dlat2s.f(3)

dlat2s.f3

Usage

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.

Definition at line 110 of file dlat2s.f.

Releases

4 releases since Debian 7 (Wheezy); the text changed 3 times.

  1. 7
  2. 8
  3. 9
  4. Arch

Author

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