Re: A Far Less Ambitous AltiVec patch

[Dale Johannesen <dalej at apple dot com>]

On Feb 2, 2004, at 1:18 PM, Aldy Hernandez wrote:
> >         else
> > ! 	fprintf (file, "%d", REGNO (XEXP (x, 0)));
> >         return;
>
> >       case 'q':
> > --- 8960,8966 ----
> >   	  || REGNO (XEXP (x, 0)) >= 32)
> >   	output_operand_lossage ("invalid %%P value");
> >         else
> > ! 	fprintf (file, "%s", reg_names[REGNO (XEXP (x, 0))]);
>
> Uhh, what in the world is this?  I thought all assemblers were
> supposed to support plain reg numbers.

No, the Darwin assembler requires register names to be used where
a field represents a register, and constants to be used for constant
fields.  In particular, the load and store instructions where you can
have either Rn (n!=0) or constant 0 must say what they mean.
Having used this assembler for a while now, I think it's an excellent
idea; several register-allocation bugs have been caught at assembly
time as a result.