Question about assembly in x86-64.l

[C K Kashyap]

Hi,
I've made some progress with targeting nasm assembler -
https://github.com/ckkashyap/picoLisp/tree/nasm/src64. I am a little
confused by x86-64.l:776
(prinst "lea" "(5f-5b)(%r11)" "%r11") )
I don't see any any "5:" following this so what is the idea of using "5f" ?
Regards,
Kashyap