On 11.09.2014 13:42, Petr Salinger wrote: > Package: libc0.1 > Version: 2.13-38+deb7u2 > X-Debbugs-CC: [email protected] , [email protected] > > On Sat, 6 Sep 2014, Julian Taylor wrote: ... > > The thread started in kernel have different default precision > in FreeBSD compared to Linux. > > The initial value of precision is set-up before main() starts, > but not in each thread. > > We should think about how it should be fixed. > The new thread should either inherit FPU control word from parent, or it > should be created with the same value as original main(). > > Julian, please, could you verify behaviour of linux-i386 ?
i386 seems to inherit the parent control word. gcc test.c -g -pthread && ./a.out main starts with 37F set main to 7F thread starts with 7F set thread to 27F main after join 7F (on fisher main starts with 137F and thread starts with 127F) This also matches what System V Application Binary Interface for amd64 states in section 3.4.2: 3.4.2 Thread State New threads inherit the floating-point state of the parent thread and the state is private to the thread thereafter. -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: https://lists.debian.org/[email protected]
