LAPACK  3.5.0
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lapacke_ssptrs_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_ssptrs_work (int matrix_order, char uplo, lapack_int n, lapack_int nrhs, const float *ap, const lapack_int *ipiv, float *b, lapack_int ldb)

Function/Subroutine Documentation

lapack_int LAPACKE_ssptrs_work ( int  matrix_order,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const float *  ap,
const lapack_int ipiv,
float *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_ssptrs_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_ssptrs( &uplo, &n, &nrhs, ap, ipiv, b, &ldb, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldb_t = MAX(1,n);
float* b_t = NULL;
float* ap_t = NULL;
/* Check leading dimension(s) */
if( ldb < nrhs ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_ssptrs_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
if( b_t == NULL ) {
goto exit_level_0;
}
ap_t = (float*)
LAPACKE_malloc( sizeof(float) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
if( ap_t == NULL ) {
goto exit_level_1;
}
/* Transpose input matrices */
LAPACKE_sge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
LAPACKE_ssp_trans( matrix_order, uplo, n, ap, ap_t );
/* Call LAPACK function and adjust info */
LAPACK_ssptrs( &uplo, &n, &nrhs, ap_t, ipiv, b_t, &ldb_t, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
/* Release memory and exit */
LAPACKE_free( ap_t );
exit_level_1:
LAPACKE_free( b_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_ssptrs_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_ssptrs_work", info );
}
return info;
}

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