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Sat Sep 26 23:15:22 2009 UTC (10 years, 11 months ago) by siliconforks
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1 siliconforks 332 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2     /* ***** BEGIN LICENSE BLOCK *****
3     * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4     *
5     * The contents of this file are subject to the Mozilla Public License Version
6     * 1.1 (the "License"); you may not use this file except in compliance with
7     * the License. You may obtain a copy of the License at
8     * http://www.mozilla.org/MPL/
9     *
10     * Software distributed under the License is distributed on an "AS IS" basis,
11     * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12     * for the specific language governing rights and limitations under the
13     * License.
14     *
15     * The Original Code is Mozilla Communicator client code, released
16     * March 31, 1998.
17     *
18     * The Initial Developer of the Original Code is
19     * Netscape Communications Corporation.
20     * Portions created by the Initial Developer are Copyright (C) 1998
21     * the Initial Developer. All Rights Reserved.
22     *
23     * Contributor(s):
24     *
25     * Alternatively, the contents of this file may be used under the terms of
26     * either of the GNU General Public License Version 2 or later (the "GPL"),
27     * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28     * in which case the provisions of the GPL or the LGPL are applicable instead
29     * of those above. If you wish to allow use of your version of this file only
30     * under the terms of either the GPL or the LGPL, and not to allow others to
31     * use your version of this file under the terms of the MPL, indicate your
32     * decision by deleting the provisions above and replace them with the notice
33     * and other provisions required by the GPL or the LGPL. If you do not delete
34     * the provisions above, a recipient may use your version of this file under
35     * the terms of any one of the MPL, the GPL or the LGPL.
36     *
37     * ***** END LICENSE BLOCK ***** */
38    
39     /*
40     ** File: jslong.h
41     ** Description: Portable access to 64 bit numerics
42     **
43     ** Long-long (64-bit signed integer type) support. Some C compilers
44     ** don't support 64 bit integers yet, so we use these macros to
45     ** support both machines that do and don't.
46     **/
47     #ifndef jslong_h___
48     #define jslong_h___
49    
50     #include "jstypes.h"
51    
52     JS_BEGIN_EXTERN_C
53    
54 siliconforks 460 #define JSLL_INIT(hi, lo) ((((JSInt64)(hi)) << 32) + (JSInt64)(lo))
55 siliconforks 332
56     /***********************************************************************
57     ** MACROS: JSLL_*
58     ** DESCRIPTION:
59     ** The following macros define portable access to the 64 bit
60     ** math facilities.
61     **
62     ***********************************************************************/
63    
64     /***********************************************************************
65     ** MACROS: JSLL_<relational operators>
66     **
67     ** JSLL_IS_ZERO Test for zero
68     ** JSLL_EQ Test for equality
69     ** JSLL_NE Test for inequality
70     ** JSLL_GE_ZERO Test for zero or positive
71     ** JSLL_CMP Compare two values
72     ***********************************************************************/
73     #define JSLL_IS_ZERO(a) ((a) == 0)
74     #define JSLL_EQ(a, b) ((a) == (b))
75     #define JSLL_NE(a, b) ((a) != (b))
76     #define JSLL_GE_ZERO(a) ((a) >= 0)
77     #define JSLL_CMP(a, op, b) ((JSInt64)(a) op (JSInt64)(b))
78     #define JSLL_UCMP(a, op, b) ((JSUint64)(a) op (JSUint64)(b))
79    
80     /***********************************************************************
81     ** MACROS: JSLL_<logical operators>
82     **
83     ** JSLL_AND Logical and
84     ** JSLL_OR Logical or
85     ** JSLL_XOR Logical exclusion
86     ** JSLL_OR2 A disgusting deviation
87     ** JSLL_NOT Negation (one's compliment)
88     ***********************************************************************/
89     #define JSLL_AND(r, a, b) ((r) = (a) & (b))
90     #define JSLL_OR(r, a, b) ((r) = (a) | (b))
91     #define JSLL_XOR(r, a, b) ((r) = (a) ^ (b))
92     #define JSLL_OR2(r, a) ((r) = (r) | (a))
93     #define JSLL_NOT(r, a) ((r) = ~(a))
94    
95     /***********************************************************************
96     ** MACROS: JSLL_<mathematical operators>
97     **
98     ** JSLL_NEG Negation (two's compliment)
99     ** JSLL_ADD Summation (two's compliment)
100     ** JSLL_SUB Difference (two's compliment)
101     ***********************************************************************/
102     #define JSLL_NEG(r, a) ((r) = -(a))
103     #define JSLL_ADD(r, a, b) ((r) = (a) + (b))
104     #define JSLL_SUB(r, a, b) ((r) = (a) - (b))
105    
106     /***********************************************************************
107     ** MACROS: JSLL_<mathematical operators>
108     **
109     ** JSLL_MUL Product (two's compliment)
110     ** JSLL_DIV Quotient (two's compliment)
111     ** JSLL_MOD Modulus (two's compliment)
112     ***********************************************************************/
113     #define JSLL_MUL(r, a, b) ((r) = (a) * (b))
114     #define JSLL_DIV(r, a, b) ((r) = (a) / (b))
115     #define JSLL_MOD(r, a, b) ((r) = (a) % (b))
116    
117     /***********************************************************************
118     ** MACROS: JSLL_<shifting operators>
119     **
120     ** JSLL_SHL Shift left [0..64] bits
121     ** JSLL_SHR Shift right [0..64] bits with sign extension
122     ** JSLL_USHR Unsigned shift right [0..64] bits
123     ** JSLL_ISHL Signed shift left [0..64] bits
124     ***********************************************************************/
125     #define JSLL_SHL(r, a, b) ((r) = (JSInt64)(a) << (b))
126     #define JSLL_SHR(r, a, b) ((r) = (JSInt64)(a) >> (b))
127     #define JSLL_USHR(r, a, b) ((r) = (JSUint64)(a) >> (b))
128     #define JSLL_ISHL(r, a, b) ((r) = (JSInt64)(a) << (b))
129    
130     /***********************************************************************
131     ** MACROS: JSLL_<conversion operators>
132     **
133     ** JSLL_L2I Convert to signed 32 bit
134     ** JSLL_L2UI Convert to unsigned 32 bit
135     ** JSLL_L2F Convert to floating point
136     ** JSLL_L2D Convert to floating point
137     ** JSLL_I2L Convert signed to 64 bit
138     ** JSLL_UI2L Convert unsigned to 64 bit
139     ** JSLL_F2L Convert float to 64 bit
140     ** JSLL_D2L Convert float to 64 bit
141     ***********************************************************************/
142     #define JSLL_L2I(i, l) ((i) = (JSInt32)(l))
143     #define JSLL_L2UI(ui, l) ((ui) = (JSUint32)(l))
144     #define JSLL_L2F(f, l) ((f) = (JSFloat64)(l))
145     #define JSLL_L2D(d, l) ((d) = (JSFloat64)(l))
146    
147     #define JSLL_I2L(l, i) ((l) = (JSInt64)(i))
148     #define JSLL_UI2L(l, ui) ((l) = (JSInt64)(ui))
149     #define JSLL_F2L(l, f) ((l) = (JSInt64)(f))
150     #define JSLL_D2L(l, d) ((l) = (JSInt64)(d))
151    
152     /***********************************************************************
153     ** MACROS: JSLL_UDIVMOD
154     ** DESCRIPTION:
155     ** Produce both a quotient and a remainder given an unsigned
156     ** INPUTS: JSUint64 a: The dividend of the operation
157     ** JSUint64 b: The quotient of the operation
158     ** OUTPUTS: JSUint64 *qp: pointer to quotient
159     ** JSUint64 *rp: pointer to remainder
160     ***********************************************************************/
161     #define JSLL_UDIVMOD(qp, rp, a, b) \
162     (*(qp) = ((JSUint64)(a) / (b)), \
163     *(rp) = ((JSUint64)(a) % (b)))
164    
165     JS_END_EXTERN_C
166    
167     #endif /* jslong_h___ */

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