[PATCH] D28688: MC: Introduce the ABS8 symbol modifier.

[Rafael Avila de Espindola via llvm-commits]

Peter Collingbourne <peter at pcc.me.uk> writes:

> On Mon, Jan 30, 2017 at 10:41 AM, Rafael Avila de Espindola <
> rafael.espindola at gmail.com> wrote:
>
>> Peter Collingbourne <peter at pcc.me.uk> writes:
>>
>> > That instruction doesn't have the right semantics. I need to be able to
>> > express a 32-bit (or 64-bit) comparison where the 8-bit operand is sign
>> > extended. See the test case.
>>
>> I see. Could you add that to the extension documentation?
>>
>
> I already did, see llvm/docs/Extensions.rst.

I mean the note as to why this is not the same as using a cmpb.

Cheers,
Rafael