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Initial revision

/*	$OpenBSD: quad_float.h,v 1.8 2003/04/10 17:27:58 mickey Exp $	*/
/*
  (c) Copyright 1986 HEWLETT-PACKARD COMPANY
  To anyone who acknowledges that this file is provided "AS IS"
  without any express or implied warranty:
      permission to use, copy, modify, and distribute this file
  for any purpose is hereby granted without fee, provided that
  the above copyright notice and this notice appears in all
  copies, and that the name of Hewlett-Packard Company not be
  used in advertising or publicity pertaining to distribution
  of the software without specific, written prior permission.
  Hewlett-Packard Company makes no representations about the
  suitability of this software for any purpose.
*/
/* @(#)quad_float.h: Revision: 1.7.88.1 Date: 93/12/07 15:06:55 */

/******************************
 *  Quad precision functions  *
 ******************************/

/* 32-bit word grabing functions */
#define Quad_firstword(value) Qallp1(value)
#define Quad_secondword(value) Qallp2(value)
#define Quad_thirdword(value)  Qallp3(value)
#define Quad_fourthword(value)  Qallp4(value)


/* This magnitude comparison uses the signless first words and
 * the regular part2 words.  The comparison is graphically:
 *
 *       1st greater?  ----------->|
 *                                 |
 *       1st less?-----------------+------->|
 *                                 |        |
 *       2nd greater?------------->|        |
 *                                 |        |
 *       2nd less?-----------------+------->|
 *                                 |        |
 *       3rd greater?------------->|        |
 *                                 |        |
 *       3rd less?-----------------+------->|
 *                                 |        |
 *       4th greater or equal?---->|        |
 *                                 |        |
 *                               False     True
 */
#define Quad_ismagnitudeless(leftp3,leftp4,rightp1,rightp2,rightp3,rightp4,signlessleft,signlessright) \
/*  Quad_floating_point left, right;          *				\
 *  unsigned int signlessleft, signlessright; */			\
      ( signlessleft<=signlessright &&					\
       (signlessleft<signlessright || (Qallp2(leftp2)<=Qallp2(rightp2) && \
	(Qallp2(leftp2)<Qallp2(rightp2) || (Qallp3(leftp3)<=Qallp3(rightp3) && \
	 (Qallp3(leftp3)<Qallp3(rightp3) || Qallp4(leftp4)<Qallp4(rightp4)))))))

#define Quad_xor_to_intp1(leftp1,rightp1,result)		\
    /* quad_floating_point left, right;				\
     * unsigned int result; */					\
    result = Qallp1(leftp1) XOR Qallp1(rightp1);

#define Quad_xor_from_intp1(leftp1,rightp1,result)		\
    /* quad_floating_point right, result;			\
     * unsigned int left; */					\
    Qallp1(resultp1) = left XOR Qallp1(rightp1)

#define Quad_swap_lower(leftp1,leftp2,leftp3,leftp4,rightp1,rightp2,rightp3,rightp4)  \
    /* quad_floating_point left, right; */			\
    Qallp2(leftp2)  = Qallp2(leftp2) XOR Qallp2(rightp2)	\
    Qallp2(rightp2) = Qallp2(leftp2) XOR Qallp2(rightp2)	\
    Qallp2(leftp2)  = Qallp2(leftp2) XOR Qallp2(rightp2)	\
    Qallp3(leftp3)  = Qallp3(leftp3) XOR Qallp3(rightp3)	\
    Qallp3(rightp3) = Qallp3(leftp3) XOR Qallp3(rightp3)	\
    Qallp3(leftp3)  = Qallp3(leftp3) XOR Qallp3(rightp3)	\
    Qallp4(leftp4)  = Qallp4(leftp4) XOR Qallp4(rightp4)	\
    Qallp4(rightp4) = Qallp4(leftp4) XOR Qallp4(rightp4)	\
    Qallp4(leftp4)  = Qallp4(leftp4) XOR Qallp4(rightp4)

int quad_frnd(quad_floating_point *, quad_floating_point *, quad_floating_point *, unsigned int *);