The only available mechanisms to permit non-sequential execution on a CPU is the use of (conditional) "jump" or "branch" instructions that explicitly set the program counter to an arbitrary address. If/else, for, and while loops are called "block structured" control flow statements because they explicitly control whether (or how often) a "block" of code is executed. Control-flow statements provide the ability to execute statements in non-sequential order.
The translation of these sructures to assembly language can be non-trivial and error-prone.Ī technique to simplify this process through the reduction of block-structured primitives to (conditinal) GOTOs is also presented.Ĭontrol flow refers to the order that statements or instructions are executed.
0 kommentar(er)
