This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: PATCH: PR target/39590: inline asm %z on amd64 says "ll" instead of "q"
On Wed, Apr 22, 2009 at 5:54 AM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Wed, Apr 22, 2009 at 2:28 PM, Jakub Jelinek <jakub@redhat.com> wrote:
>
>>> I think that we should move special fild/fist handling out of 'z' into
>>> new 'Z' operand modifier. This simplifies code a lot, and enables all
>>> sorts of special fild/fist handling to be handled in one place without
>>> overloading (otherwise undocumented!) 'z' modifier too much.
>>
>> Wouldn't it be better to keep %zN as is and add %ZN which would expand
>> to q instead of ll for 64-bit operand?
>> When a new modifier is added, I don't see any advantages of modifying the
>> behaviour of %zN.
>
> This is in fact the core of the problem. People are using %z, and this
> modifier will generate "ll" suffix when DImode memory operand is
> processed. We are changing %z to avoid this, so %z will always
> generate "q", no matter if assembler supports fildq or not.
>
Do we need a testcase for "%z"?
Thanks.
--
H.J.