I have read that but it does not tell me how to specify a register in the assembler command.
I want to get the value of r3 into my local C variable: i.
I have tried: asm ("stw %%r3, %0" : : "r" (i) : "r3")
However, that does not compile giving error "parameter syntax error (parameter 1)".
I have tried many, many other things but none of them even compile. Maybe it is not possible.
I am using gcc 3.3 for mac.
Martin
> -----Original Message-----
> From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx]On
> Behalf Of Ian Lance Taylor
> Sent: 22 December 2004 16:04
> To: Martin Payne
> Cc: gcc-help@xxxxxxxxxxx
> Subject: Re: Inline Assembler for PPC
>
>
> "Martin Payne" <martin@xxxxxxxxxxxxxxx> writes:
>
> > All I would like to do is to store the value of a C function I
> have just called into a C variable called "i".
> >
> > So instead of doing:
> >
> > i = myfunction();
> >
> > I want to do something like this:
> >
> > myfunction();
> > stw r3, i
> >
> > (I know the value of the function is stored into the r3 register.)
> >
> > It might look odd but I have my reasons for doing this.
> However, for everything I try with the keyword "asm" for inline
> assembler, it doesn't compile.
> >
> > All I want to do is put the value in register r3 into my C variable, i.
> >
> > Any ideas?
>
> Read
>
http://gcc.gnu.org/onlinedocs/gcc-3.4.3/gcc/Extended-Asm.html#Extended-Asm
If you have tried that already, then tell us what you did, and in what
way it did not work.
Ian
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