conditional branch

conditional branch的基本解释

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条件转移, 条件跳变

与conditional branch相关的网络例句 [注：此内容来源于网络，仅供参考]

Based on a lot of experiment results, a conclusion is drawn: comparing with other factors, the performance of branch handling strategy is the key limits of processor to exploit the instruction level parallelism existed in nonscientific code, cache miss have severe effect on superscalar processor's performance when it runs scientific code. Second, in order to reduce the branch penalty and improve the performance of superscalar processor, a new branch handling strategy—a classification based hierarchical branch handling strategy, CHBHS is proposed. It first expands the traditional processor architecture to support multiple condition code, conditional execution and Mbranch instruction, as a result, compiler can reduce the number of static conditional branch when the code is generated. Then, CHBHS tries to use the best suitable mechanism to deal with different branch base on their different behavior. CHBHS can predict the target address of unconditional branch, subroutine call and conditional branch by buffering their target address in branch target buffer, a newly proposed high efficient return address stack is used to reduce the penalty of subroutine return instruction, a new Counter Register Stack is also proposed to reduce the penalty of loop-closing branch to zero, and dynamic branch predictor is incorporate with branch target buffer to predict the outcome of conditional branch.

基于上述结论，为了尽量消除转移指令对处理器开发指令级并行性能力的影响，进一步提高处理器性能，在详尽分析目前已存在的转移处理策略的特点与局限性的基础上，首次提出了一种新的转移处理策略即基于分类的层次转移处理策略CHBHS(Classification Based Hierarchical Branch Handling Strategy)，它首先通过扩展传统的体系结构，支持多条件码、条件式执行及多分支转移技术，以使编译程序在进行代码生成时可尽量少生成条件转移指令，从而减少静态条件转移指令的数目；其次，基于不同的转移指令的行为不同这一事实，提出了对不同的转移指令采用不同的机制进行处理的思想，即对无条件转移指令和函数调用指令以及条件转移指令的目标地址，采用转移目标缓冲器来预测，对于函数返回指令，采用所提出一种的高效返回地址栈来预测其目标地址，对于大多数循环控制转移指令，采用所提出的Counter Register Stack来将其所可能带来的损失减少为0，对于其他的条件转移指令采用动态预测机制来预测其方向。

First of all, in two-way conditionals the conditional branch points to the 'else'block and not to the code that follows the conditional statement.

第一，在双条件分支中指向else 语句块的条件分支指针并不是紧跟在条件声明之后的。

By reformulating each pass in the original algorithm into two sub-passes, we make the new algorithm suitable to be implemented on GPU. Additionally, we reduce the number of the conditional branch instructions involved in the improved algorithm, taking advantage that there are a large number of similar conditional branch instructions between two sub-passes.

我们对原算法进行细化，将每一次迭代分为两次子迭代，以满足GPU中并行处理的要求，并进一步在子迭代中减少条件判断的次数。

与conditional branch相关的网络解释 [注：此内容来源于网络，仅供参考]

conditional branch instruction：条件转移指令

跟在这类指令之后的条件转移指令(conditional branch instruction)是否执行转移,取决于这些标志的设置. 使用运算指令操作这些标志,就可检查一个数A与另一个数B之间的大小关系. 当被检查的数为8位的数时,不存在什么问题,因为所有标志都依赖一条指令设置的标志值.

conditional branch instruction：条件转移命令

conditional branch 条件转移 | conditional branch instruction 条件转移命令 | conditional code 条件符号

conditional break point instruction：条件断点指令

conditional branch | 条件转移, 条件跳变 | conditional break point instruction | 条件断点指令 | conditional conjunction | 条件合取