1/*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This software was developed by the Computer Systems Engineering group
6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7 * contributed to Berkeley.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)quad.h 8.1 (Berkeley) 6/4/93
| 1/*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This software was developed by the Computer Systems Engineering group
6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7 * contributed to Berkeley.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)quad.h 8.1 (Berkeley) 6/4/93
|
34 * $FreeBSD: head/sys/libkern/quad.h 128935 2004-05-04 22:15:54Z cognet $
| 34 * $FreeBSD: head/sys/libkern/quad.h 128965 2004-05-05 15:12:55Z bde $
|
35 */
36
| 35 */
36
|
37#ifndef _LIBKERN_QUAD_H
38#define _LIBKERN_QUAD_H
| 37#ifndef _LIBKERN_QUAD_H_
38#define _LIBKERN_QUAD_H_
|
39
40/*
41 * Quad arithmetic.
42 *
43 * This library makes the following assumptions:
44 *
45 * - The type long long (aka quad_t) exists.
46 *
47 * - A quad variable is exactly twice as long as `long'.
48 *
49 * - The machine's arithmetic is two's complement.
50 *
51 * This library can provide 128-bit arithmetic on a machine with 128-bit
52 * quads and 64-bit longs, for instance, or 96-bit arithmetic on machines
53 * with 48-bit longs.
54 */
55
56#include <sys/cdefs.h>
57#include <sys/types.h>
58#include <sys/limits.h>
59#include <sys/syslimits.h>
60
61/*
62 * Depending on the desired operation, we view a `long long' (aka quad_t) in
63 * one or more of the following formats.
64 */
65union uu {
66 quad_t q; /* as a (signed) quad */
67 quad_t uq; /* as an unsigned quad */
68 long sl[2]; /* as two signed longs */
69 u_long ul[2]; /* as two unsigned longs */
70};
71
72/*
73 * Define high and low longwords.
74 */
75#define H _QUAD_HIGHWORD
76#define L _QUAD_LOWWORD
77
78/*
79 * Total number of bits in a quad_t and in the pieces that make it up.
80 * These are used for shifting, and also below for halfword extraction
81 * and assembly.
82 */
83#define QUAD_BITS (sizeof(quad_t) * CHAR_BIT)
84#define LONG_BITS (sizeof(long) * CHAR_BIT)
85#define HALF_BITS (sizeof(long) * CHAR_BIT / 2)
86
87/*
88 * Extract high and low shortwords from longword, and move low shortword of
89 * longword to upper half of long, i.e., produce the upper longword of
90 * ((quad_t)(x) << (number_of_bits_in_long/2)). (`x' must actually be u_long.)
91 *
92 * These are used in the multiply code, to split a longword into upper
93 * and lower halves, and to reassemble a product as a quad_t, shifted left
94 * (sizeof(long)*CHAR_BIT/2).
95 */
96#define HHALF(x) ((x) >> HALF_BITS)
97#define LHALF(x) ((x) & ((1 << HALF_BITS) - 1))
98#define LHUP(x) ((x) << HALF_BITS)
99
| 39
40/*
41 * Quad arithmetic.
42 *
43 * This library makes the following assumptions:
44 *
45 * - The type long long (aka quad_t) exists.
46 *
47 * - A quad variable is exactly twice as long as `long'.
48 *
49 * - The machine's arithmetic is two's complement.
50 *
51 * This library can provide 128-bit arithmetic on a machine with 128-bit
52 * quads and 64-bit longs, for instance, or 96-bit arithmetic on machines
53 * with 48-bit longs.
54 */
55
56#include <sys/cdefs.h>
57#include <sys/types.h>
58#include <sys/limits.h>
59#include <sys/syslimits.h>
60
61/*
62 * Depending on the desired operation, we view a `long long' (aka quad_t) in
63 * one or more of the following formats.
64 */
65union uu {
66 quad_t q; /* as a (signed) quad */
67 quad_t uq; /* as an unsigned quad */
68 long sl[2]; /* as two signed longs */
69 u_long ul[2]; /* as two unsigned longs */
70};
71
72/*
73 * Define high and low longwords.
74 */
75#define H _QUAD_HIGHWORD
76#define L _QUAD_LOWWORD
77
78/*
79 * Total number of bits in a quad_t and in the pieces that make it up.
80 * These are used for shifting, and also below for halfword extraction
81 * and assembly.
82 */
83#define QUAD_BITS (sizeof(quad_t) * CHAR_BIT)
84#define LONG_BITS (sizeof(long) * CHAR_BIT)
85#define HALF_BITS (sizeof(long) * CHAR_BIT / 2)
86
87/*
88 * Extract high and low shortwords from longword, and move low shortword of
89 * longword to upper half of long, i.e., produce the upper longword of
90 * ((quad_t)(x) << (number_of_bits_in_long/2)). (`x' must actually be u_long.)
91 *
92 * These are used in the multiply code, to split a longword into upper
93 * and lower halves, and to reassemble a product as a quad_t, shifted left
94 * (sizeof(long)*CHAR_BIT/2).
95 */
96#define HHALF(x) ((x) >> HALF_BITS)
97#define LHALF(x) ((x) & ((1 << HALF_BITS) - 1))
98#define LHUP(x) ((x) << HALF_BITS)
99
|
| 100typedef unsigned int qshift_t;
101
102quad_t __ashldi3(quad_t, qshift_t);
103quad_t __ashrdi3(quad_t, qshift_t);
|
100quad_t __divdi3(quad_t a, quad_t b);
| 104quad_t __divdi3(quad_t a, quad_t b);
|
| 105quad_t __lshrdi3(quad_t, qshift_t);
|
101quad_t __moddi3(quad_t a, quad_t b);
102u_quad_t __qdivrem(u_quad_t u, u_quad_t v, u_quad_t *rem);
103u_quad_t __udivdi3(u_quad_t a, u_quad_t b);
104u_quad_t __umoddi3(u_quad_t a, u_quad_t b);
105int __ucmpdi2(u_quad_t a, u_quad_t b);
106
| 106quad_t __moddi3(quad_t a, quad_t b);
107u_quad_t __qdivrem(u_quad_t u, u_quad_t v, u_quad_t *rem);
108u_quad_t __udivdi3(u_quad_t a, u_quad_t b);
109u_quad_t __umoddi3(u_quad_t a, u_quad_t b);
110int __ucmpdi2(u_quad_t a, u_quad_t b);
111
|
107typedef unsigned int qshift_t;
108
109quad_t __ashldi3(quad_t, qshift_t);
110quad_t __ashrdi3(quad_t, qshift_t);
111quad_t __lshrdi3(quad_t, qshift_t);
112#endif /* _LIBKERN_QUAD_H */
| 112#endif /* !_LIBKERN_QUAD_H_ */
|
| |