Provided by: liblapack-doc_3.3.1-1_all
LAPACK-3 - converts a DOUBLE PRECISION matrix, SA, to a SINGLE PRECISION matrix, A
SUBROUTINE DLAG2S( M, N, A, LDA, SA, LDSA, INFO ) INTEGER INFO, LDA, LDSA, M, N REAL SA( LDSA, * ) DOUBLE PRECISION A( LDA, * )
DLAG2S converts a DOUBLE PRECISION matrix, SA, to a SINGLE PRECISION matrix, A. RMAX is the overflow for the SINGLE PRECISION arithmetic DLAG2S 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.
M (input) INTEGER The number of lines of the matrix A. M >= 0. N (input) INTEGER The number of columns of the matrix A. N >= 0. A (input) DOUBLE PRECISION array, dimension (LDA,N) On entry, the M-by-N coefficient matrix A. LDA (input) INTEGER The leading dimension of the array A. LDA >= max(1,M). SA (output) REAL array, dimension (LDSA,N) On exit, if INFO=0, the M-by-N coefficient matrix SA; if INFO>0, the content 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 PRECISION overflow threshold, in this case, the content of SA in exit is unspecified. LAPACK PROTOTYPE auxiliary routine (versionApril12011 DLAG2S(3lapack)