说明：  在 ARM 汇编语言程序里，有一些特殊指令助记符，这些助记符与指令系统的助记符不同，没有相对应的操作码，通常称这些特殊指令助记符为伪指令，他们所完成的操作称为伪操作。伪指令在源程序中的作用是为完成汇编程序作各种准备工作的，这些伪指令仅在汇编过程中起作用，一旦汇编结束，伪指令的使命就完成。
(In ARM assembly language program, there are some special instruction mnemonic, the mnemonic with the instruction mnemonic system, there is no corresponding opcode is usually said that these special instruction Mnemonic for the pseudo-instruction, they completed operation known as the pseudo-operation. Pseudo-instruction in the role of source code is compiled for the completion of procedures for the various preparations, these pseudo-instruction only play a role in the compilation process, once the compilation of the end of pseudo-instructions to complete the mission.)