LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_sgerfs_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_sgerfs_work (int matrix_order, char trans, lapack_int n, lapack_int nrhs, const float *a, lapack_int lda, const float *af, lapack_int ldaf, const lapack_int *ipiv, const float *b, lapack_int ldb, float *x, lapack_int ldx, float *ferr, float *berr, float *work, lapack_int *iwork)

Function/Subroutine Documentation

lapack_int LAPACKE_sgerfs_work ( int  matrix_order,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const float *  a,
lapack_int  lda,
const float *  af,
lapack_int  ldaf,
const lapack_int ipiv,
const float *  b,
lapack_int  ldb,
float *  x,
lapack_int  ldx,
float *  ferr,
float *  berr,
float *  work,
lapack_int iwork 
)

Definition at line 36 of file lapacke_sgerfs_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_sgerfs( &trans, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b, &ldb, x,
&ldx, ferr, berr, work, iwork, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int lda_t = MAX(1,n);
lapack_int ldaf_t = MAX(1,n);
lapack_int ldb_t = MAX(1,n);
lapack_int ldx_t = MAX(1,n);
float* a_t = NULL;
float* af_t = NULL;
float* b_t = NULL;
float* x_t = NULL;
/* Check leading dimension(s) */
if( lda < n ) {
info = -6;
LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
return info;
}
if( ldaf < n ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
return info;
}
if( ldb < nrhs ) {
info = -11;
LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
return info;
}
if( ldx < nrhs ) {
info = -13;
LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
if( a_t == NULL ) {
goto exit_level_0;
}
af_t = (float*)LAPACKE_malloc( sizeof(float) * ldaf_t * MAX(1,n) );
if( af_t == NULL ) {
goto exit_level_1;
}
b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
if( b_t == NULL ) {
goto exit_level_2;
}
x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
if( x_t == NULL ) {
goto exit_level_3;
}
/* Transpose input matrices */
LAPACKE_sge_trans( matrix_order, n, n, a, lda, a_t, lda_t );
LAPACKE_sge_trans( matrix_order, n, n, af, ldaf, af_t, ldaf_t );
LAPACKE_sge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
LAPACKE_sge_trans( matrix_order, n, nrhs, x, ldx, x_t, ldx_t );
/* Call LAPACK function and adjust info */
LAPACK_sgerfs( &trans, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t, ipiv, b_t,
&ldb_t, x_t, &ldx_t, ferr, berr, work, iwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
/* Release memory and exit */
LAPACKE_free( x_t );
exit_level_3:
LAPACKE_free( b_t );
exit_level_2:
LAPACKE_free( af_t );
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
}
return info;
}

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