bits 64 movd r8d, mm1 movd r8, mm1 movq r8, mm1 movd [rax], mm1 movq [rax], mm1 movd dword [rax], mm1 ; movq dword [rax], mm1 movd qword [rax], mm1 movq qword [rax], mm1 ; movd mm2, mm1 movq mm2, mm1