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    • 4. 发明申请
    • METHOD, APPARATUS, AND SYSTEM FOR TRANSACTIONAL SPECULATION CONTROL INSTRUCTIONS
    • 方法,装置和系统的交互式分析控制指令
    • US20140379996A1
    • 2014-12-25
    • US13997245
    • 2012-02-02
    • Ravi RajwarMartin G. DixonKonrad K. LaiRobert S. ChappellBret L. Toll
    • Ravi RajwarMartin G. DixonKonrad K. LaiRobert S. ChappellBret L. Toll
    • G06F9/52G06F12/08G06F9/46
    • An apparatus and method is described herein for providing speculative escape instructions. Specifically, an explicit non-transactional load operation is described herein. During execution of a speculative code region (e.g. a transaction or critical section) loads are normally tracked in a read set. However, a programmer or compiler may utilize the explicit non-transactional read to load from a memory address into a destination register, while not adding the read/load to the transactional read set. Similarly, a non-transactional store is also provided. Here, a transactional store is performed and not added to a write set during speculative code execution. And the store may be immediately globally visible and/or persistent (even after an abort of the speculative code region). In other words, speculative escape operations are provided to ‘escape’ a speculative code region to perform non-transactional memory accesses without causing the speculative code region to abort or fail.
    • 这里描述了一种用于提供推测逃逸指令的装置和方法。 具体地,本文描述了显式的非事务性加载操作。 在推测性代码区域(例如交易或关键部分)的执行期间,通常在读取集合中跟踪负载。 然而,程序员或编译器可以利用显式的非事务性读取从存储器地址加载到目标寄存器中,而不将读取/加载添加到事务读取集合。 同样,也提供非事务存储。 这里,在推测性代码执行期间执行事务存储并且不添加到写入集合。 并且商店可能立即全局可见和/或持久(即使在推测性代码区域中止之后)。 换句话说,提供推测性逃避操作以“逃逸”推测性代码区域以执行非事务性存储器访问,而不会导致推测性代码区域中止或失败。