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LargeIntegers.js
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/* Smalltalk from Squeak4.5 with VMMaker 4.13.6 translated as JS source on 3 November 2014 1:52:21 pm */
/* Automatically generated by
JSSmartSyntaxPluginCodeGenerator VMMakerJS-bf.15 uuid: fd4e10f2-3773-4e80-8bb5-c4b471a014e5
from
LargeIntegersPlugin VMMaker-bf.353 uuid: 8ae25e7e-8d2c-451e-8277-598b30e9c002
*/
module("users.bert.SqueakJS.plugins.LargeIntegers").requires("users.bert.SqueakJS.vm").toRun(function() {
"use strict";
var VM_PROXY_MAJOR = 1;
var VM_PROXY_MINOR = 11;
/*** Functions ***/
function CLASSOF(obj) { return typeof obj === "number" ? interpreterProxy.classSmallInteger() : obj.sqClass }
function SIZEOF(obj) { return obj.pointers ? obj.pointers.length : obj.words ? obj.words.length : obj.bytes ? obj.bytes.length : 0 }
function BYTESIZEOF(obj) { return obj.bytes ? obj.bytes.length : obj.words ? obj.words.length * 4 : 0 }
function DIV(a, b) { return Math.floor(a / b) | 0; } // integer division
function MOD(a, b) { return a - DIV(a, b) * b | 0; } // signed modulus
function SHL(a, b) { return b > 31 ? 0 : a << b; } // fix JS shift
function SHR(a, b) { return b > 31 ? 0 : a >>> b; } // fix JS shift
function SHIFT(a, b) { return b < 0 ? (b < -31 ? 0 : a >>> (0-b) ) : (b > 31 ? 0 : a << b); }
/*** Variables ***/
var andOpIndex = 0;
var interpreterProxy = null;
var moduleName = "LargeIntegers v1.5 (e)";
var orOpIndex = 1;
var xorOpIndex = 2;
/* Argument has to be aBytesOop! */
/* Tests for any magnitude bits in the interval from start to stopArg. */
function anyBitOfBytesfromto(aBytesOop, start, stopArg) {
var lastByteIx;
var digit;
var magnitude;
var leftShift;
var rightShift;
var firstByteIx;
var stop;
var mask;
var ix;
// missing DebugCode;
if ((start < 1) || (stopArg < 1)) {
return interpreterProxy.primitiveFail();
}
magnitude = aBytesOop;
stop = Math.min(stopArg, highBitOfBytes(magnitude));
if (start > stop) {
return false;
}
firstByteIx = ((start - 1) >> 3) + 1;
lastByteIx = ((stop - 1) >> 3) + 1;
rightShift = MOD((start - 1), 8);
leftShift = 7 - (MOD((stop - 1), 8));
if (firstByteIx === lastByteIx) {
mask = (SHL(255, rightShift)) & (SHR(255, leftShift));
digit = digitOfBytesat(magnitude, firstByteIx);
return (digit & mask) !== 0;
}
if ((SHR(digitOfBytesat(magnitude, firstByteIx), rightShift)) !== 0) {
return true;
}
for (ix = (firstByteIx + 1); ix <= (lastByteIx - 1); ix++) {
if (digitOfBytesat(magnitude, ix) !== 0) {
return true;
}
}
if (((SHL(digitOfBytesat(magnitude, lastByteIx), leftShift)) & 255) !== 0) {
return true;
}
return false;
}
/* Precondition: bytesOop is not anInteger and a bytes object. */
/* Function #byteSizeOf: is used by the interpreter, be careful with name
clashes... */
function byteSizeOfBytes(bytesOop) {
return SIZEOF(bytesOop);
}
/* Attention: this method invalidates all oop's! Only newBytes is valid at return. */
/* Does not normalize. */
function bytesgrowTo(aBytesObject, newLen) {
var oldLen;
var copyLen;
var newBytes;
newBytes = interpreterProxy.instantiateClassindexableSize(CLASSOF(aBytesObject), newLen);
;
oldLen = BYTESIZEOF(aBytesObject);
if (oldLen < newLen) {
copyLen = oldLen;
} else {
copyLen = newLen;
}
cDigitCopyFromtolen(aBytesObject.bytes, newBytes.bytes, copyLen);
return newBytes;
}
/* Attention: this method invalidates all oop's! Only newBytes is valid at return. */
function bytesOrIntgrowTo(oop, len) {
var sq_class;
var val;
var newBytes;
if (typeof oop === "number") {
val = oop;
if (val < 0) {
sq_class = interpreterProxy.classLargeNegativeInteger();
} else {
sq_class = interpreterProxy.classLargePositiveInteger();
}
newBytes = interpreterProxy.instantiateClassindexableSize(sq_class, len);
cCopyIntValtoBytes(val, newBytes);
} else {
newBytes = bytesgrowTo(oop, len);
}
return newBytes;
}
function cCopyIntValtoBytes(val, bytes) {
var pByte;
var ix;
var ixLimiT;
pByte = bytes.bytes;
for (ix = 1, ixLimiT = cDigitLengthOfCSI(val); ix <= ixLimiT; ix++) {
pByte[ix - 1] = cDigitOfCSIat(val, ix);
}
}
/* pByteRes len = longLen; returns over.. */
function cDigitAddlenwithleninto(pByteShort, shortLen, pByteLong, longLen, pByteRes) {
var i;
var limit;
var accum;
accum = 0;
limit = shortLen - 1;
for (i = 0; i <= limit; i++) {
accum = ((accum >>> 8) + pByteShort[i]) + pByteLong[i];
pByteRes[i] = (accum & 255);
}
limit = longLen - 1;
for (i = shortLen; i <= limit; i++) {
accum = (accum >>> 8) + pByteLong[i];
pByteRes[i] = (accum & 255);
}
return accum >>> 8;
}
/* Precondition: pFirst len = pSecond len. */
function cDigitComparewithlen(pFirst, pSecond, len) {
var firstDigit;
var secondDigit;
var ix;
ix = len - 1;
while (ix >= 0) {
if (((secondDigit = pSecond[ix])) !== ((firstDigit = pFirst[ix]))) {
if (secondDigit < firstDigit) {
return 1;
} else {
return -1;
}
}
--ix;
}
return 0;
}
function cDigitCopyFromtolen(pFrom, pTo, len) {
var limit;
var i;
;
limit = len - 1;
for (i = 0; i <= limit; i++) {
pTo[i] = pFrom[i];
}
return 0;
}
function cDigitDivlenremlenquolen(pDiv, divLen, pRem, remLen, pQuo, quoLen) {
var b;
var q;
var a;
var dnh;
var lo;
var hi;
var r3;
var mul;
var cond;
var l;
var k;
var j;
var i;
var dl;
var ql;
var r1r2;
var dh;
var t;
/* Last actual byte of data (ST ix) */
dl = divLen - 1;
ql = quoLen;
dh = pDiv[dl - 1];
if (dl === 1) {
dnh = 0;
} else {
dnh = pDiv[dl - 2];
}
for (k = 1; k <= ql; k++) {
/* maintain quo*arg+rem=self */
/* Estimate rem/div by dividing the leading two digits of rem by dh. */
/* The estimate is q = qhi*16r100+qlo, where qhi and qlo are unsigned char. */
/* r1 := rem digitAt: j. */
j = (remLen + 1) - k;
if (pRem[j - 1] === dh) {
q = 255;
} else {
/* Compute q = (r1,r2)//dh, t = (r1,r2)\\dh. */
/* r2 := (rem digitAt: j - 2). */
r1r2 = pRem[j - 1];
r1r2 = (r1r2 << 8) + pRem[j - 2];
t = MOD(r1r2, dh);
/* Next compute (hi,lo) := q*dnh */
q = DIV(r1r2, dh);
mul = q * dnh;
hi = mul >>> 8;
/* Correct overestimate of q.
Max of 2 iterations through loop -- see Knuth vol. 2 */
lo = mul & 255;
if (j < 3) {
r3 = 0;
} else {
r3 = pRem[j - 3];
}
while (true) {
if ((t < hi) || ((t === hi) && (r3 < lo))) {
/* i.e. (t,r3) < (hi,lo) */
--q;
if (lo < dnh) {
--hi;
lo = (lo + 256) - dnh;
} else {
lo -= dnh;
}
cond = hi >= dh;
} else {
cond = false;
}
if (!(cond)) break;
hi -= dh;
}
}
l = j - dl;
a = 0;
for (i = 1; i <= divLen; i++) {
hi = pDiv[i - 1] * (q >>> 8);
lo = pDiv[i - 1] * (q & 255);
b = (pRem[l - 1] - a) - (lo & 255);
pRem[l - 1] = (b & 255);
/* This is a possible replacement to simulate arithmetic shift (preserving sign of b) */
/* b := b >> 8 bitOr: (0 - (b >> ((interpreterProxy sizeof: b)*8 */
/* CHAR_BIT */
/* -1)) << 8). */
b = b >> 8;
a = (hi + (lo >>> 8)) - b;
++l;
}
if (a > 0) {
/* Add div back into rem, decrease q by 1 */
--q;
l = j - dl;
a = 0;
for (i = 1; i <= divLen; i++) {
a = ((a >>> 8) + pRem[l - 1]) + pDiv[i - 1];
pRem[l - 1] = (a & 255);
++l;
}
}
pQuo[quoLen - k] = q;
}
return 0;
}
/* Answer the index (in bits) of the high order bit of the receiver, or zero if the
receiver is zero. This method is allowed (and needed) for
LargeNegativeIntegers as well, since Squeak's LargeIntegers are
sign/magnitude. */
function cDigitHighBitlen(pByte, len) {
var lastDigit;
var realLength;
realLength = len;
while (((lastDigit = pByte[realLength - 1])) === 0) {
if (((--realLength)) === 0) {
return 0;
}
}
return cHighBit(lastDigit) + (8 * (realLength - 1));
}
/* Answer the number of indexable fields of a CSmallInteger. This value is
the same as the largest legal subscript. */
function cDigitLengthOfCSI(csi) {
if ((csi < 256) && (csi > -256)) {
return 1;
}
if ((csi < 65536) && (csi > -65536)) {
return 2;
}
if ((csi < 16777216) && (csi > -16777216)) {
return 3;
}
return 4;
}
/* C indexed! */
function cDigitLshiftfromlentolen(shiftCount, pFrom, lenFrom, pTo, lenTo) {
var digitShift;
var carry;
var digit;
var i;
var bitShift;
var rshift;
var limit;
digitShift = shiftCount >> 3;
bitShift = MOD(shiftCount, 8);
limit = digitShift - 1;
for (i = 0; i <= limit; i++) {
pTo[i] = 0;
}
if (bitShift === 0) {
/* Fast version for digit-aligned shifts */
/* C indexed! */
return cDigitReplacefromtowithstartingAt(pTo, digitShift, lenTo - 1, pFrom, 0);
}
rshift = 8 - bitShift;
carry = 0;
limit = lenFrom - 1;
for (i = 0; i <= limit; i++) {
digit = pFrom[i];
pTo[i + digitShift] = ((carry | (SHL(digit, bitShift))) & 255);
carry = SHR(digit, rshift);
}
if (carry !== 0) {
pTo[lenTo - 1] = carry;
}
return 0;
}
function cDigitMontgomerylentimeslenmodulolenmInvModBinto(pBytesFirst, firstLen, pBytesSecond, secondLen, pBytesThird, thirdLen, mInv, pBytesRes) {
var k;
var i;
var lastByte;
var limit3;
var limit2;
var limit1;
var u;
var accum;
limit1 = firstLen - 1;
limit2 = secondLen - 1;
limit3 = thirdLen - 1;
lastByte = 0;
for (i = 0; i <= limit1; i++) {
accum = pBytesRes[0] + (pBytesFirst[i] * pBytesSecond[0]);
u = (accum * mInv) & 255;
accum += u * pBytesThird[0];
for (k = 1; k <= limit2; k++) {
accum = (((accum >>> 8) + pBytesRes[k]) + (pBytesFirst[i] * pBytesSecond[k])) + (u * pBytesThird[k]);
pBytesRes[k - 1] = (accum & 255);
}
for (k = secondLen; k <= limit3; k++) {
accum = ((accum >>> 8) + pBytesRes[k]) + (u * pBytesThird[k]);
pBytesRes[k - 1] = (accum & 255);
}
accum = (accum >>> 8) + lastByte;
pBytesRes[limit3] = (accum & 255);
lastByte = accum >>> 8;
}
for (i = firstLen; i <= limit3; i++) {
accum = pBytesRes[0];
u = (accum * mInv) & 255;
accum += u * pBytesThird[0];
for (k = 1; k <= limit3; k++) {
accum = ((accum >>> 8) + pBytesRes[k]) + (u * pBytesThird[k]);
pBytesRes[k - 1] = (accum & 255);
}
accum = (accum >>> 8) + lastByte;
pBytesRes[limit3] = (accum & 255);
lastByte = accum >>> 8;
}
if (!((lastByte === 0) && (cDigitComparewithlen(pBytesThird, pBytesRes, thirdLen) === 1))) {
/* self cDigitSub: pBytesThird len: thirdLen with: pBytesRes len: thirdLen into: pBytesRes */
accum = 0;
for (i = 0; i <= limit3; i++) {
accum = (accum + pBytesRes[i]) - pBytesThird[i];
pBytesRes[i] = (accum & 255);
accum = accum >> 8;
}
}
}
function cDigitMultiplylenwithleninto(pByteShort, shortLen, pByteLong, longLen, pByteRes) {
var ab;
var j;
var digit;
var carry;
var i;
var limitLong;
var k;
var limitShort;
if ((shortLen === 1) && (pByteShort[0] === 0)) {
return 0;
}
if ((longLen === 1) && (pByteLong[0] === 0)) {
return 0;
}
limitShort = shortLen - 1;
limitLong = longLen - 1;
for (i = 0; i <= limitShort; i++) {
if (((digit = pByteShort[i])) !== 0) {
k = i;
/* Loop invariant: 0<=carry<=0377, k=i+j-1 (ST) */
/* -> Loop invariant: 0<=carry<=0377, k=i+j (C) (?) */
carry = 0;
for (j = 0; j <= limitLong; j++) {
ab = pByteLong[j];
ab = ((ab * digit) + carry) + pByteRes[k];
carry = ab >>> 8;
pByteRes[k] = (ab & 255);
++k;
}
pByteRes[k] = carry;
}
}
return 0;
}
/* Answer the value of an indexable field in the receiver.
LargePositiveInteger uses bytes of base two number, and each is a
'digit' base 256. */
/* ST indexed! */
function cDigitOfCSIat(csi, ix) {
if (ix < 1) {
interpreterProxy.primitiveFail();
}
if (ix > 4) {
return 0;
}
if (csi < 0) {
;
return (SHR((0 - csi), ((ix - 1) * 8))) & 255;
} else {
return (SHR(csi, ((ix - 1) * 8))) & 255;
}
}
/* pByteRes len = longLen. */
function cDigitOpshortlenlongleninto(opIndex, pByteShort, shortLen, pByteLong, longLen, pByteRes) {
var i;
var limit;
limit = shortLen - 1;
if (opIndex === andOpIndex) {
for (i = 0; i <= limit; i++) {
pByteRes[i] = (pByteShort[i] & pByteLong[i]);
}
limit = longLen - 1;
for (i = shortLen; i <= limit; i++) {
pByteRes[i] = 0;
}
return 0;
}
if (opIndex === orOpIndex) {
for (i = 0; i <= limit; i++) {
pByteRes[i] = (pByteShort[i] | pByteLong[i]);
}
limit = longLen - 1;
for (i = shortLen; i <= limit; i++) {
pByteRes[i] = pByteLong[i];
}
return 0;
}
if (opIndex === xorOpIndex) {
for (i = 0; i <= limit; i++) {
pByteRes[i] = (pByteShort[i] ^ pByteLong[i]);
}
limit = longLen - 1;
for (i = shortLen; i <= limit; i++) {
pByteRes[i] = pByteLong[i];
}
return 0;
}
return interpreterProxy.primitiveFail();
}
/* C indexed! */
function cDigitReplacefromtowithstartingAt(pTo, start, stop, pFrom, repStart) {
return function() {
// inlining self cDigitCopyFrom: pFrom + repStart to: pTo + start len: stop - start + 1
var len = stop - start + 1;
for (var i = 0; i < len; i++) {
pTo[i + start] = pFrom[i + repStart];
}
return 0;
}();
;
}
function cDigitRshiftfromlentolen(shiftCount, pFrom, fromLen, pTo, toLen) {
var j;
var digitShift;
var carry;
var digit;
var bitShift;
var leftShift;
var limit;
var start;
digitShift = shiftCount >> 3;
bitShift = MOD(shiftCount, 8);
if (bitShift === 0) {
/* Fast version for byte-aligned shifts */
/* C indexed! */
return cDigitReplacefromtowithstartingAt(pTo, 0, toLen - 1, pFrom, digitShift);
}
leftShift = 8 - bitShift;
carry = SHR(pFrom[digitShift], bitShift);
start = digitShift + 1;
limit = fromLen - 1;
for (j = start; j <= limit; j++) {
digit = pFrom[j];
pTo[j - start] = ((carry | (SHL(digit, leftShift))) & 255);
carry = SHR(digit, bitShift);
}
if (carry !== 0) {
pTo[toLen - 1] = carry;
}
return 0;
}
function cDigitSublenwithleninto(pByteSmall, smallLen, pByteLarge, largeLen, pByteRes) {
var i;
var z;
/* Loop invariant is -1<=z<=0 */
z = 0;
for (i = 0; i <= (smallLen - 1); i++) {
z = (z + pByteLarge[i]) - pByteSmall[i];
pByteRes[i] = (z & 255);
z = z >> 8;
}
for (i = smallLen; i <= (largeLen - 1); i++) {
z += pByteLarge[i];
pByteRes[i] = (z & 255);
z = z >> 8;
}
}
/* Answer the index of the high order bit of the argument, or zero if the
argument is zero. */
/* For 64 bit uints there could be added a 32-shift. */
function cHighBit(uint) {
var shifted;
var bitNo;
shifted = uint;
bitNo = 0;
if (!(shifted < (1 << 16))) {
shifted = shifted >>> 16;
bitNo += 16;
}
if (!(shifted < (1 << 8))) {
shifted = shifted >>> 8;
bitNo += 8;
}
if (!(shifted < (1 << 4))) {
shifted = shifted >>> 4;
bitNo += 4;
}
if (!(shifted < (1 << 2))) {
shifted = shifted >>> 2;
bitNo += 2;
}
if (!(shifted < (1 << 1))) {
shifted = shifted >>> 1;
++bitNo;
}
return bitNo + shifted;
}
/* anOop has to be a SmallInteger! */
function createLargeFromSmallInteger(anOop) {
var size;
var res;
var pByte;
var ix;
var sq_class;
var val;
val = anOop;
if (val < 0) {
sq_class = interpreterProxy.classLargeNegativeInteger();
} else {
sq_class = interpreterProxy.classLargePositiveInteger();
}
size = cDigitLengthOfCSI(val);
res = interpreterProxy.instantiateClassindexableSize(sq_class, size);
pByte = res.bytes;
for (ix = 1; ix <= size; ix++) {
pByte[ix - 1] = cDigitOfCSIat(val, ix);
}
return res;
}
/* Attention: this method invalidates all oop's! Only newBytes is valid at return. */
/* Does not normalize. */
function digitLshift(aBytesOop, shiftCount) {
var newLen;
var oldLen;
var newBytes;
var highBit;
oldLen = BYTESIZEOF(aBytesOop);
if (((highBit = cDigitHighBitlen(aBytesOop.bytes, oldLen))) === 0) {
return 0;
}
newLen = ((highBit + shiftCount) + 7) >> 3;
newBytes = interpreterProxy.instantiateClassindexableSize(CLASSOF(aBytesOop), newLen);
;
cDigitLshiftfromlentolen(shiftCount, aBytesOop.bytes, oldLen, newBytes.bytes, newLen);
return newBytes;
}
/* Attention: this method invalidates all oop's! Only newBytes is valid at return. */
/* Shift right shiftCount bits, 0<=shiftCount.
Discard all digits beyond a, and all zeroes at or below a. */
/* Does not normalize. */
function digitRshiftlookfirst(aBytesOop, shiftCount, a) {
var newOop;
var oldDigitLen;
var newByteLen;
var newBitLen;
var oldBitLen;
oldBitLen = cDigitHighBitlen(aBytesOop.bytes, a);
oldDigitLen = (oldBitLen + 7) >> 3;
newBitLen = oldBitLen - shiftCount;
if (newBitLen <= 0) {
/* All bits lost */
return interpreterProxy.instantiateClassindexableSize(CLASSOF(aBytesOop), 0);
}
newByteLen = (newBitLen + 7) >> 3;
newOop = interpreterProxy.instantiateClassindexableSize(CLASSOF(aBytesOop), newByteLen);
;
cDigitRshiftfromlentolen(shiftCount, aBytesOop.bytes, oldDigitLen, newOop.bytes, newByteLen);
return newOop;
}
/* Does not need to normalize! */
function digitAddLargewith(firstInteger, secondInteger) {
var sum;
var shortLen;
var over;
var shortInt;
var resClass;
var newSum;
var longLen;
var firstLen;
var secondLen;
var longInt;
firstLen = BYTESIZEOF(firstInteger);
secondLen = BYTESIZEOF(secondInteger);
resClass = CLASSOF(firstInteger);
if (firstLen <= secondLen) {
shortInt = firstInteger;
shortLen = firstLen;
longInt = secondInteger;
longLen = secondLen;
} else {
shortInt = secondInteger;
shortLen = secondLen;
longInt = firstInteger;
longLen = firstLen;
}
sum = interpreterProxy.instantiateClassindexableSize(resClass, longLen);
;
over = cDigitAddlenwithleninto(shortInt.bytes, shortLen, longInt.bytes, longLen, sum.bytes);
if (over > 0) {
/* sum := sum growby: 1. */
newSum = interpreterProxy.instantiateClassindexableSize(resClass, longLen + 1);
;
cDigitCopyFromtolen(sum.bytes, newSum.bytes, longLen);
/* C index! */
sum = newSum;
sum.bytes[longLen] = over;
}
return sum;
}
/* Bit logic here is only implemented for positive integers or Zero;
if rec or arg is negative, it fails. */
function digitBitLogicwithopIndex(firstInteger, secondInteger, opIx) {
var shortLen;
var shortLarge;
var firstLarge;
var secondLarge;
var longLen;
var longLarge;
var firstLen;
var secondLen;
var result;
if (typeof firstInteger === "number") {
if (firstInteger < 0) {
return interpreterProxy.primitiveFail();
}
firstLarge = createLargeFromSmallInteger(firstInteger);
;
} else {
if (CLASSOF(firstInteger) === interpreterProxy.classLargeNegativeInteger()) {
return interpreterProxy.primitiveFail();
}
firstLarge = firstInteger;
}
if (typeof secondInteger === "number") {
if (secondInteger < 0) {
return interpreterProxy.primitiveFail();
}
secondLarge = createLargeFromSmallInteger(secondInteger);
;
} else {
if (CLASSOF(secondInteger) === interpreterProxy.classLargeNegativeInteger()) {
return interpreterProxy.primitiveFail();
}
secondLarge = secondInteger;
}
firstLen = BYTESIZEOF(firstLarge);
secondLen = BYTESIZEOF(secondLarge);
if (firstLen < secondLen) {
shortLen = firstLen;
shortLarge = firstLarge;
longLen = secondLen;
longLarge = secondLarge;
} else {
shortLen = secondLen;
shortLarge = secondLarge;
longLen = firstLen;
longLarge = firstLarge;
}
result = interpreterProxy.instantiateClassindexableSize(interpreterProxy.classLargePositiveInteger(), longLen);
;
cDigitOpshortlenlongleninto(opIx, shortLarge.bytes, shortLen, longLarge.bytes, longLen, result.bytes);
if (interpreterProxy.failed()) {
return 0;
}
return normalizePositive(result);
}
/* Compare the magnitude of firstInteger with that of secondInteger.
Return a code of 1, 0, -1 for firstInteger >, = , < secondInteger */
function digitCompareLargewith(firstInteger, secondInteger) {
var secondLen;
var firstLen;
firstLen = BYTESIZEOF(firstInteger);
secondLen = BYTESIZEOF(secondInteger);
if (secondLen !== firstLen) {
if (secondLen > firstLen) {
return -1;
} else {
return 1;
}
}
return cDigitComparewithlen(firstInteger.bytes, secondInteger.bytes, firstLen);
}
/* Does not normalize. */
/* Division by zero has to be checked in caller. */
function digitDivLargewithnegative(firstInteger, secondInteger, neg) {
var resultClass;
var result;
var rem;
var div;
var quo;
var d;
var l;
var secondLen;
var firstLen;
firstLen = BYTESIZEOF(firstInteger);
secondLen = BYTESIZEOF(secondInteger);
if (neg) {
resultClass = interpreterProxy.classLargeNegativeInteger();
} else {
resultClass = interpreterProxy.classLargePositiveInteger();
}
l = (firstLen - secondLen) + 1;
if (l <= 0) {
result = interpreterProxy.instantiateClassindexableSize(interpreterProxy.classArray(), 2);
;
interpreterProxy.stObjectatput(result,1,0);
interpreterProxy.stObjectatput(result,2,firstInteger);
return result;
}
d = 8 - cHighBit(unsafeByteOfat(secondInteger, secondLen));
div = digitLshift(secondInteger, d);
div = bytesOrIntgrowTo(div, digitLength(div) + 1);
;
rem = digitLshift(firstInteger, d);
if (digitLength(rem) === firstLen) {
rem = bytesOrIntgrowTo(rem, firstLen + 1);
}
;
quo = interpreterProxy.instantiateClassindexableSize(resultClass, l);
;
cDigitDivlenremlenquolen(div.bytes, digitLength(div), rem.bytes, digitLength(rem), quo.bytes, digitLength(quo));
rem = digitRshiftlookfirst(rem, d, digitLength(div) - 1);
;
result = interpreterProxy.instantiateClassindexableSize(interpreterProxy.classArray(), 2);
;
interpreterProxy.stObjectatput(result,1,quo);
interpreterProxy.stObjectatput(result,2,rem);
return result;
}
function digitLength(oop) {
if (typeof oop === "number") {
return cDigitLengthOfCSI(oop);
} else {
return BYTESIZEOF(oop);
}
}
function digitMontgomerytimesmodulomInvModB(firstLarge, secondLarge, thirdLarge, mInv) {
var prod;
var thirdLen;
var firstLen;
var secondLen;
firstLen = BYTESIZEOF(firstLarge);
secondLen = BYTESIZEOF(secondLarge);
thirdLen = BYTESIZEOF(thirdLarge);
if (!(firstLen <= thirdLen)) {
return interpreterProxy.primitiveFail();
}
if (!(secondLen <= thirdLen)) {
return interpreterProxy.primitiveFail();
}
if (!((mInv >= 0) && (mInv <= 255))) {
return interpreterProxy.primitiveFail();
}
prod = interpreterProxy.instantiateClassindexableSize(interpreterProxy.classLargePositiveInteger(), thirdLen);
;
cDigitMontgomerylentimeslenmodulolenmInvModBinto(firstLarge.bytes, firstLen, secondLarge.bytes, secondLen, thirdLarge.bytes, thirdLen, mInv, prod.bytes);
return normalizePositive(prod);
}
/* Normalizes. */
function digitMultiplyLargewithnegative(firstInteger, secondInteger, neg) {
var longInt;
var resultClass;
var shortLen;
var shortInt;
var longLen;
var prod;
var secondLen;
var firstLen;
firstLen = BYTESIZEOF(firstInteger);
secondLen = BYTESIZEOF(secondInteger);
if (firstLen <= secondLen) {
shortInt = firstInteger;
shortLen = firstLen;
longInt = secondInteger;
longLen = secondLen;
} else {
shortInt = secondInteger;
shortLen = secondLen;
longInt = firstInteger;
longLen = firstLen;
}
if (neg) {
resultClass = interpreterProxy.classLargeNegativeInteger();
} else {
resultClass = interpreterProxy.classLargePositiveInteger();
}
prod = interpreterProxy.instantiateClassindexableSize(resultClass, longLen + shortLen);
;
cDigitMultiplylenwithleninto(shortInt.bytes, shortLen, longInt.bytes, longLen, prod.bytes);
return normalize(prod);
}
/* Argument has to be aLargeInteger! */
function digitOfBytesat(aBytesOop, ix) {
if (ix > BYTESIZEOF(aBytesOop)) {
return 0;
} else {
return unsafeByteOfat(aBytesOop, ix);
}
}
/* Normalizes. */
function digitSubLargewith(firstInteger, secondInteger) {
var smallerLen;
var larger;
var res;
var smaller;
var resLen;
var largerLen;