Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction flag

H. Peter Anvin
2008-03-06T17:14:44Z

H.J. Lu wrote:
> On Thu, Mar 6, 2008 at 8:23 AM, Jakub Jelinek <jakub@redhat.com> wrote:
>> On Thu, Mar 06, 2008 at 07:50:12AM -0800, H. Peter Anvin wrote:
>> > H.J. Lu wrote:
>> > >I agree with it. There is no right or wrong here Let's start from
>> > >scratch and figure out
>> > >what is the best way to handle this, assuming we are defining a new psABI.
>>
>> BTW, just tested icc and icc doesn't generate cld either (so it matches the
>> new gcc behavior).
>> char buf1[32], buf2[32];
>> void bar (void);
>> void foo (void)
>> {
>> __builtin_memset (buf1, 0, 32);
>> bar ();
>> __builtin_memset (buf2, 0, 32);
>> }
>>
>
> Icc follows the psABI. If we are saying icc/gcc 4.3 need a fix, we'd
> better define
> a new psABI first.
>

Not a fix, an (optional) workaround for a system bug.

-hpa