1
/* -*- 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
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/
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
15
* The Original Code is Mozilla Communicator client code, released
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.
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.
37
* ***** END LICENSE BLOCK ***** */
41
** Description: Portable access to 64 bit numerics
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.
54
/***********************************************************************
55
** DEFINES: JSLL_MaxInt
59
** Various interesting constants and static variable
61
***********************************************************************/
62
#ifdef HAVE_WATCOM_BUG_2
63
JSInt64 __pascal __loadds __export
65
JSInt64 __pascal __loadds __export
67
JSInt64 __pascal __loadds __export
70
extern JS_PUBLIC_API(JSInt64) JSLL_MaxInt(void);
71
extern JS_PUBLIC_API(JSInt64) JSLL_MinInt(void);
72
extern JS_PUBLIC_API(JSInt64) JSLL_Zero(void);
75
#define JSLL_MAXINT JSLL_MaxInt()
76
#define JSLL_MININT JSLL_MinInt()
77
#define JSLL_ZERO JSLL_Zero()
79
#ifdef JS_HAVE_LONG_LONG
81
#if JS_BYTES_PER_LONG == 8
82
#define JSLL_INIT(hi, lo) ((hi ## L << 32) + lo ## L)
83
#elif (defined(WIN32) || defined(WIN16)) && !defined(__GNUC__)
84
#define JSLL_INIT(hi, lo) ((hi ## i64 << 32) + lo ## i64)
86
#define JSLL_INIT(hi, lo) ((hi ## LL << 32) + lo ## LL)
89
/***********************************************************************
92
** The following macros define portable access to the 64 bit
95
***********************************************************************/
97
/***********************************************************************
98
** MACROS: JSLL_<relational operators>
100
** JSLL_IS_ZERO Test for zero
101
** JSLL_EQ Test for equality
102
** JSLL_NE Test for inequality
103
** JSLL_GE_ZERO Test for zero or positive
104
** JSLL_CMP Compare two values
105
***********************************************************************/
106
#define JSLL_IS_ZERO(a) ((a) == 0)
107
#define JSLL_EQ(a, b) ((a) == (b))
108
#define JSLL_NE(a, b) ((a) != (b))
109
#define JSLL_GE_ZERO(a) ((a) >= 0)
110
#define JSLL_CMP(a, op, b) ((JSInt64)(a) op (JSInt64)(b))
111
#define JSLL_UCMP(a, op, b) ((JSUint64)(a) op (JSUint64)(b))
113
/***********************************************************************
114
** MACROS: JSLL_<logical operators>
116
** JSLL_AND Logical and
117
** JSLL_OR Logical or
118
** JSLL_XOR Logical exclusion
119
** JSLL_OR2 A disgusting deviation
120
** JSLL_NOT Negation (one's compliment)
121
***********************************************************************/
122
#define JSLL_AND(r, a, b) ((r) = (a) & (b))
123
#define JSLL_OR(r, a, b) ((r) = (a) | (b))
124
#define JSLL_XOR(r, a, b) ((r) = (a) ^ (b))
125
#define JSLL_OR2(r, a) ((r) = (r) | (a))
126
#define JSLL_NOT(r, a) ((r) = ~(a))
128
/***********************************************************************
129
** MACROS: JSLL_<mathematical operators>
131
** JSLL_NEG Negation (two's compliment)
132
** JSLL_ADD Summation (two's compliment)
133
** JSLL_SUB Difference (two's compliment)
134
***********************************************************************/
135
#define JSLL_NEG(r, a) ((r) = -(a))
136
#define JSLL_ADD(r, a, b) ((r) = (a) + (b))
137
#define JSLL_SUB(r, a, b) ((r) = (a) - (b))
139
/***********************************************************************
140
** MACROS: JSLL_<mathematical operators>
142
** JSLL_MUL Product (two's compliment)
143
** JSLL_DIV Quotient (two's compliment)
144
** JSLL_MOD Modulus (two's compliment)
145
***********************************************************************/
146
#define JSLL_MUL(r, a, b) ((r) = (a) * (b))
147
#define JSLL_DIV(r, a, b) ((r) = (a) / (b))
148
#define JSLL_MOD(r, a, b) ((r) = (a) % (b))
150
/***********************************************************************
151
** MACROS: JSLL_<shifting operators>
153
** JSLL_SHL Shift left [0..64] bits
154
** JSLL_SHR Shift right [0..64] bits with sign extension
155
** JSLL_USHR Unsigned shift right [0..64] bits
156
** JSLL_ISHL Signed shift left [0..64] bits
157
***********************************************************************/
158
#define JSLL_SHL(r, a, b) ((r) = (JSInt64)(a) << (b))
159
#define JSLL_SHR(r, a, b) ((r) = (JSInt64)(a) >> (b))
160
#define JSLL_USHR(r, a, b) ((r) = (JSUint64)(a) >> (b))
161
#define JSLL_ISHL(r, a, b) ((r) = (JSInt64)(a) << (b))
163
/***********************************************************************
164
** MACROS: JSLL_<conversion operators>
166
** JSLL_L2I Convert to signed 32 bit
167
** JSLL_L2UI Convert to unsigned 32 bit
168
** JSLL_L2F Convert to floating point
169
** JSLL_L2D Convert to floating point
170
** JSLL_I2L Convert signed to 64 bit
171
** JSLL_UI2L Convert unsigned to 64 bit
172
** JSLL_F2L Convert float to 64 bit
173
** JSLL_D2L Convert float to 64 bit
174
***********************************************************************/
175
#define JSLL_L2I(i, l) ((i) = (JSInt32)(l))
176
#define JSLL_L2UI(ui, l) ((ui) = (JSUint32)(l))
177
#define JSLL_L2F(f, l) ((f) = (JSFloat64)(l))
178
#define JSLL_L2D(d, l) ((d) = (JSFloat64)(l))
180
#define JSLL_I2L(l, i) ((l) = (JSInt64)(i))
181
#define JSLL_UI2L(l, ui) ((l) = (JSInt64)(ui))
182
#define JSLL_F2L(l, f) ((l) = (JSInt64)(f))
183
#define JSLL_D2L(l, d) ((l) = (JSInt64)(d))
185
/***********************************************************************
186
** MACROS: JSLL_UDIVMOD
188
** Produce both a quotient and a remainder given an unsigned
189
** INPUTS: JSUint64 a: The dividend of the operation
190
** JSUint64 b: The quotient of the operation
191
** OUTPUTS: JSUint64 *qp: pointer to quotient
192
** JSUint64 *rp: pointer to remainder
193
***********************************************************************/
194
#define JSLL_UDIVMOD(qp, rp, a, b) \
195
(*(qp) = ((JSUint64)(a) / (b)), \
196
*(rp) = ((JSUint64)(a) % (b)))
198
#else /* !JS_HAVE_LONG_LONG */
200
#ifdef IS_LITTLE_ENDIAN
201
#define JSLL_INIT(hi, lo) {JS_INT32(lo), JS_INT32(hi)}
203
#define JSLL_INIT(hi, lo) {JS_INT32(hi), JS_INT32(lo)}
206
#define JSLL_IS_ZERO(a) (((a).hi == 0) && ((a).lo == 0))
207
#define JSLL_EQ(a, b) (((a).hi == (b).hi) && ((a).lo == (b).lo))
208
#define JSLL_NE(a, b) (((a).hi != (b).hi) || ((a).lo != (b).lo))
209
#define JSLL_GE_ZERO(a) (((a).hi >> 31) == 0)
212
#define JSLL_CMP(a, op, b) (JS_ASSERT((#op)[1] != '='), JSLL_REAL_CMP(a, op, b))
213
#define JSLL_UCMP(a, op, b) (JS_ASSERT((#op)[1] != '='), JSLL_REAL_UCMP(a, op, b))
215
#define JSLL_CMP(a, op, b) JSLL_REAL_CMP(a, op, b)
216
#define JSLL_UCMP(a, op, b) JSLL_REAL_UCMP(a, op, b)
219
#define JSLL_REAL_CMP(a,op,b) (((JSInt32)(a).hi op (JSInt32)(b).hi) || \
220
(((a).hi == (b).hi) && ((a).lo op (b).lo)))
221
#define JSLL_REAL_UCMP(a,op,b) (((a).hi op (b).hi) || \
222
(((a).hi == (b).hi) && ((a).lo op (b).lo)))
224
#define JSLL_AND(r, a, b) ((r).lo = (a).lo & (b).lo, \
225
(r).hi = (a).hi & (b).hi)
226
#define JSLL_OR(r, a, b) ((r).lo = (a).lo | (b).lo, \
227
(r).hi = (a).hi | (b).hi)
228
#define JSLL_XOR(r, a, b) ((r).lo = (a).lo ^ (b).lo, \
229
(r).hi = (a).hi ^ (b).hi)
230
#define JSLL_OR2(r, a) ((r).lo = (r).lo | (a).lo, \
231
(r).hi = (r).hi | (a).hi)
232
#define JSLL_NOT(r, a) ((r).lo = ~(a).lo, \
235
#define JSLL_NEG(r, a) ((r).lo = -(JSInt32)(a).lo, \
236
(r).hi = -(JSInt32)(a).hi - ((r).lo != 0))
237
#define JSLL_ADD(r, a, b) { \
240
(r).lo = _a.lo + _b.lo; \
241
(r).hi = _a.hi + _b.hi + ((r).lo < _b.lo); \
244
#define JSLL_SUB(r, a, b) { \
247
(r).lo = _a.lo - _b.lo; \
248
(r).hi = _a.hi - _b.hi - (_a.lo < _b.lo); \
251
#define JSLL_MUL(r, a, b) { \
254
JSLL_MUL32(r, _a.lo, _b.lo); \
255
(r).hi += _a.hi * _b.lo + _a.lo * _b.hi; \
258
#define jslo16(a) ((a) & JS_BITMASK(16))
259
#define jshi16(a) ((a) >> 16)
261
#define JSLL_MUL32(r, a, b) { \
262
JSUint32 _a1, _a0, _b1, _b0, _y0, _y1, _y2, _y3; \
263
_a1 = jshi16(a), _a0 = jslo16(a); \
264
_b1 = jshi16(b), _b0 = jslo16(b); \
269
_y1 += jshi16(_y0); /* can't carry */ \
270
_y1 += _y2; /* might carry */ \
272
_y3 += (JSUint32)(JS_BIT(16)); /* propagate */ \
273
(r).lo = (jslo16(_y1) << 16) + jslo16(_y0); \
274
(r).hi = _y3 + jshi16(_y1); \
277
#define JSLL_UDIVMOD(qp, rp, a, b) jsll_udivmod(qp, rp, a, b)
279
extern JS_PUBLIC_API(void) jsll_udivmod(JSUint64 *qp, JSUint64 *rp, JSUint64 a, JSUint64 b);
281
#define JSLL_DIV(r, a, b) { \
283
JSUint32 _negative = (JSInt32)(a).hi < 0; \
289
if ((JSInt32)(b).hi < 0) { \
295
JSLL_UDIVMOD(&(r), 0, _a, _b); \
300
#define JSLL_MOD(r, a, b) { \
302
JSUint32 _negative = (JSInt32)(a).hi < 0; \
308
if ((JSInt32)(b).hi < 0) { \
313
JSLL_UDIVMOD(0, &(r), _a, _b); \
318
#define JSLL_SHL(r, a, b) { \
323
(r).lo = _a.lo << ((b) & 31); \
324
(r).hi = (_a.hi << ((b) & 31)) | (_a.lo >> (32 - (b))); \
327
(r).hi = _a.lo << ((b) & 31); \
334
/* a is an JSInt32, b is JSInt32, r is JSInt64 */
335
#define JSLL_ISHL(r, a, b) { \
341
(r).lo = (a) << ((b) & 31); \
342
(r).hi = ((a) >> (32 - (b))); \
345
(r).hi = (a) << ((b) & 31); \
353
#define JSLL_SHR(r, a, b) { \
358
(r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
359
(r).hi = (JSInt32)_a.hi >> ((b) & 31); \
361
(r).lo = (JSInt32)_a.hi >> ((b) & 31); \
362
(r).hi = (JSInt32)_a.hi >> 31; \
369
#define JSLL_USHR(r, a, b) { \
374
(r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31)); \
375
(r).hi = _a.hi >> ((b) & 31); \
377
(r).lo = _a.hi >> ((b) & 31); \
385
#define JSLL_L2I(i, l) ((i) = (l).lo)
386
#define JSLL_L2UI(ui, l) ((ui) = (l).lo)
387
#define JSLL_L2F(f, l) { double _d; JSLL_L2D(_d, l); (f) = (JSFloat64)_d; }
389
#define JSLL_L2D(d, l) { \
393
_negative = (l).hi >> 31; \
395
JSLL_NEG(_absval, l); \
399
(d) = (double)_absval.hi * 4.294967296e9 + _absval.lo; \
404
#define JSLL_I2L(l, i) { JSInt32 _i = (i) >> 31; (l).lo = (i); (l).hi = _i; }
405
#define JSLL_UI2L(l, ui) ((l).lo = (ui), (l).hi = 0)
406
#define JSLL_F2L(l, f) { double _d = (double)f; JSLL_D2L(l, _d); }
408
#define JSLL_D2L(l, d) { \
410
double _absval, _d_hi; \
413
_negative = ((d) < 0); \
414
_absval = _negative ? -(d) : (d); \
416
(l).hi = _absval / 4.294967296e9; \
418
JSLL_L2D(_d_hi, l); \
422
_lo_d.lo = -_absval; \
423
JSLL_SUB(l, l, _lo_d); \
425
_lo_d.lo = _absval; \
426
JSLL_ADD(l, l, _lo_d); \
433
#endif /* !JS_HAVE_LONG_LONG */
437
#endif /* jslong_h___ */
added
removed
src/dom/js/jslong.h
