Machine Instructions areCPUThe instructions that can be directly recognized and executed areBinary encoding。Machine commands are usuallyOperation codeandOperandsIt consists of two parts. The operation code indicates the operation to be completed by the instruction, that isinstructionsThe operands indicate the objects involved in the operation and the location where the operation results are stored.
Chinese name
Machine commands
Foreign name
MachineInstructions
The machine command isCPUThe instructions that can be directly recognized and executed areBinary encoding。Machine commands are usuallyOperation codeandOperandsIt consists of two parts. The operation code indicates the operation to be completed by the instruction, that is, the function of the instruction. The operands indicate the objects involved in the operation, and the location where the operation results are stored.[1]
Since machine instructions are closely related to CPU, different types of CPU have different machine instructions, and theirCommand systemThey often differ greatly.But for the same series of CPUs, in order to meet the requirements of goodcompatibility, to achieve: new generation CPUCommand systemMust includeCommand system。Only in this way can all kinds of programs previously developed run normally on the new generation CPU.
machine languageIt is used to directly describe machine instructions, rules for using machine instructions, etc.It is the only language that the CPU can directly recognize, that is, the CPU can directly executemachine languageProcedure described.
usemachine languageProgramming is the work of professional and technical personnel who have been strictly trained in the early stageprogrammerGenerally, they are not competent, and the programs written in machine language are not easy to read, have high error rate, and are difficult to maintain, and cannot intuitively reflect the basic idea of solving problems with computers.
Because of the use ofmachine languageThere are so many inconveniences in programming that few programmers write programs like this.
