--- rpl/lapack/lapack/dsytf2.f	2012/12/14 14:22:41	1.13
+++ rpl/lapack/lapack/dsytf2.f	2014/01/27 09:24:35	1.14
@@ -90,13 +90,22 @@
 *> \verbatim
 *>          IPIV is INTEGER array, dimension (N)
 *>          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' and IPIV(k) = IPIV(k-1) < 0, then rows and
-*>          columns 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' and 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.
+*>
+*>          If UPLO = 'U':
+*>             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-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
 *>
 *> \param[out] INFO
@@ -118,7 +127,7 @@
 *> \author Univ. of Colorado Denver 
 *> \author NAG Ltd. 
 *
-*> \date September 2012
+*> \date November 2013
 *
 *> \ingroup doubleSYcomputational
 *
@@ -185,10 +194,10 @@
 *  =====================================================================
       SUBROUTINE DSYTF2( 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,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-*     September 2012
+*     November 2013
 *
 *     .. Scalar Arguments ..
       CHARACTER          UPLO
@@ -268,7 +277,8 @@
          ABSAKK = ABS( A( K, K ) )
 *
 *        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
             IMAX = IDAMAX( K-1, A( 1, K ), 1 )
@@ -279,7 +289,8 @@
 *
          IF( (MAX( ABSAKK, COLMAX ).EQ.ZERO) .OR. DISNAN(ABSAKK) ) THEN
 *
-*           Column K is zero or contains a NaN: set INFO and continue
+*           Column K is zero or underflow, or contains a NaN:
+*           set INFO and continue
 *
             IF( INFO.EQ.0 )
      $         INFO = K
@@ -436,7 +447,8 @@
          ABSAKK = ABS( A( K, K ) )
 *
 *        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
             IMAX = K + IDAMAX( N-K, A( K+1, K ), 1 )
@@ -447,7 +459,8 @@
 *
          IF( (MAX( ABSAKK, COLMAX ).EQ.ZERO) .OR. DISNAN(ABSAKK) ) THEN
 *
-*           Column K is zero or contains a NaN: set INFO and continue
+*           Column K is zero or underflow, or contains a NaN:
+*           set INFO and continue
 *
             IF( INFO.EQ.0 )
      $         INFO = K