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    METHOD, APPARATUS, AND SYSTEM FOR TRANSACTIONAL SPECULATION CONTROL INSTRUCTIONS
    1.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR TRANSACTIONAL SPECULATION CONTROL INSTRUCTIONS 审中-公开
    方法，装置和系统的交互式分析控制指令

    公开(公告)号：US20150032998A1

    公开(公告)日：2015-01-29

    申请号：US13997243

    申请日：2012-02-02

    申请人： Ravi Rajwar ,  Martin G. Dixon ,  Konrad K. Lai ,  Alexandre J. Farcy ,  Bret L. Toll ,  Robert S. Chappell ,  Matthew C. Merten ,  Rajesh S. Parthasarathy ,  Per Hammarlund

    发明人： Ravi Rajwar ,  Martin G. Dixon ,  Konrad K. Lai ,  Alexandre J. Farcy ,  Bret L. Toll ,  Robert S. Chappell ,  Matthew C. Merten ,  Rajesh S. Parthasarathy ,  Per Hammarlund

    IPC分类号： G06F9/30

    CPC分类号： G06F9/30181 ,  G06F9/3004 ,  G06F9/30087 ,  G06F9/30145 ,  G06F9/3834 ,  G06F9/3851 ,  G06F9/3859

    摘要： An apparatus and method is described herein for providing speculation control instructions. An xAcquire and xRelease instruction are provided to define a critical section. In one embodiment, the xAcquire instruction includes a lock instruction with an elision prefix and the xRelease instruction includes a lock release instruction with an elision prefix. As a result, a processor is able to elide locks and transactionally execute a critical section defined in software by xAcquire and xRelease. But by adding only prefix hints, legacy processor are able to execute the same code by just ignoring the hints and executing the critical section traditionally with locks to guarantee mutual exclusion. Moreover, xBegin and xEnd are similarly provided for in an Instruction Set Architecture (ISA) to define a transactional code region. In addition, other control speculation instructions, such as xAbort to enable explicit abort of a critical or transactional code section and xTest to test a state of speculative execution is also provided in the ISA.

    摘要翻译： 这里描述了一种用于提供猜测控制指令的装置和方法。 提供xAcquire和xRelease指令来定义关键部分。 在一个实施例中，xAcquire指令包括具有检验前缀的锁定指令，并且xRelease指令包括具有检验前缀的锁定释放指令。 因此，处理器能够通过xAcquire和xRelease来删除锁定和事务性地执行在软件中定义的关键部分。 但是通过仅添加前缀提示，传统处理器能够通过忽略提示并执行传统的锁定关键部分来保证互斥，从而执行相同的代码。 此外，xBegin和xEnd在指令集架构（ISA）中类似地提供以定义事务代码区域。 此外，还在ISA中提供了其他控制推测指令，例如xAbort，以实现关键或事务代码段的显示中止，以及xTest测试推测执行状态。

    PROCESSOR WITH SECOND JUMP EXECUTION UNIT FOR BRANCH MISPREDICTION
    4.
    发明申请
    PROCESSOR WITH SECOND JUMP EXECUTION UNIT FOR BRANCH MISPREDICTION 审中-公开
    具有分支机构错误预测的第二个执行单元的处理程序

    公开(公告)号：US20140195790A1

    公开(公告)日：2014-07-10

    申请号：US13994676

    申请日：2011-12-28

    申请人： Matthew C. Merten ,  Avinash Sodani ,  Sean P. Mirkes ,  Vijaykumar B. Kadgi ,  Bambang Sutanto ,  Chia Yin Kevin Lai ,  Morris Marden ,  Alexandre J. Farcy

    发明人： Matthew C. Merten ,  Avinash Sodani ,  Sean P. Mirkes ,  Vijaykumar B. Kadgi ,  Bambang Sutanto ,  Chia Yin Kevin Lai ,  Morris Marden ,  Alexandre J. Farcy

    IPC分类号： G06F9/38

    CPC分类号： G06F9/3844 ,  G06F9/3851 ,  G06F9/3861 ,  G06F9/3867 ,  G06F9/3885

    摘要： A secondary jump execution unit (JEU) is incorporated in a micro-processor to operate concurrently with a primary JEU, enabling the execution of simultaneous branch operations with possible detection of multiple branch mispredicts. When branch operations are executed on both JEUs in a same instruction cycle, mispredict processing for the secondary JEU is skidded into the primary JEU's dispatch pipeline such that the branch processing for the secondary JEU occurs after processing of the branch for the primary JEU and while the primary JEU is not processing a branch. Moreover, in cases when a nuke command is also received from a reorder buffer of the processor, the branch processing for the secondary JEU is further delayed to accommodate processing of the nuke on the primary JEU. Further embodiments support the promotion of the secondary JEU to have access to the mispredict mechanisms of the primary JEU in certain circumstances.

    摘要翻译： 次级跳转执行单元（JEU）并入微处理器以与主JEU同时操作，使得能够执行同时分支操作，并可能检测到多个分支错误预测。 当在同一个指令周期中对两个JEU执行分支操作时，辅助JEU的错误预测处理被划分到主JEU的调度流水线中，使得辅助JEU的分支处理在主JEU的分支处理之后发生，而 初级JEU不处理分支。 此外，在从处理器的重新排序缓冲器接收到nuke命令的情况下，进一步延迟用于辅助JEU的分支处理，以适应主JEU上的nuke的处理。 进一步的实施方案支持促进联合联合国次级方案在某些情况下获得主要联合执行机构的错误预测机制。

    ENHANCED LOOP STREAMING DETECTOR TO DRIVE LOGIC OPTIMIZATION
    5.
    发明申请
    ENHANCED LOOP STREAMING DETECTOR TO DRIVE LOGIC OPTIMIZATION 有权
    增强环路检测器驱动逻辑优化

    公开(公告)号：US20140189306A1

    公开(公告)日：2014-07-03

    申请号：US13728273

    申请日：2012-12-27

    申请人： Matthew C. Merten ,  Justin M. Deinlein ,  Yury N. Ilin ,  Alexandre J. Farcy ,  Tong Li ,  Srikanth T. Srinivasan

    发明人： Matthew C. Merten ,  Justin M. Deinlein ,  Yury N. Ilin ,  Alexandre J. Farcy ,  Tong Li ,  Srikanth T. Srinivasan

    IPC分类号： G06F9/30

    CPC分类号： G06F9/30065 ,  G06F1/3243 ,  G06F1/3287 ,  G06F9/3836 ,  G06F9/3885

    摘要： An enhanced loop streaming detection mechanism is provided in a processor to reduce power consumption. The processor includes a decoder to decode instructions in a loop into micro-operations, and a loop streaming detector to detect the presence of the loop in the micro-operations. The processor also includes a loop characteristic tracker unit to identify hardware components downstream from the decoder that are not to be used by the micro-operations in the loop, and to disable the identified hardware components. The processor also includes execution circuitry to execute the micro-operations in the loop with the identified hardware components disabled.

    摘要翻译： 在处理器中提供增强的循环流检测机制以降低功耗。 处理器包括解码器，用于将循环中的指令解码为微操作，以及循环流检测器，用于检测微操作中环路的存在。 处理器还包括循环特性跟踪器单元，用于识别解码器下游的不被循环中的微操作使用的硬件组件，以及禁用所识别的硬件组件。 该处理器还包括执行电路，以在所识别的硬件组件被禁用的情况下执行循环中的微操作。

    Enhanced loop streaming detector to drive logic optimization
    6.
    发明授权
    Enhanced loop streaming detector to drive logic optimization 有权
    增强循环流检测器驱动逻辑优化

    公开(公告)号：US09354875B2

    公开(公告)日：2016-05-31

    申请号：US13728273

    申请日：2012-12-27

    申请人： Matthew C. Merten ,  Justin M. Deinlein ,  Yury N. Ilin ,  Alexandre J. Farcy ,  Tong Li ,  Srikanth T. Srinivasan

    发明人： Matthew C. Merten ,  Justin M. Deinlein ,  Yury N. Ilin ,  Alexandre J. Farcy ,  Tong Li ,  Srikanth T. Srinivasan

    IPC分类号： G06F9/30

    CPC分类号： G06F9/30065 ,  G06F1/3243 ,  G06F1/3287 ,  G06F9/3836 ,  G06F9/3885

    摘要： An enhanced loop streaming detection mechanism is provided in a processor to reduce power consumption. The processor includes a decoder to decode instructions in a loop into micro-operations, and a loop streaming detector to detect the presence of the loop in the micro-operations. The processor also includes a loop characteristic tracker unit to identify hardware components downstream from the decoder that are not to be used by the micro-operations in the loop, and to disable the identified hardware components. The processor also includes execution circuitry to execute the micro-operations in the loop with the identified hardware components disabled.

    摘要翻译： 在处理器中提供增强的循环流检测机制以降低功耗。 处理器包括解码器，用于将循环中的指令解码为微操作，以及循环流检测器，用于检测微操作中环路的存在。 处理器还包括循环特性跟踪器单元，用于识别解码器下游的不被循环中的微操作使用的硬件组件，以及禁用所识别的硬件组件。 该处理器还包括执行电路，以在所识别的硬件组件被禁用的情况下执行循环中的微操作。

    Forward-pass dead instruction identification and removal at run-time
    7.
    发明授权
    Forward-pass dead instruction identification and removal at run-time 失效
    在运行时前进死亡指令识别和删除

    公开(公告)号：US08291196B2

    公开(公告)日：2012-10-16

    申请号：US11323037

    申请日：2005-12-29

    申请人： Stephan J. Jourdan ,  Matthew C. Merten ,  Alexandre J. Farcy

    发明人： Stephan J. Jourdan ,  Matthew C. Merten ,  Alexandre J. Farcy

    IPC分类号： G06F9/00

    CPC分类号： G06F9/3832 ,  G06F9/3838

    摘要： Apparatuses and methods for dead instruction identification are disclosed. In one embodiment, an apparatus includes an instruction buffer and a dead instruction identifier. The instruction buffer is to store an instruction stream having a single entry point and a single exit point. The dead instruction identifier is to identify dead instructions based on a forward pass through the instruction stream.

    摘要翻译： 公开了用于死指示识别的装置和方法。 在一个实施例中，一种装置包括指令缓冲器和死指令标识符。 指令缓冲器用于存储具有单个入口点和单个出口点的指令流。 死指令标识符是基于通过指令流的向前传递来识别死指令。