装配MMX夏天 - pshufw - 错误A2085

Question

我正在使用visual studio 2005练习编写一些汇编代码。我使用.mmx编写了一个简单的函数。

这是完整的文件

        .586
    .mmx
    .model flat,c
    .code

Sum_ proc
    ; Sun_(unsigned short int*, number) 

    ;Pre Setup
    push ebp
    mov ebp, esp
    push esi
    push ebx

    ; Get the number of values to sum
    mov ecx, [ebp+12]; ecx = number
    xor eax, eax ; eax = 0

    ; Get data array to sum
    mov esi, [ebp+8]

    ; Set mm0 to 0
    movd mm0, eax   

@@:
    add eax, 4

    ; See if the system exceeds the number
    cmp eax, ecx
    jg @f

    ; process through mmx
    movq mm1, [esi + eax - 4]
    paddsw mm0, mm1
    jmp @b

@@:
    ; Clear some registers
    pxor mm1, mm1
    pxor mm2, mm2

    ; Unpack and sum
    punpckhwd mm1, mm0
    punpcklwd mm2, mm0
    paddd mm2, mm1

    ; Clear some registers
    pxor mm0, mm0
    pxor mm1, mm1

    punpckldq mm0, mm2
    punpckhdq mm1, mm2
    paddd mm0, mm1

    pshufw mm4, mm0, 00011011b ; Retreive the summed value
    movd edx, mm4

    ; Add the remaining values
    sub eax, 3
@@: cmp eax, ecx
    jge @f
    xor ebx, ebx
    mov bx, word ptr [esi + eax]
    add edx, ebx
    inc eax
    add edx, ebx
    jmp @b

@@: 
    mov eax, edx

    ; Return
    emms
    pop ebx
    pop esi
    pop ebp
    ret
Sum_ endp

    end

在线：pshufw mm4, mm0, 00011011b ; Retreive the summed value我收到以下错误：

Error 1 error A2085: instruction or register not accepted in current CPU mode

我知道命令有效。任何人都可以告诉我如何解决此错误。