stan/jdk-24
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

8340189: 8339531 incorrect for Big Endian platforms

Browse Source 
Reviewed-by: mdoerr, amitkumar
This commit is contained in:
Per Minborg 2024-10-15 07:59:33 +00:00
parent e6698f51a1
commit 521effe017
1 changed files with 9 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
src/java.base/share/classes/jdk/internal/foreign/SegmentBulkOperations.java
View File

@ -200,8 +200,8 @@ public final class SegmentBulkOperations {
int offset = 0;
final int limit = length & (NATIVE_THRESHOLD_MISMATCH - 8);
for (; offset < limit; offset += 8) {
final long s = SCOPED_MEMORY_ACCESS.getLongUnaligned(src.sessionImpl(), src.unsafeGetBase(), src.unsafeGetOffset() + srcFromOffset + offset, !Architecture.isLittleEndian());
final long d = SCOPED_MEMORY_ACCESS.getLongUnaligned(dst.sessionImpl(), dst.unsafeGetBase(), dst.unsafeGetOffset() + dstFromOffset + offset, !Architecture.isLittleEndian());
final long s = SCOPED_MEMORY_ACCESS.getLongUnaligned(src.sessionImpl(), src.unsafeGetBase(), src.unsafeGetOffset() + srcFromOffset + offset, false);
final long d = SCOPED_MEMORY_ACCESS.getLongUnaligned(dst.sessionImpl(), dst.unsafeGetBase(), dst.unsafeGetOffset() + dstFromOffset + offset, false);
if (s != d) {
return start + offset + mismatch(s, d);
}
@ -210,8 +210,8 @@ public final class SegmentBulkOperations {
// 0...0X00
if (remaining >= 4) {
final int s = SCOPED_MEMORY_ACCESS.getIntUnaligned(src.sessionImpl(), src.unsafeGetBase(), src.unsafeGetOffset() + srcFromOffset + offset, !Architecture.isLittleEndian());
final int d = SCOPED_MEMORY_ACCESS.getIntUnaligned(dst.sessionImpl(), dst.unsafeGetBase(), dst.unsafeGetOffset() + dstFromOffset + offset, !Architecture.isLittleEndian());
final int s = SCOPED_MEMORY_ACCESS.getIntUnaligned(src.sessionImpl(), src.unsafeGetBase(), src.unsafeGetOffset() + srcFromOffset + offset, false);
final int d = SCOPED_MEMORY_ACCESS.getIntUnaligned(dst.sessionImpl(), dst.unsafeGetBase(), dst.unsafeGetOffset() + dstFromOffset + offset, false);
if (s != d) {
return start + offset + mismatch(s, d);
}
@ -220,8 +220,8 @@ public final class SegmentBulkOperations {
}
// 0...00X0
if (remaining >= 2) {
final short s = SCOPED_MEMORY_ACCESS.getShortUnaligned(src.sessionImpl(), src.unsafeGetBase(), src.unsafeGetOffset() + srcFromOffset + offset, !Architecture.isLittleEndian());
final short d = SCOPED_MEMORY_ACCESS.getShortUnaligned(dst.sessionImpl(), dst.unsafeGetBase(), dst.unsafeGetOffset() + dstFromOffset + offset, !Architecture.isLittleEndian());
final short s = SCOPED_MEMORY_ACCESS.getShortUnaligned(src.sessionImpl(), src.unsafeGetBase(), src.unsafeGetOffset() + srcFromOffset + offset, false);
final short d = SCOPED_MEMORY_ACCESS.getShortUnaligned(dst.sessionImpl(), dst.unsafeGetBase(), dst.unsafeGetOffset() + dstFromOffset + offset, false);
if (s != d) {
return start + offset + mismatch(s, d);
}
@ -243,26 +243,18 @@ public final class SegmentBulkOperations {
@ForceInline
private static int mismatch(long first, long second) {
final long x = first ^ second;
return (Architecture.isLittleEndian()
? Long.numberOfTrailingZeros(x)
: Long.numberOfLeadingZeros(x)) / 8;
return Long.numberOfTrailingZeros(x) / 8;
}
@ForceInline
private static int mismatch(int first, int second) {
final int x = first ^ second;
return (Architecture.isLittleEndian()
? Integer.numberOfTrailingZeros(x)
: Integer.numberOfLeadingZeros(x)) / 8;
return Integer.numberOfTrailingZeros(x) / 8;
}
@ForceInline
private static int mismatch(short first, short second) {
if (Architecture.isLittleEndian()) {
return ((0xff & first) == (0xff & second)) ? 1 : 0;
} else {
return ((0xff & first) == (0xff & second)) ? 0 : 1;
}
return ((0xff & first) == (0xff & second)) ? 1 : 0;
}
/**