105 lines
4.3 KiB
C
105 lines
4.3 KiB
C
/* $NetBSD: quad_float.h,v 1.1 2002/06/05 01:04:26 fredette Exp $ */
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/* $OpenBSD: quad_float.h,v 1.5 2001/03/29 03:58:19 mickey Exp $ */
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/*
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* Copyright 1996 1995 by Open Software Foundation, Inc.
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* All Rights Reserved
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies and
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* that both the copyright notice and this permission notice appear in
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* supporting documentation.
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*
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* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
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* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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/*
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* pmk1.1
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*/
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/*
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* (c) Copyright 1986 HEWLETT-PACKARD COMPANY
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*
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* To anyone who acknowledges that this file is provided "AS IS"
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* without any express or implied warranty:
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* permission to use, copy, modify, and distribute this file
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* for any purpose is hereby granted without fee, provided that
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* the above copyright notice and this notice appears in all
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* copies, and that the name of Hewlett-Packard Company not be
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* used in advertising or publicity pertaining to distribution
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* of the software without specific, written prior permission.
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* Hewlett-Packard Company makes no representations about the
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* suitability of this software for any purpose.
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*/
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/******************************
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* Quad precision functions *
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******************************/
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/* 32-bit word grabing functions */
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#define Quad_firstword(value) Qallp1(value)
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#define Quad_secondword(value) Qallp2(value)
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#define Quad_thirdword(value) Qallp3(value)
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#define Quad_fourthword(value) Qallp4(value)
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/* This magnitude comparison uses the signless first words and
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* the regular part2 words. The comparison is graphically:
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*
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* 1st greater? ----------->|
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* |
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* 1st less?-----------------+------->|
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* | |
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* 2nd greater?------------->| |
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* | |
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* 2nd less?-----------------+------->|
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* | |
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* 3rd greater?------------->| |
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* | |
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* 3rd less?-----------------+------->|
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* | |
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* 4th greater or equal?---->| |
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* | |
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* False True
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*/
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#define Quad_ismagnitudeless(leftp3,leftp4,rightp1,rightp2,rightp3,rightp4,signlessleft,signlessright) \
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/* Quad_floating_point left, right; * \
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* unsigned int signlessleft, signlessright; */ \
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( signlessleft<=signlessright && \
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(signlessleft<signlessright || (Qallp2(leftp2)<=Qallp2(rightp2) && \
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(Qallp2(leftp2)<Qallp2(rightp2) || (Qallp3(leftp3)<=Qallp3(rightp3) && \
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(Qallp3(leftp3)<Qallp3(rightp3) || Qallp4(leftp4)<Qallp4(rightp4)))))))
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#define Quad_xor_to_intp1(leftp1,rightp1,result) \
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/* quad_floating_point left, right; \
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* unsigned int result; */ \
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result = Qallp1(leftp1) XOR Qallp1(rightp1);
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#define Quad_xor_from_intp1(leftp1,rightp1,result) \
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/* quad_floating_point right, result; \
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* unsigned int left; */ \
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Qallp1(resultp1) = left XOR Qallp1(rightp1)
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#define Quad_swap_lower(leftp1,leftp2,leftp3,leftp4,rightp1,rightp2,rightp3,rightp4) \
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/* quad_floating_point left, right; */ \
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Qallp2(leftp2) = Qallp2(leftp2) XOR Qallp2(rightp2) \
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Qallp2(rightp2) = Qallp2(leftp2) XOR Qallp2(rightp2) \
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Qallp2(leftp2) = Qallp2(leftp2) XOR Qallp2(rightp2) \
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Qallp3(leftp3) = Qallp3(leftp3) XOR Qallp3(rightp3) \
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Qallp3(rightp3) = Qallp3(leftp3) XOR Qallp3(rightp3) \
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Qallp3(leftp3) = Qallp3(leftp3) XOR Qallp3(rightp3) \
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Qallp4(leftp4) = Qallp4(leftp4) XOR Qallp4(rightp4) \
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Qallp4(rightp4) = Qallp4(leftp4) XOR Qallp4(rightp4) \
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Qallp4(leftp4) = Qallp4(leftp4) XOR Qallp4(rightp4)
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int quad_frnd __P((quad_floating_point *, quad_floating_point *, unsigned int *));
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