Provided by: allegro5-doc_5.2.10.1+dfsg-1build1_all bug

NAME
       al_fixsqrt - Allegro 5 API


SYNOPSIS
              #include <allegro5/allegro.h>

              al_fixed al_fixsqrt(al_fixed x)


DESCRIPTION
       This  finds  out the non negative square root of x.  If x is negative, Allegro’s errno is set to EDOM and
       the function returns zero.

Allegro reference manual                                                                     al_fixsqrt(3alleg5)