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8348870: Eliminate array bound checks in DecimalDigits

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Reviewed-by: liach, rgiulietti
This commit is contained in:
Shaojin Wen 2025-01-29 13:07:19 +00:00
parent fe6d9ab951
commit f98d9a3301
1 changed files with 4 additions and 4 deletions
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8
src/java.base/share/classes/jdk/internal/util/DecimalDigits.java
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@ -62,7 +62,7 @@ public final class DecimalDigits {
private static final short[] DIGITS;
static {
short[] digits = new short[10 * 10];
short[] digits = new short[128];
for (int i = 0; i < 10; i++) {
short hi = (short) (i + '0');
@ -394,7 +394,7 @@ public final class DecimalDigits {
* @param v to convert
*/
public static void putPair(char[] buf, int charPos, int v) {
int packed = DIGITS[v];
int packed = DIGITS[v & 0x7f];
buf[charPos ] = (char) (packed & 0xFF);
buf[charPos + 1] = (char) (packed >> 8);
}
@ -407,7 +407,7 @@ public final class DecimalDigits {
* @param v to convert
*/
public static void putPairLatin1(byte[] buf, int charPos, int v) {
int packed = DIGITS[v];
int packed = DIGITS[v & 0x7f];
putCharLatin1(buf, charPos, packed & 0xFF);
putCharLatin1(buf, charPos + 1, packed >> 8);
}
@ -420,7 +420,7 @@ public final class DecimalDigits {
* @param v to convert
*/
public static void putPairUTF16(byte[] buf, int charPos, int v) {
int packed = DIGITS[v];
int packed = DIGITS[v & 0x7f];
putCharUTF16(buf, charPos, packed & 0xFF);
putCharUTF16(buf, charPos + 1, packed >> 8);
}