Re: gas and prefix's on x86

[Hans-Bernhard Broeker]

Andrew Macleod <address@hidden> wrote:

> I've run into a problem using prefix's in the assembler on an x86 target
[...]
> error saying the '[' is invalid.  It does accept the lock prefix if
> its on a seperate line by itself. ie

>    lock
>    incw [eax]x

> works fine. However, we can't issue that from the asm statement in 
> the conmpiler. 

Wrong.  You can:

        asm {
           "lock \n incw [eax]x"
        }

or, maybe even more obviously:

        asm {
           lock ; incw [eax]x
        }

That's how all prefix operations are supposed to be written in GAS,
AFAIK.

>   }

-- 
Hans-Bernhard Broeker (address@hidden)
Even if all the snow were burnt, ashes would remain.