text: /* ../netlib/dlapy3.f -- translated by f2c (version 20100827). You must link the resulting object file with libf2c: on Microsoft Windows system, link with libf2c.lib;
   on Linux or Unix systems, link with .../path/to/libf2c.a -lm or, if you install libf2c.a in a standard place, with -lf2c -lm -- in that order, at the end of the command line, as in cc *.o -lf2c -lm Source for libf2c is in /netlib/f2c/libf2c.zip, e.g., http://www.netlib.org/f2c/libf2c.zip */
  #include "FLA_f2c.h" /* > \brief \b DLAPY3 returns sqrt(x2+y2+z2). */
  /* =========== DOCUMENTATION =========== */
  /* Online html documentation available at */
  /* http://www.netlib.org/lapack/explore-html/ */
  /* > \htmlonly */
  /* > Download DLAPY3 + dependencies */
  /* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlapy3. f"> */
  /* > [TGZ]</a> */
  /* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlapy3. f"> */
  /* > [ZIP]</a> */
  /* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlapy3. f"> */
  /* > [TXT]</a> */
  /* > \endhtmlonly */
  /* Definition: */
  /* =========== */
  /* DOUBLE PRECISION FUNCTION DLAPY3( X, Y, Z ) */
  /* .. Scalar Arguments .. */
  /* DOUBLE PRECISION X, Y, Z */
  /* .. */
  /* > \par Purpose: */
  /* ============= */
  /* > */
  /* > \verbatim */
  /* > */
  /* > DLAPY3 returns sqrt(x**2+y**2+z**2), taking care not to cause */
  /* > unnecessary overflow. */
  /* > \endverbatim */
  /* Arguments: */
  /* ========== */
  /* > \param[in] X */
  /* > \verbatim */
  /* > X is DOUBLE PRECISION */
  /* > \endverbatim */
  /* > */
  /* > \param[in] Y */
  /* > \verbatim */
  /* > Y is DOUBLE PRECISION */
  /* > \endverbatim */
  /* > */
  /* > \param[in] Z */
  /* > \verbatim */
  /* > Z is DOUBLE PRECISION */
  /* > X, Y and Z specify the values x, y and z. */
  /* > \endverbatim */
  /* Authors: */
  /* ======== */
  /* > \author Univ. of Tennessee */
  /* > \author Univ. of California Berkeley */
  /* > \author Univ. of Colorado Denver */
  /* > \author NAG Ltd. */
  /* > \date September 2012 */
  /* > \ingroup auxOTHERauxiliary */
  /* ===================================================================== */
  doublereal dlapy3_(doublereal *x, doublereal *y, doublereal *z__)
  {
      /* System generated locals */
      doublereal ret_val, d__1, d__2, d__3;
      /* Builtin functions */
      double sqrt(doublereal);
      /* Local variables */
      doublereal w, xabs, yabs, zabs;
      /* -- LAPACK auxiliary routine (version 3.4.2) -- */
      /* -- LAPACK is a software package provided by Univ. of Tennessee, -- */
      /* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- */
      /* September 2012 */
      /* .. Scalar Arguments .. */
      /* .. */
      /* ===================================================================== */
      /* .. Parameters .. */
      /* .. */
      /* .. Local Scalars .. */
      /* .. */
      /* .. Intrinsic Functions .. */
      /* .. */
      /* .. Executable Statements .. */
      xabs = f2c_dabs(*x);
      yabs = f2c_dabs(*y);
      zabs = f2c_dabs(*z__);
      /* Computing MAX */
      d__1 = max(xabs,yabs);
      w = max(d__1,zabs);
      if (w == 0.)
      {
          /* W can be zero for max(0,nan,0) */
          /* adding all three entries together will make sure */
          /* NaN will not disappear. */
          ret_val = xabs + yabs + zabs;
      }
      else
      {
          /* Computing 2nd power */
          d__1 = xabs / w;
          /* Computing 2nd power */
          d__2 = yabs / w;
          /* Computing 2nd power */
          d__3 = zabs / w;
          ret_val = w * sqrt(d__1 * d__1 + d__2 * d__2 + d__3 * d__3);
      }
      return ret_val;
      /* End of DLAPY3 */
  }
  /* dlapy3_ */
  