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Re: [Qemu-devel] [PATCH 23/23] target-sparc: Optimize conditionals using
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH 23/23] target-sparc: Optimize conditionals using SUBCC |
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Date: |
Sun, 07 Oct 2012 12:16:52 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120911 Thunderbird/15.0.1 |
On 10/07/2012 11:48 AM, Blue Swirl wrote:
> This is not yet optimal, we could do the same trick as is done for x86
> for cmp/jcc case (target-i386/translate.c:889), but it's still an
> improvement so I applied it with others.
It's trickier with sparc, because of the (exceedingly rare) conditional
branch in branch delay slot case. I've yet to come up with a plan to
handle that which is better than the existing cpu_cond global variable.
(Which we now at least initialize with setcond.)
r~
- [Qemu-devel] [PATCH 11/23] target-sparc: Use DisasCompare in Tcc, (continued)
- [Qemu-devel] [PATCH 11/23] target-sparc: Use DisasCompare in Tcc, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 13/23] target-sparc: Use DisasCompare and movcond in MOVCC, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 18/23] target-sparc: Move taddcctv and tsubcctv out of line, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 04/23] target-sparc: Tidy flush_cond interface, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 16/23] target-sparc: Move sdivx and udivx out of line, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 14/23] target-sparc: Use DisasCompare and movcond in MOVR, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 15/23] target-sparc: Use movcond in gen_generic_branch, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 21/23] target-sparc: Cleanup "global" temporary allocation, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 23/23] target-sparc: Optimize conditionals using SUBCC, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 22/23] target-sparc: Fall through from not-taken trap, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 19/23] target-sparc: Use movcond in mulscc, Richard Henderson, 2012/10/05
- [Qemu-devel] [PATCH 20/23] target-sparc: Use movcond for FMOV*R, Richard Henderson, 2012/10/05
- Re: [Qemu-devel] [PATCH 00/23] target-sparc comparison improvements, Blue Swirl, 2012/10/07