lat2c

Functions

void zlat2c(
    const char*          uplo,
    const INT            n,
    const c128* restrict A,
    const INT            lda,
          c64*  restrict SA,
    const INT            ldsa,
          INT*           info
);

void zlat2c(const char *uplo, const INT n, const c128 *restrict A, const INT lda, c64 *restrict SA, const INT ldsa, INT *info)

ZLAT2C converts a COMPLEX*16 triangular matrix, A, to a COMPLEX triangular matrix, SA.

RMAX is the overflow for the SINGLE PRECISION arithmetic. ZLAT2C 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

uplo

Specifies whether the matrix A is upper or lower triangular. = ‘U’: Upper triangular = ‘L’: Lower triangular

in

n

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

in

A

Complex*16 array, dimension (lda, n). On entry, the N-by-N triangular coefficient matrix A.

in

lda

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

out

SA

Complex (single precision) 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.

in

ldsa

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

out

info

Exit status:

• = 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.