text: /*-
   * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   *
   * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $FreeBSD$
   */
  
  #include <float.h>
  #include <math.h>
  
  #include "fpmath.h"
  
  #if LDBL_MAX_EXP != 0x4000
  #error "Unsupported long double format"
  #endif
  
  long double
  frexpl(long double x, int *ex)
  {
  	union IEEEl2bits u;
  
  	u.e = x;
  	switch (u.bits.exp) {
  	case 0:		/* 0 or subnormal */
  		if ((u.bits.manl | u.bits.manh) == 0) {
  			*ex = 0;
  		} else {
  			u.e *= 0x1.0p514;
  			*ex = u.bits.exp - 0x4200;
  			u.bits.exp = 0x3ffe;
  		}
  		break;
  	case 0x7fff:	/* infinity or NaN; value of *ex is unspecified */
  		break;
  	default:	/* normal */
  		*ex = u.bits.exp - 0x3ffe;
  		u.bits.exp = 0x3ffe;
  		break;
  	}
  	return (u.e);
  }
  