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8357913: Add @Stable to BigInteger and BigDecimal

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Reviewed-by: rgiulietti, liach
This commit is contained in:
Shaojin Wen 2025-07-21 09:37:56 +00:00
parent 1bd683b588
commit 8f1bb59e1a
2 changed files with 10 additions and 0 deletions
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9
src/java.base/share/classes/java/math/BigDecimal.java
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@ -44,6 +44,7 @@ import jdk.internal.access.JavaLangAccess;
import jdk.internal.access.SharedSecrets;
import jdk.internal.math.FormattedFPDecimal;
import jdk.internal.util.DecimalDigits;
import jdk.internal.vm.annotation.Stable;
/**
* Immutable, arbitrary-precision signed decimal numbers. A {@code
@ -409,6 +410,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
private static final long serialVersionUID = 6108874887143696463L;
// Cache of common small BigDecimal values.
@Stable
private static final BigDecimal[] ZERO_THROUGH_TEN = {
new BigDecimal(BigInteger.ZERO, 0, 0, 1),
new BigDecimal(BigInteger.ONE, 1, 0, 1),
@ -424,6 +426,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
};
// Cache of zero scaled by 0 - 15
@Stable
private static final BigDecimal[] ZERO_SCALED_BY = {
ZERO_THROUGH_TEN[0],
new BigDecimal(BigInteger.ZERO, 0, 1, 1),
@ -4084,6 +4087,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
* Powers of 10 which can be represented exactly in {@code
* double}.
*/
@Stable
private static final double[] DOUBLE_10_POW = {
1.0e0, 1.0e1, 1.0e2, 1.0e3, 1.0e4, 1.0e5,
1.0e6, 1.0e7, 1.0e8, 1.0e9, 1.0e10, 1.0e11,
@ -4095,6 +4099,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
* Powers of 10 which can be represented exactly in {@code
* float}.
*/
@Stable
private static final float[] FLOAT_10_POW = {
1.0e0f, 1.0e1f, 1.0e2f, 1.0e3f, 1.0e4f, 1.0e5f,
1.0e6f, 1.0e7f, 1.0e8f, 1.0e9f, 1.0e10f
@ -4291,6 +4296,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
}
}
@Stable
private static final long[] LONG_TEN_POWERS_TABLE = {
1, // 0 / 10^0
10, // 1 / 10^1
@ -4340,6 +4346,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
private static final int BIG_TEN_POWERS_TABLE_MAX =
16 * BIG_TEN_POWERS_TABLE_INITLEN;
@Stable
private static final long[] THRESHOLDS_TABLE = {
Long.MAX_VALUE, // 0
Long.MAX_VALUE/10L, // 1
@ -5091,6 +5098,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
/**
* {@code FIVE_TO_2_TO[n] == 5^(2^n)}
*/
@Stable
private static final BigInteger[] FIVE_TO_2_TO = new BigInteger[16 + 1];
static {
@ -5889,6 +5897,7 @@ public class BigDecimal extends Number implements Comparable<BigDecimal> {
return null;
}
@Stable
private static final long[][] LONGLONG_TEN_POWERS_TABLE = {
{ 0L, 0x8AC7230489E80000L }, //10^19
{ 0x5L, 0x6bc75e2d63100000L }, //10^20

1
src/java.base/share/classes/java/math/BigInteger.java
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@ -1303,6 +1303,7 @@ public class BigInteger extends Number implements Comparable<BigInteger> {
private static volatile BigInteger[][] powerCache;
/** The cache of logarithms of radices for base conversion. */
@Stable
private static final double[] logCache;
/** The natural log of 2. This is used in computing cache indices. */