DLAT2S(3)      LAPACK routine of NEC Numeric Library Collection      DLAT2S(3)



NAME
       DLAT2S

SYNOPSIS
       SUBROUTINE DLAT2S (UPLO, N, A, LDA, SA, LDSA, INFO)



PURPOSE
            DLAT2S converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE
            PRECISION triangular matrix, A.

            RMAX is the overflow for the SINGLE PRECISION arithmetic
            DLAS2S checks that all the entries of A are between -RMAX and
            RMAX. If not the convertion is aborted and a flag is raised.

            This is an auxiliary routine so there is no argument checking.




ARGUMENTS
           UPLO      (input)
                     UPLO is CHARACTER*1
                     = 'U':  A is upper triangular;
                     = 'L':  A is lower triangular.

           N         (input)
                     N is INTEGER
                     The number of rows and columns of the matrix A.  N >= 0.

           A         (input)
                     A is DOUBLE PRECISION array, dimension (LDA,N)
                     On entry, the N-by-N triangular coefficient matrix A.

           LDA       (input)
                     LDA is INTEGER
                     The leading dimension of the array A.  LDA >= max(1,N).

           SA        (output)
                     SA is REAL array, dimension (LDSA,N)
                     Only the UPLO part of SA is referenced.  On exit, if INFO=0,
                     the N-by-N coefficient matrix SA; if INFO>0, the content of
                     the UPLO part of SA is unspecified.

           LDSA      (input)
                     LDSA is INTEGER
                     The leading dimension of the array SA.  LDSA >= max(1,M).

           INFO      (output)
                     INFO is INTEGER
                     = 0:  successful exit.
                     = 1:  an entry of the matrix A is greater than the SINGLE
                           PRECISION overflow threshold, in this case, the content
                           of the UPLO part of SA in exit is unspecified.



LAPACK routine                  31 October 2017                      DLAT2S(3)