=> 0x7febe681bde6:	mov    (%r8),%eax
   0x7febe681bde9:	je     0x7febe681be30
   0x7febe681bdeb:	cmp    -0x8(%rcx),%rax
   0x7febe681bdef:	jae    0x7febe681be30
   0x7febe681bdf1:	movzbl (%rcx,%rax,1),%eax
   0x7febe681bdf5:	test   %eax,%eax
   0x7febe681bdf7:	je     0x7febe681be30
   0x7febe681bdf9:	mov    -0x8(%r8),%rdx
   0x7febe681bdfd:	sub    $0x1,%eax
   0x7febe681be00:	movslq %eax,%r9
   0x7febe681be03:	sub    $0x8,%rdx
   0x7febe681be07:	mov    %rdx,%rax
   0x7febe681be0a:	mul    %r10
   0x7febe681be0d:	shr    $0x4,%rdx
   0x7febe681be11:	cmp    %rdx,%r9
   0x7febe681be14:	jae    0x7febe681be30