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Re: [PATCH] ix86/Intel: don't require memory operand size specifier for PTWRITE


>>> On 15.11.17 at 14:24, <hjl.tools@gmail.com> wrote:
> On Wed, Nov 15, 2017 at 5:16 AM, Jan Beulich <JBeulich@suse.com> wrote:
>> Other than in 64-bit mode, in 32- and 16-bit modes operand size isn't
>> ambiguous.

With this ...

>> --- 2017-11-10/gas/testsuite/gas/i386/ptwrite.s
>> +++ 2017-11-10/gas/testsuite/gas/i386/ptwrite.s
>> @@ -9,4 +9,5 @@ _start:
>>
>>         .intel_syntax noprefix
>>         ptwrite ecx
>> +       ptwrite [ecx]
> 
> Do we also need such a test in x86-64-ptwrite.s?

... the answer is clearly no: The operand size _is_ ambiguous
there. In fact I have (as part of the larger patch talked about in
the other thread) queued an adjustment removing the suffix-less
AT&T variant there.

Jan


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