A bug in GCC causes shared libraries linked with -ffast-math to disable denormal arithmetic. This breaks Java's floating-point semantics.
The bug is https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55522 One solution is to save and restore the floating-point control word around System.loadLibrary(). This isn't perfect, because some shared library might load another shared library at runtime, but it's a lot better than what we do now. However, this fix is not complete. `dlopen()` is called from many places in the JDK. I guess the best thing to do is find and wrap them all. I'd like to hear people's opinions. ------------- Commit messages: - Whitespace - 8295159: DSO created with -ffast-math breaks Java floating-point arithmetic - 8295159: test cases Changes: https://git.openjdk.org/jdk/pull/10661/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10661&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8295159 Stats: 193 lines in 5 files changed: 171 ins; 19 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/10661.diff Fetch: git fetch https://git.openjdk.org/jdk pull/10661/head:pull/10661 PR: https://git.openjdk.org/jdk/pull/10661
