_lag2_

Functions

void dlag2s(
    const INT             m,
    const INT             n,
    const f64*   restrict A,
    const INT             lda,
          float* restrict SA,
    const INT             ldsa,
          INT*            info
);

void dlag2s(const INT m, const INT n, const f64 *restrict A, const INT lda, float *restrict SA, const INT ldsa, INT *info)

DLAG2S converts a DOUBLE PRECISION matrix, A, to a SINGLE PRECISION matrix, SA.

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 conversion is aborted and a flag is raised.

This is an auxiliary routine so there is no argument checking.

Parameters

in

m

The number of lines of the matrix A. m >= 0.

in

n

The number of columns of the matrix A. n >= 0.

in

A

Double precision array, dimension (lda, n). On entry, the M-by-N coefficient matrix A.

in

lda

The leading dimension of the array A. lda >= max(1, m).

out

SA

Real (single precision) 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.

in

ldsa

The leading dimension of the array SA. ldsa >= max(1, m).

out

info

Exit status:

• = 0: successful exit.

• > 0: if info = 1, an entry of the matrix A is greater than the SINGLE PRECISION overflow threshold, in this case, the content of SA is unspecified.