=> 0x7f646f8775d6:	movlpd (%rdi),%xmm1
   0x7f646f8775da:	movlpd (%rsi),%xmm2
   0x7f646f8775de:	movhpd 0x8(%rdi),%xmm1
   0x7f646f8775e3:	movhpd 0x8(%rsi),%xmm2
   0x7f646f8775e8:	pxor   %xmm0,%xmm0
   0x7f646f8775ec:	pcmpeqb %xmm1,%xmm0
   0x7f646f8775f0:	pcmpeqb %xmm2,%xmm1
   0x7f646f8775f4:	psubb  %xmm0,%xmm1
   0x7f646f8775f8:	pmovmskb %xmm1,%edx
   0x7f646f8775fc:	sub    $0xffff,%edx
   0x7f646f877602:	jne    0x7f646f8787f0
   0x7f646f877608:	add    $0x10,%rsi
   0x7f646f87760c:	add    $0x10,%rdi
   0x7f646f877610:	and    $0xfffffffffffffff0,%rsi
   0x7f646f877614:	and    $0xfffffffffffffff0,%rdi
   0x7f646f877618:	mov    $0xffff,%edx