text: /*-
   * Copyright (c) 1992, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This software was developed by the Computer Systems Engineering group
   * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   * contributed to Berkeley.
   *
   * 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.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
   *
   *	$OpenBSD: quad.h,v 1.8 2014/06/10 04:17:37 deraadt Exp $
   */
  
  /*
   * Quad arithmetic.
   *
   * This library makes the following assumptions:
   *
   *  - The type long long (aka quad_t) exists.
   *
   *  - A quad variable is exactly twice as long as `int'.
   *
   *  - The machine's arithmetic is two's complement.
   *
   * This library can provide 128-bit arithmetic on a machine with 128-bit
   * quads and 64-bit ints, for instance, or 96-bit arithmetic on machines
   * with 48-bit ints.
   */
  
  #include <sys/types.h>
  #include <limits.h>
  
  /*
   * Depending on the desired operation, we view a `long long' (aka quad_t) in
   * one or more of the following formats.
   */
  union uu {
  	quad_t	q;		/* as a (signed) quad */
  	u_quad_t uq;		/* as an unsigned quad */
  	int	sl[2];		/* as two signed ints */
  	u_int	ul[2];		/* as two unsigned ints */
  };
  
  /*
   * Define high and low parts of a quad_t.
   */
  #define	H		_QUAD_HIGHWORD
  #define	L		_QUAD_LOWWORD
  
  /*
   * Total number of bits in a quad_t and in the pieces that make it up.
   * These are used for shifting, and also below for halfword extraction
   * and assembly.
   */
  #define	QUAD_BITS	(sizeof(quad_t) * CHAR_BIT)
  #define	INT_BITS	(sizeof(int) * CHAR_BIT)
  #define	HALF_BITS	(sizeof(int) * CHAR_BIT / 2)
  
  /*
   * Extract high and low shortwords from longword, and move low shortword of
   * longword to upper half of long, i.e., produce the upper longword of
   * ((quad_t)(x) << (number_of_bits_in_int/2)).  (`x' must actually be u_int.)
   *
   * These are used in the multiply code, to split a longword into upper
   * and lower halves, and to reassemble a product as a quad_t, shifted left
   * (sizeof(int)*CHAR_BIT/2).
   */
  #define	HHALF(x)	((u_int)(x) >> HALF_BITS)
  #define	LHALF(x)	((u_int)(x) & (((int)1 << HALF_BITS) - 1))
  #define	LHUP(x)		((u_int)(x) << HALF_BITS)
  
  typedef unsigned int	qshift_t;
  
  quad_t __adddi3(quad_t, quad_t);
  quad_t __anddi3(quad_t, quad_t);
  quad_t __ashldi3(quad_t, qshift_t);
  quad_t __ashrdi3(quad_t, qshift_t);
  int __cmpdi2(quad_t, quad_t);
  quad_t __divdi3(quad_t, quad_t);
  quad_t __fixdfdi(double);
  quad_t __fixsfdi(float);
  u_quad_t __fixunsdfdi(double);
  u_quad_t __fixunssfdi(float);
  double __floatdidf(quad_t);
  float __floatdisf(quad_t);
  double __floatunsdidf(u_quad_t);
  quad_t __iordi3(quad_t, quad_t);
  quad_t __lshldi3(quad_t, qshift_t);
  quad_t __lshrdi3(quad_t, qshift_t);
  quad_t __moddi3(quad_t, quad_t);
  quad_t __muldi3(quad_t, quad_t);
  quad_t __negdi2(quad_t);
  quad_t __one_cmpldi2(quad_t);
  u_quad_t __qdivrem(u_quad_t, u_quad_t, u_quad_t *);
  quad_t __subdi3(quad_t, quad_t);
  int __ucmpdi2(u_quad_t, u_quad_t);
  /* XXXahoka: mark as "used" to avoid linking failure with gcc's lto */
  u_quad_t __udivdi3(u_quad_t, u_quad_t) __attribute__((used));
  u_quad_t __umoddi3(u_quad_t, u_quad_t) __attribute__((used));
  quad_t __xordi3(quad_t, quad_t);
  