From: "Richard W.M. Jones" <rjones@redhat.com>
To: Richard Henderson <rth@twiddle.net>
Cc: aurelien@aurel32.net, qemu-devel@nongnu.org, anthony@codemonkey.ws
Subject: Re: [Qemu-devel] [PULL 7/7] tcg-i386: Use new return-argument ld/st helpers
Date: Wed, 28 Aug 2013 23:55:54 +0100 [thread overview]
Message-ID: <20130828225553.GA732@redhat.com> (raw)
In-Reply-To: <1377550812-908-8-git-send-email-rth@twiddle.net>
On Mon, Aug 26, 2013 at 02:00:12PM -0700, Richard Henderson wrote:
> Discontinue the jump-around-jump-to-jump scheme, trading it for a single
> immediate move instruction. The two extra jumps always consume 7 bytes,
> whereas the immediate move is either 5 or 7 bytes depending on where the
> code_gen_buffer gets located.
This seems to have broken qemu-system-ppc64:
https://bugs.launchpad.net/qemu/+bug/1218098
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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next prev parent reply other threads:[~2013-08-28 22:56 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-26 21:00 [Qemu-devel] [PULL 0/7] Improve tcg ldst optimization Richard Henderson
2013-08-26 21:00 ` [Qemu-devel] [PULL 1/7] tcg: Tidy generated code for tcg_outN Richard Henderson
2013-08-26 21:00 ` [Qemu-devel] [PULL 2/7] tcg-i386: Add and use tcg_out64 Richard Henderson
2013-08-26 21:00 ` [Qemu-devel] [PULL 3/7] tcg-i386: Try pc-relative lea for constant formation Richard Henderson
2013-08-26 21:00 ` [Qemu-devel] [PULL 4/7] tcg-i386: Tidy qemu_ld/st slow path Richard Henderson
2013-08-26 21:00 ` [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument Richard Henderson
2013-08-26 22:26 ` Paolo Bonzini
2013-08-26 22:34 ` Richard Henderson
2013-08-27 10:46 ` Aurelien Jarno
2013-08-27 14:53 ` Richard Henderson
2013-08-27 15:43 ` Aurelien Jarno
2013-08-27 15:53 ` Richard Henderson
2013-08-26 23:26 ` Peter Maydell
2013-08-27 10:47 ` Aurelien Jarno
2013-08-26 21:00 ` [Qemu-devel] [PULL 6/7] tcg: Tidy softmmu_template.h Richard Henderson
2013-08-26 21:00 ` [Qemu-devel] [PULL 7/7] tcg-i386: Use new return-argument ld/st helpers Richard Henderson
2013-08-28 22:55 ` Richard W.M. Jones [this message]
2013-08-29 15:21 ` [Qemu-devel] [PATCH] tcg-i386: Remove abort from GETPC_LDST Richard Henderson
2013-08-29 15:28 ` Paolo Bonzini
2013-08-29 15:32 ` Richard Henderson
2013-08-29 15:50 ` Richard W.M. Jones
2013-08-29 19:13 ` Aurelien Jarno
2013-08-27 21:30 ` [Qemu-devel] [PULL 0/7] Improve tcg ldst optimization Aurelien Jarno
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