bidiagonal reduction code function matching
DGEQRT --- LQR1 DTSQRT --- LQR2 DLARTB --- LUP1 DSSRFT --- LUP2
DGEQRT --- RQR1 DTSQRT --- RQR2 DLARTB --- RUP1 DSSRFT --- RUP2
DGEQRT --- LQR1 DTSQRT --- LQR2 DLARTB --- LUP1 DSSRFT --- LUP2
DGEQRT --- RQR1 DTSQRT --- RQR2 DLARTB --- RUP1 DSSRFT --- RUP2