Scm_BignumCmp3U  2060 src/gauche.h   SCM_EXTERN int    Scm_BignumCmp3U(ScmBignum *bx, ScmBignum *off, ScmBignum *by);
Scm_BignumCmp3U  1924 src/number.c       return Scm_BignumCmp3U(SCM_BIGNUM(bx), SCM_BIGNUM(bd), SCM_BIGNUM(by));