From: Richard Henderson <rth@twiddle.net>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: kai@tp1.ruhr-uni-bochum.de, linux-kernel@vger.kernel.org,
Julian Anastasov <ja@ssi.bg>
Subject: Re: cpuid_eax damages registers (2.4.7pre7)
Date: Sat, 21 Jul 2001 17:00:18 -0700 [thread overview]
Message-ID: <20010721170018.C3676@twiddle.net> (raw)
In-Reply-To: <Pine.LNX.4.33.0107181014590.883-100000@penguin.transmeta.com> <Pine.LNX.4.33.0107182239050.1298-100000@vaio> <200107182204.f6IM4K001282@penguin.transmeta.com>
In-Reply-To: <200107182204.f6IM4K001282@penguin.transmeta.com>; from torvalds@transmeta.com on Wed, Jul 18, 2001 at 03:04:20PM -0700
On Wed, Jul 18, 2001 at 03:04:20PM -0700, Linus Torvalds wrote:
> Can you verify with this alternate patch instead?
I take it you've found something that happens to work with egcs 1.1?
At a glance the bug appears to be the one that caused
gcc/testsuite/gcc.dg/clobbers.c to be written. That one
is a fundamental flaw in reload that caused it to be
largely rewritten for gcc 2.95.
In other words, you may not be able to find a workaround
for egcs 1.1 that works for all cases. Using an alternative
that writes all of eax/ebx/ecx/edx to memory is probably
safer if none of the uses of cpuid are performance-critical.
r~
next prev parent reply other threads:[~2001-07-22 0:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-18 10:48 cpuid_eax damages registers (2.4.7pre7) Julian Anastasov
2001-07-18 15:10 ` Linus Torvalds
2001-07-18 17:08 ` Julian Anastasov
2001-07-18 17:21 ` Linus Torvalds
2001-07-18 20:43 ` Kai Germaschewski
2001-07-18 22:04 ` Linus Torvalds
2001-07-18 22:25 ` Kai Germaschewski
2001-07-19 8:23 ` Julian Anastasov
2001-07-19 18:36 ` H. Peter Anvin
2001-07-20 1:42 ` Julian Anastasov
2001-07-19 22:51 ` H. Peter Anvin
2001-07-20 2:01 ` Julian Anastasov
2001-07-19 23:02 ` H. Peter Anvin
2001-07-19 22:55 ` Linus Torvalds
2001-07-20 2:19 ` Julian Anastasov
2001-07-19 23:23 ` H. Peter Anvin
2001-07-19 23:24 ` Linus Torvalds
2001-07-22 0:00 ` Richard Henderson [this message]
2001-07-22 4:27 ` H. Peter Anvin
2001-07-21 23:45 ` Richard Henderson
-- strict thread matches above, loose matches on Subject: below --
2001-07-18 20:30 Rick Hohensee
2001-07-19 5:15 ` Keith Owens
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