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CN104794067B 预测在堆栈中存储的变量的值的方法和设备 有权 转让

预测在堆栈中存储的变量的值的方法和设备
摘要：
描述了对堆栈中存储的变量的值进行预测的方法。当出现存储距所述堆栈指针偏移的地点中的堆栈中的变量的指令时，条目被添加到以下数据结构，该数据结构标识当前存储堆栈指针的物理寄存器、存储变量的值和偏移值的物理寄存器。随后，当出现从通过参照堆栈指针所标识的位置从堆栈中加载变量的指令时，搜索数据结构以看是否存在包括相同偏移和存储堆栈指针的相同物理寄存器的对应条目作为加载指令。如果找到对应条目，则加载指令中的虚拟寄存器被映射到存储来自条目的变量的值的物理寄存器。
摘要（英）：

Methods of predicting stack pointer values of variables stored in a stack are described. When an instruction is seen which stores a variable in the stack in a position offset from the stack pointer, an entry is added to a data structure which identifies the physical register which currently stores the stack pointer, the physical register which stores the value of the variable and the offset value. Subsequently when an instruction to load a variable from the stack from a position which is identified by reference to the stack pointer is seen, the data structure is searched to see if there is a corresponding entry which includes the same offset and the same physical register storing the stack pointer as the load instruction. If a corresponding entry is found the architectural register in the load instruction is mapped to the physical register storing the value of the variable from the entry.

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