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/* $OpenBSD: quad_float.h,v 1.4 2000/01/11 08:18:43 mickey Exp $ */
/*
* Copyright 1996 1995 by Open Software Foundation, Inc.
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/*
* pmk1.1
*/
/*
* (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 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 __P((quad_floating_point *, quad_floating_point *, unsigned int *));
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