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Date: Thu, 22 Nov 2001 13:55:50 +0300
From: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
To: Richard Henderson <rth@redhat.com>
Cc: Jay.Estabrook@compaq.com, linux-kernel@vger.kernel.org
Subject: Re: [alpha] cleanup opDEC workaround
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In-Reply-To: <20011121142753.A876@redhat.com>; from rth@redhat.com on Wed, Nov 21, 2001 at 02:27:53PM -0800
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On Wed, Nov 21, 2001 at 02:27:53PM -0800, Richard Henderson wrote:
> Actually, the custom entIF isn't that much work.  What about this?

Hmm, I like it.
However, if I didn't missed something again, some corrections are required.
First, in opDEC_check_entIF r16 should be stored on the stack frame
(PAL_rti will restore it). Also, if SRM is broken and doesn't update pc,
we'll jump back to cvttq/svm. So I think we need something like this:

opDEC_check_entIF:				\n\
	ldq $16,8($sp)				\n\
+	stq $16,24($sp)				\n\
+	addq $16,4,$16				\n\
+	stq $16,8($sp)				\n\
	call_pal 63	/* PAL_rti */		\n\

and

		"cvttq/svm $f31, $f31\n\t"
+		"nop\n\t"
		"subq $16, %0, %0"

No?

Ivan.
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