STOs string storage commands

STOs includes stosb stosw stosd. The registers involved are eax and EDI. The functions are as follows: stosb copies values in Al to byte ptr es: [EDI, at the same time, EDI ++ stosw copies the value in ax to word ptr es: [EDI], and EDI ++ stosd copies the value in eax to dword ptr es: [EDI, EDI ++ at the same time
Example: int A [0x22] = {0}; // The usual initialization method, but since memset function is called during assembly (there are many internal code ), therefore, the efficiency is low. _ ASM mov eax, 0xcc // useless code to prompt _ ASM mov eax, 0xcc // int B [0x33]; __asm // The following three Assembly statements are used to initialize array B, simple and efficient {XOR eax, eax Lea EDI, bmov ECx, 0x33rep stosd}

STOs string storage commands