dlat2s.f(3)

NAME
dlat2s.f -

SYNOPSIS

  Functions/Subroutines
subroutine dlat2s (UPLO, N, A, LDA, SA, LDSA, INFO)
DLAT2S converts a double-precision triangular matrix to a single-precision triangular matrix.

Function/Subroutine Documentation

  subroutine dlat2s (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, real, dimension( ldsa, * )SA, integerLDSA, integerINFO)

DLAT2S converts a double-precision triangular matrix to a single-precision triangular matrix.

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.

Parameters:
    UPLO

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

    N

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

    A

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

    LDA

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

    SA

              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

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

    INFO

              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.

Author:
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Date:
    September 2012

Definition at line 112 of file dlat2s.f.

Author

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