[PATCH] x86-64 gcc generate wrong assembly instruction movabs for intel syntax

[Perez Read]

On Mon, Aug 12, 2013 at 9:51 PM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Mon, Aug 12, 2013 at 3:39 PM, Perez Read <netfirewall@gmail.com> wrote:
>
>>>>>> movabs is incorrectly translated into "mov [rax], -1", and causes
>>>>>> compile error "Error: ambiguous operand size for `mov' ".
>>>>>> It should be "mov QWORD PTR [rax], -1"
>>>>>>
>>>>>> Bootstrap passed. Regression tested on x86_64-unknown-linux-gnu (pc).
>>>>>>
>>>>>> 2013-08-10  Perez Read <netfirewall@gmail.com>
>>>>>>
>>>>>>         * config/i386/i386.md (*movabs<mode>_1) :  Add <ptrsize> PTR before
>>>>>>         operand 0 for intel asm alternative.
>>>>>>
>>>>>>         * testsuite/gcc.target/i386/movabs-1.c : New test.
>>>>>
>>>>> You should mention PR number in the ChangeLog.
>>>>>
>>>>> Looks OK, but I think that for consistency this decoration should also
>>>>> be added to *movabs<mode>_2 pattern.
>>>>>
>>>>> Uros.
>>>>
>>>> Hello,
>>>>
>>>> After the test, I think we can skip this pattern.
>>>> Because the operand 0 must be the register, the assembler will
>>>> determine the size automatically.
>>>
>>> As said, I don't want two similar patterns with a different asm
>>> template in i386.md. So, if decorating movabs<mode>_2 works OK, I
>>> propose to change both patterns with your change.
>>>
>>> Uros.
>>
>> There are new patch and changelog. Add "<ptrsize> PTR" to both patterns.
>> Bootstrap passed,  Regression tested on x86_64-unknown-linux-gnu (pc).
>>
>> 2013-08-10  Perez Read <netfirewall@gmail.com>
>>
>>          PR target/58132
>>
>>          * config/i386/i386.md (*movabs<mode>_1) :  Add <ptrsize> PTR before
>>          operand 0 for intel asm alternative.
>>
>>          * testsuite/gcc.target/i386/movabs-1.c : New test.
>>
>> 2013-08-12  Perez Read <netfirewall@gmail.com>
>>
>>          PR target/58132
>>
>>          * config/i386/i386.md (*movabs<mode>_2) :  Add <ptrsize> PTR before
>>          operand 1 for intel asm alternative.
>
> Just merge these two ChangeLog entries.
>
> OK with this change.
>
> BTW: Do you have SVN committ access? Otherwise, I will take care to
> merge your change.
>
> Uros.

Ok, and I add a space before second "<ptrsize> PTR", which corrects
the coding style.
I don't have SVN committ access, so thanks for helping me.

2013-08-12  Perez Read <netfirewall@gmail.com>

         PR target/58132
         * config/i386/i386.md (*movabs<mode>_1) :  Add <ptrsize> PTR before
         operand 0 for intel asm alternative.
         (*movabs<mode>_2): Ditto for operand 1.

         * testsuite/gcc.target/i386/movabs-1.c : New test.


Thanks,
Perez
-------------- next part --------------
A non-text attachment was scrubbed...
Name: movabs.patch
Type: application/octet-stream
Size: 1310 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20130812/14966d81/attachment.obj>