From: Carlos O'Donell <carlos@systemhalted.org>
To: John David Anglin <dave@hiauly1.hia.nrc.ca>
Cc: tausq@debian.org, parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Re: Non-inline math, and inline math broken, GCC to blame? (1 hppa tls toolchain regression).
Date: Sat, 16 Jul 2005 17:18:35 -0400 [thread overview]
Message-ID: <20050716211835.GK5314@systemhalted.org> (raw)
In-Reply-To: <200507162029.j6GKTsGE011108@hiauly1.hia.nrc.ca>
On Sat, Jul 16, 2005 at 04:29:54PM -0400, John David Anglin wrote:
> > Will this ever happen during inlining?
> >
> > fstd chain -> memory
> > operation 1
> > fstd chain -> memory
> > fldd chain -> regs
> > operation 2
> > fldd chain -> regs
> >
> > Operation 2 could trap when expected that it couldn't because the fstd
> > had cleared the traps.
>
> I guess clobbering all the fp registers plus r0 will stop this.
That seems like overkill, I just don't want gcc schedule between the asm
statements. The fstd chain, and fldd chain are always asm statements.
Is there no other way? Clobbering will add huge register pressure and
force gcc to spill all the fpregs and restore after the call.
c.
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next prev parent reply other threads:[~2005-07-16 21:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-15 14:26 [parisc-linux] TLS toolchain update (6 regressions left) Carlos O'Donell
2005-07-15 23:44 ` [parisc-linux] Non-inline math, and inline math broken, GCC to blame? (1 hppa tls toolchain regression) Carlos O'Donell
2005-07-16 0:08 ` [parisc-linux] " John David Anglin
2005-07-16 0:57 ` Carlos O'Donell
2005-07-16 1:14 ` Carlos O'Donell
2005-07-16 1:54 ` John David Anglin
2005-07-16 18:38 ` Carlos O'Donell
2005-07-16 19:15 ` John David Anglin
2005-07-16 19:16 ` Carlos O'Donell
2005-07-16 19:48 ` John David Anglin
2005-07-16 20:13 ` Carlos O'Donell
2005-07-16 20:29 ` John David Anglin
2005-07-16 21:18 ` Carlos O'Donell [this message]
2005-07-16 22:55 ` John David Anglin
2005-07-17 16:21 ` [parisc-linux] TLS toolchain update (6 regressions left) Carlos O'Donell
[not found] <no.id>
2005-07-16 2:55 ` [parisc-linux] Re: Non-inline math, and inline math broken, GCC to blame? (1 hppa tls toolchain regression) John David Anglin
2005-07-16 16:16 ` Carlos O'Donell
2005-07-16 17:37 ` John David Anglin
2005-07-16 17:54 ` John David Anglin
2005-07-16 19:41 ` Carlos O'Donell
2005-07-16 19:56 ` John David Anglin
2005-07-16 19:15 ` Carlos O'Donell
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