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Re: PATCH: PR target/39590: inline asm %z on amd64 says "ll" instead of "q"
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.
Uros.