From: Geoff Keating <geoffk@geoffk.org>
To: rth@redhat.com
Cc: aldyh@redhat.com, gcc-patches@gcc.gnu.org
Subject: Re: altivec patches
Date: Tue, 13 Nov 2001 04:33:00 -0000 [thread overview]
Message-ID: <200111071049.CAA24232@geoffk.org> (raw)
Message-ID: <20011113043300.ws-ykKN2i1sPZxomtpRS4PoINIKzQMU8Xhk2hclq3tw@z> (raw)
In-Reply-To: <20011106231648.G29844@redhat.com>
> Date: Tue, 6 Nov 2001 23:16:48 -0800
> From: Richard Henderson <rth@redhat.com>
> Cc: aldyh@redhat.com, gcc-patches@gcc.gnu.org
> Mail-Followup-To: Richard Henderson <rth@redhat.com>,
> Geoff Keating <geoffk@redhat.com>, aldyh@redhat.com,
> gcc-patches@gcc.gnu.org
> Content-Disposition: inline
> User-Agent: Mutt/1.2.5i
>
> On Mon, Nov 05, 2001 at 01:58:06PM -0800, Geoff Keating wrote:
> > > - #define STACK_BOUNDARY (TARGET_32BIT ? 64 : 128)
> > > + #define STACK_BOUNDARY ((TARGET_32BIT && !TARGET_ALTIVEC_ABI) ? 64 : 128)
> > > - #define BIGGEST_ALIGNMENT 64
> > > + #define BIGGEST_ALIGNMENT (TARGET_ALTIVEC_ABI ? 128 : 64)
> >
> > I think you _don't_ want this to be dependent on the ABI. Changing
> > this isn't an ABI change (I hope!), which is good because...
>
> Yes it is. REGNO_POINTER_ALIGN(STACK_POINTER_REGNUM) == STACK_BOUNDARY.
>
> Remember that STACK_BOUNDARY != PREFERRED_STACK_BOUNDARY, and that the
> later does not help you unless you also have code to enforce stack
> alignment, like we're supposed to have for x86 vector code.
Here I was talking about BIGGEST_ALIGNMENT only. Changing
STACK_BOUNDARY is of course an ABI change.
> > The DWARF_FRAME_REGISTERS change seems to have gone away, which is not
> > quite right: it has to happen _only when the ABI is 'altivec'_.
>
> I _think_ you don't have to worry about this any longer. The ia64
> eh library interface does not expose the number of registers
> involved.
>
> We might ought to have checks added to die more gracefully if the
> target adds registers, since we do statically allocate this space
> and older libgcc would not be able to unwind for newer gcc code.
The complexities of this boggle my mind. I think we haven't even
decided on how some of the pieces should work yet.
Can we really change the EH library interface like this? Even in the
presence of a glibc compatibility layer to support pre-gcc3.0 C++
binaries?
--
- Geoffrey Keating <geoffk@geoffk.org> <geoffk@redhat.com>
next prev parent reply other threads:[~2001-11-13 4:33 UTC|newest]
Thread overview: 185+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-05 12:52 Aldy Hernandez
2001-11-05 12:58 ` Aldy Hernandez
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-05 12:59 ` Joseph S. Myers
2001-11-05 13:04 ` Aldy Hernandez
2001-11-05 13:17 ` Joseph S. Myers
2001-11-13 4:32 ` Joseph S. Myers
2001-11-13 15:03 ` Joseph S. Myers
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:32 ` Joseph S. Myers
2001-11-13 15:03 ` Joseph S. Myers
2001-11-05 13:59 ` Geoff Keating
2001-11-05 14:05 ` Alan Matsuoka
2001-11-05 18:22 ` Aldy Hernandez
2001-11-05 18:28 ` Alan Matsuoka
2001-11-05 18:41 ` Include facility for .md files - " Alan Matsuoka
2001-11-03 20:37 ` Geoff Keating
2001-11-13 4:26 ` Geoff Keating
2001-11-13 13:21 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-05 18:49 ` Joseph S. Myers
2001-11-05 19:03 ` Alan Matsuoka
2001-11-06 1:03 ` Joseph S. Myers
2001-11-06 4:56 ` Alan Matsuoka
2001-11-06 7:58 ` Alan Matsuoka
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alexandre Oliva
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 4:32 ` Joseph S. Myers
2001-11-13 15:03 ` Joseph S. Myers
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 4:32 ` Joseph S. Myers
2001-11-13 15:03 ` Joseph S. Myers
2001-11-05 18:58 ` Aldy Hernandez
2001-11-05 19:01 ` Alan Matsuoka
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-05 21:37 ` Alan Matsuoka
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-06 0:23 ` Gerald Pfeifer
2001-11-13 4:32 ` Gerald Pfeifer
2001-11-13 15:03 ` Gerald Pfeifer
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:32 ` Alan Matsuoka
2001-11-13 15:03 ` Alan Matsuoka
2001-11-05 14:31 ` Stan Shebs
2001-11-05 14:49 ` Geoff Keating
2001-11-05 15:29 ` Stan Shebs
2001-11-13 4:32 ` Stan Shebs
2001-11-13 15:03 ` Stan Shebs
2001-11-05 19:30 ` Aldy Hernandez
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:32 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-13 4:32 ` Stan Shebs
2001-11-13 15:03 ` Stan Shebs
2001-11-05 19:27 ` Aldy Hernandez
2001-11-05 20:10 ` Geoff Keating
2001-11-13 4:32 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-06 15:02 ` Aldy Hernandez
2001-11-06 15:14 ` Joseph S. Myers
2001-11-06 16:28 ` Aldy Hernandez
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:33 ` Joseph S. Myers
2001-11-13 15:03 ` Joseph S. Myers
2001-11-06 17:00 ` Dale Johannesen
2001-11-06 17:06 ` Aldy Hernandez
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:33 ` Dale Johannesen
2001-11-13 15:03 ` Dale Johannesen
2001-11-06 17:07 ` Stan Shebs
2001-11-06 17:15 ` Aldy Hernandez
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:33 ` Stan Shebs
2001-11-13 15:03 ` Stan Shebs
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-06 23:17 ` Richard Henderson
2001-11-07 2:50 ` Geoff Keating [this message]
2001-11-07 8:30 ` Aldy Hernandez
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-07 11:41 ` Richard Henderson
2001-11-07 12:12 ` Geoff Keating
2001-11-13 5:05 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-13 5:05 ` Richard Henderson
2001-11-13 15:03 ` Richard Henderson
2001-11-13 4:33 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-07 8:23 ` Aldy Hernandez
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:33 ` Richard Henderson
2001-11-13 15:03 ` Richard Henderson
2001-11-13 4:32 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-05 14:05 ` Dale Johannesen
2001-11-05 14:38 ` Geoff Keating
2001-11-13 4:32 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-05 18:30 ` Aldy Hernandez
2001-11-06 16:12 ` Daniel Jacobowitz
2001-11-06 16:46 ` Aldy Hernandez
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-07 2:36 ` Geoff Keating
2001-11-13 4:33 ` Geoff Keating
2001-11-13 15:03 ` Geoff Keating
2001-11-13 4:33 ` Daniel Jacobowitz
2001-11-13 15:03 ` Daniel Jacobowitz
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-05 19:47 ` Aldy Hernandez
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:32 ` Dale Johannesen
2001-11-13 15:03 ` Dale Johannesen
2001-11-05 14:39 ` Dale Johannesen
2001-11-05 18:35 ` Aldy Hernandez
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:32 ` Dale Johannesen
2001-11-13 15:03 ` Dale Johannesen
2001-11-13 4:32 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-07 10:02 David Edelsohn
2001-11-07 10:09 ` Aldy Hernandez
2001-11-07 10:13 ` David Edelsohn
2001-11-07 10:24 ` Aldy Hernandez
2001-11-07 10:26 ` David Edelsohn
2001-11-07 10:34 ` Aldy Hernandez
2001-11-07 14:19 ` David Edelsohn
2001-11-07 14:25 ` Aldy Hernandez
2001-11-13 5:05 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 5:05 ` David Edelsohn
2001-11-13 15:03 ` David Edelsohn
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-13 4:33 ` David Edelsohn
2001-11-13 15:03 ` David Edelsohn
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-07 10:34 ` Dale Johannesen
2001-11-13 4:33 ` Dale Johannesen
2001-11-13 15:03 ` Dale Johannesen
2001-11-13 4:33 ` David Edelsohn
2001-11-13 15:03 ` David Edelsohn
2001-11-13 4:33 ` Aldy Hernandez
2001-11-13 15:03 ` Aldy Hernandez
2001-11-07 10:16 ` Dale Johannesen
2001-11-13 4:33 ` Dale Johannesen
2001-11-13 15:03 ` Dale Johannesen
2001-11-13 4:33 ` David Edelsohn
2001-11-13 15:03 ` David Edelsohn
2001-11-08 14:33 David Edelsohn
2001-11-13 5:26 ` David Edelsohn
2001-11-13 15:03 ` David Edelsohn
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