dlat2s.f man page

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

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

dlat2s(3) is an alias of dlat2s.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK