summaryrefslogtreecommitdiffstats
path: root/nsprpub/pr/include/prlong.h
blob: df1f30b081a8af65a315c7e6053d90e8c3af4cf1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
** File:                prlong.h
** Description: Portable access to 64 bit numerics
**
** Long-long (64-bit signed integer type) support. Some C compilers
** don't support 64 bit integers yet, so we use these macros to
** support both machines that do and don't.
**/
#ifndef prlong_h___
#define prlong_h___

#include "prtypes.h"

PR_BEGIN_EXTERN_C

/***********************************************************************
** DEFINES:     LL_MaxInt
**              LL_MinInt
**              LL_Zero
**              LL_MaxUint
** DESCRIPTION:
**      Various interesting constants and static variable
**      initializer
***********************************************************************/
NSPR_API(PRInt64) LL_MaxInt(void);
NSPR_API(PRInt64) LL_MinInt(void);
NSPR_API(PRInt64) LL_Zero(void);
NSPR_API(PRUint64) LL_MaxUint(void);

#if defined(HAVE_LONG_LONG)

/* Keep this in sync with prtypes.h. */
#if PR_BYTES_PER_LONG == 8 && !defined(PR_ALTERNATE_INT64_TYPEDEF)
#define LL_MAXINT   9223372036854775807L
#define LL_MININT   (-LL_MAXINT - 1L)
#define LL_ZERO     0L
#define LL_MAXUINT  18446744073709551615UL
#define LL_INIT(hi, lo)  ((hi ## L << 32) + lo ## L)
#elif defined(WIN32) && !defined(__GNUC__)
#define LL_MAXINT   9223372036854775807i64
#define LL_MININT   (-LL_MAXINT - 1i64)
#define LL_ZERO     0i64
#define LL_MAXUINT  18446744073709551615ui64
#define LL_INIT(hi, lo)  ((hi ## i64 << 32) + lo ## i64)
#else
#define LL_MAXINT   9223372036854775807LL
#define LL_MININT   (-LL_MAXINT - 1LL)
#define LL_ZERO     0LL
#define LL_MAXUINT  18446744073709551615ULL
#define LL_INIT(hi, lo)  ((hi ## LL << 32) + lo ## LL)
#endif

/***********************************************************************
** MACROS:      LL_*
** DESCRIPTION:
**      The following macros define portable access to the 64 bit
**      math facilities.
**
***********************************************************************/

/***********************************************************************
** MACROS:      LL_<relational operators>
**
**  LL_IS_ZERO        Test for zero
**  LL_EQ             Test for equality
**  LL_NE             Test for inequality
**  LL_GE_ZERO        Test for zero or positive
**  LL_CMP            Compare two values
***********************************************************************/
#define LL_IS_ZERO(a)       ((a) == 0)
#define LL_EQ(a, b)         ((a) == (b))
#define LL_NE(a, b)         ((a) != (b))
#define LL_GE_ZERO(a)       ((a) >= 0)
#define LL_CMP(a, op, b)    ((PRInt64)(a) op (PRInt64)(b))
#define LL_UCMP(a, op, b)   ((PRUint64)(a) op (PRUint64)(b))

/***********************************************************************
** MACROS:      LL_<logical operators>
**
**  LL_AND            Logical and
**  LL_OR             Logical or
**  LL_XOR            Logical exclusion
**  LL_OR2            A disgusting deviation
**  LL_NOT            Negation (one's complement)
***********************************************************************/
#define LL_AND(r, a, b)        ((r) = (a) & (b))
#define LL_OR(r, a, b)        ((r) = (a) | (b))
#define LL_XOR(r, a, b)        ((r) = (a) ^ (b))
#define LL_OR2(r, a)        ((r) = (r) | (a))
#define LL_NOT(r, a)        ((r) = ~(a))

/***********************************************************************
** MACROS:      LL_<mathematical operators>
**
**  LL_NEG            Negation (two's complement)
**  LL_ADD            Summation (two's complement)
**  LL_SUB            Difference (two's complement)
***********************************************************************/
#define LL_NEG(r, a)        ((r) = -(a))
#define LL_ADD(r, a, b)     ((r) = (a) + (b))
#define LL_SUB(r, a, b)     ((r) = (a) - (b))

/***********************************************************************
** MACROS:      LL_<mathematical operators>
**
**  LL_MUL            Product (two's complement)
**  LL_DIV            Quotient (two's complement)
**  LL_MOD            Modulus (two's complement)
***********************************************************************/
#define LL_MUL(r, a, b)        ((r) = (a) * (b))
#define LL_DIV(r, a, b)        ((r) = (a) / (b))
#define LL_MOD(r, a, b)        ((r) = (a) % (b))

/***********************************************************************
** MACROS:      LL_<shifting operators>
**
**  LL_SHL            Shift left [0..64] bits
**  LL_SHR            Shift right [0..64] bits with sign extension
**  LL_USHR           Unsigned shift right [0..64] bits
**  LL_ISHL           Signed shift left [0..64] bits
***********************************************************************/
#define LL_SHL(r, a, b)     ((r) = (PRInt64)(a) << (b))
#define LL_SHR(r, a, b)     ((r) = (PRInt64)(a) >> (b))
#define LL_USHR(r, a, b)    ((r) = (PRUint64)(a) >> (b))
#define LL_ISHL(r, a, b)    ((r) = (PRInt64)(a) << (b))

/***********************************************************************
** MACROS:      LL_<conversion operators>
**
**  LL_L2I            Convert to signed 32 bit
**  LL_L2UI           Convert to unsigned 32 bit
**  LL_L2F            Convert to floating point
**  LL_L2D            Convert to floating point
**  LL_I2L            Convert signed to 64 bit
**  LL_UI2L           Convert unsigned to 64 bit
**  LL_F2L            Convert float to 64 bit
**  LL_D2L            Convert float to 64 bit
***********************************************************************/
#define LL_L2I(i, l)        ((i) = (PRInt32)(l))
#define LL_L2UI(ui, l)        ((ui) = (PRUint32)(l))
#define LL_L2F(f, l)        ((f) = (PRFloat64)(l))
#define LL_L2D(d, l)        ((d) = (PRFloat64)(l))

#define LL_I2L(l, i)        ((l) = (PRInt64)(i))
#define LL_UI2L(l, ui)        ((l) = (PRInt64)(ui))
#define LL_F2L(l, f)        ((l) = (PRInt64)(f))
#define LL_D2L(l, d)        ((l) = (PRInt64)(d))

/***********************************************************************
** MACROS:      LL_UDIVMOD
** DESCRIPTION:
**  Produce both a quotient and a remainder given an unsigned 
** INPUTS:      PRUint64 a: The dividend of the operation
**              PRUint64 b: The quotient of the operation
** OUTPUTS:     PRUint64 *qp: pointer to quotient
**              PRUint64 *rp: pointer to remainder
***********************************************************************/
#define LL_UDIVMOD(qp, rp, a, b) \
    (*(qp) = ((PRUint64)(a) / (b)), \
     *(rp) = ((PRUint64)(a) % (b)))

#else  /* !HAVE_LONG_LONG */

#define LL_MAXINT   LL_MaxInt()
#define LL_MININT   LL_MinInt()
#define LL_ZERO     LL_Zero()
#define LL_MAXUINT  LL_MaxUint()

#ifdef IS_LITTLE_ENDIAN
#define LL_INIT(hi, lo) {PR_UINT32(lo), PR_UINT32(hi)}
#else
#define LL_INIT(hi, lo) {PR_UINT32(hi), PR_UINT32(lo)}
#endif

#define LL_IS_ZERO(a)        (((a).hi == 0) && ((a).lo == 0))
#define LL_EQ(a, b)        (((a).hi == (b).hi) && ((a).lo == (b).lo))
#define LL_NE(a, b)        (((a).hi != (b).hi) || ((a).lo != (b).lo))
#define LL_GE_ZERO(a)        (((a).hi >> 31) == 0)

#define LL_CMP(a, op, b)    (((a).hi == (b).hi) ? ((a).lo op (b).lo) : \
                 ((PRInt32)(a).hi op (PRInt32)(b).hi))
#define LL_UCMP(a, op, b)    (((a).hi == (b).hi) ? ((a).lo op (b).lo) : \
                 ((a).hi op (b).hi))

#define LL_AND(r, a, b)        ((r).lo = (a).lo & (b).lo, \
                 (r).hi = (a).hi & (b).hi)
#define LL_OR(r, a, b)        ((r).lo = (a).lo | (b).lo, \
                 (r).hi = (a).hi | (b).hi)
#define LL_XOR(r, a, b)        ((r).lo = (a).lo ^ (b).lo, \
                 (r).hi = (a).hi ^ (b).hi)
#define LL_OR2(r, a)        ((r).lo = (r).lo | (a).lo, \
                 (r).hi = (r).hi | (a).hi)
#define LL_NOT(r, a)        ((r).lo = ~(a).lo, \
                 (r).hi = ~(a).hi)

#define LL_NEG(r, a)        ((r).lo = -(PRInt32)(a).lo, \
                 (r).hi = -(PRInt32)(a).hi - ((r).lo != 0))
#define LL_ADD(r, a, b) { \
    PRInt64 _a, _b; \
    _a = a; _b = b; \
    (r).lo = _a.lo + _b.lo; \
    (r).hi = _a.hi + _b.hi + ((r).lo < _b.lo); \
}

#define LL_SUB(r, a, b) { \
    PRInt64 _a, _b; \
    _a = a; _b = b; \
    (r).lo = _a.lo - _b.lo; \
    (r).hi = _a.hi - _b.hi - (_a.lo < _b.lo); \
}

#define LL_MUL(r, a, b) { \
    PRInt64 _a, _b; \
    _a = a; _b = b; \
    LL_MUL32(r, _a.lo, _b.lo); \
    (r).hi += _a.hi * _b.lo + _a.lo * _b.hi; \
}

#define _lo16(a)        ((a) & PR_BITMASK(16))
#define _hi16(a)        ((a) >> 16)

#define LL_MUL32(r, a, b) { \
     PRUint32 _a1, _a0, _b1, _b0, _y0, _y1, _y2, _y3; \
     _a1 = _hi16(a), _a0 = _lo16(a); \
     _b1 = _hi16(b), _b0 = _lo16(b); \
     _y0 = _a0 * _b0; \
     _y1 = _a0 * _b1; \
     _y2 = _a1 * _b0; \
     _y3 = _a1 * _b1; \
     _y1 += _hi16(_y0);                         /* can't carry */ \
     _y1 += _y2;                                /* might carry */ \
     if (_y1 < _y2)    \
        _y3 += (PRUint32)(PR_BIT(16));  /* propagate */ \
     (r).lo = (_lo16(_y1) << 16) + _lo16(_y0); \
     (r).hi = _y3 + _hi16(_y1); \
}

#define LL_UDIVMOD(qp, rp, a, b)    ll_udivmod(qp, rp, a, b)

NSPR_API(void) ll_udivmod(PRUint64 *qp, PRUint64 *rp, PRUint64 a, PRUint64 b);

#define LL_DIV(r, a, b) { \
    PRInt64 _a, _b; \
    PRUint32 _negative = (PRInt32)(a).hi < 0; \
    if (_negative) { \
    LL_NEG(_a, a); \
    } else { \
    _a = a; \
    } \
    if ((PRInt32)(b).hi < 0) { \
    _negative ^= 1; \
    LL_NEG(_b, b); \
    } else { \
    _b = b; \
    } \
    LL_UDIVMOD(&(r), 0, _a, _b); \
    if (_negative) \
    LL_NEG(r, r); \
}

#define LL_MOD(r, a, b) { \
    PRInt64 _a, _b; \
    PRUint32 _negative = (PRInt32)(a).hi < 0; \
    if (_negative) { \
    LL_NEG(_a, a); \
    } else { \
    _a = a; \
    } \
    if ((PRInt32)(b).hi < 0) { \
    LL_NEG(_b, b); \
    } else { \
    _b = b; \
    } \
    LL_UDIVMOD(0, &(r), _a, _b); \
    if (_negative) \
    LL_NEG(r, r); \
}

#define LL_SHL(r, a, b) { \
    if (b) { \
    PRInt64 _a; \
        _a = a; \
        if ((b) < 32) { \
        (r).lo = _a.lo << ((b) & 31); \
        (r).hi = (_a.hi << ((b) & 31)) | (_a.lo >> (32 - (b))); \
    } else { \
        (r).lo = 0; \
        (r).hi = _a.lo << ((b) & 31); \
    } \
    } else { \
    (r) = (a); \
    } \
}

/* a is an PRInt32, b is PRInt32, r is PRInt64 */
#define LL_ISHL(r, a, b) { \
    if (b) { \
    PRInt64 _a; \
    _a.lo = (a); \
    _a.hi = 0; \
        if ((b) < 32) { \
        (r).lo = (a) << ((b) & 31); \
        (r).hi = ((a) >> (32 - (b))); \
    } else { \
        (r).lo = 0; \
        (r).hi = (a) << ((b) & 31); \
    } \
    } else { \
    (r).lo = (a); \
    (r).hi = 0; \
    } \
}

#define LL_SHR(r, a, b) { \
    if (b) { \
    PRInt64 _a; \
        _a = a; \
    if ((b) < 32) { \
        (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
        (r).hi = (PRInt32)_a.hi >> ((b) & 31); \
    } else { \
        (r).lo = (PRInt32)_a.hi >> ((b) & 31); \
        (r).hi = (PRInt32)_a.hi >> 31; \
    } \
    } else { \
    (r) = (a); \
    } \
}

#define LL_USHR(r, a, b) { \
    if (b) { \
    PRInt64 _a; \
        _a = a; \
    if ((b) < 32) { \
        (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
        (r).hi = _a.hi >> ((b) & 31); \
    } else { \
        (r).lo = _a.hi >> ((b) & 31); \
        (r).hi = 0; \
    } \
    } else { \
    (r) = (a); \
    } \
}

#define LL_L2I(i, l)        ((i) = (l).lo)
#define LL_L2UI(ui, l)        ((ui) = (l).lo)
#define LL_L2F(f, l)        { double _d; LL_L2D(_d, l); (f) = (PRFloat64)_d; }

#define LL_L2D(d, l) { \
    int _negative; \
    PRInt64 _absval; \
 \
    _negative = (l).hi >> 31; \
    if (_negative) { \
    LL_NEG(_absval, l); \
    } else { \
    _absval = l; \
    } \
    (d) = (double)_absval.hi * 4.294967296e9 + _absval.lo; \
    if (_negative) \
    (d) = -(d); \
}

#define LL_I2L(l, i)        { PRInt32 _i = ((PRInt32)(i)) >> 31; (l).lo = (i); (l).hi = _i; }
#define LL_UI2L(l, ui)      ((l).lo = (ui), (l).hi = 0)
#define LL_F2L(l, f)        { double _d = (double)f; LL_D2L(l, _d); }

#define LL_D2L(l, d) { \
    int _negative; \
    double _absval, _d_hi; \
    PRInt64 _lo_d; \
 \
    _negative = ((d) < 0); \
    _absval = _negative ? -(d) : (d); \
 \
    (l).hi = _absval / 4.294967296e9; \
    (l).lo = 0; \
    LL_L2D(_d_hi, l); \
    _absval -= _d_hi; \
    _lo_d.hi = 0; \
    if (_absval < 0) { \
    _lo_d.lo = -_absval; \
    LL_SUB(l, l, _lo_d); \
    } else { \
    _lo_d.lo = _absval; \
    LL_ADD(l, l, _lo_d); \
    } \
 \
    if (_negative) \
    LL_NEG(l, l); \
}

#endif /* !HAVE_LONG_LONG */

PR_END_EXTERN_C

#endif /* prlong_h___ */