RFR: 8302976: C2 intrinsification of Float.floatToFloat16 and Float.float16ToFloat yields different result than the interpreter
Sandhya Viswanathan
sviswanathan at openjdk.org
Wed Feb 22 02:20:00 UTC 2023
Change the java/lang/float.java and the corresponding shared runtime constant expression evaluation to generate QNaN.
The HW instructions generate QNaNs and not SNaNs for floating point instructions. This happens across double, float, and float16 data types. The most significant bit of mantissa is set to 1 for QNaNs.
-------------
Commit messages:
- 8302976: C2 intrinsification of Float.floatToFloat16 and Float.float16ToFloat yields different result than the interpreter
Changes: https://git.openjdk.org/jdk/pull/12704/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12704&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8302976
Stats: 8 lines in 4 files changed: 4 ins; 0 del; 4 mod
Patch: https://git.openjdk.org/jdk/pull/12704.diff
Fetch: git fetch https://git.openjdk.org/jdk pull/12704/head:pull/12704
PR: https://git.openjdk.org/jdk/pull/12704
More information about the core-libs-dev
mailing list