redhat man page for dlasq5

DLASQ5(l)								 )								 DLASQ5(l)

NAME
       DLASQ5 - compute one dqds transform in ping-pong form, one version for IEEE machines another for non IEEE machines

SYNOPSIS
       SUBROUTINE DLASQ5( I0, N0, Z, PP, TAU, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2, IEEE )

	   LOGICAL	  IEEE

	   INTEGER	  I0, N0, PP

	   DOUBLE	  PRECISION DMIN, DMIN1, DMIN2, DN, DNM1, DNM2, TAU

	   DOUBLE	  PRECISION Z( * )

PURPOSE
       DLASQ5 computes one dqds transform in ping-pong form, one version for IEEE machines another for non IEEE machines.

ARGUMENTS
       I0    (input) INTEGER
	     First index.

       N0    (input) INTEGER
	     Last index.

       Z     (input) DOUBLE PRECISION array, dimension ( 4*N )
	     Z holds the qd array. EMIN is stored in Z(4*N0) to avoid an extra argument.

       PP    (input) INTEGER
	     PP=0 for ping, PP=1 for pong.

       TAU   (input) DOUBLE PRECISION
	     This is the shift.

       DMIN  (output) DOUBLE PRECISION
	     Minimum value of d.

	     DMIN1 (output) DOUBLE PRECISION Minimum value of d, excluding D( N0 ).

	     DMIN2 (output) DOUBLE PRECISION Minimum value of d, excluding D( N0 ) and D( N0-1 ).

       DN    (output) DOUBLE PRECISION
	     d(N0), the last value of d.

       DNM1  (output) DOUBLE PRECISION
	     d(N0-1).

       DNM2  (output) DOUBLE PRECISION
	     d(N0-2).

       IEEE  (input) LOGICAL
	     Flag for IEEE or non IEEE arithmetic.

LAPACK version 3.0						   15 June 2000 							 DLASQ5(l)