[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH 09/12] tcg-sparc: Drop use of Bicc in favor of B
|
From: |
Richard Henderson |
|
Subject: |
Re: [Qemu-devel] [PATCH 09/12] tcg-sparc: Drop use of Bicc in favor of BPcc |
|
Date: |
Sat, 29 Sep 2012 10:21:22 -0700 |
|
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120911 Thunderbird/15.0.1 |
On 2012-09-29 05:07, Blue Swirl wrote:
> On Thu, Sep 27, 2012 at 1:55 AM, Richard Henderson <address@hidden> wrote:
>> Now that we're always sparcv9, we can not bother using Bicc for
>> 32-bit branches and BPcc for 64-bit branches and instead always
>> use BPcc.
>
> But then the branch range is smaller (19 bits). The code buffer is
> 32M, wouldn't we use BPcc for TB linking too and then the range could
> be exceed?
We use CALL for TB linking, with its 30 bit range.
BPcc is only needed within a TB, which should never come close to 2MB.
r~
- [Qemu-devel] [PATCH 02/12] tcg-sparc: Implement movcond., (continued)
- [Qemu-devel] [PATCH 02/12] tcg-sparc: Implement movcond., Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 04/12] tcg-sparc: Fix qemu_st for 32-bit, Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 06/12] tcg-sparc: Fix add2/sub2, Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 05/12] tcg-sparc: Fix setcond, Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 08/12] tcg-sparc: Optimize setcond2 equality compare with 0., Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 07/12] tcg-sparc: Use Z constraint for %g0, Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 11/12] tcg-sparc: Emit BPr insns for brcond_i64, Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 09/12] tcg-sparc: Drop use of Bicc in favor of BPcc, Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 12/12] tcg-sparc: Emit MOVR insns for setcond_i64 and movcond_64, Richard Henderson, 2012/09/26
- [Qemu-devel] [PATCH 10/12] tcg-sparc: Dump illegal opode contents, Richard Henderson, 2012/09/26