/* IEEE754 floating point arithmetic
   * double precision: common utilities
   */
  /*
   * MIPS floating point support
   * Copyright (C) 1994-2000 Algorithmics Ltd.

   *
   * ########################################################################
   *
   *  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_flong(s64 x)
  {

  	u64 xm;
  	int xe;
  	int xs;

  
  	CLEARCX;

  	if (x == 0)
  		return ieee754dp_zero(0);
  	if (x == 1 || x == -1)
  		return ieee754dp_one(x < 0);
  	if (x == 10 || x == -10)
  		return ieee754dp_ten(x < 0);
  
  	xs = (x < 0);
  	if (xs) {
  		if (x == (1ULL << 63))
  			xm = (1ULL << 63);	/* max neg can't be safely negated */
  		else
  			xm = -x;
  	} else {
  		xm = x;
  	}
  
  	/* normalize */
  	xe = DP_MBITS + 3;
  	if (xm >> (DP_MBITS + 1 + 3)) {
  		/* shunt out overflow bits */
  		while (xm >> (DP_MBITS + 1 + 3)) {
  			XDPSRSX1();
  		}
  	} else {
  		/* normalize in grs extended double precision */
  		while ((xm >> (DP_MBITS + 3)) == 0) {
  			xm <<= 1;
  			xe--;
  		}
  	}
  	DPNORMRET1(xs, xe, xm, "dp_flong", x);
  }
  
  ieee754dp ieee754dp_fulong(u64 u)
  {
  	if ((s64) u < 0)
  		return ieee754dp_add(ieee754dp_1e63(),
  				     ieee754dp_flong(u & ~(1ULL << 63)));
  	return ieee754dp_flong(u);
  }