>>> On 17.11.10 at 10:08, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote: > On 11/17/2010 12:56 AM, Jeremy Fitzhardinge wrote: >> On 11/17/2010 12:52 AM, Jeremy Fitzhardinge wrote: >>> But, yes, %z0 sounds interesting. Is it documented anywhere? I think >>> I've tried to use it in the past and run into gcc bugs. >> This one: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39590 >> >> Should be OK in this case because there's no 64-bit values to be seen... > Hm, it fails when __ticket_t is 16 bits: > > /home/jeremy/git/linux/arch/x86/include/asm/spinlock.h: Assembler messages: > /home/jeremy/git/linux/arch/x86/include/asm/spinlock.h:73: Error: suffix > or operands invalid for `or' > > lock; ors $1, 2(%rbx) #, > > > So I don't think that's going to work out... Indeed, it's only with 4.5 that non-float operands are properly supported here. Sad. Jan _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
