!>
!> SGET01 reconstructs a matrix A from its L*U factorization and
!> computes the residual
!>    norm(L*U - A) / ( N * norm(A) * EPS ),
!> where EPS is the machine epsilon.
!> 

M

!>          M is INTEGER
!>          The number of rows of the matrix A.  M >= 0.
!> 

N

!>          N is INTEGER
!>          The number of columns of the matrix A.  N >= 0.
!> 

A

!>          A is REAL array, dimension (LDA,N)
!>          The original M x N matrix A.
!> 

LDA

!>          LDA is INTEGER
!>          The leading dimension of the array A.  LDA >= max(1,M).
!> 

AFAC

!>          AFAC is REAL array, dimension (LDAFAC,N)
!>          The factored form of the matrix A.  AFAC contains the factors
!>          L and U from the L*U factorization as computed by SGETRF.
!>          Overwritten with the reconstructed matrix, and then with the
!>          difference L*U - A.
!> 

LDAFAC

!>          LDAFAC is INTEGER
!>          The leading dimension of the array AFAC.  LDAFAC >= max(1,M).
!> 

IPIV

!>          IPIV is INTEGER array, dimension (N)
!>          The pivot indices from SGETRF.
!> 

RWORK

!>          RWORK is REAL array, dimension (M)
!> 

RESID

!>          RESID is REAL
!>          norm(L*U - A) / ( N * norm(A) * EPS )
!> 

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