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dp_scalb.c

/* IEEE754 floating point arithmetic
 * double precision: common utilities
 */
/*
 * MIPS floating point support
 * Copyright (C) 1994-2000 Algorithmics Ltd.
 * http://www.algor.co.uk
 *
 * ########################################################################
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * ########################################################################
 */


#include "ieee754dp.h"

ieee754dp ieee754dp_scalb(ieee754dp x, int n)
{
      COMPXDP;

      CLEARCX;

      EXPLODEXDP;

      switch (xc) {
      case IEEE754_CLASS_SNAN:
            return ieee754dp_nanxcpt(x, "scalb", x, n);
      case IEEE754_CLASS_QNAN:
      case IEEE754_CLASS_INF:
      case IEEE754_CLASS_ZERO:
            return x;
      case IEEE754_CLASS_DNORM:
            DPDNORMX;
            break;
      case IEEE754_CLASS_NORM:
            break;
      }
      DPNORMRET2(xs, xe + n, xm << 3, "scalb", x, n);
}


ieee754dp ieee754dp_ldexp(ieee754dp x, int n)
{
      return ieee754dp_scalb(x, n);
}

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