错误C2400：“第二个操作数”中的内联汇编语法错误； 找到“注册”

Question

I am facing compilation error while working with assembly instructions in VC++ as MACRO inline based assembler blocks.

error C2400: inline assembler syntax error in 'second operand'; found 'register'

Here is the code:

_asm {\

        mov esi,dword ptr [pMemBlock]\
        sub esp,sizeOfblock\
        mov ebx,sizeOfblock\
        mov shrResult,ebx\
        shr shrResult,2\
        mov ecx,shrResult\
        mov shrResult,0\
        mov edi,esp\
        rep movs dword ptr es:[edi],dword ptr[esi]\
}

Regards Usman

Answer 1

That blank line after the _asm { line will complete the macro. It should be deleted or have \\ on it.

Answer 2

It should be

_asm {\
    __asm mov esi,dword ptr [pMemBlock]\
    __asm sub esp,sizeOfblock\
    ...

See this msdn page .