convert linalg library from Fortran to C++

2022-12-28 13:18:38 -05:00
parent 7cceabe5bd
commit c5a87f75d6
410 changed files with 80736 additions and 30 deletions
--- a/lib/linalg/fortran/dlabad.f
+++ b/lib/linalg/fortran/dlabad.f
@ -0,0 +1,102 @@
+*> \brief \b DLABAD
+*
+*  =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+*            http://www.netlib.org/lapack/explore-html/
+*
+*> \htmlonly
+*> Download DLABAD + dependencies
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlabad.f">
+*> [TGZ]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlabad.f">
+*> [ZIP]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlabad.f">
+*> [TXT]</a>
+*> \endhtmlonly
+*
+*  Definition:
+*  ===========
+*
+*       SUBROUTINE DLABAD( SMALL, LARGE )
+*
+*       .. Scalar Arguments ..
+*       DOUBLE PRECISION   LARGE, SMALL
+*       ..
+*
+*
+*> \par Purpose:
+*  =============
+*>
+*> \verbatim
+*>
+*> DLABAD takes as input the values computed by DLAMCH for underflow and
+*> overflow, and returns the square root of each of these values if the
+*> log of LARGE is sufficiently large.  This subroutine is intended to
+*> identify machines with a large exponent range, such as the Crays, and
+*> redefine the underflow and overflow limits to be the square roots of
+*> the values computed by DLAMCH.  This subroutine is needed because
+*> DLAMCH does not compensate for poor arithmetic in the upper half of
+*> the exponent range, as is found on a Cray.
+*> \endverbatim
+*
+*  Arguments:
+*  ==========
+*
+*> \param[in,out] SMALL
+*> \verbatim
+*>          SMALL is DOUBLE PRECISION
+*>          On entry, the underflow threshold as computed by DLAMCH.
+*>          On exit, if LOG10(LARGE) is sufficiently large, the square
+*>          root of SMALL, otherwise unchanged.
+*> \endverbatim
+*>
+*> \param[in,out] LARGE
+*> \verbatim
+*>          LARGE is DOUBLE PRECISION
+*>          On entry, the overflow threshold as computed by DLAMCH.
+*>          On exit, if LOG10(LARGE) is sufficiently large, the square
+*>          root of LARGE, otherwise unchanged.
+*> \endverbatim
+*
+*  Authors:
+*  ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \ingroup OTHERauxiliary
+*
+*  =====================================================================
+      SUBROUTINE DLABAD( 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 ..
+      DOUBLE PRECISION   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.D0 ) THEN
+         SMALL = SQRT( SMALL )
+         LARGE = SQRT( LARGE )
+      END IF
+*
+      RETURN
+*
+*     End of DLABAD
+*
+      END