al_fixfloor - Allegro 5 API

       Returns the greatest integer not greater than x.  That is, it rounds towards negative infinity.

       Example:

              int result;

              /* This will put 33 into `result'. */
              result = al_fixfloor(al_itofix(100) / 3);

              /* And this will round down to 16. */
              result = al_fixfloor(al_itofix(100) / 6);

       al_fixfloor - Allegro 5 API

al_fixtoi(3alleg5), al_fixceil(3alleg5).

Allegro reference manual                                                                    al_fixfloor(3alleg5)

              #include <allegro5/allegro.h>

              int al_fixfloor(al_fixed x);