compilation error in function returning a struct in C -

i keep getting compilation error:

error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token

on marked line below:

//128 bit vector struct (4 integers) typedef struct {   int w, x, y, z; } ivector4;  ivector4 sseadd(ivector4 &v1, ivector4 &v2)  // <-- line {   ivector4 vr;   asm   {     mov eax v1     mov ebx v2     //     movups xmm0, [eax]     movups xmm1, [ebx]     //     paddd xmm0 xmm1     movups [rv]   }   return rv; } 

i can't see what's wrong: seems problem?

edit:

hi responses.

i'm using gcc compiler, , realize assembly code had provided incorrect.i wondering if best use built_in functions -msse/-msse2.

also, what's efficient way load , extract values vector such v4si?

i'm finding loading , extracting vector costly ooperation.

when sse intrinsics, did mean?

thanks help.

c not have references. need compile c++ those.