From: Richard Henderson <rth@twiddle.net>
To: Blue Swirl <blauwirbel@gmail.com>
Cc: qemu-devel@nongnu.org
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 [thread overview]
Message-ID: <50672E12.5090302@twiddle.net> (raw)
In-Reply-To: <CAAu8pHsmFpJX7fRO6-_Jx8v2wFtcooVXysEcaaV7XechUQACgg@mail.gmail.com>
On 2012-09-29 05:07, Blue Swirl wrote:
> On Thu, Sep 27, 2012 at 1:55 AM, Richard Henderson <rth@twiddle.net> 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~
next prev parent reply other threads:[~2012-09-29 17:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-27 1:55 [Qemu-devel] [PATCH 00/12] tcg-sparc fixes and improvements Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 01/12] tcg-sparc: Fix brcond2 Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 02/12] tcg-sparc: Implement movcond Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 03/12] tcg-sparc: Fix setcond2 Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 04/12] tcg-sparc: Fix qemu_st for 32-bit Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 05/12] tcg-sparc: Fix setcond Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 06/12] tcg-sparc: Fix add2/sub2 Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 07/12] tcg-sparc: Use Z constraint for %g0 Richard Henderson
2012-09-29 11:55 ` Blue Swirl
2012-09-27 1:55 ` [Qemu-devel] [PATCH 08/12] tcg-sparc: Optimize setcond2 equality compare with 0 Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 09/12] tcg-sparc: Drop use of Bicc in favor of BPcc Richard Henderson
2012-09-29 12:07 ` Blue Swirl
2012-09-29 17:21 ` Richard Henderson [this message]
2012-09-27 1:55 ` [Qemu-devel] [PATCH 10/12] tcg-sparc: Dump illegal opode contents Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 11/12] tcg-sparc: Emit BPr insns for brcond_i64 Richard Henderson
2012-09-27 1:55 ` [Qemu-devel] [PATCH 12/12] tcg-sparc: Emit MOVR insns for setcond_i64 and movcond_64 Richard Henderson
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