-02
申请号：US637189
申请日：1996-04-08
申请人： Bryan P. Black , Marvin Denman , Mark A. Kearney , Seungyoon Peter Song
发明人： Bryan P. Black , Marvin Denman , Mark A. Kearney , Seungyoon Peter Song
IPC分类号： G06F9/38 , G06F12/08
CPC分类号： G06F9/3806 , G06F9/3844 , G06F9/3861
摘要： A data processor (10) has a branch target address cache (48) for storing the target addresses of a number of recently taken branch instructions. Normally, each fetch address is compared to the contents of the branch target address cache. If a hit occurs, then the data processor branches to the cached target address. The data processor also has a dispatch unit (60) that invalidates the data stored in the branch target address cache if and when it determines that the branch target address cache "hit" on an instruction that was not a branch instruction at all, a "phantom branch." The data processor thereby automatically invalidates its branch target address cache data after a context switch.
摘要翻译：数据处理器（10）具有分支目标地址高速缓冲存储器（48），用于存储多个最近采取的分支指令的目标地址。通常，将每个获取地址与分支目标地址高速缓存的内容进行比较。如果发生命中，则数据处理器分支到缓存的目标地址。数据处理器还具有一个调度单元（60），当分支目标地址缓存器确定分支目标地址高速缓冲存储器“完全不是分支指令”的指令时，使分配目标地址缓存中存储的数据无效，幻影分支“。因此，数据处理器在上下文切换之后自动使其分支目标地址高速缓存数据失效。

2. 发明授权

US5664215A Data processor with an execution unit for performing load instructions and method of operation 失效
标题翻译：具有用于执行加载指令和操作方法的执行单元的数据处理器
公开(公告)号：US5664215A
公开(公告)日：1997-09-02
申请号：US622159
申请日：1996-03-27
申请人： David P. Burgess , Marvin Denman , Milton M. Hood, Jr. , Mark A. Kearney , Lavanya Kling , Graham R. Murphy , Seungyoon Peter Song
发明人： David P. Burgess , Marvin Denman , Milton M. Hood, Jr. , Mark A. Kearney , Lavanya Kling , Graham R. Murphy , Seungyoon Peter Song
IPC分类号： G06F9/312 , G06F9/318 , G06F9/38
CPC分类号： G06F9/30043 , G06F9/3017 , G06F9/3816 , G06F9/3824 , G06F9/3836 , G06F9/384 , G06F9/3855 , G06F9/3857
摘要： The disclosed data processor (10) dispatches load/store multiple and load/store string instructions to a load/store unit (28) as a sequence of simple load or store instructions. The sequencer unit (18) assigns an entry of a rename buffer (34) to which the load/store unit writes back the data of each simple load instruction. This strategy facilitates early data forwarding for subsequent instructions. Conversely, the sequencer unit supplies a rename buffer tag to the load/store unit if it is not able to supply the operands of a simple store instruction.
摘要翻译：所公开的数据处理器（10）作为一系列简单的加载或存储指令来调度加载/存储多个并将加载/存储字符串指令加载/存储单元（28）。定序器单元（18）分配加载/存储单元写入每个简单加载指令的数据的重命名缓冲器（34）的条目。该策略有助于提前进行数据转发以便后续指令。相反，如果定序器单元不能提供简单存储指令的操作数，则将重命名缓冲器标签提供给加载/存储单元。

3. 发明申请

US20120124345A1 CUMULATIVE CONFIDENCE FETCH THROTTLING 有权
标题翻译：累积信心电流谐波
公开(公告)号：US20120124345A1
公开(公告)日：2012-05-17
申请号：US12946491
申请日：2010-11-15
申请人： Marvin Denman , James Dundas , Bradley Gene Burgess , Jeff Rupley
发明人： Marvin Denman , James Dundas , Bradley Gene Burgess , Jeff Rupley
IPC分类号： G06F9/38
CPC分类号： G06F9/3804 , G06F9/3844
摘要： A method and apparatus to utilize a fetching scheme for instructions in a processor to limit the expenditure of power caused by the speculative execution of branch instructions is provided. Also provided is a computer readable storage device encoded with data for adapting a manufacturing facility to create an apparatus. The method includes calculating a cumulative confidence measure based on one or more outstanding conditional branch instructions. The method also includes reducing prefetching operations in response to detecting that the cumulative confidence measure is below a first threshold level.
摘要翻译：提供了一种方法和装置，用于利用处理器中的指令的取出方案来限制由分支指令的推测性执行引起的功率消耗。还提供了一种用数据编码的计算机可读存储设备，用于使制造设备适配以创建设备。该方法包括基于一个或多个未完成的条件分支指令来计算累积置信度量度。响应于检测到累积置信度量度低于第一阈值水平，该方法还包括减少预取操作。

4. 发明授权

US09836304B2 Cumulative confidence fetch throttling 有权
公开(公告)号：US09836304B2
公开(公告)日：2017-12-05
申请号：US12946491
申请日：2010-11-15
申请人： Marvin Denman , James Dundas , Bradley Gene Burgess , Jeff Rupley
发明人： Marvin Denman , James Dundas , Bradley Gene Burgess , Jeff Rupley
IPC分类号： G06F9/38
CPC分类号： G06F9/3804 , G06F9/3844
摘要： A method and apparatus to utilize a fetching scheme for instructions in a processor to limit the expenditure of power caused by the speculative execution of branch instructions is provided. Also provided is a computer readable storage device encoded with data for adapting a manufacturing facility to create an apparatus. The method includes calculating a cumulative confidence measure based on one or more outstanding conditional branch instructions. The method also includes reducing prefetching operations in response to detecting that the cumulative confidence measure is below a first threshold level.

5. 发明授权

US08671269B2 Branch predictor accuracy by forwarding table updates to pending branch predictions 有权
标题翻译：通过将表更新转发到待分支预测来分支预测器的准确性
公开(公告)号：US08671269B2
公开(公告)日：2014-03-11
申请号：US12947206
申请日：2010-11-16
申请人： James David Dundas , Nikhil Gupta , Marvin Denman
发明人： James David Dundas , Nikhil Gupta , Marvin Denman
IPC分类号： G06F9/38
CPC分类号： G06F9/3844
摘要： A method and apparatus are provided for increasing the accuracy of a branch predictor. A branch prediction table provides a first instance of a branch prediction value associated with an instruction being speculatively executed a first time; and provides a second instance of the branch prediction value associated with the instruction being speculatively executed a second rime. The first instance of the branch prediction value may be subsequently revised after the instruction associated with the first instance of the branch prediction value is retired. Information regarding whether that branch instruction was accurately predicted may then be used to update the branch prediction table and the second instance of the branch prediction value.
摘要翻译：提供了一种用于提高分支预测器的精度的方法和装置。分支预测表提供与首次推测地执行的指令相关联的分支预测值的第一实例; 并且提供与被推测地执行第二霜的指令相关联的分支预测值的第二实例。在与分支预测值的第一实例相关联的指令退出之后，可以随后修改分支预测值的第一实例。然后可以使用关于该分支指令是否被准确预测的信息来更新分支预测表和分支预测值的第二实例。

6. 发明申请

US20120124348A1 BRANCH PREDICTOR ACCURACY BY FORWARDING TABLE UPDATES TO PENDING BRANCH PREDICTIONS 有权
标题翻译：分支预测准则通过转发表格更新到分支预测
公开(公告)号：US20120124348A1
公开(公告)日：2012-05-17
申请号：US12947206
申请日：2010-11-16
申请人： JAMES David DUNDAS , Nikhil Gupta , Marvin Denman
发明人： JAMES David DUNDAS , Nikhil Gupta , Marvin Denman
IPC分类号： G06F9/38
CPC分类号： G06F9/3844
摘要： A method and apparatus are provided for increasing the accuracy of a branch predictor. A branch prediction table provides a first instance of a branch prediction value associated with an instruction being speculatively executed a first time; and provides a second instance of the branch prediction value associated with the instruction being speculatively executed a second rime. The first instance of the branch prediction value may be subsequently revised after the instruction associated with the first instance of the branch prediction value is retired. Information regarding whether that branch instruction was accurately predicted may then be used to update the branch prediction table and the second instance of the branch prediction value.
摘要翻译：提供了一种用于提高分支预测器的精度的方法和装置。分支预测表提供与首次推测地执行的指令相关联的分支预测值的第一实例; 并且提供与被推测地执行第二霜的指令相关联的分支预测值的第二实例。在与分支预测值的第一实例相关联的指令退出之后，可以随后修改分支预测值的第一实例。然后可以使用关于该分支指令是否被准确预测的信息来更新分支预测表和分支预测值的第二实例。

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