magnitude
#define diff(magnitude) (a->fp_sign ? opposite_cc(magnitude) : (magnitude))
#define diff(magnitude) (a->fp_sign ? opposite_cc(magnitude) : (magnitude))
magnitude(input, t->pos->dx, t->pos->dy) >= MAG_MEDIUM))
if (magnitude(input, t->pos->dx, t->pos->dy) > MAG_LOW
|| magnitude(input, pos->dx, pos->dy) < MAG_MEDIUM)
mag = magnitude(input, *dx, *dy);
if (magnitude(input, t->pos->dx, t->pos->dy) > MAG_MEDIUM)
magnitude(input, dx, dy), cmds);
wstpad_scroll(tp, dx, dy, magnitude(input, dx, dy), cmds);