74 lines
2.7 KiB
Java
74 lines
2.7 KiB
Java
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package com.google.common.math;
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import com.google.common.base.Preconditions;
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import java.math.BigInteger;
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/* loaded from: classes2.dex */
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final class DoubleUtils {
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static final int EXPONENT_BIAS = 1023;
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static final long EXPONENT_MASK = 9218868437227405312L;
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static final long IMPLICIT_BIT = 4503599627370496L;
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static final long ONE_BITS = 4607182418800017408L;
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static final int SIGNIFICAND_BITS = 52;
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static final long SIGNIFICAND_MASK = 4503599627370495L;
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static final long SIGN_MASK = Long.MIN_VALUE;
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private DoubleUtils() {
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static double nextDown(double d) {
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return -Math.nextUp(-d);
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static long getSignificand(double d) {
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Preconditions.checkArgument(isFinite(d), "not a normal value");
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int exponent = Math.getExponent(d);
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long doubleToRawLongBits = Double.doubleToRawLongBits(d) & SIGNIFICAND_MASK;
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return exponent == -1023 ? doubleToRawLongBits << 1 : doubleToRawLongBits | IMPLICIT_BIT;
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static boolean isFinite(double d) {
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return Math.getExponent(d) <= EXPONENT_BIAS;
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static boolean isNormal(double d) {
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return Math.getExponent(d) >= -1022;
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static double scaleNormalize(double d) {
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return Double.longBitsToDouble((Double.doubleToRawLongBits(d) & SIGNIFICAND_MASK) | ONE_BITS);
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static double bigToDouble(BigInteger bigInteger) {
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BigInteger abs = bigInteger.abs();
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int bitLength = abs.bitLength();
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int i = bitLength - 1;
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if (i < 63) {
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return bigInteger.longValue();
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}
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if (i > EXPONENT_BIAS) {
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return bigInteger.signum() * Double.POSITIVE_INFINITY;
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}
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int i2 = bitLength - 54;
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long longValue = abs.shiftRight(i2).longValue();
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long j = longValue >> 1;
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long j2 = SIGNIFICAND_MASK & j;
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if ((longValue & 1) != 0 && ((j & 1) != 0 || abs.getLowestSetBit() < i2)) {
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j2++;
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}
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return Double.longBitsToDouble((((bitLength + 1022) << 52) + j2) | (bigInteger.signum() & SIGN_MASK));
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public static double ensureNonNegative(double d) {
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Preconditions.checkArgument(!Double.isNaN(d));
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return Math.max(d, 0.0d);
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}
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}
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