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