m64SymmetricDivI
INTQR m64SymmetricDivI(DPINT num, FICL_INT den);
qr = m64SymmetricDivI(n1, n2);
qr = m64SymmetricDivI(d1, n1);
qr = m64SymmetricDivI(d1, n1);
x = m64SymmetricDivI(prod, z).quot;
qr = m64SymmetricDivI(prod, z);