=> 0x7fa5de757b97:	push   %rbx
   0x7fa5de757b98:	xor    %ebx,%ebx
   0x7fa5de757b9a:	mov    %rdi,%r12
   0x7fa5de757b9d:	sub    $0x18,%rsp
   0x7fa5de757ba1:	mov    0x10(%rdi),%rcx
   0x7fa5de757ba5:	mov    %fs:0x28,%rax
   0x7fa5de757bae:	mov    %rax,0x8(%rsp)
   0x7fa5de757bb3:	xor    %eax,%eax
   0x7fa5de757bb5:	lea    0x7(%rsp),%r13
   0x7fa5de757bba:	lea    -0x1(%rcx,%rsi,1),%rax
   0x7fa5de757bbf:	div    %rsi
   0x7fa5de757bc2:	imul   %rsi,%rax
   0x7fa5de757bc6:	mov    %rax,%rbp
   0x7fa5de757bc9:	sub    %rcx,%rbp
   0x7fa5de757bcc:	je     0x7fa5de757bf0
   0x7fa5de757bce:	xchg   %ax,%ax