Integrating Doxygen in comments

1 files changed, 174 insertions, 94 deletions

diff --git a/SRC/sspevd.f b/SRC/sspevd.f
index fd8ec1a9..4416bee3 100644
--- a/SRC/sspevd.f
+++ b/SRC/sspevd.f
@@ -1,10 +1,182 @@
+*> \brief <b> SSPEVD computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices</b>
+*
+*  =========== DOCUMENTATION ===========
+*
+* Online html documentation available at 
+*            http://www.netlib.org/lapack/explore-html/ 
+*
+*  Definition
+*  ==========
+*
+*       SUBROUTINE SSPEVD( JOBZ, UPLO, N, AP, W, Z, LDZ, WORK, LWORK,
+*                          IWORK, LIWORK, INFO )
+* 
+*       .. Scalar Arguments ..
+*       CHARACTER          JOBZ, UPLO
+*       INTEGER            INFO, LDZ, LIWORK, LWORK, N
+*       ..
+*       .. Array Arguments ..
+*       INTEGER            IWORK( * )
+*       REAL               AP( * ), W( * ), WORK( * ), Z( LDZ, * )
+*       ..
+*  
+*  Purpose
+*  =======
+*
+*>\details \b Purpose:
+*>\verbatim
+*>
+*> SSPEVD computes all the eigenvalues and, optionally, eigenvectors
+*> of a real symmetric matrix A in packed storage. If eigenvectors are
+*> desired, it uses a divide and conquer algorithm.
+*>
+*> The divide and conquer algorithm makes very mild assumptions about
+*> floating point arithmetic. It will work on machines with a guard
+*> digit in add/subtract, or on those binary machines without guard
+*> digits which subtract like the Cray X-MP, Cray Y-MP, Cray C-90, or
+*> Cray-2. It could conceivably fail on hexadecimal or decimal machines
+*> without guard digits, but we know of none.
+*>
+*>\endverbatim
+*
+*  Arguments
+*  =========
+*
+*> \param[in] JOBZ
+*> \verbatim
+*>          JOBZ is CHARACTER*1
+*>          = 'N':  Compute eigenvalues only;
+*>          = 'V':  Compute eigenvalues and eigenvectors.
+*> \endverbatim
+*>
+*> \param[in] UPLO
+*> \verbatim
+*>          UPLO is CHARACTER*1
+*>          = 'U':  Upper triangle of A is stored;
+*>          = 'L':  Lower triangle of A is stored.
+*> \endverbatim
+*>
+*> \param[in] N
+*> \verbatim
+*>          N is INTEGER
+*>          The order of the matrix A.  N >= 0.
+*> \endverbatim
+*>
+*> \param[in,out] AP
+*> \verbatim
+*>          AP is REAL array, dimension (N*(N+1)/2)
+*>          On entry, the upper or lower triangle of the symmetric matrix
+*>          A, packed columnwise in a linear array.  The j-th column of A
+*>          is stored in the array AP as follows:
+*>          if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
+*>          if UPLO = 'L', AP(i + (j-1)*(2*n-j)/2) = A(i,j) for j<=i<=n.
+*> \endverbatim
+*> \verbatim
+*>          On exit, AP is overwritten by values generated during the
+*>          reduction to tridiagonal form.  If UPLO = 'U', the diagonal
+*>          and first superdiagonal of the tridiagonal matrix T overwrite
+*>          the corresponding elements of A, and if UPLO = 'L', the
+*>          diagonal and first subdiagonal of T overwrite the
+*>          corresponding elements of A.
+*> \endverbatim
+*>
+*> \param[out] W
+*> \verbatim
+*>          W is REAL array, dimension (N)
+*>          If INFO = 0, the eigenvalues in ascending order.
+*> \endverbatim
+*>
+*> \param[out] Z
+*> \verbatim
+*>          Z is REAL array, dimension (LDZ, N)
+*>          If JOBZ = 'V', then if INFO = 0, Z contains the orthonormal
+*>          eigenvectors of the matrix A, with the i-th column of Z
+*>          holding the eigenvector associated with W(i).
+*>          If JOBZ = 'N', then Z is not referenced.
+*> \endverbatim
+*>
+*> \param[in] LDZ
+*> \verbatim
+*>          LDZ is INTEGER
+*>          The leading dimension of the array Z.  LDZ >= 1, and if
+*>          JOBZ = 'V', LDZ >= max(1,N).
+*> \endverbatim
+*>
+*> \param[out] WORK
+*> \verbatim
+*>          WORK is REAL array, dimension (MAX(1,LWORK))
+*>          On exit, if INFO = 0, WORK(1) returns the required LWORK.
+*> \endverbatim
+*>
+*> \param[in] LWORK
+*> \verbatim
+*>          LWORK is INTEGER
+*>          The dimension of the array WORK.
+*>          If N <= 1,               LWORK must be at least 1.
+*>          If JOBZ = 'N' and N > 1, LWORK must be at least 2*N.
+*>          If JOBZ = 'V' and N > 1, LWORK must be at least
+*>                                                 1 + 6*N + N**2.
+*> \endverbatim
+*> \verbatim
+*>          If LWORK = -1, then a workspace query is assumed; the routine
+*>          only calculates the required sizes of the WORK and IWORK
+*>          arrays, returns these values as the first entries of the WORK
+*>          and IWORK arrays, and no error message related to LWORK or
+*>          LIWORK is issued by XERBLA.
+*> \endverbatim
+*>
+*> \param[out] IWORK
+*> \verbatim
+*>          IWORK is INTEGER array, dimension (MAX(1,LIWORK))
+*>          On exit, if INFO = 0, IWORK(1) returns the required LIWORK.
+*> \endverbatim
+*>
+*> \param[in] LIWORK
+*> \verbatim
+*>          LIWORK is INTEGER
+*>          The dimension of the array IWORK.
+*>          If JOBZ  = 'N' or N <= 1, LIWORK must be at least 1.
+*>          If JOBZ  = 'V' and N > 1, LIWORK must be at least 3 + 5*N.
+*> \endverbatim
+*> \verbatim
+*>          If LIWORK = -1, then a workspace query is assumed; the
+*>          routine only calculates the required sizes of the WORK and
+*>          IWORK arrays, returns these values as the first entries of
+*>          the WORK and IWORK arrays, and no error message related to
+*>          LWORK or LIWORK is issued by XERBLA.
+*> \endverbatim
+*>
+*> \param[out] INFO
+*> \verbatim
+*>          INFO is INTEGER
+*>          = 0:  successful exit
+*>          < 0:  if INFO = -i, the i-th argument had an illegal value.
+*>          > 0:  if INFO = i, the algorithm failed to converge; i
+*>                off-diagonal elements of an intermediate tridiagonal
+*>                form did not converge to zero.
+*> \endverbatim
+*>
+*
+*  Authors
+*  =======
+*
+*> \author Univ. of Tennessee 
+*> \author Univ. of California Berkeley 
+*> \author Univ. of Colorado Denver 
+*> \author NAG Ltd. 
+*
+*> \date November 2011
+*
+*> \ingroup realOTHEReigen
+*
+*  =====================================================================
       SUBROUTINE SSPEVD( JOBZ, UPLO, N, AP, W, Z, LDZ, WORK, LWORK,
      $                   IWORK, LIWORK, INFO )
 *
-*  -- LAPACK driver routine (version 3.2) --
+*  -- LAPACK eigen routine (version 3.2) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-*     November 2006
+*     November 2011
 *
 *     .. Scalar Arguments ..
       CHARACTER          JOBZ, UPLO
@@ -15,98 +187,6 @@
       REAL               AP( * ), W( * ), WORK( * ), Z( LDZ, * )
 *     ..
 *
-*  Purpose
-*  =======
-*
-*  SSPEVD computes all the eigenvalues and, optionally, eigenvectors
-*  of a real symmetric matrix A in packed storage. If eigenvectors are
-*  desired, it uses a divide and conquer algorithm.
-*
-*  The divide and conquer algorithm makes very mild assumptions about
-*  floating point arithmetic. It will work on machines with a guard
-*  digit in add/subtract, or on those binary machines without guard
-*  digits which subtract like the Cray X-MP, Cray Y-MP, Cray C-90, or
-*  Cray-2. It could conceivably fail on hexadecimal or decimal machines
-*  without guard digits, but we know of none.
-*
-*  Arguments
-*  =========
-*
-*  JOBZ    (input) CHARACTER*1
-*          = 'N':  Compute eigenvalues only;
-*          = 'V':  Compute eigenvalues and eigenvectors.
-*
-*  UPLO    (input) CHARACTER*1
-*          = 'U':  Upper triangle of A is stored;
-*          = 'L':  Lower triangle of A is stored.
-*
-*  N       (input) INTEGER
-*          The order of the matrix A.  N >= 0.
-*
-*  AP      (input/output) REAL array, dimension (N*(N+1)/2)
-*          On entry, the upper or lower triangle of the symmetric matrix
-*          A, packed columnwise in a linear array.  The j-th column of A
-*          is stored in the array AP as follows:
-*          if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
-*          if UPLO = 'L', AP(i + (j-1)*(2*n-j)/2) = A(i,j) for j<=i<=n.
-*
-*          On exit, AP is overwritten by values generated during the
-*          reduction to tridiagonal form.  If UPLO = 'U', the diagonal
-*          and first superdiagonal of the tridiagonal matrix T overwrite
-*          the corresponding elements of A, and if UPLO = 'L', the
-*          diagonal and first subdiagonal of T overwrite the
-*          corresponding elements of A.
-*
-*  W       (output) REAL array, dimension (N)
-*          If INFO = 0, the eigenvalues in ascending order.
-*
-*  Z       (output) REAL array, dimension (LDZ, N)
-*          If JOBZ = 'V', then if INFO = 0, Z contains the orthonormal
-*          eigenvectors of the matrix A, with the i-th column of Z
-*          holding the eigenvector associated with W(i).
-*          If JOBZ = 'N', then Z is not referenced.
-*
-*  LDZ     (input) INTEGER
-*          The leading dimension of the array Z.  LDZ >= 1, and if
-*          JOBZ = 'V', LDZ >= max(1,N).
-*
-*  WORK    (workspace/output) REAL array, dimension (MAX(1,LWORK))
-*          On exit, if INFO = 0, WORK(1) returns the required LWORK.
-*
-*  LWORK   (input) INTEGER
-*          The dimension of the array WORK.
-*          If N <= 1,               LWORK must be at least 1.
-*          If JOBZ = 'N' and N > 1, LWORK must be at least 2*N.
-*          If JOBZ = 'V' and N > 1, LWORK must be at least
-*                                                 1 + 6*N + N**2.
-*
-*          If LWORK = -1, then a workspace query is assumed; the routine
-*          only calculates the required sizes of the WORK and IWORK
-*          arrays, returns these values as the first entries of the WORK
-*          and IWORK arrays, and no error message related to LWORK or
-*          LIWORK is issued by XERBLA.
-*
-*  IWORK   (workspace/output) INTEGER array, dimension (MAX(1,LIWORK))
-*          On exit, if INFO = 0, IWORK(1) returns the required LIWORK.
-*
-*  LIWORK  (input) INTEGER
-*          The dimension of the array IWORK.
-*          If JOBZ  = 'N' or N <= 1, LIWORK must be at least 1.
-*          If JOBZ  = 'V' and N > 1, LIWORK must be at least 3 + 5*N.
-*
-*          If LIWORK = -1, then a workspace query is assumed; the
-*          routine only calculates the required sizes of the WORK and
-*          IWORK arrays, returns these values as the first entries of
-*          the WORK and IWORK arrays, and no error message related to
-*          LWORK or LIWORK is issued by XERBLA.
-*
-*  INFO    (output) INTEGER
-*          = 0:  successful exit
-*          < 0:  if INFO = -i, the i-th argument had an illegal value.
-*          > 0:  if INFO = i, the algorithm failed to converge; i
-*                off-diagonal elements of an intermediate tridiagonal
-*                form did not converge to zero.
-*
 *  =====================================================================
 *
 *     .. Parameters ..