=> 0x7f68b5920100 <g_type_check_instance_cast+16>:	mov    (%rdi),%rax
   0x7f68b5920103 <g_type_check_instance_cast+19>:	test   %rax,%rax
   0x7f68b5920106 <g_type_check_instance_cast+22>:	je     0x7f68b5920358 <g_type_check_instance_cast+616>
   0x7f68b592010c <g_type_check_instance_cast+28>:	mov    (%rax),%rdi
   0x7f68b592010f <g_type_check_instance_cast+31>:	cmp    $0x3fc,%rdi
   0x7f68b5920116 <g_type_check_instance_cast+38>:	ja     0x7f68b59201d0 <g_type_check_instance_cast+224>
   0x7f68b592011c <g_type_check_instance_cast+44>:	mov    %rdi,%rdx
   0x7f68b592011f <g_type_check_instance_cast+47>:	lea    0x21e5da(%rip),%rax        # 0x7f68b5b3e700
   0x7f68b5920126 <g_type_check_instance_cast+54>:	shr    $0x2,%rdx
   0x7f68b592012a <g_type_check_instance_cast+58>:	mov    (%rax,%rdx,8),%r9
   0x7f68b592012e <g_type_check_instance_cast+62>:	test   %r9,%r9
   0x7f68b5920131 <g_type_check_instance_cast+65>:	je     0x7f68b59201e0 <g_type_check_instance_cast+240>
   0x7f68b5920137 <g_type_check_instance_cast+71>:	movzbl 0x16(%r9),%eax
   0x7f68b592013c <g_type_check_instance_cast+76>:	and    $0x4,%eax
   0x7f68b592013f <g_type_check_instance_cast+79>:	cmp    $0x1,%al
   0x7f68b5920141 <g_type_check_instance_cast+81>:	sbb    %edx,%edx