quad_float.h revision 1.1 
1/*
2 * Copyright 1996 1995 by Open Software Foundation, Inc.
3 *              All Rights Reserved
4 *
5 * Permission to use, copy, modify, and distribute this software and
6 * its documentation for any purpose and without fee is hereby granted,
7 * provided that the above copyright notice appears in all copies and
8 * that both the copyright notice and this permission notice appear in
9 * supporting documentation.
10 *
11 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
12 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE.
14 *
15 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
16 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
17 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
18 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
19 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 *
21 */
22/*
23 * pmk1.1
24 */
25/*
26 * (c) Copyright 1986 HEWLETT-PACKARD COMPANY
27 *
28 * To anyone who acknowledges that this file is provided "AS IS"
29 * without any express or implied warranty:
30 *     permission to use, copy, modify, and distribute this file
31 * for any purpose is hereby granted without fee, provided that
32 * the above copyright notice and this notice appears in all
33 * copies, and that the name of Hewlett-Packard Company not be
34 * used in advertising or publicity pertaining to distribution
35 * of the software without specific, written prior permission.
36 * Hewlett-Packard Company makes no representations about the
37 * suitability of this software for any purpose.
38 */
39/*
40 * @(#)quad_float.h: $Revision: 1.1 $ $Date: 1998/06/23 20:34:05 $
41 * $Locker:  $
42 *
43 */
44/******************************
45 *  Quad precision functions  *
46 ******************************/
47
48/* 32-bit word grabing functions */
49#define Quad_firstword(value) Qallp1(value)
50#define Quad_secondword(value) Qallp2(value)
51#define Quad_thirdword(value)  Qallp3(value)
52#define Quad_fourthword(value)  Qallp4(value)
53
54
55/* This magnitude comparison uses the signless first words and
56 * the regular part2 words.  The comparison is graphically:
57 *
58 *       1st greater?  ----------->|
59 *                                 |
60 *       1st less?-----------------+------->|
61 *                                 |        |
62 *       2nd greater?------------->|        |
63 *                                 |        |
64 *       2nd less?-----------------+------->|
65 *                                 |        |
66 *       3rd greater?------------->|        |
67 *                                 |        |
68 *       3rd less?-----------------+------->|
69 *                                 |        |
70 *       4th greater or equal?---->|        |
71 *                                 |        |
72 *                               False     True
73 */
74#define Quad_ismagnitudeless(leftp3,leftp4,rightp1,rightp2,rightp3,rightp4,signlessleft,signlessright) \
75/*  Quad_floating_point left, right;          *				\
76 *  unsigned int signlessleft, signlessright; */			\
77      ( signlessleft<=signlessright &&					\
78       (signlessleft<signlessright || (Qallp2(leftp2)<=Qallp2(rightp2) && \
79        (Qallp2(leftp2)<Qallp2(rightp2) || (Qallp3(leftp3)<=Qallp3(rightp3) && \
80	 (Qallp3(leftp3)<Qallp3(rightp3) || Qallp4(leftp4)<Qallp4(rightp4)))))))
81
82#define Quad_xor_to_intp1(leftp1,rightp1,result)		\
83    /* quad_floating_point left, right;				\
84     * unsigned int result; */					\
85    result = Qallp1(leftp1) XOR Qallp1(rightp1);
86
87#define Quad_xor_from_intp1(leftp1,rightp1,result)		\
88    /* quad_floating_point right, result;			\
89     * unsigned int left; */					\
90    Qallp1(resultp1) = left XOR Qallp1(rightp1)
91
92#define Quad_swap_lower(leftp1,leftp2,leftp3,leftp4,rightp1,rightp2,rightp3,rightp4)  \
93    /* quad_floating_point left, right; */			\
94    Qallp2(leftp2)  = Qallp2(leftp2) XOR Qallp2(rightp2)	\
95    Qallp2(rightp2) = Qallp2(leftp2) XOR Qallp2(rightp2)	\
96    Qallp2(leftp2)  = Qallp2(leftp2) XOR Qallp2(rightp2)	\
97    Qallp3(leftp3)  = Qallp3(leftp3) XOR Qallp3(rightp3)	\
98    Qallp3(rightp3) = Qallp3(leftp3) XOR Qallp3(rightp3)	\
99    Qallp3(leftp3)  = Qallp3(leftp3) XOR Qallp3(rightp3)	\
100    Qallp4(leftp4)  = Qallp4(leftp4) XOR Qallp4(rightp4)	\
101    Qallp4(rightp4) = Qallp4(leftp4) XOR Qallp4(rightp4)	\
102    Qallp4(leftp4)  = Qallp4(leftp4) XOR Qallp4(rightp4)
103