Re: [patch]: Fix access to SPU registers for fortran

[Markus Deuling <deuling at de dot ibm dot com>]

Hi,

Daniel Jacobowitz schrieb:
> On Mon, Apr 21, 2008 at 10:00:42PM +0200, Ulrich Weigand wrote:
> > Daniel Jacobowitz wrote:
> >
> > > Not without documentation, please.  Syntax that doesn't come from
> > > Fortran (as far as I know) and isn't in the manual might as well not
> > > be there :-)
> > Hmmm, most of the output changes in Markus' patch actually bring the
> > output in line with correct Fortran syntax in the first place ;-)
> >
> > The one addition is the representation of "union" types in the output;
> > this can never happen in regular Fortran, but can happen if you access
> > registers that use a gdbarch-defined union type.  This extension is
> > simply the "C_Union" marker; note that as far as the *parser* is
> > concerned, there is no syntax extension.
> >
> > But I guess you're right that this extension should be documented.
> > I assume the right place would be somewhere in section 12.4.3 Fortran?
>
> I see.  I didn't realize we already had the % operator that did the
> necessary operation - I must have not found it when this was last
> discussed.
>
> Maybe we could mention it in the Operators bit of the Fortran
> documentation, and there add that GDB allows it on unions?


thanks for your comments. I added some lines to the documentation.
Is this ok ?

ChangeLog:

	* gdb.texinfo (Fortran Operators): Describe '%' operator.


--
 Markus Deuling
 GNU Toolchain for Linux on Cell BE
 deuling@de.ibm.com

diff -urpN src/gdb/doc/gdb.texinfo dev/gdb/doc/gdb.texinfo
--- src/gdb/doc/gdb.texinfo	2008-04-21 06:23:26.000000000 +0200
+++ dev/gdb/doc/gdb.texinfo	2008-04-22 07:10:59.000000000 +0200
@@ -9903,6 +9903,12 @@ of the second one.
 @item :
 The range operator.  Normally used in the form of array(low:high) to
 represent a section of array.
+
+@item %
+The access component operator.  Normally used to access elements in derived
+types.  Also suitable for unions.  As unions aren't part of regular fortran
+this can only happen when accessing a register that uses a gdbarch-defined
+union type.
 @end table
 
 @node Fortran Defaults