何谓 name lookup
C 中很重要的一个概念:name lookup。 当编译器在遇到一个 name 的时候, 会做查找(lookup),会把引入这个 name 的声明和它关联起来,具体来说,又包含两种类型的 lookup…
Holds PE status and control information. 保存PE状态和控制信息。 N, bit [31] Negative condition flag. Set to bit[31] of the result of the last flag-setting instruction. If the result is regarded as a twos complement signed integer, then N is set to 1 if…