m_apm_reciprocal
extern void m_apm_reciprocal(M_APM, int, M_APM);
m_apm_reciprocal(MM_lc_log10R, dplaces, MM_lc_log10); /* 1 / log(10) */
m_apm_reciprocal(rr, places, tmp4);
m_apm_reciprocal(tmp0, (dplaces + 8), bb);
m_apm_reciprocal(tmp2, local_precision, tmp1);
m_apm_reciprocal(tmp2, local_precision, tmp1);
m_apm_reciprocal(tmp2, local_precision, tmp1);
m_apm_reciprocal(rr, places, tmpy);