Re: [RFA] New bitflags type and eflags on i386/x86-64

[Daniel Jacobowitz <drow@mvista.com>]

On Mon, Apr 22, 2002 at 05:15:34PM +0200, Michal Ludvig wrote:
> Hi all,
> I've created a new typecode TYPE_CODE_FLAGS with appropriate functions 
> and used it in builtin_type_i386_eflags type. I did this to be able to 
> print i386's and x86-64's FLAGS register in a symbolic form, instead of 
> printing it in a hexadecimal and decimal notation.
> 
> Now it looks like this:
> (gdb) info registers eflags
> eflags         0x747    [ DF IF TF ZF PF CF ]
> 
> I've chosen quite a generic way for implementation, so that the others 
> could use this for their types as well. For now I'm using this  type 
> only on x86-64, but using it on i386 should be possible without 
> modifications. (BTW Should I do it or the maintainer will?)
> 
> Any comments? Can I commit?

First of all, please include ChangeLog entries; it makes patches easier
to digest quickly.

Second, I see that you assume a TYPE_CODE_FLAGS type is the size of a
long.  I'm not fond of that.  I would prefer if you instead added
support to c-valprint.c for something like Pascal's TYPE_CODE_SET (see
p-valprint.c) and used that.  It should be exactly what you're looking
for.  Basically, you create an enum describing the bit position (not
mask) for each flag, and then call create_set_type with that type as
the domain_type.


-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer