You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
2.4 KiB
96 lines
2.4 KiB
2 years ago
|
*> \brief \b SLABAD
|
||
|
|
*
|
||
|
|
* =========== DOCUMENTATION ===========
|
||
|
|
*
|
||
|
|
* Online html documentation available at
|
||
|
|
* http://www.netlib.org/lapack/explore-html/
|
||
|
|
*
|
||
|
|
*> \htmlonly
|
||
|
|
*> Download SLABAD + dependencies
|
||
|
|
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/slabad.f">
|
||
|
|
*> [TGZ]</a>
|
||
|
|
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/slabad.f">
|
||
|
|
*> [ZIP]</a>
|
||
|
|
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/slabad.f">
|
||
|
|
*> [TXT]</a>
|
||
|
|
*> \endhtmlonly
|
||
|
|
*
|
||
|
|
* Definition:
|
||
|
|
* ===========
|
||
|
|
*
|
||
|
|
* SUBROUTINE SLABAD( SMALL, LARGE )
|
||
|
|
*
|
||
|
|
* .. Scalar Arguments ..
|
||
|
|
* REAL LARGE, SMALL
|
||
|
|
* ..
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*> \par Purpose:
|
||
|
|
* =============
|
||
|
|
*>
|
||
|
|
*> \verbatim
|
||
|
|
*>
|
||
|
|
*> SLABAD is a no-op and kept for compatibility reasons. It used
|
||
|
|
*> to correct the overflow/underflow behavior of machines that
|
||
|
|
*> are not IEEE-754 compliant.
|
||
|
|
*> \endverbatim
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
* ==========
|
||
|
|
*
|
||
|
|
*> \param[in,out] SMALL
|
||
|
|
*> \verbatim
|
||
|
|
*> SMALL is REAL
|
||
|
|
*> On entry, the underflow threshold as computed by SLAMCH.
|
||
|
|
*> On exit, the unchanged value SMALL.
|
||
|
|
*> \endverbatim
|
||
|
|
*>
|
||
|
|
*> \param[in,out] LARGE
|
||
|
|
*> \verbatim
|
||
|
|
*> LARGE is REAL
|
||
|
|
*> On entry, the overflow threshold as computed by SLAMCH.
|
||
|
|
*> On exit, the unchanged value LARGE.
|
||
|
|
*> \endverbatim
|
||
|
|
*
|
||
|
|
* Authors:
|
||
|
|
* ========
|
||
|
|
*
|
||
|
|
*> \author Univ. of Tennessee
|
||
|
|
*> \author Univ. of California Berkeley
|
||
|
|
*> \author Univ. of Colorado Denver
|
||
|
|
*> \author NAG Ltd.
|
||
|
|
*
|
||
|
|
*> \ingroup OTHERauxiliary
|
||
|
|
*
|
||
|
|
* =====================================================================
|
||
|
|
SUBROUTINE SLABAD( SMALL, LARGE )
|
||
|
|
*
|
||
|
|
* -- LAPACK auxiliary routine --
|
||
|
|
* -- LAPACK is a software package provided by Univ. of Tennessee, --
|
||
|
|
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
|
||
|
|
*
|
||
|
|
* .. Scalar Arguments ..
|
||
|
|
REAL LARGE, SMALL
|
||
|
|
* ..
|
||
|
|
*
|
||
|
|
* =====================================================================
|
||
|
|
*
|
||
|
|
* .. Intrinsic Functions ..
|
||
|
|
INTRINSIC LOG10, SQRT
|
||
|
|
* ..
|
||
|
|
* .. Executable Statements ..
|
||
|
|
*
|
||
|
|
* If it looks like we're on a Cray, take the square root of
|
||
|
|
* SMALL and LARGE to avoid overflow and underflow problems.
|
||
|
|
*
|
||
|
|
* IF( LOG10( LARGE ).GT.2000. ) THEN
|
||
|
|
* SMALL = SQRT( SMALL )
|
||
|
|
* LARGE = SQRT( LARGE )
|
||
|
|
* END IF
|
||
|
|
*
|
||
|
|
RETURN
|
||
|
|
*
|
||
|
|
* End of SLABAD
|
||
|
|
*
|
||
|
|
END
|