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Re: [Qemu-devel] [PATCH 10/21] tcg: Optimize some forms of deposit.
From: |
Richard Henderson |
Subject: |
Re: [Qemu-devel] [PATCH 10/21] tcg: Optimize some forms of deposit. |
Date: |
Tue, 18 Oct 2011 15:27:09 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:7.0) Gecko/20110927 Thunderbird/7.0 |
On 10/18/2011 01:30 PM, Blue Swirl wrote:
> On Tue, Oct 18, 2011 at 6:50 PM, Richard Henderson <address@hidden> wrote:
>> If the deposit replaces the entire word, optimize to a move.
>>
>> If we're inserting to the top of the word, avoid the mask of arg2
>> as we'll be shifting out all of the garbage and shifting in zeros.
>>
>> If the host is 32-bit, reduce a 64-bit deposit to a 32-bit deposit
>> when possible.
>>
>> Signed-off-by: Richard Henderson <address@hidden>
>
> Nice patch, but why would it belong to this series?
Only because we start generating a lot of these special cases in this
series. It's certainly otherwise independent.
r~
- [Qemu-devel] [PATCH 12/21] sparc-linux-user: Handle SIGILL., (continued)
- [Qemu-devel] [PATCH 12/21] sparc-linux-user: Handle SIGILL., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 15/21] target-sparc: Implement EDGE* instructions., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 09/21] target-sparc: Change fpr representation to doubles., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 14/21] target-sparc: Implement fpack{16, 32, fix}., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 10/21] tcg: Optimize some forms of deposit., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 08/21] target-sparc: Undo cpu_fpr rename., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 20/21] sparc-linux-user: Add some missing syscall numbers, Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 07/21] target-sparc: Extract float128 move to a function., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 21/21] sparc-linux-user: Enable NPTL, Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 03/21] target-sparc: Add accessors for double-precision fpr access., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 18/21] target-sparc: Tidy fpack32., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 16/21] target-sparc: Implement ALIGNADDR* inline., Richard Henderson, 2011/10/18
- [Qemu-devel] [PATCH 19/21] target-sparc: Implement FALIGNDATA inline., Richard Henderson, 2011/10/18
- Re: [Qemu-devel] [PATCH 00/21] Sparc FPU/VIS improvements, Blue Swirl, 2011/10/18