DLAT2S(1) LAPACK PROTOTYPE auxiliary routine (version 3.1.2) DLAT2S(1)NAME
DLAT2S - converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE
PRECISION triangular matrix, A
SYNOPSIS
SUBROUTINE DLAT2S( UPLO, N, A, LDA, SA, LDSA, INFO )
CHARACTER UPLO
INTEGER INFO, LDA, LDSA, N
REAL SA( LDSA, * )
DOUBLE PRECISION A( LDA, * )
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 auxil‐
iary routine so there is no argument checking.
ARGUMENTS
UPLO (input) CHARACTER*1
= 'U': A is upper triangular;
= 'L': A is lower triangular.
N (input) INTEGER
The number of rows and columns of the matrix A. N >= 0.
A (input) DOUBLE PRECISION array, dimension (LDA,N)
On entry, the N-by-N triangular coefficient matrix A.
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,N).
SA (output) 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) INTEGER
The leading dimension of the array SA. LDSA >= max(1,M).
INFO (output) INTEGER
= 0: successful exit.
= 1: an entry of the matrix A is greater than the SINGLE PRE‐
CISION overflow threshold, in this case, the content of the
UPLO part of SA in exit is unspecified. ========= End of
DLAT2S
LAPACK PROTOTYPE auxiliary routiNovemberi2008.1.2) DLAT2S(1)
