From: Richard Henderson <rth@twiddle.net>
To: Alexander Graf <agraf@suse.de>
Cc: "Edgar E.Iglesias" <edgar.iglesias@gmail.com>,
qemu-devel@nongnu.org, aurelien@aurel32.net
Subject: Re: [Qemu-devel] [PATCH 5/7] tcg-i386: Implement deposit operation.
Date: Wed, 26 Jan 2011 11:05:54 -0800 [thread overview]
Message-ID: <4D407092.9090401@twiddle.net> (raw)
In-Reply-To: <4D406F97.8050001@suse.de>
On 01/26/2011 11:01 AM, Alexander Graf wrote:
>> As far as I know, it does not happen at random. Which seems to be
>> what you are suggesting.
>
> It happens on load/store and potentially helpers. The main difference
> IIUC between globals and temps is that globals are kept in registers as
> long as possible (read: until load/store or helper or tb end gets
> emitted) while temporaries are not stored back to any memory, so they
> are lost on load/store.
>
> So what you are suggesting is basically to use a different set of
> globals for regs32 and to keep track of their usage throughout the TB,
> so we can convert on demand. We can't use temporaries for that unless we
> manually store them off on load/store/helper/tb end which means we'd
> rewrite the globals treatment in target code :).
No, what I'm suggesting is manually storing the reg32 temporaries back
to their reg64 origins in the translator immediately before issuing the
load/store/helper/tbend, at which point the generic TCG bits write back
the reg64 globals to their env origin.
Do you have a pointer to your s390x tree?
r~
next prev parent reply other threads:[~2011-01-26 19:06 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-11 3:23 [Qemu-devel] [PATCH 0/7] Define "deposit" tcg operation, v2 Richard Henderson
2011-01-11 3:23 ` [Qemu-devel] [PATCH 1/7] tcg: Define "deposit" as an optional operation Richard Henderson
2011-01-11 23:45 ` Aurelien Jarno
2011-01-12 11:00 ` Edgar E. Iglesias
2011-01-11 3:23 ` [Qemu-devel] [PATCH 2/7] tcg-ppc: Implement deposit operation Richard Henderson
2011-01-11 12:40 ` [Qemu-devel] " malc
2011-01-11 16:32 ` Richard Henderson
2011-01-11 19:11 ` malc
2011-01-11 3:23 ` [Qemu-devel] [PATCH 3/7] tcg-hppa: " Richard Henderson
2011-01-11 3:23 ` [Qemu-devel] [PATCH 4/7] tcg-ia64: " Richard Henderson
2011-01-11 3:23 ` [Qemu-devel] [PATCH 5/7] tcg-i386: " Richard Henderson
2011-01-25 12:27 ` Edgar E. Iglesias
2011-01-25 16:13 ` Richard Henderson
2011-01-25 16:48 ` Edgar E. Iglesias
2011-01-25 22:07 ` Richard Henderson
2011-01-26 8:53 ` Edgar E. Iglesias
2011-01-26 9:23 ` Alexander Graf
2011-01-26 15:50 ` Richard Henderson
2011-01-26 16:00 ` Alexander Graf
2011-01-26 16:34 ` Avi Kivity
2011-01-26 16:40 ` Richard Henderson
2011-01-26 16:50 ` Alexander Graf
2011-01-26 18:21 ` Richard Henderson
2011-01-26 18:27 ` Alexander Graf
2011-01-26 18:55 ` Richard Henderson
2011-01-26 19:01 ` Alexander Graf
2011-01-26 19:05 ` Richard Henderson [this message]
2011-01-26 19:09 ` Alexander Graf
2011-01-26 19:19 ` Richard Henderson
2011-01-26 19:27 ` Alexander Graf
2011-01-31 8:33 ` Aurelien Jarno
2011-02-08 18:05 ` Richard Henderson
2011-02-09 7:41 ` [Qemu-devel] " Paolo Bonzini
2011-02-09 17:24 ` Blue Swirl
2011-01-11 3:23 ` [Qemu-devel] [PATCH 6/7] target-i386: Use " Richard Henderson
2011-01-12 11:01 ` Edgar E. Iglesias
2011-01-20 11:06 ` Aurelien Jarno
2011-01-11 3:23 ` [Qemu-devel] [PATCH 7/7] target-ppc: " Richard Henderson
2011-01-11 23:45 ` [Qemu-devel] [PATCH 0/7] Define "deposit" tcg operation, v2 Aurelien Jarno
2011-01-20 11:31 ` Edgar E. Iglesias
-- strict thread matches above, loose matches on Subject: below --
2011-01-07 22:42 [Qemu-devel] [PATCH 0/7] Define "deposit" tcg operation Richard Henderson
2011-01-07 22:43 ` [Qemu-devel] [PATCH 5/7] tcg-i386: Implement deposit operation Richard Henderson
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