rt/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_Number.js
author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
Wed, 27 Jan 2016 21:37:10 +0100
changeset 1872 df5db062f180
parent 1871 bcbc4c03d35d
child 1873 9af63c578721
permissions -rw-r--r--
Speeding up sieve with long numbers by directly resolving high32
Martin@438
     1
// empty line needed here
Martin@439
     2
jaroslav@912
     3
(function(numberPrototype) {
jaroslav@1857
     4
    function add32(x, y) {
jaroslav@1857
     5
        return (x + y) | 0;
jaroslav@912
     6
    };
jaroslav@1858
     7
    function mul32(x, y) {
jaroslav@1858
     8
        return (((x * (y >> 16)) << 16) + x * (y & 0xFFFF)) | 0;
jaroslav@912
     9
    };
jaroslav@912
    10
    var __m32 = 0xFFFFFFFF;
Martin@582
    11
jaroslav@912
    12
    numberPrototype.next32 = function(low) {
jaroslav@912
    13
        if (this === 0) {
jaroslav@912
    14
            return low;
jaroslav@912
    15
        }
jaroslav@912
    16
        var l = new Number(low);
jaroslav@912
    17
        l.hi = this | 0;
jaroslav@912
    18
        return l;
jaroslav@912
    19
    };
lubomir@778
    20
jaroslav@912
    21
    numberPrototype.high32 = function() {
jaroslav@1872
    22
        return high32(this);
jaroslav@1872
    23
    };
jaroslav@1872
    24
    function high32(x) {
jaroslav@1872
    25
        return x.hi ? x.hi : (Math.floor(x / (__m32 + 1))) | 0;
jaroslav@912
    26
    };
jaroslav@912
    27
    numberPrototype.toFP = function() {
jaroslav@912
    28
        return this.hi ? this.hi * (__m32 + 1) + this : this;
jaroslav@912
    29
    };
jaroslav@912
    30
    numberPrototype.toLong = function() {
jaroslav@912
    31
        var hi = (this / (__m32 + 1)) | 0;
jaroslav@912
    32
        var low = (this % (__m32 + 1)) | 0;
jaroslav@912
    33
        if (low < 0) {
jaroslav@912
    34
            low += __m32 + 1;
jaroslav@912
    35
        }
Martin@607
    36
jaroslav@912
    37
        if (this < 0) {
jaroslav@912
    38
            hi -= 1;
Martin@698
    39
        }
Martin@607
    40
Martin@615
    41
        return hi.next32(low);
Martin@615
    42
    };
Martin@615
    43
jaroslav@912
    44
    numberPrototype.toExactString = function() {
jaroslav@912
    45
        if (this.hi) {
jaroslav@912
    46
            // check for Long.MIN_VALUE
jaroslav@912
    47
            if ((this.hi == (0x80000000 | 0)) && (this == 0)) {
jaroslav@912
    48
                return '-9223372036854775808';
jaroslav@912
    49
            }
jaroslav@912
    50
            var res = 0;
jaroslav@912
    51
            var a = [6, 9, 2, 7, 6, 9, 4, 9, 2, 4];
jaroslav@912
    52
            var s = '';
jaroslav@912
    53
            var digit;
jaroslav@912
    54
            var neg = this.hi < 0;
jaroslav@912
    55
            if (neg) {
jaroslav@1870
    56
                var x = neg64(this);
jaroslav@912
    57
                var hi = x.hi;
jaroslav@912
    58
                var low = x;
jaroslav@912
    59
            } else {
jaroslav@912
    60
                var hi = this.hi;
jaroslav@912
    61
                var low = this;
jaroslav@912
    62
            }
jaroslav@912
    63
            for (var i = 0; i < a.length; i++) {
jaroslav@912
    64
                res += hi * a[i];
jaroslav@912
    65
                var low_digit = low % 10;
jaroslav@912
    66
                digit = (res % 10) + low_digit;
jaroslav@912
    67
jaroslav@912
    68
                low = Math.floor(low / 10);
jaroslav@912
    69
                res = Math.floor(res / 10);
jaroslav@912
    70
jaroslav@912
    71
                if (digit >= 10) {
jaroslav@912
    72
                    digit -= 10;
jaroslav@912
    73
                    res++;
jaroslav@912
    74
                }
jaroslav@912
    75
                s = String(digit).concat(s);
jaroslav@912
    76
            }
jaroslav@912
    77
            s = String(res).concat(s).replace(/^0+/, '');
jaroslav@912
    78
            return (neg ? '-' : '').concat(s);
jaroslav@912
    79
        }
jaroslav@912
    80
        return String(this);
jaroslav@912
    81
    };
jaroslav@912
    82
jaroslav@1867
    83
    function add64(x, y) {
jaroslav@1867
    84
        var low = x + y;
jaroslav@912
    85
        carry = 0;
jaroslav@912
    86
        if (low > __m32) {
jaroslav@912
    87
            carry = 1;
jaroslav@912
    88
            low -= (__m32 + 1);
jaroslav@912
    89
        }
jaroslav@1872
    90
        var hi = (high32(x) + high32(y) + carry) | 0;
Martin@627
    91
        return hi.next32(low);
Martin@627
    92
    };
Martin@627
    93
jaroslav@1867
    94
    function sub64(x, y) {
jaroslav@1867
    95
        var low = x - y;
jaroslav@912
    96
        carry = 0;
jaroslav@912
    97
        if (low < 0) {
jaroslav@912
    98
            carry = 1;
jaroslav@912
    99
            low += (__m32 + 1);
jaroslav@912
   100
        }
jaroslav@1872
   101
        var hi = (high32(x) - high32(y) - carry) | 0;
Martin@628
   102
        return hi.next32(low);
Martin@628
   103
    };
Martin@628
   104
jaroslav@1867
   105
    function mul64(x, y) {
jaroslav@1867
   106
        var low = mul32(x, y);
jaroslav@912
   107
        low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@1867
   108
        // first count upper 32 bits of (x.low * x.low)
jaroslav@912
   109
        var hi_hi = 0;
jaroslav@912
   110
        var hi_low = 0;
jaroslav@912
   111
        var m = 1;
jaroslav@912
   112
        for (var i = 0; i < 32; i++) {
jaroslav@1867
   113
            if (y & m) {
jaroslav@1867
   114
                hi_hi += x >>> 16;
jaroslav@1867
   115
                hi_low += x & 0xFFFF
jaroslav@912
   116
            }
jaroslav@912
   117
            hi_low >>= 1;
jaroslav@912
   118
            hi_low += (hi_hi & 1) ? 0x8000 : 0;
jaroslav@912
   119
            hi_hi >>= 1;
jaroslav@912
   120
            m <<= 1;
jaroslav@912
   121
        }
jaroslav@912
   122
        var hi = (hi_hi << 16) + hi_low;
jaroslav@912
   123
jaroslav@1872
   124
        var m1 = mul32(high32(x), y);
jaroslav@1872
   125
        var m2 = mul32(x, high32(y));
jaroslav@1857
   126
        hi = add32(add32(hi, m1), m2);
jaroslav@912
   127
Martin@594
   128
        return hi.next32(low);
jaroslav@912
   129
    };
Martin@582
   130
jaroslav@1868
   131
    function and64(x, y) {
jaroslav@1868
   132
        var low = x & y;
jaroslav@912
   133
        low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@1868
   134
        if (x.hi && y.hi) {
jaroslav@1868
   135
            var hi = x.hi & y.hi;
jaroslav@912
   136
            return hi.next32(low);
jaroslav@912
   137
        }
jaroslav@912
   138
        ;
Martin@615
   139
        return low;
jaroslav@912
   140
    };
Martin@615
   141
jaroslav@1868
   142
    function or64(x, y) {
jaroslav@1868
   143
        var low = x | y;
jaroslav@912
   144
        low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@1868
   145
        if (x.hi || y.hi) {
jaroslav@1868
   146
            var hi = x.hi | y.hi;
jaroslav@912
   147
            return hi.next32(low);
jaroslav@912
   148
        }
Martin@629
   149
        return low;
jaroslav@912
   150
    };
Martin@629
   151
jaroslav@1868
   152
    function xor64(x, y) {
jaroslav@1868
   153
        var low = x ^ y;
jaroslav@912
   154
        low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@1868
   155
        if (x.hi || y.hi) {
jaroslav@1868
   156
            var hi = x.hi ^ y.hi;
jaroslav@912
   157
            return hi.next32(low);
jaroslav@912
   158
        }
jaroslav@912
   159
        ;
jaroslav@912
   160
        return low;
jaroslav@912
   161
    };
Martin@630
   162
jaroslav@1869
   163
    function shl64(thiz, x) {
Martin@1352
   164
        x &= 0x3f;
jaroslav@1872
   165
        if (x === 0) return thiz;
jaroslav@912
   166
        if (x >= 32) {
jaroslav@1869
   167
            var hi = thiz << (x - 32);
jaroslav@912
   168
            return hi.next32(0);
jaroslav@912
   169
        } else {
jaroslav@1872
   170
            var hi = high32(thiz) << x;
jaroslav@1869
   171
            var low_reminder = thiz >> (32 - x);
jaroslav@912
   172
            hi |= low_reminder;
jaroslav@1869
   173
            var low = thiz << x;
jaroslav@912
   174
            low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@912
   175
            return hi.next32(low);
jaroslav@912
   176
        }
jaroslav@912
   177
    };
lubomir@676
   178
jaroslav@1869
   179
    function shr64(thiz, x) {
Martin@1352
   180
        x &= 0x3f;
jaroslav@1872
   181
        if (x === 0) return thiz;
jaroslav@912
   182
        if (x >= 32) {
jaroslav@1872
   183
            var low = high32(thiz) >> (x - 32);
jaroslav@912
   184
            low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@912
   185
            return low;
jaroslav@912
   186
        } else {
jaroslav@1869
   187
            var low = thiz >>> x;
jaroslav@1872
   188
            var hi_reminder = high32(thiz) << (32 - x);
jaroslav@912
   189
            low |= hi_reminder;
jaroslav@912
   190
            low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@1872
   191
            var hi = high32(thiz) >> x;
jaroslav@912
   192
            return hi.next32(low);
jaroslav@912
   193
        }
jaroslav@912
   194
    };
jaroslav@912
   195
jaroslav@1869
   196
    function ushr64(thiz, x) {
Martin@1352
   197
        x &= 0x3f;
jaroslav@1872
   198
        if (x === 0) return thiz;
jaroslav@912
   199
        if (x >= 32) {
jaroslav@1872
   200
            var low = high32(thiz) >>> (x - 32);
jaroslav@912
   201
            low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@912
   202
            return low;
jaroslav@912
   203
        } else {
jaroslav@1869
   204
            var low = thiz >>> x;
jaroslav@1872
   205
            var hi_reminder = high32(thiz) << (32 - x);
jaroslav@912
   206
            low |= hi_reminder;
jaroslav@912
   207
            low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@1872
   208
            var hi = high32(thiz) >>> x;
jaroslav@912
   209
            return hi.next32(low);
jaroslav@912
   210
        }
jaroslav@912
   211
    };
jaroslav@1800
   212
jaroslav@1871
   213
    function compare64(x, y) {
jaroslav@1872
   214
        if (high32(x) === high32(y)) {
jaroslav@1871
   215
            return (x < y) ? -1 : ((x > y) ? 1 : 0);
jaroslav@912
   216
        }
jaroslav@1872
   217
        return (high32(x) < high32(y)) ? -1 : 1;
jaroslav@912
   218
    };
jaroslav@912
   219
jaroslav@1870
   220
    function neg64(x) {
jaroslav@1872
   221
        var hi = high32(x);
jaroslav@1870
   222
        var low = x;
jaroslav@912
   223
        if ((hi === 0) && (low < 0)) {
jaroslav@912
   224
            return -low;
jaroslav@912
   225
        }
jaroslav@912
   226
        hi = ~hi;
jaroslav@912
   227
        low = ~low;
jaroslav@912
   228
        low += (low < 0) ? (__m32 + 1) : 0;
jaroslav@912
   229
        var ret = hi.next32(low);
jaroslav@1867
   230
        return add64(ret, 1);
jaroslav@912
   231
    };
jaroslav@912
   232
    
lubomir@737
   233
    function __handleDivByZero() {
lubomir@737
   234
        var exception = new vm.java_lang_ArithmeticException;
lubomir@737
   235
        vm.java_lang_ArithmeticException(false).constructor
lubomir@737
   236
          .cons__VLjava_lang_String_2.call(exception, "/ by zero");
lubomir@737
   237
lubomir@737
   238
        throw exception;
lubomir@737
   239
    }
lubomir@737
   240
lubomir@676
   241
    function __Int64(hi32, lo32) {
lubomir@676
   242
        this.hi32 = hi32 | 0;
lubomir@676
   243
        this.lo32 = lo32 | 0;
lubomir@676
   244
lubomir@676
   245
        this.get32 = function(bitIndex) {
lubomir@676
   246
            var v0;
lubomir@676
   247
            var v1;
lubomir@676
   248
            bitIndex += 32;
lubomir@676
   249
            var selector = bitIndex >>> 5;
lubomir@676
   250
            switch (selector) {
lubomir@676
   251
                case 0:
lubomir@676
   252
                    v0 = 0;
lubomir@676
   253
                    v1 = this.lo32;
lubomir@676
   254
                    break;
lubomir@676
   255
                case 1:
lubomir@676
   256
                    v0 = this.lo32;
lubomir@676
   257
                    v1 = this.hi32;
lubomir@676
   258
                    break;
lubomir@676
   259
                case 2:
lubomir@676
   260
                    v0 = this.hi32;
lubomir@676
   261
                    v1 = 0;
lubomir@676
   262
                    break
lubomir@676
   263
                default:
lubomir@676
   264
                    return 0;
lubomir@676
   265
            }
lubomir@676
   266
lubomir@676
   267
            var shift = bitIndex & 31;
lubomir@676
   268
            if (shift === 0) {
lubomir@676
   269
                return v0;
lubomir@676
   270
            }
lubomir@676
   271
lubomir@676
   272
            return (v1 << (32 - shift)) | (v0 >>> shift);
lubomir@676
   273
        }
lubomir@676
   274
lubomir@676
   275
        this.get16 = function(bitIndex) {
lubomir@676
   276
            return this.get32(bitIndex) & 0xffff;
lubomir@676
   277
        }
lubomir@676
   278
lubomir@676
   279
        this.set16 = function(bitIndex, value) {
lubomir@676
   280
            bitIndex += 32;
lubomir@676
   281
            var shift = bitIndex & 15;
lubomir@676
   282
            var svalue = (value & 0xffff) << shift; 
lubomir@676
   283
            var smask = 0xffff << shift;
lubomir@676
   284
            var selector = bitIndex >>> 4;
lubomir@676
   285
            switch (selector) {
lubomir@676
   286
                case 0:
lubomir@676
   287
                    break;
lubomir@676
   288
                case 1:
lubomir@676
   289
                    this.lo32 = (this.lo32 & ~(smask >>> 16))
lubomir@676
   290
                                    | (svalue >>> 16);
lubomir@676
   291
                    break;
lubomir@676
   292
                case 2:
lubomir@676
   293
                    this.lo32 = (this.lo32 & ~smask) | svalue;
lubomir@676
   294
                    break;
lubomir@676
   295
                case 3:
lubomir@676
   296
                    this.lo32 = (this.lo32 & ~(smask << 16))
lubomir@676
   297
                                    | (svalue << 16);
lubomir@676
   298
                    this.hi32 = (this.hi32 & ~(smask >>> 16))
lubomir@676
   299
                                    | (svalue >>> 16);
lubomir@676
   300
                    break;
lubomir@676
   301
                case 4:
lubomir@676
   302
                    this.hi32 = (this.hi32 & ~smask) | svalue;
lubomir@676
   303
                    break;
lubomir@676
   304
                case 5:
lubomir@676
   305
                    this.hi32 = (this.hi32 & ~(smask << 16))
lubomir@676
   306
                                    | (svalue << 16);
lubomir@676
   307
                    break;
lubomir@676
   308
            }
lubomir@676
   309
        }
lubomir@676
   310
lubomir@676
   311
        this.getDigit = function(index, shift) {
lubomir@676
   312
            return this.get16((index << 4) - shift);
lubomir@676
   313
        }
lubomir@676
   314
lubomir@676
   315
        this.getTwoDigits = function(index, shift) {
lubomir@676
   316
            return this.get32(((index - 1) << 4) - shift);
lubomir@676
   317
        }
lubomir@676
   318
lubomir@676
   319
        this.setDigit = function(index, shift, value) {
lubomir@676
   320
            this.set16((index << 4) - shift, value);
lubomir@676
   321
        }
lubomir@676
   322
lubomir@676
   323
        this.countSignificantDigits = function() {
lubomir@676
   324
            var sd;
lubomir@676
   325
            var remaining;
lubomir@676
   326
lubomir@676
   327
            if (this.hi32 === 0) {
lubomir@676
   328
                if (this.lo32 === 0) {
lubomir@676
   329
                    return 0;
lubomir@676
   330
                }
lubomir@676
   331
lubomir@676
   332
                sd = 2;
lubomir@676
   333
                remaining = this.lo32;
lubomir@676
   334
            } else {
lubomir@676
   335
                sd = 4;
lubomir@676
   336
                remaining = this.hi32;
lubomir@676
   337
            }
lubomir@676
   338
lubomir@676
   339
            if (remaining < 0) {
lubomir@676
   340
                return sd;
lubomir@676
   341
            }
lubomir@676
   342
lubomir@676
   343
            return (remaining < 65536) ? sd - 1 : sd;
lubomir@676
   344
        }
lubomir@676
   345
        
lubomir@676
   346
        this.toNumber = function() {
lubomir@676
   347
            var lo32 = this.lo32;
lubomir@676
   348
            if (lo32 < 0) {
lubomir@676
   349
                lo32 += 0x100000000;
lubomir@676
   350
            }
lubomir@676
   351
lubomir@676
   352
            return this.hi32.next32(lo32);
lubomir@676
   353
        }
lubomir@676
   354
    }
lubomir@676
   355
lubomir@676
   356
    function __countLeadingZeroes16(number) {
lubomir@676
   357
        var nlz = 0;
lubomir@676
   358
lubomir@676
   359
        if (number < 256) {
lubomir@676
   360
            nlz += 8;
lubomir@676
   361
            number <<= 8;
lubomir@676
   362
        }
lubomir@676
   363
lubomir@676
   364
        if (number < 4096) {
lubomir@676
   365
            nlz += 4;
lubomir@676
   366
            number <<= 4;
lubomir@676
   367
        }
lubomir@676
   368
lubomir@676
   369
        if (number < 16384) {
lubomir@676
   370
            nlz += 2;
lubomir@676
   371
            number <<= 2;
lubomir@676
   372
        }
lubomir@676
   373
lubomir@676
   374
        return (number < 32768) ? nlz + 1 : nlz;
lubomir@676
   375
    }
lubomir@676
   376
    
lubomir@676
   377
    // q = u / v; r = u - q * v;
lubomir@676
   378
    // v != 0
lubomir@676
   379
    function __div64(q, r, u, v) {
lubomir@676
   380
        var m = u.countSignificantDigits();
lubomir@676
   381
        var n = v.countSignificantDigits();
lubomir@676
   382
lubomir@676
   383
        q.hi32 = q.lo32 = 0;
lubomir@676
   384
lubomir@676
   385
        if (n === 1) {
lubomir@676
   386
            // v has single digit
lubomir@676
   387
            var vd = v.getDigit(0, 0);
lubomir@676
   388
            var carry = 0;
lubomir@676
   389
            for (var i = m - 1; i >= 0; --i) {
lubomir@676
   390
                var ui = (carry << 16) | u.getDigit(i, 0);
lubomir@676
   391
                if (ui < 0) {
lubomir@676
   392
                    ui += 0x100000000;
lubomir@676
   393
                }
lubomir@676
   394
                var qi = (ui / vd) | 0;
lubomir@676
   395
                q.setDigit(i, 0, qi);
lubomir@676
   396
                carry = ui - qi * vd;
lubomir@676
   397
            }
lubomir@676
   398
lubomir@676
   399
            r.hi32 = 0;
lubomir@676
   400
            r.lo32 = carry;
lubomir@676
   401
            return;
lubomir@676
   402
        }
lubomir@676
   403
lubomir@676
   404
        r.hi32 = u.hi32;  
lubomir@676
   405
        r.lo32 = u.lo32;
lubomir@676
   406
lubomir@676
   407
        if (m < n) {
lubomir@676
   408
            return;
lubomir@676
   409
        }
lubomir@676
   410
lubomir@676
   411
        // Normalize
lubomir@676
   412
        var nrm = __countLeadingZeroes16(v.getDigit(n - 1, 0));
lubomir@676
   413
lubomir@676
   414
        var vd1 = v.getDigit(n - 1, nrm);                
lubomir@676
   415
        var vd0 = v.getDigit(n - 2, nrm);
lubomir@676
   416
        for (var j = m - n; j >= 0; --j) {
lubomir@676
   417
            // Calculate qj estimate
lubomir@676
   418
            var ud21 = r.getTwoDigits(j + n, nrm);
lubomir@676
   419
            var ud2 = ud21 >>> 16;
lubomir@676
   420
            if (ud21 < 0) {
lubomir@676
   421
                ud21 += 0x100000000;
lubomir@676
   422
            }
lubomir@676
   423
lubomir@676
   424
            var qest = (ud2 === vd1) ? 0xFFFF : ((ud21 / vd1) | 0);
lubomir@676
   425
            var rest = ud21 - qest * vd1;
lubomir@676
   426
lubomir@676
   427
            // 0 <= (qest - qj) <= 2
lubomir@676
   428
lubomir@676
   429
            // Refine qj estimate
lubomir@676
   430
            var ud0 = r.getDigit(j + n - 2, nrm);
lubomir@676
   431
            while ((qest * vd0) > ((rest * 0x10000) + ud0)) {
lubomir@676
   432
                --qest;
lubomir@676
   433
                rest += vd1;
lubomir@676
   434
            }
lubomir@676
   435
lubomir@676
   436
            // 0 <= (qest - qj) <= 1
lubomir@676
   437
            
lubomir@676
   438
            // Multiply and subtract
lubomir@676
   439
            var carry = 0;
lubomir@676
   440
            for (var i = 0; i < n; ++i) {
lubomir@676
   441
                var vi = qest * v.getDigit(i, nrm);
lubomir@676
   442
                var ui = r.getDigit(i + j, nrm) - carry - (vi & 0xffff);
lubomir@676
   443
                r.setDigit(i + j, nrm, ui);
lubomir@676
   444
                carry = (vi >>> 16) - (ui >> 16);
lubomir@676
   445
            }
lubomir@676
   446
            var uj = ud2 - carry;
lubomir@676
   447
lubomir@676
   448
            if (uj < 0) {
lubomir@676
   449
                // qest - qj = 1
lubomir@676
   450
lubomir@676
   451
                // Add back
lubomir@676
   452
                --qest;
lubomir@676
   453
                var carry = 0;
lubomir@676
   454
                for (var i = 0; i < n; ++i) {
lubomir@676
   455
                    var ui = r.getDigit(i + j, nrm) + v.getDigit(i, nrm)
lubomir@676
   456
                                 + carry;
lubomir@676
   457
                    r.setDigit(i + j, nrm, ui);
lubomir@676
   458
                    carry = ui >> 16;
lubomir@676
   459
                }
lubomir@676
   460
                uj += carry;
lubomir@676
   461
            }
lubomir@676
   462
lubomir@676
   463
            q.setDigit(j, 0, qest);
lubomir@676
   464
            r.setDigit(j + n, nrm, uj);
lubomir@676
   465
        }
lubomir@676
   466
    }
lubomir@737
   467
jaroslav@1867
   468
    function div64(x, y) {
lubomir@676
   469
        var negateResult = false;
lubomir@676
   470
        var u, v;
lubomir@737
   471
jaroslav@1872
   472
        if ((high32(x) & 0x80000000) !== 0) {
jaroslav@1870
   473
            u = neg64(x);
lubomir@676
   474
            negateResult = !negateResult;
lubomir@676
   475
        } else {
jaroslav@1867
   476
            u = x;
lubomir@676
   477
        }
lubomir@676
   478
jaroslav@1872
   479
        if ((high32(y) & 0x80000000) !== 0) {
jaroslav@1870
   480
            v = neg64(y);
lubomir@676
   481
            negateResult = !negateResult;
lubomir@676
   482
        } else {
jaroslav@1867
   483
            v = y;
lubomir@676
   484
        }
lubomir@676
   485
jaroslav@1872
   486
        if ((v === 0) && (high32(v) === 0)) {
lubomir@737
   487
            __handleDivByZero();
lubomir@676
   488
        }
lubomir@676
   489
jaroslav@1872
   490
        if (high32(u) === 0) {
jaroslav@1872
   491
            if (high32(v) === 0) {
lubomir@676
   492
                var result = (u / v) | 0;
jaroslav@1870
   493
                return negateResult ? neg64(result) : result;
lubomir@676
   494
            }
lubomir@676
   495
lubomir@676
   496
            return 0;
lubomir@676
   497
        }
lubomir@676
   498
jaroslav@1872
   499
        var u64 = new __Int64(high32(u), u);
jaroslav@1872
   500
        var v64 = new __Int64(high32(v), v);
lubomir@676
   501
        var q64 = new __Int64(0, 0);
lubomir@676
   502
        var r64 = new __Int64(0, 0);
lubomir@676
   503
lubomir@676
   504
        __div64(q64, r64, u64, v64);
lubomir@676
   505
lubomir@676
   506
        var result = q64.toNumber();
jaroslav@1870
   507
        return negateResult ? neg64(result) : result;
lubomir@676
   508
    }
lubomir@676
   509
jaroslav@1868
   510
    function mod64(x, y) {
lubomir@676
   511
        var negateResult = false;
lubomir@676
   512
        var u, v;
lubomir@676
   513
        
jaroslav@1872
   514
        if ((high32(x) & 0x80000000) !== 0) {
jaroslav@1870
   515
            u = neg64(x);
lubomir@676
   516
            negateResult = !negateResult;
lubomir@676
   517
        } else {
jaroslav@1868
   518
            u = x;
lubomir@676
   519
        }
lubomir@676
   520
jaroslav@1872
   521
        if ((high32(y) & 0x80000000) !== 0) {
jaroslav@1870
   522
            v = neg64(y);
lubomir@676
   523
        } else {
jaroslav@1868
   524
            v = y;
lubomir@676
   525
        }
lubomir@676
   526
jaroslav@1872
   527
        if ((v === 0) && (high32(v) === 0)) {
lubomir@737
   528
            __handleDivByZero();
lubomir@676
   529
        }
lubomir@676
   530
jaroslav@1872
   531
        if (high32(u) === 0) {
jaroslav@1872
   532
            var result = (high32(v) === 0) ? (u % v) : u;
jaroslav@1870
   533
            return negateResult ? neg64(result) : result;
lubomir@676
   534
        }
lubomir@676
   535
jaroslav@1872
   536
        var u64 = new __Int64(high32(u), u);
jaroslav@1872
   537
        var v64 = new __Int64(high32(v), v);
lubomir@676
   538
        var q64 = new __Int64(0, 0);
lubomir@676
   539
        var r64 = new __Int64(0, 0);
lubomir@676
   540
lubomir@676
   541
        __div64(q64, r64, u64, v64);
lubomir@676
   542
lubomir@676
   543
        var result = r64.toNumber();
jaroslav@1870
   544
        return negateResult ? neg64(result) : result;
lubomir@676
   545
    }
jaroslav@1866
   546
jaroslav@1866
   547
    var b = numberPrototype['__bit64'] = {};
jaroslav@1867
   548
    b.add64 = add64;
jaroslav@1867
   549
    b.sub64 = sub64;
jaroslav@1867
   550
    b.mul64 = mul64;
jaroslav@1867
   551
    b.div64 = div64;
jaroslav@1868
   552
    b.mod64 = mod64;
jaroslav@1868
   553
    b.and64 = and64;
jaroslav@1868
   554
    b.or64 = or64;
jaroslav@1868
   555
    b.xor64 = xor64;
jaroslav@1870
   556
    b.neg64 = neg64;
jaroslav@1869
   557
    b.shl64 = shl64;
jaroslav@1869
   558
    b.shr64 = shr64;
jaroslav@1869
   559
    b.ushr64 = ushr64;
jaroslav@1871
   560
    b.compare64 = compare64;
lubomir@678
   561
})(Number.prototype);
jaroslav@832
   562
jaroslav@832
   563
vm.java_lang_Number(false);