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Re: [Qemu-devel] [PULL 7/7] tcg-i386: Use new return-argument ld/st help
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From: |
Richard W.M. Jones |
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Subject: |
Re: [Qemu-devel] [PULL 7/7] tcg-i386: Use new return-argument ld/st helpers |
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Date: |
Wed, 28 Aug 2013 23:55:54 +0100 |
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User-agent: |
Mutt/1.5.20 (2009-12-10) |
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
libguestfs lets you edit virtual machines. Supports shell scripting,
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- Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, (continued)
- Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, Paolo Bonzini, 2013/08/26
- Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, Richard Henderson, 2013/08/26
- Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, Aurelien Jarno, 2013/08/27
- Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, Richard Henderson, 2013/08/27
- Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, Aurelien Jarno, 2013/08/27
- Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, Richard Henderson, 2013/08/27
Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument, Peter Maydell, 2013/08/26
[Qemu-devel] [PULL 6/7] tcg: Tidy softmmu_template.h, Richard Henderson, 2013/08/26
[Qemu-devel] [PULL 7/7] tcg-i386: Use new return-argument ld/st helpers, Richard Henderson, 2013/08/26
Re: [Qemu-devel] [PULL 0/7] Improve tcg ldst optimization, Aurelien Jarno, 2013/08/27