Re: Possible miscompilation issue with floating point operations
Aurelien Jarno <[email protected]>
| Newsgroups | gmane.linux.debian.ports.mips |
|---|---|
| Message-ID | <[email protected]> |
On 2016-02-10 14:14, Sébastien Villemot wrote: > [Please Cc me on replies, I'm not subscribed to the list] > > Dear mips porters, > > I attach a C source code that, when compiled with gcc-5, crashes with > "Illegal instruction" on mips, while it works correctly when compiled > with gcc-4.9 [tested on minkus.debian.org]. > > The problem looks like a miscompilation (the code only does some basic > floating-point operations), but it was pointed out by Julien Cristau > that it could also be a kernel issue (since floating point instructions > are emulated on Debian mips hardware). This is actually a kernel issue, which has been fixed by this patch: https://git.kernel.org/linus/e4553573b37c3f72533683cb5f3a1ad300b18d37 We are working on getting the fix deployed on the build daemons. Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B [email protected] http://www.aurel32.net