[0x7f7fe8d19210]> db 0x00401396
[0x7f7fe8d19210]> dc
username:
12345678
serial number:
4444
hit breakpoint at: 401396
r_debug_select: 20071 1
[0x00401396]> dr? xmm1
---- x86-64 ----
 cwd = 0x1a28  ; control   swd = 0xa78b  ; status
ftw = 0x7f68              fop = 0x0000
rip = 0x00007f68a86a6921  rdp = 0x0000000002455c50
size = 0x00000200
xmm0 = 00000000 00000000 a88df6e0 00007f68   st0 =1.88e-316 (0x0000000002455c50) | 0.000 (02455c50)  | 0.000 (00000000)
xmm1 = 0230d6a0 00000000 000000d8 00000000   st1 =1.88e-316 (0x0000000002456ee0) | 0.000 (02456ee0)  | 0.000 (00000000)
[0x00401396]> ?v 4444
0x115c
[0x00401396]> pd 5 @ 0x00401390
       ,=< 0x00401390    7a24         jp 0x4013b6
       |   0x00401392    660f2ec1     ucomisd xmm0, xmm1
      ,   ;-- rip:
      ,==< 0x00401396 b  751e         jne 0x4013b6
      ||   0x00401398    beea154000   mov esi, str.s_n_OK_             ; "s/n OK!" @ 0x4015ea