dlat2s.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
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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 (character UPLO, integer N, double precision, dimension( lda, * ) A, integer LDA, real, dimension( ldsa, * ) SA, integer LDSA, integer INFO)

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 conversion 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:

December 2016

Definition at line 113 of file dlat2s.f.  

Author

Generated automatically by Doxygen for LAPACK from the source code.


 

Index

NAME
SYNOPSIS
Functions/Subroutines
Function/Subroutine Documentation
subroutine dlat2s (character UPLO, integer N, double precision, dimension( lda, * ) A, integer LDA, real, dimension( ldsa, * ) SA, integer LDSA, integer INFO)
Author
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