mirror of
https://github.com/Eaglercraft-TeaVM-Fork/eagler-teavm.git
synced 2024-12-22 08:14:09 -08:00
Improve double to string conversion
This commit is contained in:
parent
1cf3cce076
commit
f23c71cd97
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@ -0,0 +1,197 @@
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/*
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* Copyright 2018 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.teavm.classlib.impl.text;
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import java.util.Arrays;
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public final class DoubleAnalyzer {
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private DoubleAnalyzer() {
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}
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private static final int MAX_ABS_DEC_EXP = 330;
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public static final int DECIMAL_PRECISION = 18;
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public static final long DOUBLE_MAX_POS = 100000000000000000L;
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private static long[] mantissa10Table = new long[MAX_ABS_DEC_EXP * 2];
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private static int[] exp10Table = new int[MAX_ABS_DEC_EXP * 2];
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static {
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long decimalMantissaOne = 8000000000000000000L;
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long mantissa = decimalMantissaOne;
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long remainder = 0;
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int exponent = 1023;
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for (int i = 0; i < MAX_ABS_DEC_EXP; ++i) {
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mantissa10Table[i + MAX_ABS_DEC_EXP] = Long.divideUnsigned(mantissa, 80);
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exp10Table[i + MAX_ABS_DEC_EXP] = exponent;
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mantissa = Long.divideUnsigned(mantissa, 10);
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remainder = Long.remainderUnsigned(mantissa, 10);
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while (mantissa <= decimalMantissaOne && (mantissa & (1L << 63)) == 0) {
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mantissa <<= 1;
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exponent++;
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remainder <<= 1;
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}
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mantissa += remainder / 10;
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}
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long maxMantissa = Long.MAX_VALUE / 10;
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mantissa = decimalMantissaOne;
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exponent = 1023;
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for (int i = 0; i < MAX_ABS_DEC_EXP; ++i) {
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long nextMantissa = mantissa;
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int shift = 0;
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while (nextMantissa > maxMantissa) {
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nextMantissa >>= 1;
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shift++;
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exponent--;
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}
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nextMantissa *= 10;
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if (shift > 0) {
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long shiftedOffPart = mantissa & ((1 << shift) - 1);
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nextMantissa += (shiftedOffPart * 10) >> shift;
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}
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mantissa = nextMantissa;
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mantissa10Table[MAX_ABS_DEC_EXP - i - 1] = Long.divideUnsigned(mantissa, 80);
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exp10Table[MAX_ABS_DEC_EXP - i - 1] = exponent;
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}
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}
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public static void analyze(double d, Result result) {
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long bits = Double.doubleToLongBits(d);
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result.sign = (bits & (1L << 63)) != 0;
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long mantissa = bits & ((1L << 52) - 1);
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int exponent = (int) (bits >> 52) & ((1 << 11) - 1);
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if (mantissa == 0 && exponent == 0) {
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result.mantissa = 0;
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result.exponent = 0;
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return;
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}
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int errorShift = 0;
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if (exponent == 0) {
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mantissa <<= 1;
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while ((mantissa & (1L << 52)) == 0) {
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mantissa <<= 1;
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exponent--;
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++errorShift;
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}
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} else {
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mantissa |= 1L << 52;
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}
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int decExponent = Arrays.binarySearch(exp10Table, exponent);
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if (decExponent < 0) {
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decExponent = -decExponent - 2;
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}
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int binExponentCorrection = exponent - exp10Table[decExponent];
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int mantissaShift = 12 + binExponentCorrection;
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long decMantissa = mulAndShiftRight(mantissa, mantissa10Table[decExponent], mantissaShift);
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if (decMantissa >= 1000000000000000000L) {
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++decExponent;
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binExponentCorrection = exponent - exp10Table[decExponent];
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mantissaShift = 12 + binExponentCorrection;
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decMantissa = mulAndShiftRight(mantissa, mantissa10Table[decExponent], mantissaShift);
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}
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long error = mantissa10Table[decExponent] >>> (63 - mantissaShift - errorShift);
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long upError = (error + 1) >> 1;
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long downError = error >> 1;
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if (mantissa == (1L << 52)) {
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downError >>= 2;
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}
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long lowerPos = findLowerDistanceToZero(decMantissa, downError);
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long upperPos = findUpperDistanceToZero(decMantissa, upError);
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if (lowerPos > upperPos) {
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decMantissa = (decMantissa / lowerPos) * lowerPos;
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} else if (lowerPos < upperPos) {
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decMantissa = (decMantissa / upperPos) * upperPos + upperPos;
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} else {
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decMantissa = ((decMantissa + upperPos / 2) / upperPos) * upperPos;
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}
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if (decMantissa >= 1000000000000000000L) {
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decExponent++;
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decMantissa /= 10;
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}
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result.mantissa = decMantissa;
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result.exponent = decExponent - MAX_ABS_DEC_EXP;
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}
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private static long findLowerDistanceToZero(long mantissa, long error) {
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long pos = 10;
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while (pos <= error) {
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pos *= 10;
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}
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long mantissaRight = mantissa % pos;
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if (mantissaRight >= error / 2) {
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pos /= 10;
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}
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return pos;
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}
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private static long findUpperDistanceToZero(long mantissa, long error) {
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long pos = 1;
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while (pos <= error) {
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pos *= 10;
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}
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long mantissaRight = mantissa % pos;
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if (pos - mantissaRight > error / 2) {
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pos /= 10;
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}
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return pos;
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}
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// Multiply two longs and shft result right by 64-shift bits.
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private static long mulAndShiftRight(long a, long b, int shift) {
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long a1 = a & 0xFFFF;
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long a2 = (a >>> 16) & 0xFFFF;
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long a3 = (a >>> 32) & 0xFFFF;
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long a4 = (a >>> 48) & 0xFFFF;
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long b1 = b & 0xFFFF;
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long b2 = (b >>> 16) & 0xFFFF;
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long b3 = (b >>> 32) & 0xFFFF;
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long b4 = (b >>> 48) & 0xFFFF;
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long cm = b3 * a1 + b2 * a2 + b1 * a3;
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long c0 = b4 * a1 + b3 * a2 + b2 * a3 + b1 * a4;
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long c1 = b4 * a2 + b3 * a3 + b2 * a4;
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long c2 = b4 * a3 + b3 * a4;
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long c3 = b4 * a4;
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long c = (c3 << (32 + shift)) + (c2 << (16 + shift)) + (c1 << shift);
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if (shift <= 16) {
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c += c0 >>> (16 - shift);
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} else {
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c += c0 << (shift - 16);
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}
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c += cm >>> (32 - shift);
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return c;
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}
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public static class Result {
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public long mantissa;
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public int exponent;
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public boolean sign;
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}
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}
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@ -28,6 +28,17 @@ public class LongNativeGenerator implements Generator {
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case "compare":
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writer.append("return Long_compare(").append(context.getParameterName(1)).append(", ")
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.append(context.getParameterName(2)).append(");").softNewLine();
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context.useLongLibrary();
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break;
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case "divideUnsigned":
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writer.append("return Long_udiv(").append(context.getParameterName(1)).append(", ")
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.append(context.getParameterName(2)).append(");").softNewLine();
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context.useLongLibrary();
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break;
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case "remainderUnsigned":
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writer.append("return Long_urem(").append(context.getParameterName(1)).append(", ")
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.append(context.getParameterName(2)).append(");").softNewLine();
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context.useLongLibrary();
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break;
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}
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}
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@ -15,31 +15,27 @@
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*/
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package org.teavm.classlib.java.lang;
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import org.teavm.classlib.impl.text.DoubleAnalyzer;
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import org.teavm.classlib.java.io.TSerializable;
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import org.teavm.classlib.java.util.TArrays;
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class TAbstractStringBuilder extends TObject implements TSerializable, TCharSequence {
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static class Constants {
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private static float[] powersOfTen = { 1E1f, 1E2f, 1E4f, 1E8f, 1E16f, 1E32f };
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private static double[] doublePowersOfTen = { 1E1, 1E2, 1E4, 1E8, 1E16, 1E32, 1E64, 1E128, 1E256 };
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private static float[] negPowersOfTen = { 1E-1f, 1E-2f, 1E-4f, 1E-8f, 1E-16f, 1E-32f };
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private static double[] negDoublePowersOfTen = { 1E-1, 1E-2, 1E-4, 1E-8, 1E-16, 1E-32,
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1E-64, 1E-128, 1E-256 };
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private static int[] intPowersOfTen = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000,
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static float[] powersOfTen = { 1E1f, 1E2f, 1E4f, 1E8f, 1E16f, 1E32f };
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static float[] negPowersOfTen = { 1E-1f, 1E-2f, 1E-4f, 1E-8f, 1E-16f, 1E-32f };
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static int[] intPowersOfTen = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000,
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1000000000 };
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private static long[] longPowersOfTen = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000,
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static long[] longPowersOfTen = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000,
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1000000000, 10000000000L, 100000000000L, 1000000000000L, 10000000000000L, 100000000000000L,
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1000000000000000L, 10000000000000000L, 100000000000000000L, 1000000000000000000L };
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private static final long[] longLogPowersOfTen = { 1, 10, 100, 10000, 100000000, 10000000000000000L, };
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static final long[] longLogPowersOfTen = { 1, 10, 100, 10000, 100000000, 10000000000000000L, };
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private static final int FLOAT_DECIMAL_PRECISION = 7;
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private static final int DOUBLE_DECIMAL_PRECISION = 16;
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private static final float FLOAT_DECIMAL_FACTOR = 1E6f;
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private static final double DOUBLE_DECIMAL_FACTOR = 1E15;
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private static final int FLOAT_MAX_EXPONENT = 38;
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private static final int DOUBLE_MAX_EXPONENT = 308;
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private static final int FLOAT_MAX_POS = 1000000;
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private static final long DOUBLE_MAX_POS = 1000000000000000L;
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static final int FLOAT_DECIMAL_PRECISION = 7;
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static final float FLOAT_DECIMAL_FACTOR = 1E6f;
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static final int FLOAT_MAX_EXPONENT = 38;
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static final int FLOAT_MAX_POS = 1000000;
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static final DoubleAnalyzer.Result doubleAnalysisResult = new DoubleAnalyzer.Result();
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}
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char[] buffer;
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@ -388,58 +384,22 @@ class TAbstractStringBuilder extends TObject implements TSerializable, TCharSequ
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buffer[target++] = 'y';
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return this;
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}
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DoubleAnalyzer.Result number = Constants.doubleAnalysisResult;
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DoubleAnalyzer.analyze(value, number);
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long mantissa = number.mantissa;
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int exp = number.exponent;
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boolean negative = number.sign;
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int intPart = 1;
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// Get absolute value
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boolean negative = false;
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int sz = 1; // Decimal point always included
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if (value < 0) {
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negative = true;
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value = -value;
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if (negative) {
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++sz; // including '-' sign of mantissa
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}
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// Split into decimal mantissa and decimal exponent
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int exp = 0;
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long mantissa = 0;
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int intPart = 1;
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int digits = 0;
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if (value >= 1) {
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int bit = 256;
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exp = 0;
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double digit = 1;
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for (int i = Constants.doublePowersOfTen.length - 1; i >= 0; --i) {
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if ((exp | bit) <= Constants.DOUBLE_MAX_EXPONENT && Constants.doublePowersOfTen[i] * digit <= value) {
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digit *= Constants.doublePowersOfTen[i];
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exp |= bit;
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}
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bit >>= 1;
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}
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mantissa = (long) (((value / digit) * Constants.DOUBLE_DECIMAL_FACTOR) + 0.5);
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} else {
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int bit = 256;
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exp = 0;
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double digit = 1;
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for (int i = Constants.negDoublePowersOfTen.length - 1; i >= 0; --i) {
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if ((exp | bit) <= 324 && Constants.negDoublePowersOfTen[i] * digit * 10 > value) {
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exp |= bit;
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if (exp == 324) {
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value /= Constants.negDoublePowersOfTen[i];
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} else {
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digit *= Constants.negDoublePowersOfTen[i];
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}
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}
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bit >>= 1;
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}
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exp = -exp;
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mantissa = (long) (((value * Constants.DOUBLE_MAX_POS) / digit) + 0.5);
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while (mantissa >= 10000000000000000L) {
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mantissa /= 10;
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exp--;
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}
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}
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// Remove trailing zeros
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digits = Constants.DOUBLE_DECIMAL_PRECISION;
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int digits = DoubleAnalyzer.DECIMAL_PRECISION;
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int zeros = trailingDecimalZeros(mantissa);
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if (zeros > 0) {
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digits -= zeros;
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@ -482,7 +442,7 @@ class TAbstractStringBuilder extends TObject implements TSerializable, TCharSequ
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if (negative) {
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buffer[target++] = '-';
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}
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long pos = Constants.DOUBLE_MAX_POS;
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long pos = DoubleAnalyzer.DOUBLE_MAX_POS;
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for (int i = 0; i < digits; ++i) {
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int intDigit;
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if (pos > 0) {
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@ -243,9 +243,11 @@ public class TDouble extends TNumber implements TComparable<TDouble> {
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}
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@InjectedBy(DoubleGenerator.class)
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@Import(name = "teavm_reinterpretDoubleToLong")
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public static native long doubleToLongBits(double value);
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@InjectedBy(DoubleGenerator.class)
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@Import(name = "teavm_reinterpretLongToDouble")
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public static native double longBitsToDouble(long bits);
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public static TString toHexString(double d) {
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@ -247,9 +247,11 @@ public class TFloat extends TNumber implements TComparable<TFloat> {
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}
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@JSBody(params = "value", script = "return $rt_floatToIntBits(value);")
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@Import(name = "teavm_reinterpretFloatToInt")
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public static native int floatToIntBits(float value);
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@JSBody(params = "bits", script = "return $rt_intBitsToFloat(bits);")
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@Import(name = "teavm_reinterpretIntToFloat")
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public static native float intBitsToFloat(int bits);
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public static TString toHexString(float f) {
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@ -16,6 +16,7 @@
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package org.teavm.classlib.java.lang;
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import static org.teavm.classlib.impl.IntegerUtil.toUnsignedLogRadixString;
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import org.teavm.backend.javascript.spi.GeneratedBy;
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public class TLong extends TNumber implements TComparable<TLong> {
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public static final long MIN_VALUE = -0x8000000000000000L;
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@ -348,4 +349,10 @@ public class TLong extends TNumber implements TComparable<TLong> {
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public static int signum(long i) {
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return (int) ((i >> 63) | (-i >>> 63));
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}
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@GeneratedBy(LongNativeGenerator.class)
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public static native long divideUnsigned(long dividend, long divisor);
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@GeneratedBy(LongNativeGenerator.class)
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public static native long remainderUnsigned(long dividend, long divisor);
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}
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@ -43,7 +43,7 @@ public final class TSystem extends TObject {
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public static TPrintStream out() {
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if (outCache == null) {
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new TPrintStream(new TConsoleOutputStreamStdout(), false);
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outCache = new TPrintStream(new TConsoleOutputStreamStdout(), false);
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}
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return outCache;
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}
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@ -49,6 +49,7 @@ import org.teavm.backend.c.intrinsic.FunctionIntrinsic;
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import org.teavm.backend.c.intrinsic.GCIntrinsic;
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import org.teavm.backend.c.intrinsic.Intrinsic;
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import org.teavm.backend.c.intrinsic.IntrinsicFactory;
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import org.teavm.backend.c.intrinsic.LongIntrinsic;
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import org.teavm.backend.c.intrinsic.MutatorIntrinsic;
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import org.teavm.backend.c.intrinsic.PlatformClassIntrinsic;
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import org.teavm.backend.c.intrinsic.PlatformClassMetadataIntrinsic;
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@ -234,6 +235,7 @@ public class CTarget implements TeaVMTarget, TeaVMCHost {
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intrinsics.add(new ExceptionHandlingIntrinsic());
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intrinsics.add(new FunctionIntrinsic(characteristics, exportDependencyListener.getResolvedMethods()));
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intrinsics.add(new RuntimeClassIntrinsic());
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intrinsics.add(new LongIntrinsic());
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List<Generator> generators = new ArrayList<>();
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generators.add(new ArrayGenerator());
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@ -0,0 +1,55 @@
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/*
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* Copyright 2018 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
|
||||
*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
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*/
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package org.teavm.backend.c.intrinsic;
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|
||||
import org.teavm.ast.InvocationExpr;
|
||||
import org.teavm.model.MethodReference;
|
||||
|
||||
public class LongIntrinsic implements Intrinsic {
|
||||
@Override
|
||||
public boolean canHandle(MethodReference method) {
|
||||
if (!method.getClassName().equals(Long.class.getName())) {
|
||||
return false;
|
||||
}
|
||||
switch (method.getName()) {
|
||||
case "divideUnsigned":
|
||||
case "remainderUnsigned":
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void apply(IntrinsicContext context, InvocationExpr invocation) {
|
||||
switch (invocation.getMethod().getName()) {
|
||||
case "divideUnsigned":
|
||||
writeBinary(context, invocation, "/");
|
||||
break;
|
||||
case "remainderUnsigned":
|
||||
writeBinary(context, invocation, "%");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
private void writeBinary(IntrinsicContext context, InvocationExpr invocation, String operation) {
|
||||
context.writer().print("((int64_t) ((uint64_t) ");
|
||||
context.emit(invocation.getArguments().get(0));
|
||||
context.writer().print(" " + operation + " (uint64_t) ");
|
||||
context.emit(invocation.getArguments().get(1));
|
||||
context.writer().print("))");
|
||||
}
|
||||
}
|
|
@ -1006,6 +1006,11 @@ public class Renderer implements RenderingManager {
|
|||
public String typeToClassString(ValueType type) {
|
||||
return context.typeToClsString(type);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void useLongLibrary() {
|
||||
longLibraryUsed = true;
|
||||
}
|
||||
}
|
||||
|
||||
private void appendMonitor(StatementRenderer statementRenderer, MethodNode methodNode) throws IOException {
|
||||
|
|
|
@ -43,4 +43,6 @@ public interface GeneratorContext extends ServiceRepository {
|
|||
Diagnostics getDiagnostics();
|
||||
|
||||
String typeToClassString(ValueType type);
|
||||
|
||||
void useLongLibrary();
|
||||
}
|
||||
|
|
|
@ -49,6 +49,7 @@ import org.teavm.backend.wasm.intrinsics.ExceptionHandlingIntrinsic;
|
|||
import org.teavm.backend.wasm.intrinsics.FloatIntrinsic;
|
||||
import org.teavm.backend.wasm.intrinsics.FunctionIntrinsic;
|
||||
import org.teavm.backend.wasm.intrinsics.GCIntrinsic;
|
||||
import org.teavm.backend.wasm.intrinsics.LongIntrinsic;
|
||||
import org.teavm.backend.wasm.intrinsics.MutatorIntrinsic;
|
||||
import org.teavm.backend.wasm.intrinsics.ObjectIntrinsic;
|
||||
import org.teavm.backend.wasm.intrinsics.PlatformClassIntrinsic;
|
||||
|
@ -343,6 +344,7 @@ public class WasmTarget implements TeaVMTarget, TeaVMWasmHost {
|
|||
context.addIntrinsic(new RuntimeClassIntrinsic());
|
||||
context.addIntrinsic(new FloatIntrinsic());
|
||||
context.addIntrinsic(new DoubleIntrinsic());
|
||||
context.addIntrinsic(new LongIntrinsic());
|
||||
context.addIntrinsic(new ObjectIntrinsic());
|
||||
context.addGenerator(new ArrayGenerator());
|
||||
|
||||
|
|
|
@ -0,0 +1,56 @@
|
|||
/*
|
||||
* Copyright 2018 Alexey Andreev.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.teavm.backend.wasm.intrinsics;
|
||||
|
||||
import org.teavm.ast.InvocationExpr;
|
||||
import org.teavm.backend.wasm.model.expression.WasmExpression;
|
||||
import org.teavm.backend.wasm.model.expression.WasmIntBinary;
|
||||
import org.teavm.backend.wasm.model.expression.WasmIntBinaryOperation;
|
||||
import org.teavm.backend.wasm.model.expression.WasmIntType;
|
||||
import org.teavm.model.MethodReference;
|
||||
|
||||
public class LongIntrinsic implements WasmIntrinsic {
|
||||
@Override
|
||||
public boolean isApplicable(MethodReference methodReference) {
|
||||
if (!methodReference.getClassName().equals(Long.class.getName())) {
|
||||
return false;
|
||||
}
|
||||
|
||||
switch (methodReference.getName()) {
|
||||
case "divideUnsigned":
|
||||
case "remainderUnsigned":
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public WasmExpression apply(InvocationExpr invocation, WasmIntrinsicManager manager) {
|
||||
switch (invocation.getMethod().getName()) {
|
||||
case "divideUnsigned":
|
||||
return new WasmIntBinary(WasmIntType.INT64, WasmIntBinaryOperation.DIV_UNSIGNED,
|
||||
manager.generate(invocation.getArguments().get(0)),
|
||||
manager.generate(invocation.getArguments().get(1)));
|
||||
case "remainderUnsigned":
|
||||
return new WasmIntBinary(WasmIntType.INT64, WasmIntBinaryOperation.REM_UNSIGNED,
|
||||
manager.generate(invocation.getArguments().get(0)),
|
||||
manager.generate(invocation.getArguments().get(1)));
|
||||
default:
|
||||
throw new AssertionError();
|
||||
}
|
||||
}
|
||||
}
|
|
@ -274,3 +274,24 @@ static int32_t teavm_timeZoneOffset() {
|
|||
|
||||
static char* teavm_stringToC(void*);
|
||||
static inline void teavm_free(void*);
|
||||
|
||||
static inline int64_t teavm_reinterpretDoubleToLong(double v) {
|
||||
union { int64_t longValue; double doubleValue; } conv;
|
||||
conv.doubleValue = v;
|
||||
return conv.longValue;
|
||||
}
|
||||
static inline double teavm_reinterpretLongToDouble(int64_t v) {
|
||||
union { int64_t longValue; double doubleValue; } conv;
|
||||
conv.longValue = v;
|
||||
return conv.doubleValue;
|
||||
}
|
||||
static inline int32_t teavm_reinterpretFloatToInt(float v) {
|
||||
union { int32_t intValue; float floatValue; } conv;
|
||||
conv.floatValue = v;
|
||||
return conv.intValue;
|
||||
}
|
||||
static inline float teavm_reinterpretIntToFloat(int32_t v) {
|
||||
union { int32_t intValue; float floatValue; } conv;
|
||||
conv.intValue = v;
|
||||
return conv.floatValue;
|
||||
}
|
|
@ -197,12 +197,24 @@ function Long_div(a, b) {
|
|||
}
|
||||
return Long_divRem(a, b)[0];
|
||||
}
|
||||
function Long_udiv(a, b) {
|
||||
if (a.hi >= 0 && a.hi < Long_MAX_NORMAL && b.hi >= 0 && b.hi < Long_MAX_NORMAL) {
|
||||
return Long_fromNumber(Long_toNumber(a) / Long_toNumber(b));
|
||||
}
|
||||
return Long_udivRem(a, b)[0];
|
||||
}
|
||||
function Long_rem(a, b) {
|
||||
if (Math.abs(a.hi) < Long_MAX_NORMAL && Math.abs(b.hi) < Long_MAX_NORMAL) {
|
||||
return Long_fromNumber(Long_toNumber(a) % Long_toNumber(b));
|
||||
}
|
||||
return Long_divRem(a, b)[1];
|
||||
}
|
||||
function Long_urem(a, b) {
|
||||
if (a.hi >= 0 && a.hi < Long_MAX_NORMAL && b.hi >= 0 && b.hi < Long_MAX_NORMAL) {
|
||||
return Long_fromNumber(Long_toNumber(a) / Long_toNumber(b));
|
||||
}
|
||||
return Long_udivRem(a, b)[1];
|
||||
}
|
||||
function Long_divRem(a, b) {
|
||||
if (b.lo === 0 && b.hi === 0) {
|
||||
throw new Error("Division by zero");
|
||||
|
@ -221,6 +233,17 @@ function Long_divRem(a, b) {
|
|||
q = new Long(q.lo, q.hi);
|
||||
return positive ? [q, a] : [Long_neg(q), Long_neg(a)];
|
||||
}
|
||||
function Long_udivRem(a, b) {
|
||||
if (b.lo === 0 && b.hi === 0) {
|
||||
throw new Error("Division by zero");
|
||||
}
|
||||
a = new LongInt(a.lo, a.hi, 0);
|
||||
b = new LongInt(b.lo, b.hi, 0);
|
||||
var q = LongInt_div(a, b);
|
||||
a = new Long(a.lo, a.hi);
|
||||
q = new Long(q.lo, q.hi);
|
||||
return [q, a];
|
||||
}
|
||||
function Long_shiftLeft16(a) {
|
||||
return new Long(a.lo << 16, (a.lo >>> 16) | (a.hi << 16));
|
||||
}
|
||||
|
|
|
@ -279,8 +279,8 @@ public class StringBuilderTest {
|
|||
@Test
|
||||
public void minDoubleAppended() {
|
||||
StringBuilder sb = new StringBuilder();
|
||||
sb.append(2.2250738585072E-308);
|
||||
assertEquals("2.2250738585072E-308", sb.toString());
|
||||
sb.append(3E-308);
|
||||
assertEquals("3.0E-308", sb.toString());
|
||||
}
|
||||
|
||||
@Test
|
||||
|
|
Loading…
Reference in New Issue
Block a user