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Diff for /rpl/lapack/lapack/zsytf2.f between versions 1.13 and 1.14

version 1.13, 2012/12/14 14:22:55 version 1.14, 2014/01/27 09:24:37
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 *> \verbatim  *> \verbatim
 *>          IPIV is INTEGER array, dimension (N)  *>          IPIV is INTEGER array, dimension (N)
 *>          Details of the interchanges and the block structure of D.  *>          Details of the interchanges and the block structure of D.
 *>          If IPIV(k) > 0, then rows and columns k and IPIV(k) were  *>
 *>          interchanged and D(k,k) is a 1-by-1 diagonal block.  *>          If UPLO = 'U':
 *>          If UPLO = 'U' and IPIV(k) = IPIV(k-1) < 0, then rows and  *>             If IPIV(k) > 0, then rows and columns k and IPIV(k) were
 *>          columns k-1 and -IPIV(k) were interchanged and D(k-1:k,k-1:k)  *>             interchanged and D(k,k) is a 1-by-1 diagonal block.
 *>          is a 2-by-2 diagonal block.  If UPLO = 'L' and IPIV(k) =  *>
 *>          IPIV(k+1) < 0, then rows and columns k+1 and -IPIV(k) were  *>             If IPIV(k) = IPIV(k-1) < 0, then rows and columns
 *>          interchanged and D(k:k+1,k:k+1) is a 2-by-2 diagonal block.  *>             k-1 and -IPIV(k) were interchanged and D(k-1:k,k-1:k)
   *>             is a 2-by-2 diagonal block.
   *>
   *>          If UPLO = 'L':
   *>             If IPIV(k) > 0, then rows and columns k and IPIV(k) were
   *>             interchanged and D(k,k) is a 1-by-1 diagonal block.
   *>
   *>             If IPIV(k) = IPIV(k+1) < 0, then rows and columns
   *>             k+1 and -IPIV(k) were interchanged and D(k:k+1,k:k+1)
   *>             is a 2-by-2 diagonal block.
 *> \endverbatim  *> \endverbatim
 *>  *>
 *> \param[out] INFO  *> \param[out] INFO
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 *> \author Univ. of Colorado Denver   *> \author Univ. of Colorado Denver 
 *> \author NAG Ltd.   *> \author NAG Ltd. 
 *  *
 *> \date September 2012  *> \date November 2013
 *  *
 *> \ingroup complex16SYcomputational  *> \ingroup complex16SYcomputational
 *  *
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 *  =====================================================================  *  =====================================================================
       SUBROUTINE ZSYTF2( UPLO, N, A, LDA, IPIV, INFO )        SUBROUTINE ZSYTF2( UPLO, N, A, LDA, IPIV, INFO )
 *  *
 *  -- LAPACK computational routine (version 3.4.2) --  *  -- LAPACK computational routine (version 3.5.0) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --  *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--  *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
 *     September 2012  *     November 2013
 *  *
 *     .. Scalar Arguments ..  *     .. Scalar Arguments ..
       CHARACTER          UPLO        CHARACTER          UPLO
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          ABSAKK = CABS1( A( K, K ) )           ABSAKK = CABS1( A( K, K ) )
 *  *
 *        IMAX is the row-index of the largest off-diagonal element in  *        IMAX is the row-index of the largest off-diagonal element in
 *        column K, and COLMAX is its absolute value  *        column K, and COLMAX is its absolute value.
   *        Determine both COLMAX and IMAX.
 *  *
          IF( K.GT.1 ) THEN           IF( K.GT.1 ) THEN
             IMAX = IZAMAX( K-1, A( 1, K ), 1 )              IMAX = IZAMAX( K-1, A( 1, K ), 1 )
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 *  *
          IF( MAX( ABSAKK, COLMAX ).EQ.ZERO .OR. DISNAN(ABSAKK) ) THEN           IF( MAX( ABSAKK, COLMAX ).EQ.ZERO .OR. DISNAN(ABSAKK) ) THEN
 *  *
 *           Column K is zero or NaN: set INFO and continue  *           Column K is zero or underflow, or contains a NaN:
   *           set INFO and continue
 *  *
             IF( INFO.EQ.0 )              IF( INFO.EQ.0 )
      $         INFO = K       $         INFO = K
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          ABSAKK = CABS1( A( K, K ) )           ABSAKK = CABS1( A( K, K ) )
 *  *
 *        IMAX is the row-index of the largest off-diagonal element in  *        IMAX is the row-index of the largest off-diagonal element in
 *        column K, and COLMAX is its absolute value  *        column K, and COLMAX is its absolute value.
   *        Determine both COLMAX and IMAX.
 *  *
          IF( K.LT.N ) THEN           IF( K.LT.N ) THEN
             IMAX = K + IZAMAX( N-K, A( K+1, K ), 1 )              IMAX = K + IZAMAX( N-K, A( K+1, K ), 1 )
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 *  *
          IF( MAX( ABSAKK, COLMAX ).EQ.ZERO .OR. DISNAN(ABSAKK) ) THEN           IF( MAX( ABSAKK, COLMAX ).EQ.ZERO .OR. DISNAN(ABSAKK) ) THEN
 *  *
 *           Column K is zero or NaN: set INFO and continue  *           Column K is zero or underflow, or contains a NaN:
   *           set INFO and continue
 *  *
             IF( INFO.EQ.0 )              IF( INFO.EQ.0 )
      $         INFO = K       $         INFO = K
Removed from v.1.13  
changed lines
  Added in v.1.14

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