From: Richard Henderson <rth@twiddle.net>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-devel@nongnu.org, Aurelien Jarno <aurelien@aurel32.net>
Subject: Re: [Qemu-devel] [PATCH v4 01/18] tcg-arm: Fix local stack frame
Date: Sat, 30 Mar 2013 14:19:42 -0700 [thread overview]
Message-ID: <515756EE.8070308@twiddle.net> (raw)
In-Reply-To: <CAFEAcA_yfWUbLdbbeKjQqfpBTsURVdLQ1s-56X=OhCDdHACsCA@mail.gmail.com>
On 2013-03-30 14:14, Peter Maydell wrote:
> If you're doing a sub sp, sp, #n anyway, you might as well
> add 4 to that and drop the save/load of r12 from the stmdb/ldmia.
> It was only in there to save having an extra sub/add insn.
Fair enough, not that it ought to make a difference to the cycle count.
r~
next prev parent reply other threads:[~2013-03-30 21:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-30 20:43 [Qemu-devel] [PATCH v4 00/18] tcg-arm improvements Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 01/18] tcg-arm: Fix local stack frame Richard Henderson
2013-03-30 21:14 ` Peter Maydell
2013-03-30 21:19 ` Richard Henderson [this message]
2013-03-30 21:45 ` Peter Maydell
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 02/18] tcg-arm: Use bic to implement and with constant Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 03/18] tcg-arm: Handle negated constant arguments to and/sub Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 04/18] tcg-arm: Allow constant first argument to sub Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 05/18] tcg-arm: Use tcg_out_dat_rIN for compares Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 06/18] tcg-arm: Handle constant arguments to add2/sub2 Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 07/18] tcg-arm: Improve constant generation Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 08/18] tcg-arm: Implement deposit for armv7 Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 09/18] tcg-arm: Implement division instructions Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 10/18] tcg-arm: Use TCG_REG_TMP name for the tcg temporary Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 11/18] tcg-arm: Use R12 " Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 12/18] tcg-arm: Cleanup multiply subroutines Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 13/18] tcg-arm: Cleanup most primitive load store subroutines Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 14/18] tcg-arm: Split out tcg_out_tlb_read Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 15/18] tcg-arm: Improve scheduling of tcg_out_tlb_read Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 16/18] tcg-arm: Use movi32 + blx for calls on v7 Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 17/18] tcg-arm: Convert to CONFIG_QEMU_LDST_OPTIMIZATION Richard Henderson
2013-03-30 20:43 ` [Qemu-devel] [PATCH v4 18/18] tcg-arm: Tidy exit_tb Richard Henderson
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