ref: d5f2d2cc3fc7c2d3701e906df5d2d53781c4ee9c
dir: /sys/src/libmp/test/fns.h/
ldint* ldnew(int); void ldfree(ldint *); void testgen(int, ldint *); int ldmpeq(ldint *, mpint *); mpint* ldtomp(ldint *, mpint *); void mptarget(mpint *); void tests(void); void mpdiv_(mpint *, mpint *, mpint *, mpint *);