ARM Assembly Instruction Set 1

The (assembly) instruction is a mnemonic of the CPU machine instruction, which is compiled to get a sequence of 0011 machine codes that can be executed by the CPU.

(assembler) The nature of the pseudo-directive is not an instruction (just written in the code together with the instruction), it is provided by the compiler environment, and is intended to guide the compilation process, after which the pseudo-instructions will not generate machine code at the end.

Two different styles of arm instructions

--arm official ARM compilation style: Directives are generally capitalized and IDE development environments in Windows (such as ads, MDK) are commonly used. such as: LDR R0,[R1]

--GNU Style arm assembly: Directives are generally used in lowercase letters and Linux. such as: Ldr R0,[R1]

ARM compilation

ARM Assembly Instruction Set 1