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Diff for /rpl/lapack/lapack/ieeeck.f between versions 1.3 and 1.18

version 1.3, 2010/08/06 15:28:50 version 1.18, 2018/05/29 07:18:12
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   *> \brief \b IEEECK
   *
   *  =========== DOCUMENTATION ===========
   *
   * Online html documentation available at
   *            http://www.netlib.org/lapack/explore-html/
   *
   *> \htmlonly
   *> Download IEEECK + dependencies
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/ieeeck.f">
   *> [TGZ]</a>
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/ieeeck.f">
   *> [ZIP]</a>
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/ieeeck.f">
   *> [TXT]</a>
   *> \endhtmlonly
   *
   *  Definition:
   *  ===========
   *
   *       INTEGER          FUNCTION IEEECK( ISPEC, ZERO, ONE )
   *
   *       .. Scalar Arguments ..
   *       INTEGER            ISPEC
   *       REAL               ONE, ZERO
   *       ..
   *
   *
   *> \par Purpose:
   *  =============
   *>
   *> \verbatim
   *>
   *> IEEECK is called from the ILAENV to verify that Infinity and
   *> possibly NaN arithmetic is safe (i.e. will not trap).
   *> \endverbatim
   *
   *  Arguments:
   *  ==========
   *
   *> \param[in] ISPEC
   *> \verbatim
   *>          ISPEC is INTEGER
   *>          Specifies whether to test just for inifinity arithmetic
   *>          or whether to test for infinity and NaN arithmetic.
   *>          = 0: Verify infinity arithmetic only.
   *>          = 1: Verify infinity and NaN arithmetic.
   *> \endverbatim
   *>
   *> \param[in] ZERO
   *> \verbatim
   *>          ZERO is REAL
   *>          Must contain the value 0.0
   *>          This is passed to prevent the compiler from optimizing
   *>          away this code.
   *> \endverbatim
   *>
   *> \param[in] ONE
   *> \verbatim
   *>          ONE is REAL
   *>          Must contain the value 1.0
   *>          This is passed to prevent the compiler from optimizing
   *>          away this code.
   *>
   *>  RETURN VALUE:  INTEGER
   *>          = 0:  Arithmetic failed to produce the correct answers
   *>          = 1:  Arithmetic produced the correct answers
   *> \endverbatim
   *
   *  Authors:
   *  ========
   *
   *> \author Univ. of Tennessee
   *> \author Univ. of California Berkeley
   *> \author Univ. of Colorado Denver
   *> \author NAG Ltd.
   *
   *> \date December 2016
   *
   *> \ingroup OTHERauxiliary
   *
   *  =====================================================================
       INTEGER          FUNCTION IEEECK( ISPEC, ZERO, ONE )        INTEGER          FUNCTION IEEECK( ISPEC, ZERO, ONE )
 *  *
 *  -- LAPACK auxiliary routine (version 3.2) --  *  -- LAPACK auxiliary routine (version 3.7.0) --
 *  -- 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..--
 *     November 2006  *     December 2016
 *  *
 *     .. Scalar Arguments ..  *     .. Scalar Arguments ..
       INTEGER            ISPEC        INTEGER            ISPEC
       REAL               ONE, ZERO        REAL               ONE, ZERO
 *     ..  *     ..
 *  *
 *  Purpose  *  =====================================================================
 *  =======  
 *  
 *  IEEECK is called from the ILAENV to verify that Infinity and  
 *  possibly NaN arithmetic is safe (i.e. will not trap).  
 *  
 *  Arguments  
 *  =========  
 *  
 *  ISPEC   (input) INTEGER  
 *          Specifies whether to test just for inifinity arithmetic  
 *          or whether to test for infinity and NaN arithmetic.  
 *          = 0: Verify infinity arithmetic only.  
 *          = 1: Verify infinity and NaN arithmetic.  
 *  
 *  ZERO    (input) REAL  
 *          Must contain the value 0.0  
 *          This is passed to prevent the compiler from optimizing  
 *          away this code.  
 *  
 *  ONE     (input) REAL  
 *          Must contain the value 1.0  
 *          This is passed to prevent the compiler from optimizing  
 *          away this code.  
 *  
 *  RETURN VALUE:  INTEGER  
 *          = 0:  Arithmetic failed to produce the correct answers  
 *          = 1:  Arithmetic produced the correct answers  
 *  *
 *     .. Local Scalars ..  *     .. Local Scalars ..
       REAL               NAN1, NAN2, NAN3, NAN4, NAN5, NAN6, NEGINF,        REAL               NAN1, NAN2, NAN3, NAN4, NAN5, NAN6, NEGINF,
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 *  *
       NAN5 = NEGINF*NEGZRO        NAN5 = NEGINF*NEGZRO
 *  *
       NAN6 = NAN5*0.0        NAN6 = NAN5*ZERO
 *  *
       IF( NAN1.EQ.NAN1 ) THEN        IF( NAN1.EQ.NAN1 ) THEN
          IEEECK = 0           IEEECK = 0
Removed from v.1.3  
changed lines
  Added in v.1.18

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