--- rpl/lapack/lapack/dgtrfs.f 2010/08/06 15:28:38 1.3
+++ rpl/lapack/lapack/dgtrfs.f 2012/12/14 12:30:21 1.11
@@ -1,13 +1,218 @@
+*> \brief \b DGTRFS
+*
+* =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+* http://www.netlib.org/lapack/explore-html/
+*
+*> \htmlonly
+*> Download DGTRFS + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
+*> [TXT]
+*> \endhtmlonly
+*
+* Definition:
+* ===========
+*
+* SUBROUTINE DGTRFS( TRANS, N, NRHS, DL, D, DU, DLF, DF, DUF, DU2,
+* IPIV, B, LDB, X, LDX, FERR, BERR, WORK, IWORK,
+* INFO )
+*
+* .. Scalar Arguments ..
+* CHARACTER TRANS
+* INTEGER INFO, LDB, LDX, N, NRHS
+* ..
+* .. Array Arguments ..
+* INTEGER IPIV( * ), IWORK( * )
+* DOUBLE PRECISION B( LDB, * ), BERR( * ), D( * ), DF( * ),
+* $ DL( * ), DLF( * ), DU( * ), DU2( * ), DUF( * ),
+* $ FERR( * ), WORK( * ), X( LDX, * )
+* ..
+*
+*
+*> \par Purpose:
+* =============
+*>
+*> \verbatim
+*>
+*> DGTRFS improves the computed solution to a system of linear
+*> equations when the coefficient matrix is tridiagonal, and provides
+*> error bounds and backward error estimates for the solution.
+*> \endverbatim
+*
+* Arguments:
+* ==========
+*
+*> \param[in] TRANS
+*> \verbatim
+*> TRANS is CHARACTER*1
+*> Specifies the form of the system of equations:
+*> = 'N': A * X = B (No transpose)
+*> = 'T': A**T * X = B (Transpose)
+*> = 'C': A**H * X = B (Conjugate transpose = Transpose)
+*> \endverbatim
+*>
+*> \param[in] N
+*> \verbatim
+*> N is INTEGER
+*> The order of the matrix A. N >= 0.
+*> \endverbatim
+*>
+*> \param[in] NRHS
+*> \verbatim
+*> NRHS is INTEGER
+*> The number of right hand sides, i.e., the number of columns
+*> of the matrix B. NRHS >= 0.
+*> \endverbatim
+*>
+*> \param[in] DL
+*> \verbatim
+*> DL is DOUBLE PRECISION array, dimension (N-1)
+*> The (n-1) subdiagonal elements of A.
+*> \endverbatim
+*>
+*> \param[in] D
+*> \verbatim
+*> D is DOUBLE PRECISION array, dimension (N)
+*> The diagonal elements of A.
+*> \endverbatim
+*>
+*> \param[in] DU
+*> \verbatim
+*> DU is DOUBLE PRECISION array, dimension (N-1)
+*> The (n-1) superdiagonal elements of A.
+*> \endverbatim
+*>
+*> \param[in] DLF
+*> \verbatim
+*> DLF is DOUBLE PRECISION array, dimension (N-1)
+*> The (n-1) multipliers that define the matrix L from the
+*> LU factorization of A as computed by DGTTRF.
+*> \endverbatim
+*>
+*> \param[in] DF
+*> \verbatim
+*> DF is DOUBLE PRECISION array, dimension (N)
+*> The n diagonal elements of the upper triangular matrix U from
+*> the LU factorization of A.
+*> \endverbatim
+*>
+*> \param[in] DUF
+*> \verbatim
+*> DUF is DOUBLE PRECISION array, dimension (N-1)
+*> The (n-1) elements of the first superdiagonal of U.
+*> \endverbatim
+*>
+*> \param[in] DU2
+*> \verbatim
+*> DU2 is DOUBLE PRECISION array, dimension (N-2)
+*> The (n-2) elements of the second superdiagonal of U.
+*> \endverbatim
+*>
+*> \param[in] IPIV
+*> \verbatim
+*> IPIV is INTEGER array, dimension (N)
+*> The pivot indices; for 1 <= i <= n, row i of the matrix was
+*> interchanged with row IPIV(i). IPIV(i) will always be either
+*> i or i+1; IPIV(i) = i indicates a row interchange was not
+*> required.
+*> \endverbatim
+*>
+*> \param[in] B
+*> \verbatim
+*> B is DOUBLE PRECISION array, dimension (LDB,NRHS)
+*> The right hand side matrix B.
+*> \endverbatim
+*>
+*> \param[in] LDB
+*> \verbatim
+*> LDB is INTEGER
+*> The leading dimension of the array B. LDB >= max(1,N).
+*> \endverbatim
+*>
+*> \param[in,out] X
+*> \verbatim
+*> X is DOUBLE PRECISION array, dimension (LDX,NRHS)
+*> On entry, the solution matrix X, as computed by DGTTRS.
+*> On exit, the improved solution matrix X.
+*> \endverbatim
+*>
+*> \param[in] LDX
+*> \verbatim
+*> LDX is INTEGER
+*> The leading dimension of the array X. LDX >= max(1,N).
+*> \endverbatim
+*>
+*> \param[out] FERR
+*> \verbatim
+*> FERR is DOUBLE PRECISION array, dimension (NRHS)
+*> The estimated forward error bound for each solution vector
+*> X(j) (the j-th column of the solution matrix X).
+*> If XTRUE is the true solution corresponding to X(j), FERR(j)
+*> is an estimated upper bound for the magnitude of the largest
+*> element in (X(j) - XTRUE) divided by the magnitude of the
+*> largest element in X(j). The estimate is as reliable as
+*> the estimate for RCOND, and is almost always a slight
+*> overestimate of the true error.
+*> \endverbatim
+*>
+*> \param[out] BERR
+*> \verbatim
+*> BERR is DOUBLE PRECISION array, dimension (NRHS)
+*> The componentwise relative backward error of each solution
+*> vector X(j) (i.e., the smallest relative change in
+*> any element of A or B that makes X(j) an exact solution).
+*> \endverbatim
+*>
+*> \param[out] WORK
+*> \verbatim
+*> WORK is DOUBLE PRECISION array, dimension (3*N)
+*> \endverbatim
+*>
+*> \param[out] IWORK
+*> \verbatim
+*> IWORK is INTEGER array, dimension (N)
+*> \endverbatim
+*>
+*> \param[out] INFO
+*> \verbatim
+*> INFO is INTEGER
+*> = 0: successful exit
+*> < 0: if INFO = -i, the i-th argument had an illegal value
+*> \endverbatim
+*
+*> \par Internal Parameters:
+* =========================
+*>
+*> \verbatim
+*> ITMAX is the maximum number of steps of iterative refinement.
+*> \endverbatim
+*
+* Authors:
+* ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \date September 2012
+*
+*> \ingroup doubleGTcomputational
+*
+* =====================================================================
SUBROUTINE DGTRFS( TRANS, N, NRHS, DL, D, DU, DLF, DF, DUF, DU2,
$ IPIV, B, LDB, X, LDX, FERR, BERR, WORK, IWORK,
$ INFO )
*
-* -- LAPACK routine (version 3.2) --
+* -- LAPACK computational routine (version 3.4.2) --
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-* November 2006
-*
-* Modified to call DLACN2 in place of DLACON, 5 Feb 03, SJH.
+* September 2012
*
* .. Scalar Arguments ..
CHARACTER TRANS
@@ -20,99 +225,6 @@
$ FERR( * ), WORK( * ), X( LDX, * )
* ..
*
-* Purpose
-* =======
-*
-* DGTRFS improves the computed solution to a system of linear
-* equations when the coefficient matrix is tridiagonal, and provides
-* error bounds and backward error estimates for the solution.
-*
-* Arguments
-* =========
-*
-* TRANS (input) CHARACTER*1
-* Specifies the form of the system of equations:
-* = 'N': A * X = B (No transpose)
-* = 'T': A**T * X = B (Transpose)
-* = 'C': A**H * X = B (Conjugate transpose = Transpose)
-*
-* N (input) INTEGER
-* The order of the matrix A. N >= 0.
-*
-* NRHS (input) INTEGER
-* The number of right hand sides, i.e., the number of columns
-* of the matrix B. NRHS >= 0.
-*
-* DL (input) DOUBLE PRECISION array, dimension (N-1)
-* The (n-1) subdiagonal elements of A.
-*
-* D (input) DOUBLE PRECISION array, dimension (N)
-* The diagonal elements of A.
-*
-* DU (input) DOUBLE PRECISION array, dimension (N-1)
-* The (n-1) superdiagonal elements of A.
-*
-* DLF (input) DOUBLE PRECISION array, dimension (N-1)
-* The (n-1) multipliers that define the matrix L from the
-* LU factorization of A as computed by DGTTRF.
-*
-* DF (input) DOUBLE PRECISION array, dimension (N)
-* The n diagonal elements of the upper triangular matrix U from
-* the LU factorization of A.
-*
-* DUF (input) DOUBLE PRECISION array, dimension (N-1)
-* The (n-1) elements of the first superdiagonal of U.
-*
-* DU2 (input) DOUBLE PRECISION array, dimension (N-2)
-* The (n-2) elements of the second superdiagonal of U.
-*
-* IPIV (input) INTEGER array, dimension (N)
-* The pivot indices; for 1 <= i <= n, row i of the matrix was
-* interchanged with row IPIV(i). IPIV(i) will always be either
-* i or i+1; IPIV(i) = i indicates a row interchange was not
-* required.
-*
-* B (input) DOUBLE PRECISION array, dimension (LDB,NRHS)
-* The right hand side matrix B.
-*
-* LDB (input) INTEGER
-* The leading dimension of the array B. LDB >= max(1,N).
-*
-* X (input/output) DOUBLE PRECISION array, dimension (LDX,NRHS)
-* On entry, the solution matrix X, as computed by DGTTRS.
-* On exit, the improved solution matrix X.
-*
-* LDX (input) INTEGER
-* The leading dimension of the array X. LDX >= max(1,N).
-*
-* FERR (output) DOUBLE PRECISION array, dimension (NRHS)
-* The estimated forward error bound for each solution vector
-* X(j) (the j-th column of the solution matrix X).
-* If XTRUE is the true solution corresponding to X(j), FERR(j)
-* is an estimated upper bound for the magnitude of the largest
-* element in (X(j) - XTRUE) divided by the magnitude of the
-* largest element in X(j). The estimate is as reliable as
-* the estimate for RCOND, and is almost always a slight
-* overestimate of the true error.
-*
-* BERR (output) DOUBLE PRECISION array, dimension (NRHS)
-* The componentwise relative backward error of each solution
-* vector X(j) (i.e., the smallest relative change in
-* any element of A or B that makes X(j) an exact solution).
-*
-* WORK (workspace) DOUBLE PRECISION array, dimension (3*N)
-*
-* IWORK (workspace) INTEGER array, dimension (N)
-*
-* INFO (output) INTEGER
-* = 0: successful exit
-* < 0: if INFO = -i, the i-th argument had an illegal value
-*
-* Internal Parameters
-* ===================
-*
-* ITMAX is the maximum number of steps of iterative refinement.
-*
* =====================================================================
*
* .. Parameters ..